Bump to v1.14.0

As the title says.

[NO NEW TESTS NEEDED]

Signed-off-by: TomSweeneyRedHat <tsweeney@redhat.com>

.cirrus.yml

@@ -20,13 +20,8 @@ env:
     # Save a little typing (path relative to $CIRRUS_WORKING_DIR)
     SCRIPT_BASE: "./contrib/cirrus"
 
-    ####
-    #### Cache-image names to test with (double-quotes around names are critical)
-    ####
-    FEDORA_NAME: "fedora-36"
-
     # Google-cloud VM Images
-    IMAGE_SUFFIX: "c5495735033528320"
+    IMAGE_SUFFIX: "c20231116t174419z-f39f38d13"
     FEDORA_CACHE_IMAGE_NAME: "fedora-${IMAGE_SUFFIX}"
 
     # Container FQIN's
@@ -52,7 +47,9 @@ validate_task:
         image: '${SKOPEO_CIDEV_CONTAINER_FQIN}'
         cpu: 4
         memory: 8
-    script: |
+    setup_script: |
+        make tools
+    test_script: |
         make validate-local
         make vendor && hack/tree_status.sh
 
@@ -74,8 +71,36 @@ doccheck_task:
       "${SKOPEO_PATH}/${SCRIPT_BASE}/runner.sh" build
       "${SKOPEO_PATH}/${SCRIPT_BASE}/runner.sh" doccheck
 
+osx_task:
+    # Don't run for docs-only builds.
+    # Also don't run on release-branches or their PRs,
+    # since base container-image is not version-constrained.
+    only_if: &not_docs_or_release_branch >-
+        ($CIRRUS_BASE_BRANCH == $CIRRUS_DEFAULT_BRANCH ||
+         $CIRRUS_BRANCH == $CIRRUS_DEFAULT_BRANCH ) &&
+        $CIRRUS_CHANGE_TITLE !=~ '.*CI:DOCS.*'
+    depends_on:
+        - validate
+    macos_instance:
+        image: ghcr.io/cirruslabs/macos-ventura-base:latest
+    setup_script: |
+        export PATH=$GOPATH/bin:$PATH
+        brew update
+        brew install gpgme go go-md2man
+        make tools
+    test_script: |
+        export PATH=$GOPATH/bin:$PATH
+        go version
+        go env
+        make validate-local test-unit-local bin/skopeo
+        sudo make install
+        /usr/local/bin/skopeo -v
+
+
 cross_task:
     alias: cross
+    only_if: >-
+        $CIRRUS_CHANGE_TITLE !=~ '.*CI:DOCS.*'
     depends_on:
         - validate
     gce_instance: &standardvm
@@ -95,6 +120,42 @@ cross_task:
         "${GOSRC}/${SCRIPT_BASE}/runner.sh" cross
 
 
+ostree-rs-ext_task:
+    alias: proxy_ostree_ext
+    only_if: *not_docs_or_release_branch
+    # WARNING: This task potentially performs a container image
+    # build (on change) with runtime package installs.  Therefore,
+    # its behavior can be unpredictable and potentially flake-prone.
+    # In case of emergency, uncomment the next statement to bypass.
+    #
+    # skip: $CI == "true"
+    #
+    depends_on:
+        - validate
+    # Ref: https://cirrus-ci.org/guide/docker-builder-vm/#dockerfile-as-a-ci-environment
+    container:
+        # The runtime image will be rebuilt on change
+        dockerfile: contrib/cirrus/ostree_ext.dockerfile
+        docker_arguments:  # required build-args
+            BASE_FQIN: quay.io/coreos-assembler/fcos-buildroot:testing-devel
+            CIRRUS_IMAGE_VERSION: 2
+    env:
+        EXT_REPO_NAME: ostree-rs-ext
+        EXT_REPO_HOME: $CIRRUS_WORKING_DIR/../$EXT_REPO_NAME
+        EXT_REPO: https://github.com/ostreedev/${EXT_REPO_NAME}.git
+    skopeo_build_script:
+        - dnf builddep -y skopeo
+        - make
+        - make install
+    proxy_ostree_ext_build_script:
+        - git clone --depth 1 $EXT_REPO $EXT_REPO_HOME
+        - cd $EXT_REPO_HOME
+        - cargo test --no-run
+    proxy_ostree_ext_test_script:
+        - cd $EXT_REPO_HOME
+        - cargo test -- --nocapture --quiet
+
+
 #####
 ##### NOTE: This task is subtantially duplicated in the containers/image
 ##### repository's `.cirrus.yml`.  Changes made here should be fully merged
@@ -102,11 +163,10 @@ cross_task:
 #####
 test_skopeo_task:
     alias: test_skopeo
-    # Don't test for [CI:DOCS], [CI:BUILD], or 'multiarch' cron.
+    # Don't test for [CI:DOCS], [CI:BUILD].
     only_if: >-
         $CIRRUS_CHANGE_TITLE !=~ '.*CI:BUILD.*' &&
-        $CIRRUS_CHANGE_TITLE !=~ '.*CI:DOCS.*' &&
-        $CIRRUS_CRON != 'multiarch'
+        $CIRRUS_CHANGE_TITLE !=~ '.*CI:DOCS.*'
     depends_on:
         - validate
     gce_instance:
@@ -139,49 +199,6 @@ test_skopeo_task:
         "${SKOPEO_PATH}/${SCRIPT_BASE}/runner.sh" system
 
 
-image_build_task: &image-build
-    name: "Build multi-arch $CTXDIR"
-    alias: image_build
-    # Some of these container images take > 1h to build, limit
-    # this task to a specific Cirrus-Cron entry with this name.
-    only_if: $CIRRUS_CRON == 'multiarch'
-    timeout_in: 120m  # emulation is sssllllooooowwww
-    gce_instance:
-        <<: *standardvm
-        image_name: build-push-${IMAGE_SUFFIX}
-        # More muscle required for parallel multi-arch build
-        type: "n2-standard-4"
-    matrix:
-        - env:
-            CTXDIR: contrib/skopeoimage/upstream
-        - env:
-            CTXDIR: contrib/skopeoimage/testing
-        - env:
-            CTXDIR: contrib/skopeoimage/stable
-    env:
-        SKOPEO_USERNAME: ENCRYPTED[4195884d23b154553f2ddb26a63fc9fbca50ba77b3e447e4da685d8639ed9bc94b9a86a9c77272c8c80d32ead9ca48da]
-        SKOPEO_PASSWORD: ENCRYPTED[36e06f9befd17e5da2d60260edb9ef0d40e6312e2bba4cf881d383f1b8b5a18c8e5a553aea2fdebf39cebc6bd3b3f9de]
-        CONTAINERS_USERNAME: ENCRYPTED[dd722c734641f103b394a3a834d51ca5415347e378637cf98ee1f99e64aad2ec3dbd4664c0d94cb0e06b83d89e9bbe91]
-        CONTAINERS_PASSWORD: ENCRYPTED[d8b0fac87fe251cedd26c864ba800480f9e0570440b9eb264265b67411b253a626fb69d519e188e6c9a7f525860ddb26]
-    main_script:
-        - source /etc/automation_environment
-        - main.sh $CIRRUS_REPO_CLONE_URL $CTXDIR
-
-
-test_image_build_task:
-    <<: *image-build
-    alias: test_image_build
-    # Allow this to run inside a PR w/ [CI:BUILD] only.
-    only_if: $CIRRUS_PR != '' && $CIRRUS_CHANGE_TITLE =~ '.*CI:BUILD.*'
-    # This takes a LONG time, only run when requested.  N/B: Any task
-    # made to depend on this one will block FOREVER unless triggered.
-    # DO NOT ADD THIS TASK AS DEPENDENCY FOR `success_task`.
-    trigger_type: manual
-    # Overwrite all 'env', don't push anything, just do the build.
-    env:
-        DRYRUN: 1
-
-
 # This task is critical.  It updates the "last-used by" timestamp stored
 # in metadata for all VM images.  This mechanism functions in tandem with
 # an out-of-band pruning operation to remove disused VM images.
@@ -216,9 +233,10 @@ success_task:
     depends_on:
         - validate
         - doccheck
+        - osx
         - cross
+        - proxy_ostree_ext
         - test_skopeo
-        - image_build
         - meta
     container: *smallcontainer
     env:

.github/dependabot.yml

@@ -1,10 +0,0 @@
-version: 2
-updates:
-- package-ecosystem: gomod
-  directory: "/"
-  schedule:
-    interval: daily
-    time: "10:00"
-    timezone: Europe/Berlin
-  open-pull-requests-limit: 10
-

.github/renovate.json5

@@ -0,0 +1,52 @@
+/*
+   Renovate is a service similar to GitHub Dependabot, but with
+   (fantastically) more configuration options.  So many options
+   in fact, if you're new I recommend glossing over this cheat-sheet
+   prior to the official documentation:
+
+   https://www.augmentedmind.de/2021/07/25/renovate-bot-cheat-sheet
+
+   Configuration Update/Change Procedure:
+     1. Make changes
+     2. Manually validate changes (from repo-root):
+
+        podman run -it \
+            -v ./.github/renovate.json5:/usr/src/app/renovate.json5:z \
+            docker.io/renovate/renovate:latest \
+            renovate-config-validator
+     3. Commit.
+
+   Configuration Reference:
+   https://docs.renovatebot.com/configuration-options/
+
+   Monitoring Dashboard:
+   https://app.renovatebot.com/dashboard#github/containers
+
+   Note: The Renovate bot will create/manage it's business on
+         branches named 'renovate/*'.  Otherwise, and by
+         default, the only the copy of this file that matters
+         is the one on the `main` branch.  No other branches
+         will be monitored or touched in any way.
+*/
+
+{
+  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
+
+  /*************************************************
+   ****** Global/general configuration options *****
+   *************************************************/
+
+  // Re-use predefined sets of configuration options to DRY
+  "extends": [
+    // https://github.com/containers/automation/blob/main/renovate/defaults.json5
+    "github>containers/automation//renovate/defaults.json5"
+  ],
+
+  // Permit automatic rebasing when base-branch changes by more than
+  // one commit.
+  "rebaseWhen": "behind-base-branch",
+
+  /*************************************************
+   *** Repository-specific configuration options ***
+   *************************************************/
+}

.github/workflows/check_cirrus_cron.yml

@@ -3,103 +3,18 @@
 # See also:
 # https://github.com/containers/podman/blob/main/.github/workflows/check_cirrus_cron.yml
 
-# Format Ref: https://docs.github.com/en/free-pro-team@latest/actions/reference/workflow-syntax-for-github-actions
-
-# Required to un-FUBAR default ${{github.workflow}} value
-name: check_cirrus_cron
-
 on:
-    # Note: This only applies to the default branch.
-    schedule:
-        # N/B: This should correspond to a period slightly after
-        # the last job finishes running.  See job defs. at:
-        # https://cirrus-ci.com/settings/repository/6706677464432640
-        - cron:  '59 23 * * 1-5'
-    # Debug: Allow triggering job manually in github-actions WebUI
-    workflow_dispatch: {}
-
-permissions:
-    contents: read
-
-env:
-    # Debug-mode can reveal secrets, only enable by a secret value.
-    # Ref: https://help.github.com/en/actions/configuring-and-managing-workflows/managing-a-workflow-run#enabling-step-debug-logging
-    ACTIONS_STEP_DEBUG: '${{ secrets.ACTIONS_STEP_DEBUG }}'
-    # CSV listing of e-mail addresses for delivery failure or error notices
-    RCPTCSV: rh.container.bot@gmail.com,podman-monitor@lists.podman.io
-    # Filename for table of cron-name to build-id data
-    # (must be in $GITHUB_WORKSPACE/artifacts/)
-    NAME_ID_FILEPATH: './artifacts/name_id.txt'
+  # Note: This only applies to the default branch.
+  schedule:
+    # N/B: This should correspond to a period slightly after
+    # the last job finishes running.  See job defs. at:
+    # https://cirrus-ci.com/settings/repository/6706677464432640
+    - cron:  '03 03 * * 1-5'
+  # Debug: Allow triggering job manually in github-actions WebUI
+  workflow_dispatch: {}
 
 jobs:
-    cron_failures:
-        runs-on: ubuntu-latest
-        steps:
-            - uses: actions/checkout@629c2de402a417ea7690ca6ce3f33229e27606a5 # v2
-              with:
-                  persist-credentials: false
-
-            # Avoid duplicating cron_failures.sh in skopeo repo.
-            - uses: actions/checkout@629c2de402a417ea7690ca6ce3f33229e27606a5 # v2
-              with:
-                  repository: containers/podman
-                  path: '_podman'
-                  persist-credentials: false
-
-            - name: Get failed cron names and Build IDs
-              id: cron
-              run: './_podman/.github/actions/${{ github.workflow }}/${{ github.job }}.sh'
-
-            - if: steps.cron.outputs.failures > 0
-              shell: bash
-              # Must be inline, since context expressions are used.
-              # Ref: https://docs.github.com/en/free-pro-team@latest/actions/reference/context-and-expression-syntax-for-github-actions
-              run: |
-                set -eo pipefail
-                (
-                echo "Detected one or more Cirrus-CI cron-triggered jobs have failed recently:"
-                echo ""
-
-                while read -r NAME BID; do
-                    echo "Cron build '$NAME' Failed: https://cirrus-ci.com/build/$BID"
-                done < "$NAME_ID_FILEPATH"
-
-                echo ""
-                echo "# Source: ${{ github.workflow }} workflow on ${{ github.repository }}."
-                # Separate content from sendgrid.com automatic footer.
-                echo ""
-                echo ""
-                ) > ./artifacts/email_body.txt
-
-            - if: steps.cron.outputs.failures > 0
-              name: Send failure notification e-mail
-              # Ref: https://github.com/dawidd6/action-send-mail
-              uses: dawidd6/action-send-mail@a80d851dc950256421f1d1d735a2dc1ef314ac8f # v2.2.2
-              with:
-                server_address: ${{secrets.ACTION_MAIL_SERVER}}
-                server_port: 465
-                username: ${{secrets.ACTION_MAIL_USERNAME}}
-                password: ${{secrets.ACTION_MAIL_PASSWORD}}
-                subject: Cirrus-CI cron build failures on ${{github.repository}}
-                to: ${{env.RCPTCSV}}
-                from: ${{secrets.ACTION_MAIL_SENDER}}
-                body: file://./artifacts/email_body.txt
-
-            - if: always()
-              uses: actions/upload-artifact@82c141cc518b40d92cc801eee768e7aafc9c2fa2 # v2
-              with:
-                  name: ${{ github.job }}_artifacts
-                  path: artifacts/*
-
-            - if: failure()
-              name: Send error notification e-mail
-              uses: dawidd6/action-send-mail@a80d851dc950256421f1d1d735a2dc1ef314ac8f # v2.2.2
-              with:
-                server_address: ${{secrets.ACTION_MAIL_SERVER}}
-                server_port: 465
-                username: ${{secrets.ACTION_MAIL_USERNAME}}
-                password: ${{secrets.ACTION_MAIL_PASSWORD}}
-                subject: Github workflow error on ${{github.repository}}
-                to: ${{env.RCPTCSV}}
-                from: ${{secrets.ACTION_MAIL_SENDER}}
-                body: "Job failed: https://github.com/${{github.repository}}/actions/runs/${{github.run_id}}"
+  # Ref: https://docs.github.com/en/actions/using-workflows/reusing-workflows
+  call_cron_failures:
+    uses: containers/podman/.github/workflows/check_cirrus_cron.yml@main
+    secrets: inherit

.github/workflows/discussion_lock.yml

@@ -0,0 +1,20 @@
+---
+
+# See also:
+# https://github.com/containers/podman/blob/main/.github/workflows/discussion_lock.yml
+
+on:
+  schedule:
+    - cron:  '0 0 * * *'
+  # Debug: Allow triggering job manually in github-actions WebUI
+  workflow_dispatch: {}
+
+jobs:
+  # Ref: https://docs.github.com/en/actions/using-workflows/reusing-workflows
+  closed_issue_discussion_lock:
+    uses: containers/podman/.github/workflows/discussion_lock.yml@main
+    secrets: inherit
+    permissions:
+      contents: read
+      issues: write
+      pull-requests: write

.github/workflows/rerun_cirrus_cron.yml

@@ -0,0 +1,19 @@
+---
+
+# See also: https://github.com/containers/podman/blob/main/.github/workflows/rerun_cirrus_cron.yml
+
+on:
+  # Note: This only applies to the default branch.
+  schedule:
+    # N/B: This should correspond to a period slightly after
+    # the last job finishes running.  See job defs. at:
+    # https://cirrus-ci.com/settings/repository/6706677464432640
+    - cron:  '01 01 * * 1-5'
+  # Debug: Allow triggering job manually in github-actions WebUI
+  workflow_dispatch: {}
+
+jobs:
+  # Ref: https://docs.github.com/en/actions/using-workflows/reusing-workflows
+  call_cron_rerun:
+    uses: containers/podman/.github/workflows/rerun_cirrus_cron.yml@main
+    secrets: inherit

.github/workflows/stale.yml

@@ -17,7 +17,7 @@ jobs:
       pull-requests: write  # for actions/stale to close stale PRs
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/stale@98ed4cb500039dbcccf4bd9bedada4d0187f2757 # v3
+    - uses: actions/stale@v8
       with:
         repo-token: ${{ secrets.GITHUB_TOKEN }}
         stale-issue-message: 'A friendly reminder that this issue had no activity for 30 days.'

.golangci.yml

@@ -0,0 +1,3 @@
+---
+run:
+  timeout: 5m

.packit.yaml

@@ -0,0 +1,59 @@
+---
+# See the documentation for more information:
+# https://packit.dev/docs/configuration/
+
+# NOTE: The Packit copr_build tasks help to check if every commit builds on
+# supported Fedora and CentOS Stream arches.
+# They do not block the current Cirrus-based workflow.
+
+specfile_path: rpm/skopeo.spec
+upstream_tag_template: v{version}
+
+srpm_build_deps:
+  - make
+
+jobs:
+  - job: copr_build
+    trigger: pull_request
+    notifications:
+      failure_comment:
+        message: "Ephemeral COPR build failed. @containers/packit-build please check."
+    enable_net: true
+    targets:
+      - fedora-all-x86_64
+      - fedora-all-aarch64
+      - fedora-eln-x86_64
+      - fedora-eln-aarch64
+      - centos-stream+epel-next-8-x86_64
+      - centos-stream+epel-next-8-aarch64
+      - centos-stream+epel-next-9-x86_64
+      - centos-stream+epel-next-9-aarch64
+    additional_repos:
+      - "copr://rhcontainerbot/podman-next"
+
+  # Run on commit to main branch
+  - job: copr_build
+    trigger: commit
+    notifications:
+      failure_comment:
+        message: "podman-next COPR build failed. @containers/packit-build please check."
+    branch: main
+    owner: rhcontainerbot
+    project: podman-next
+    enable_net: true
+
+  - job: propose_downstream
+    trigger: release
+    update_release: false
+    dist_git_branches:
+      - fedora-all
+
+  - job: koji_build
+    trigger: commit
+    dist_git_branches:
+      - fedora-all
+
+  - job: bodhi_update
+    trigger: commit
+    dist_git_branches:
+      - fedora-branched # rawhide updates are created automatically

Makefile

@@ -24,21 +24,24 @@ GOBIN := $(shell $(GO) env GOBIN)
 GOOS ?= $(shell go env GOOS)
 GOARCH ?= $(shell go env GOARCH)
 
+# N/B: This value is managed by Renovate, manual changes are
+# possible, as long as they don't disturb the formatting
+# (i.e. DO NOT ADD A 'v' prefix!)
+GOLANGCI_LINT_VERSION := 1.55.2
+
 ifeq ($(GOBIN),)
 GOBIN := $(GOPATH)/bin
 endif
 
-# Multiple scripts are sensitive to this value, make sure it's exported/available
-# N/B: Need to use 'command -v' here for compatibility with MacOS.
-export CONTAINER_RUNTIME ?= $(if $(shell command -v podman),podman,docker)
-GOMD2MAN ?= $(if $(shell command -v go-md2man),go-md2man,$(GOBIN)/go-md2man)
-
-# Go module support: set `-mod=vendor` to use the vendored sources.
-# See also hack/make.sh.
-ifeq ($(shell go help mod >/dev/null 2>&1 && echo true), true)
-  GO:=GO111MODULE=on $(GO)
-  MOD_VENDOR=-mod=vendor
-endif
+# Scripts may also use CONTAINER_RUNTIME, so we need to export it.
+# Note possibly non-obvious aspects of this:
+# - We need to use 'command -v' here, not 'which', for compatibility with MacOS.
+# - GNU Make 4.2.1 (included in Ubuntu 20.04) incorrectly tries to avoid invoking
+#   a shell, and fails because there is no /usr/bin/command. The trailing ';' in
+#   $(shell … ;) defeats that heuristic (recommended in
+#   https://savannah.gnu.org/bugs/index.php?57625 ).
+export CONTAINER_RUNTIME ?= $(if $(shell command -v podman ;),podman,docker)
+GOMD2MAN ?= $(if $(shell command -v go-md2man ;),go-md2man,$(GOBIN)/go-md2man)
 
 ifeq ($(DEBUG), 1)
   override GOGCFLAGS += -N -l
@@ -50,20 +53,12 @@ ifeq ($(GOOS), linux)
   endif
 endif
 
-GIT_BRANCH := $(shell git rev-parse --abbrev-ref HEAD 2>/dev/null)
-
 # If $TESTFLAGS is set, it is passed as extra arguments to 'go test'.
-# You can increase test output verbosity with the option '-test.vv'.
-# You can select certain tests to run, with `-test.run <regex>` for example:
+# You can select certain tests to run, with `-run <regex>` for example:
 #
-#     make test-unit TESTFLAGS='-test.run ^TestManifestDigest$'
-#
-# For integration test, we use [gocheck](https://labix.org/gocheck).
-# You can increase test output verbosity with the option '-check.vv'.
-# You can limit test selection with `-check.f <regex>`, for example:
-#
-#     make test-integration TESTFLAGS='-check.f CopySuite.TestCopy.*'
-export TESTFLAGS ?= -v -check.v -test.timeout=15m
+#     make test-unit TESTFLAGS='-run ^TestManifestDigest$'
+#     make test-integration TESTFLAGS='-run copySuite.TestCopy.*'
+export TESTFLAGS ?= -timeout=15m
 
 # This is assumed to be set non-empty when operating inside a CI/automation environment
 CI ?=
@@ -87,7 +82,7 @@ endif
 CONTAINER_GOSRC = /src/github.com/containers/skopeo
 CONTAINER_RUN ?= $(CONTAINER_CMD) --security-opt label=disable -v $(CURDIR):$(CONTAINER_GOSRC) -w $(CONTAINER_GOSRC) $(SKOPEO_CIDEV_CONTAINER_FQIN)
 
-GIT_COMMIT := $(shell git rev-parse HEAD 2> /dev/null || true)
+GIT_COMMIT := $(shell GIT_CEILING_DIRECTORIES=$$(cd ..; pwd) git rev-parse HEAD 2> /dev/null || true)
 
 EXTRA_LDFLAGS ?=
 SKOPEO_LDFLAGS := -ldflags '-X main.gitCommit=${GIT_COMMIT} $(EXTRA_LDFLAGS)'
@@ -122,6 +117,7 @@ help:
 	@echo " * 'install' - Install binaries and documents to system locations"
 	@echo " * 'binary' - Build skopeo with a container"
 	@echo " * 'bin/skopeo' - Build skopeo locally"
+	@echo " * 'bin/skopeo.OS.ARCH' - Build skopeo for specific OS and ARCH"
 	@echo " * 'test-unit' - Execute unit tests"
 	@echo " * 'test-integration' - Execute integration tests"
 	@echo " * 'validate' - Verify whether there is no conflict and all Go source files have been formatted, linted and vetted"
@@ -136,9 +132,9 @@ binary: cmd/skopeo
 # Build w/o using containers
 .PHONY: bin/skopeo
 bin/skopeo:
-	$(GO) build $(MOD_VENDOR) ${GO_DYN_FLAGS} ${SKOPEO_LDFLAGS} -gcflags "$(GOGCFLAGS)" -tags "$(BUILDTAGS)" -o $@ ./cmd/skopeo
+	$(GO) build ${GO_DYN_FLAGS} ${SKOPEO_LDFLAGS} -gcflags "$(GOGCFLAGS)" -tags "$(BUILDTAGS)" -o $@ ./cmd/skopeo
 bin/skopeo.%:
-	GOOS=$(word 2,$(subst ., ,$@)) GOARCH=$(word 3,$(subst ., ,$@)) $(GO) build $(MOD_VENDOR) ${SKOPEO_LDFLAGS} -tags "containers_image_openpgp $(BUILDTAGS)" -o $@ ./cmd/skopeo
+	GOOS=$(word 2,$(subst ., ,$@)) GOARCH=$(word 3,$(subst ., ,$@)) $(GO) build ${SKOPEO_LDFLAGS} -tags "containers_image_openpgp $(BUILDTAGS)" -o $@ ./cmd/skopeo
 local-cross: bin/skopeo.darwin.amd64 bin/skopeo.linux.arm bin/skopeo.linux.arm64 bin/skopeo.windows.386.exe bin/skopeo.windows.amd64.exe
 
 $(MANPAGES): %: %.md
@@ -191,18 +187,27 @@ install-completions: completions
 shell:
 	$(CONTAINER_RUN) bash
 
+tools:
+	if [ ! -x "$(GOBIN)/golangci-lint" ]; then \
+		curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s -- -b $(GOBIN) v$(GOLANGCI_LINT_VERSION) ; \
+	fi
+
 check: validate test-unit test-integration test-system
 
 test-integration:
-	$(CONTAINER_RUN) $(MAKE) test-integration-local
+# This is intended to be equal to $(CONTAINER_RUN), but with --cap-add=cap_mknod.
+# --cap-add=cap_mknod is important to allow skopeo to use containers-storage: directly as it exists in the callers’ environment, without
+# creating a nested user namespace (which requires /etc/subuid and /etc/subgid to be set up)
+	$(CONTAINER_CMD) --security-opt label=disable --cap-add=cap_mknod -v $(CURDIR):$(CONTAINER_GOSRC) -w $(CONTAINER_GOSRC) $(SKOPEO_CIDEV_CONTAINER_FQIN) \
+		$(MAKE) test-integration-local
 
 
 # Intended for CI, assumed to be running in quay.io/libpod/skopeo_cidev container.
 test-integration-local: bin/skopeo
-	hack/make.sh test-integration
+	hack/warn-destructive-tests.sh
+	hack/test-integration.sh
 
 # complicated set of options needed to run podman-in-podman
-# TODO: The $(RM) command will likely fail w/o `podman unshare`
 test-system:
 	DTEMP=$(shell mktemp -d --tmpdir=/var/tmp podman-tmp.XXXXXX); \
 	$(CONTAINER_CMD) --privileged \
@@ -211,12 +216,13 @@ test-system:
 		"$(SKOPEO_CIDEV_CONTAINER_FQIN)" \
 			$(MAKE) test-system-local; \
 	rc=$$?; \
-	-$(RM) -rf $$DTEMP; \
+	$(CONTAINER_RUNTIME) unshare rm -rf $$DTEMP; # This probably doesn't work with Docker, oh well, better than nothing... \
 	exit $$rc
 
 # Intended for CI, assumed to already be running in quay.io/libpod/skopeo_cidev container.
 test-system-local: bin/skopeo
-	hack/make.sh test-system
+	hack/warn-destructive-tests.sh
+	hack/test-system.sh
 
 test-unit:
 	# Just call (make test unit-local) here instead of worrying about environment differences
@@ -230,19 +236,22 @@ test-all-local: validate-local validate-docs test-unit-local
 
 .PHONY: validate-local
 validate-local:
-	BUILDTAGS="${BUILDTAGS}" hack/make.sh validate-git-marks validate-gofmt validate-lint validate-vet
+	hack/validate-git-marks.sh
+	hack/validate-gofmt.sh
+	GOBIN=$(GOBIN) hack/validate-lint.sh
+	BUILDTAGS="${BUILDTAGS}" hack/validate-vet.sh
 
 # This invokes bin/skopeo, hence cannot be run as part of validate-local
 .PHONY: validate-docs
-validate-docs:
+validate-docs: bin/skopeo
 	hack/man-page-checker
 	hack/xref-helpmsgs-manpages
 
-test-unit-local: bin/skopeo
-	$(GO) test $(MOD_VENDOR) -tags "$(BUILDTAGS)" $$($(GO) list $(MOD_VENDOR) -tags "$(BUILDTAGS)" -e ./... | grep -v '^github\.com/containers/skopeo/\(integration\|vendor/.*\)$$')
+test-unit-local:
+	$(GO) test -tags "$(BUILDTAGS)" $$($(GO) list -tags "$(BUILDTAGS)" -e ./... | grep -v '^github\.com/containers/skopeo/\(integration\|vendor/.*\)$$')
 
 vendor:
-	$(GO) mod tidy -compat=1.17
+	$(GO) mod tidy
 	$(GO) mod vendor
 	$(GO) mod verify
 

README.md

@@ -1,7 +1,4 @@
-skopeo [![Build Status](https://travis-ci.org/containers/skopeo.svg?branch=master)](https://travis-ci.org/containers/skopeo)
-=
-
-<img src="https://cdn.rawgit.com/containers/skopeo/master/docs/skopeo.svg" width="250">
+<img src="https://cdn.rawgit.com/containers/skopeo/main/docs/skopeo.svg" width="250" alt="Skopeo">
 
 ----
 
@@ -42,6 +39,12 @@ Skopeo works with API V2 container image registries such as [docker.io](https://
  * oci:path:tag
          An image tag in a directory compliant with "Open Container Image Layout Specification" at path.
 
+[Obtaining skopeo](./install.md)
+-
+
+For a detailed description how to install or build skopeo, see
+[install.md](./install.md).
+
 ## Inspecting a repository
 `skopeo` is able to _inspect_ a repository on a container registry and fetch images layers.
 The _inspect_ command fetches the repository's manifest and it is able to show you a `docker inspect`-like
@@ -56,29 +59,37 @@ Examples:
 $ skopeo inspect docker://registry.fedoraproject.org/fedora:latest
 {
     "Name": "registry.fedoraproject.org/fedora",
-    "Digest": "sha256:655721ff613ee766a4126cb5e0d5ae81598e1b0c3bcf7017c36c4d72cb092fe9",
+    "Digest": "sha256:0f65bee641e821f8118acafb44c2f8fe30c2fc6b9a2b3729c0660376391aa117",
     "RepoTags": [
-        "24",
-        "25",
-        "26-modular",
-	...
+        "34-aarch64",
+        "34",
+        "latest",
+        ...
     ],
-    "Created": "2020-04-29T06:48:16Z",
+    "Created": "2022-11-24T13:54:18Z",
     "DockerVersion": "1.10.1",
     "Labels": {
         "license": "MIT",
         "name": "fedora",
         "vendor": "Fedora Project",
-        "version": "32"
+        "version": "37"
     },
     "Architecture": "amd64",
     "Os": "linux",
     "Layers": [
-        "sha256:3088721d7dbf674fc0be64cd3cf00c25aab921cacf35fa0e7b1578500a3e1653"
+        "sha256:2a0fc6bf62e155737f0ace6142ee686f3c471c1aab4241dc3128904db46288f0"
+    ],
+    "LayersData": [
+        {
+            "MIMEType": "application/vnd.docker.image.rootfs.diff.tar.gzip",
+            "Digest": "sha256:2a0fc6bf62e155737f0ace6142ee686f3c471c1aab4241dc3128904db46288f0",
+            "Size": 71355009,
+            "Annotations": null
+        }
     ],
     "Env": [
-        "DISTTAG=f32container",
-        "FGC=f32",
+        "DISTTAG=f37container",
+        "FGC=f37",
         "container=oci"
     ]
 }
@@ -184,12 +195,6 @@ $ skopeo inspect --creds=testuser:testpassword docker://myregistrydomain.com:500
 $ skopeo copy --src-creds=testuser:testpassword docker://myregistrydomain.com:5000/private oci:local_oci_image
 ```
 
-[Obtaining skopeo](./install.md)
--
-
-For a detailed description how to install or build skopeo, see
-[install.md](./install.md).
-
 Contributing
 -
 
@@ -200,6 +205,7 @@ Please read the [contribution guide](CONTRIBUTING.md) if you want to collaborate
 | -------------------------------------------------- | ---------------------------------------------------------------------------------------------|
 | [skopeo-copy(1)](/docs/skopeo-copy.1.md)           | Copy an image (manifest, filesystem layers, signatures) from one location to another.        |
 | [skopeo-delete(1)](/docs/skopeo-delete.1.md)       | Mark the image-name for later deletion by the registry's garbage collector.                                                                |
+| [skopeo-generate-sigstore-key(1)](/docs/skopeo-generate-sigstore-key.1.md)    | Generate a sigstore public/private key pair.  |
 | [skopeo-inspect(1)](/docs/skopeo-inspect.1.md)     | Return  low-level  information about image-name in a registry.                                |
 | [skopeo-list-tags(1)](/docs/skopeo-list-tags.1.md) | Return a list of tags for the transport-specific image repository.                               |
 | [skopeo-login(1)](/docs/skopeo-login.1.md)         | Login to a container registry.                                                               |
@@ -207,7 +213,7 @@ Please read the [contribution guide](CONTRIBUTING.md) if you want to collaborate
 | [skopeo-manifest-digest(1)](/docs/skopeo-manifest-digest.1.md)    | Compute a manifest digest for a manifest-file and write it to standard output.   |
 | [skopeo-standalone-sign(1)](/docs/skopeo-standalone-sign.1.md)    | Debugging tool - Publish and sign an image in one step.                                                         |
 | [skopeo-standalone-verify(1)](/docs/skopeo-standalone-verify.1.md)| Verify an image signature.                                                    |
-| [skopeo-sync(1)](/docs/skopeo-sync.1.md)           | Synchronize images between container registries and local directories.                       |
+| [skopeo-sync(1)](/docs/skopeo-sync.1.md)           | Synchronize images between registry repositories and local directories.                      |
 
 License
 -

cmd/skopeo/copy.go

@@ -13,6 +13,8 @@ import (
 	"github.com/containers/image/v5/docker/reference"
 	"github.com/containers/image/v5/manifest"
 	"github.com/containers/image/v5/pkg/cli"
+	"github.com/containers/image/v5/pkg/cli/sigstore"
+	"github.com/containers/image/v5/signature/signer"
 	"github.com/containers/image/v5/transports"
 	"github.com/containers/image/v5/transports/alltransports"
 	encconfig "github.com/containers/ocicrypt/config"
@@ -29,6 +31,7 @@ type copyOptions struct {
 	additionalTags           []string                  // For docker-archive: destinations, in addition to the name:tag specified as destination, also add these
 	removeSignatures         bool                      // Do not copy signatures from the source image
 	signByFingerprint        string                    // Sign the image using a GPG key with the specified fingerprint
+	signBySigstoreParamFile  string                    // Sign the image using a sigstore signature per configuration in a param file
 	signBySigstorePrivateKey string                    // Sign the image using a sigstore private key
 	signPassphraseFile       string                    // Path pointing to a passphrase file when signing (for either signature format, but only one of them)
 	signIdentity             string                    // Identity of the signed image, must be a fully specified docker reference
@@ -83,6 +86,7 @@ See skopeo(1) section "IMAGE NAMES" for the expected format
 	flags.BoolVar(&opts.preserveDigests, "preserve-digests", false, "Preserve digests of images and lists")
 	flags.BoolVar(&opts.removeSignatures, "remove-signatures", false, "Do not copy signatures from SOURCE-IMAGE")
 	flags.StringVar(&opts.signByFingerprint, "sign-by", "", "Sign the image using a GPG key with the specified `FINGERPRINT`")
+	flags.StringVar(&opts.signBySigstoreParamFile, "sign-by-sigstore", "", "Sign the image using a sigstore parameter file at `PATH`")
 	flags.StringVar(&opts.signBySigstorePrivateKey, "sign-by-sigstore-private-key", "", "Sign the image using a sigstore private key at `PATH`")
 	flags.StringVar(&opts.signPassphraseFile, "sign-passphrase-file", "", "Read a passphrase for signing an image from `PATH`")
 	flags.StringVar(&opts.signIdentity, "sign-identity", "", "Identity of signed image, must be a fully specified docker reference. Defaults to the target docker reference.")
@@ -252,6 +256,22 @@ func (opts *copyOptions) run(args []string, stdout io.Writer) (retErr error) {
 		passphrase = p
 	} // opts.signByFingerprint triggers a GPG-agent passphrase prompt, possibly using a more secure channel, so we usually shouldn’t prompt ourselves if no passphrase was explicitly provided.
 
+	var signers []*signer.Signer
+	if opts.signBySigstoreParamFile != "" {
+		signer, err := sigstore.NewSignerFromParameterFile(opts.signBySigstoreParamFile, &sigstore.Options{
+			PrivateKeyPassphrasePrompt: func(keyFile string) (string, error) {
+				return promptForPassphrase(keyFile, os.Stdin, os.Stdout)
+			},
+			Stdin:  os.Stdin,
+			Stdout: stdout,
+		})
+		if err != nil {
+			return fmt.Errorf("Error using --sign-by-sigstore: %w", err)
+		}
+		defer signer.Close()
+		signers = append(signers, signer)
+	}
+
 	var signIdentity reference.Named = nil
 	if opts.signIdentity != "" {
 		signIdentity, err = reference.ParseNamed(opts.signIdentity)
@@ -260,9 +280,12 @@ func (opts *copyOptions) run(args []string, stdout io.Writer) (retErr error) {
 		}
 	}
 
+	opts.destImage.warnAboutIneffectiveOptions(destRef.Transport())
+
 	return retry.IfNecessary(ctx, func() error {
 		manifestBytes, err := copy.Image(ctx, policyContext, destRef, srcRef, &copy.Options{
 			RemoveSignatures:                 opts.removeSignatures,
+			Signers:                          signers,
 			SignBy:                           opts.signByFingerprint,
 			SignPassphrase:                   passphrase,
 			SignBySigstorePrivateKeyFile:     opts.signBySigstorePrivateKey,

cmd/skopeo/generate_sigstore_key.go

@@ -0,0 +1,90 @@
+package main
+
+import (
+	"errors"
+	"fmt"
+	"io"
+	"io/fs"
+	"os"
+
+	"github.com/containers/image/v5/pkg/cli"
+	"github.com/containers/image/v5/signature/sigstore"
+	"github.com/spf13/cobra"
+)
+
+type generateSigstoreKeyOptions struct {
+	outputPrefix   string
+	passphraseFile string
+}
+
+func generateSigstoreKeyCmd() *cobra.Command {
+	var opts generateSigstoreKeyOptions
+	cmd := &cobra.Command{
+		Use:     "generate-sigstore-key [command options] --output-prefix PREFIX",
+		Short:   "Generate a sigstore public/private key pair",
+		RunE:    commandAction(opts.run),
+		Example: "skopeo generate-sigstore-key --output-prefix my-key",
+	}
+	adjustUsage(cmd)
+	flags := cmd.Flags()
+	flags.StringVar(&opts.outputPrefix, "output-prefix", "", "Write the keys to `PREFIX`.pub and `PREFIX`.private")
+	flags.StringVar(&opts.passphraseFile, "passphrase-file", "", "Read a passphrase for the private key from `PATH`")
+	return cmd
+}
+
+// ensurePathDoesNotExist verifies that path does not refer to an existing file,
+// and returns an error if so.
+func ensurePathDoesNotExist(path string) error {
+	switch _, err := os.Stat(path); {
+	case err == nil:
+		return fmt.Errorf("Refusing to overwrite existing %q", path)
+	case errors.Is(err, fs.ErrNotExist):
+		return nil
+	default:
+		return fmt.Errorf("Error checking existence of %q: %w", path, err)
+	}
+}
+
+func (opts *generateSigstoreKeyOptions) run(args []string, stdout io.Writer) error {
+	if len(args) != 0 || opts.outputPrefix == "" {
+		return errors.New("Usage: generate-sigstore-key --output-prefix PREFIX")
+	}
+
+	pubKeyPath := opts.outputPrefix + ".pub"
+	privateKeyPath := opts.outputPrefix + ".private"
+	if err := ensurePathDoesNotExist(pubKeyPath); err != nil {
+		return err
+	}
+	if err := ensurePathDoesNotExist(privateKeyPath); err != nil {
+		return err
+	}
+
+	var passphrase string
+	if opts.passphraseFile != "" {
+		p, err := cli.ReadPassphraseFile(opts.passphraseFile)
+		if err != nil {
+			return err
+		}
+		passphrase = p
+	} else {
+		p, err := promptForPassphrase(privateKeyPath, os.Stdin, os.Stdout)
+		if err != nil {
+			return err
+		}
+		passphrase = p
+	}
+
+	keys, err := sigstore.GenerateKeyPair([]byte(passphrase))
+	if err != nil {
+		return fmt.Errorf("Error generating key pair: %w", err)
+	}
+
+	if err := os.WriteFile(privateKeyPath, keys.PrivateKey, 0600); err != nil {
+		return fmt.Errorf("Error writing private key to %q: %w", privateKeyPath, err)
+	}
+	if err := os.WriteFile(pubKeyPath, keys.PublicKey, 0644); err != nil {
+		return fmt.Errorf("Error writing private key to %q: %w", pubKeyPath, err)
+	}
+	fmt.Fprintf(stdout, "Key written to %q and %q", privateKeyPath, pubKeyPath)
+	return nil
+}

cmd/skopeo/generate_sigstore_key_test.go

@@ -0,0 +1,79 @@
+package main
+
+import (
+	"os"
+	"path/filepath"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestGenerateSigstoreKey(t *testing.T) {
+	// Invalid command-line arguments
+	for _, args := range [][]string{
+		{},
+		{"--output-prefix", "foo", "a1"},
+	} {
+		out, err := runSkopeo(append([]string{"generate-sigstore-key"}, args...)...)
+		assertTestFailed(t, out, err, "Usage")
+	}
+
+	// One of the destination files already exists
+	outputSuffixes := []string{".pub", ".private"}
+	for _, suffix := range outputSuffixes {
+		dir := t.TempDir()
+		prefix := filepath.Join(dir, "prefix")
+		err := os.WriteFile(prefix+suffix, []byte{}, 0600)
+		require.NoError(t, err)
+		out, err := runSkopeo("generate-sigstore-key",
+			"--output-prefix", prefix, "--passphrase-file", "/dev/null",
+		)
+		assertTestFailed(t, out, err, "Refusing to overwrite")
+	}
+
+	// One of the destinations is inaccessible (simulate by a symlink that tries to
+	// traverse a non-directory)
+	for _, suffix := range outputSuffixes {
+		dir := t.TempDir()
+		nonDirectory := filepath.Join(dir, "nondirectory")
+		err := os.WriteFile(nonDirectory, []byte{}, 0600)
+		require.NoError(t, err)
+		prefix := filepath.Join(dir, "prefix")
+		err = os.Symlink(filepath.Join(nonDirectory, "unaccessible"), prefix+suffix)
+		require.NoError(t, err)
+		out, err := runSkopeo("generate-sigstore-key",
+			"--output-prefix", prefix, "--passphrase-file", "/dev/null",
+		)
+		assertTestFailed(t, out, err, prefix+suffix) // + an OS-specific error message
+	}
+	destDir := t.TempDir()
+	// Error reading passphrase
+	out, err := runSkopeo("generate-sigstore-key",
+		"--output-prefix", filepath.Join(destDir, "prefix"),
+		"--passphrase-file", filepath.Join(destDir, "this-does-not-exist"),
+	)
+	assertTestFailed(t, out, err, "this-does-not-exist")
+
+	// (The interactive passphrase prompting is not yet tested)
+
+	// Error writing outputs is untested: when unit tests run as root, we can’t use permissions on a directory to cause write failures,
+	// with the --output-prefix mechanism, and refusing to even start writing to pre-exisiting files, directories are the only mechanism
+	// we have to trigger a write failure.
+
+	// Success
+	// Just a smoke-test, usability of the keys is tested in the generate implementation.
+	dir := t.TempDir()
+	prefix := filepath.Join(dir, "prefix")
+	passphraseFile := filepath.Join(dir, "passphrase")
+	err = os.WriteFile(passphraseFile, []byte("some passphrase"), 0600)
+	require.NoError(t, err)
+	out, err = runSkopeo("generate-sigstore-key",
+		"--output-prefix", prefix, "--passphrase-file", passphraseFile,
+	)
+	assert.NoError(t, err)
+	for _, suffix := range outputSuffixes {
+		assert.Contains(t, out, prefix+suffix)
+	}
+
+}

cmd/skopeo/inspect.go

@@ -5,10 +5,7 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"os"
 	"strings"
-	"text/tabwriter"
-	"text/template"
 
 	"github.com/containers/common/pkg/report"
 	"github.com/containers/common/pkg/retry"
@@ -18,6 +15,7 @@ import (
 	"github.com/containers/image/v5/transports"
 	"github.com/containers/image/v5/types"
 	"github.com/containers/skopeo/cmd/skopeo/inspect"
+	"github.com/docker/distribution/registry/api/errcode"
 	v1 "github.com/opencontainers/image-spec/specs-go/v1"
 	"github.com/sirupsen/logrus"
 	"github.com/spf13/cobra"
@@ -53,8 +51,8 @@ See skopeo(1) section "IMAGE NAMES" for the expected format
 `, strings.Join(transports.ListNames(), ", ")),
 		RunE: commandAction(opts.run),
 		Example: `skopeo inspect docker://registry.fedoraproject.org/fedora
-  skopeo inspect --config docker://docker.io/alpine
-  skopeo inspect  --format "Name: {{.Name}} Digest: {{.Digest}}" docker://registry.access.redhat.com/ubi8`,
+skopeo inspect --config docker://docker.io/alpine
+skopeo inspect --format "Name: {{.Name}} Digest: {{.Digest}}" docker://registry.access.redhat.com/ubi8`,
 		ValidArgsFunction: autocompleteSupportedTransports,
 	}
 	adjustUsage(cmd)
@@ -74,7 +72,6 @@ func (opts *inspectOptions) run(args []string, stdout io.Writer) (retErr error)
 		rawManifest []byte
 		src         types.ImageSource
 		imgInspect  *types.ImageInspectInfo
-		data        []interface{}
 	)
 	ctx, cancel := opts.global.commandTimeoutContext()
 	defer cancel()
@@ -151,18 +148,7 @@ func (opts *inspectOptions) run(args []string, stdout io.Writer) (retErr error)
 		}, opts.retryOpts); err != nil {
 			return fmt.Errorf("Error reading OCI-formatted configuration data: %w", err)
 		}
-		if report.IsJSON(opts.format) || opts.format == "" {
-			var out []byte
-			out, err = json.MarshalIndent(config, "", "    ")
-			if err == nil {
-				fmt.Fprintf(stdout, "%s\n", string(out))
-			}
-		} else {
-			row := "{{range . }}" + report.NormalizeFormat(opts.format) + "{{end}}"
-			data = append(data, config)
-			err = printTmpl(row, data)
-		}
-		if err != nil {
+		if err := opts.writeOutput(stdout, config); err != nil {
 			return fmt.Errorf("Error writing OCI-formatted configuration data to standard output: %w", err)
 		}
 		return nil
@@ -186,6 +172,7 @@ func (opts *inspectOptions) run(args []string, stdout io.Writer) (retErr error)
 		Architecture:  imgInspect.Architecture,
 		Os:            imgInspect.Os,
 		Layers:        imgInspect.Layers,
+		LayersData:    imgInspect.LayersData,
 		Env:           imgInspect.Env,
 	}
 	outputData.Digest, err = manifest.Digest(rawManifest)
@@ -202,34 +189,48 @@ func (opts *inspectOptions) run(args []string, stdout io.Writer) (retErr error)
 		}
 		outputData.RepoTags, err = docker.GetRepositoryTags(ctx, sys, img.Reference())
 		if err != nil {
-			// some registries may decide to block the "list all tags" endpoint
-			// gracefully allow the inspect to continue in this case. Currently
-			// the IBM Bluemix container registry has this restriction.
-			// In addition, AWS ECR rejects it with 403 (Forbidden) if the "ecr:ListImages"
-			// action is not allowed.
-			if !strings.Contains(err.Error(), "401") && !strings.Contains(err.Error(), "403") {
+			// Some registries may decide to block the "list all tags" endpoint;
+			// gracefully allow the inspect to continue in this case:
+			fatalFailure := true
+			// - AWS ECR rejects it if the "ecr:ListImages" action is not allowed.
+			//   https://github.com/containers/skopeo/issues/726
+			var ec errcode.ErrorCoder
+			if ok := errors.As(err, &ec); ok && ec.ErrorCode() == errcode.ErrorCodeDenied {
+				fatalFailure = false
+			}
+			// - public.ecr.aws does not implement the endpoint at all, and fails with 404:
+			//   https://github.com/containers/skopeo/issues/1230
+			//   This is actually "code":"NOT_FOUND", and the parser doesn’t preserve that.
+			//   So, also check the error text.
+			if ok := errors.As(err, &ec); ok && ec.ErrorCode() == errcode.ErrorCodeUnknown {
+				var e errcode.Error
+				if ok := errors.As(err, &e); ok && e.Code == errcode.ErrorCodeUnknown && e.Message == "404 page not found" {
+					fatalFailure = false
+				}
+			}
+			if fatalFailure {
 				return fmt.Errorf("Error determining repository tags: %w", err)
 			}
 			logrus.Warnf("Registry disallows tag list retrieval; skipping")
 		}
 	}
+	return opts.writeOutput(stdout, outputData)
+}
+
+// writeOutput writes data depending on opts.format to stdout
+func (opts *inspectOptions) writeOutput(stdout io.Writer, data any) error {
 	if report.IsJSON(opts.format) || opts.format == "" {
-		out, err := json.MarshalIndent(outputData, "", "    ")
+		out, err := json.MarshalIndent(data, "", "    ")
 		if err == nil {
 			fmt.Fprintf(stdout, "%s\n", string(out))
 		}
 		return err
 	}
-	row := "{{range . }}" + report.NormalizeFormat(opts.format) + "{{end}}"
-	data = append(data, outputData)
-	return printTmpl(row, data)
-}
 
-func printTmpl(row string, data []interface{}) error {
-	t, err := template.New("skopeo inspect").Parse(row)
+	rpt, err := report.New(stdout, "skopeo inspect").Parse(report.OriginUser, opts.format)
 	if err != nil {
 		return err
 	}
-	w := tabwriter.NewWriter(os.Stdout, 8, 2, 2, ' ', 0)
-	return t.Execute(w, data)
+	defer rpt.Flush()
+	return rpt.Execute([]any{data})
 }

cmd/skopeo/inspect/output.go

@@ -3,6 +3,7 @@ package inspect
 import (
 	"time"
 
+	"github.com/containers/image/v5/types"
 	digest "github.com/opencontainers/go-digest"
 )
 
@@ -19,5 +20,6 @@ type Output struct {
 	Architecture  string
 	Os            string
 	Layers        []string
+	LayersData    []types.ImageInspectLayer
 	Env           []string
 }

cmd/skopeo/list_tags.go

@@ -16,6 +16,7 @@ import (
 	"github.com/containers/image/v5/transports/alltransports"
 	"github.com/containers/image/v5/types"
 	"github.com/spf13/cobra"
+	"golang.org/x/exp/maps"
 )
 
 // tagListOutput is the output format of (skopeo list-tags), primarily so that we can format it with a simple json.MarshalIndent.
@@ -37,10 +38,7 @@ var transportHandlers = map[string]func(ctx context.Context, sys *types.SystemCo
 
 // supportedTransports returns all the supported transports
 func supportedTransports(joinStr string) string {
-	res := make([]string, 0, len(transportHandlers))
-	for handlerName := range transportHandlers {
-		res = append(res, handlerName)
-	}
+	res := maps.Keys(transportHandlers)
 	sort.Strings(res)
 	return strings.Join(res, joinStr)
 }
@@ -84,12 +82,12 @@ func parseDockerRepositoryReference(refString string) (types.ImageReference, err
 		return nil, fmt.Errorf("docker: image reference %s does not start with %s://", refString, docker.Transport.Name())
 	}
 
-	parts := strings.SplitN(refString, ":", 2)
-	if len(parts) != 2 {
+	_, dockerImageName, hasColon := strings.Cut(refString, ":")
+	if !hasColon {
 		return nil, fmt.Errorf(`Invalid image name "%s", expected colon-separated transport:reference`, refString)
 	}
 
-	ref, err := reference.ParseNormalizedNamed(strings.TrimPrefix(parts[1], "//"))
+	ref, err := reference.ParseNormalizedNamed(strings.TrimPrefix(dockerImageName, "//"))
 	if err != nil {
 		return nil, err
 	}
@@ -130,7 +128,7 @@ func listDockerRepoTags(ctx context.Context, sys *types.SystemContext, opts *tag
 }
 
 // return the tagLists from a docker archive file
-func listDockerArchiveTags(ctx context.Context, sys *types.SystemContext, opts *tagsOptions, userInput string) (repositoryName string, tagListing []string, err error) {
+func listDockerArchiveTags(_ context.Context, sys *types.SystemContext, _ *tagsOptions, userInput string) (repositoryName string, tagListing []string, err error) {
 	ref, err := alltransports.ParseImageName(userInput)
 	if err != nil {
 		return

cmd/skopeo/list_tags_test.go

@@ -16,7 +16,6 @@ func TestDockerRepositoryReferenceParser(t *testing.T) {
 		{"docker://somehost.com"},          // Valid default expansion
 		{"docker://nginx"},                 // Valid default expansion
 	} {
-
 		ref, err := parseDockerRepositoryReference(test[0])
 		require.NoError(t, err)
 		expected, err := alltransports.ParseImageName(test[0])
@@ -47,7 +46,6 @@ func TestDockerRepositoryReferenceParserDrift(t *testing.T) {
 		{"docker://somehost.com", "docker.io/library/somehost.com"}, // Valid default expansion
 		{"docker://nginx", "docker.io/library/nginx"},               // Valid default expansion
 	} {
-
 		ref, err := parseDockerRepositoryReference(test[0])
 		ref2, err2 := alltransports.ParseImageName(test[0])
 

cmd/skopeo/login_test.go

@@ -0,0 +1,18 @@
+package main
+
+import (
+	"path/filepath"
+	"testing"
+)
+
+func TestLogin(t *testing.T) {
+	dir := t.TempDir()
+	authFile := filepath.Join(dir, "auth.json")
+	compatAuthFile := filepath.Join(dir, "config.json")
+
+	// Just a trivial smoke-test exercising one error-handling path.
+	// We can’t test full operation without a registry, unit tests should mostly
+	// exist in c/common/pkg/auth, not here.
+	out, err := runSkopeo("login", "--authfile", authFile, "--compat-auth-file", compatAuthFile, "example.com")
+	assertTestFailed(t, out, err, "options for paths to the credential file and to the Docker-compatible credential file can not be set simultaneously")
+}

cmd/skopeo/logout_test.go

@@ -0,0 +1,25 @@
+package main
+
+import (
+	"os"
+	"path/filepath"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestLogout(t *testing.T) {
+	dir := t.TempDir()
+	authFile := filepath.Join(dir, "auth.json")
+	compatAuthFile := filepath.Join(dir, "config.json")
+
+	// Just a trivial smoke-test exercising one error-handling path.
+	// We can’t test full operation without a registry, unit tests should mostly
+	// exist in c/common/pkg/auth, not here.
+	err := os.WriteFile(authFile, []byte("{}"), 0o700)
+	require.NoError(t, err)
+	err = os.WriteFile(compatAuthFile, []byte("{}"), 0o700)
+	require.NoError(t, err)
+	out, err := runSkopeo("logout", "--authfile", authFile, "--compat-auth-file", compatAuthFile, "example.com")
+	assertTestFailed(t, out, err, "options for paths to the credential file and to the Docker-compatible credential file can not be set simultaneously")
+}

cmd/skopeo/main.go

@@ -55,14 +55,12 @@ func createApp() (*cobra.Command, *globalOptions) {
 	opts := globalOptions{}
 
 	rootCommand := &cobra.Command{
-		Use:  "skopeo",
-		Long: "Various operations with container images and container image registries",
-		RunE: requireSubcommand,
-		PersistentPreRunE: func(cmd *cobra.Command, args []string) error {
-			return opts.before(cmd)
-		},
-		SilenceUsage:  true,
-		SilenceErrors: true,
+		Use:               "skopeo",
+		Long:              "Various operations with container images and container image registries",
+		RunE:              requireSubcommand,
+		PersistentPreRunE: opts.before,
+		SilenceUsage:      true,
+		SilenceErrors:     true,
 		// Hide the completion command which is provided by cobra
 		CompletionOptions: cobra.CompletionOptions{HiddenDefaultCmd: true},
 		// This is documented to parse "local" (non-PersistentFlags) flags of parent commands before
@@ -98,6 +96,7 @@ func createApp() (*cobra.Command, *globalOptions) {
 	rootCommand.AddCommand(
 		copyCmd(&opts),
 		deleteCmd(&opts),
+		generateSigstoreKeyCmd(),
 		inspectCmd(&opts),
 		layersCmd(&opts),
 		loginCmd(&opts),
@@ -114,7 +113,7 @@ func createApp() (*cobra.Command, *globalOptions) {
 }
 
 // before is run by the cli package for any command, before running the command-specific handler.
-func (opts *globalOptions) before(cmd *cobra.Command) error {
+func (opts *globalOptions) before(cmd *cobra.Command, args []string) error {
 	if opts.debug {
 		logrus.SetLevel(logrus.DebugLevel)
 	}

cmd/skopeo/proxy.go

@@ -73,11 +73,16 @@ import (
 
 	"github.com/containers/image/v5/image"
 	"github.com/containers/image/v5/manifest"
+	ocilayout "github.com/containers/image/v5/oci/layout"
 	"github.com/containers/image/v5/pkg/blobinfocache"
+	"github.com/containers/image/v5/transports"
 	"github.com/containers/image/v5/transports/alltransports"
 	"github.com/containers/image/v5/types"
+	dockerdistributionerrcode "github.com/docker/distribution/registry/api/errcode"
+	dockerdistributionapi "github.com/docker/distribution/registry/api/v2"
 	"github.com/opencontainers/go-digest"
 	imgspecv1 "github.com/opencontainers/image-spec/specs-go/v1"
+	"github.com/sirupsen/logrus"
 	"github.com/spf13/cobra"
 )
 
@@ -88,7 +93,10 @@ import (
 // 0.2.1: Initial version
 // 0.2.2: Added support for fetching image configuration as OCI
 // 0.2.3: Added GetFullConfig
-const protocolVersion = "0.2.3"
+// 0.2.4: Added OpenImageOptional
+// 0.2.5: Added LayerInfoJSON
+// 0.2.6: Policy Verification before pulling OCI
+const protocolVersion = "0.2.6"
 
 // maxMsgSize is the current limit on a packet size.
 // Note that all non-metadata (i.e. payload data) is sent over a pipe.
@@ -100,12 +108,15 @@ const maxMsgSize = 32 * 1024
 // integers are above this.
 const maxJSONFloat = float64(uint64(1)<<53 - 1)
 
+// sentinelImageID represents "image not found" on the wire
+const sentinelImageID = 0
+
 // request is the JSON serialization of a function call
 type request struct {
 	// Method is the name of the function
 	Method string `json:"method"`
 	// Args is the arguments (parsed inside the function)
-	Args []interface{} `json:"args"`
+	Args []any `json:"args"`
 }
 
 // reply is serialized to JSON as the return value from a function call.
@@ -113,7 +124,7 @@ type reply struct {
 	// Success is true if and only if the call succeeded.
 	Success bool `json:"success"`
 	// Value is an arbitrary value (or values, as array/map) returned from the call.
-	Value interface{} `json:"value"`
+	Value any `json:"value"`
 	// PipeID is an index into open pipes, and should be passed to FinishPipe
 	PipeID uint32 `json:"pipeid"`
 	// Error should be non-empty if Success == false
@@ -123,7 +134,7 @@ type reply struct {
 // replyBuf is our internal deserialization of reply plus optional fd
 type replyBuf struct {
 	// value will be converted to a reply Value
-	value interface{}
+	value any
 	// fd is the read half of a pipe, passed back to the client
 	fd *os.File
 	// pipeid will be provided to the client as PipeID, an index into our open pipes
@@ -144,7 +155,7 @@ type activePipe struct {
 // openImage is an opened image reference
 type openImage struct {
 	// id is an opaque integer handle
-	id        uint32
+	id        uint64
 	src       types.ImageSource
 	cachedimg types.Image
 }
@@ -159,15 +170,23 @@ type proxyHandler struct {
 	cache  types.BlobInfoCache
 
 	// imageSerial is a counter for open images
-	imageSerial uint32
+	imageSerial uint64
 	// images holds our opened images
-	images map[uint32]*openImage
+	images map[uint64]*openImage
 	// activePipes maps from "pipeid" to a pipe + goroutine pair
 	activePipes map[uint32]*activePipe
 }
 
+// convertedLayerInfo is the reduced form of the OCI type BlobInfo
+// Used in the return value of GetLayerInfo
+type convertedLayerInfo struct {
+	Digest    digest.Digest `json:"digest"`
+	Size      int64         `json:"size"`
+	MediaType string        `json:"media_type"`
+}
+
 // Initialize performs one-time initialization, and returns the protocol version
-func (h *proxyHandler) Initialize(args []interface{}) (replyBuf, error) {
+func (h *proxyHandler) Initialize(args []any) (replyBuf, error) {
 	h.lock.Lock()
 	defer h.lock.Unlock()
 
@@ -196,7 +215,30 @@ func (h *proxyHandler) Initialize(args []interface{}) (replyBuf, error) {
 
 // OpenImage accepts a string image reference i.e. TRANSPORT:REF - like `skopeo copy`.
 // The return value is an opaque integer handle.
-func (h *proxyHandler) OpenImage(args []interface{}) (replyBuf, error) {
+func (h *proxyHandler) OpenImage(args []any) (replyBuf, error) {
+	return h.openImageImpl(args, false)
+}
+
+// isDockerManifestUnknownError is a copy of code from containers/image,
+// please update there first.
+func isDockerManifestUnknownError(err error) bool {
+	var ec dockerdistributionerrcode.ErrorCoder
+	if !errors.As(err, &ec) {
+		return false
+	}
+	return ec.ErrorCode() == dockerdistributionapi.ErrorCodeManifestUnknown
+}
+
+// isNotFoundImageError heuristically attempts to determine whether an error
+// is saying the remote source couldn't find the image (as opposed to an
+// authentication error, an I/O error etc.)
+// TODO drive this into containers/image properly
+func isNotFoundImageError(err error) bool {
+	return isDockerManifestUnknownError(err) ||
+		errors.Is(err, ocilayout.ImageNotFoundError{})
+}
+
+func (h *proxyHandler) openImageImpl(args []any, allowNotFound bool) (retReplyBuf replyBuf, retErr error) {
 	h.lock.Lock()
 	defer h.lock.Unlock()
 	var ret replyBuf
@@ -218,9 +260,34 @@ func (h *proxyHandler) OpenImage(args []interface{}) (replyBuf, error) {
 	}
 	imgsrc, err := imgRef.NewImageSource(context.Background(), h.sysctx)
 	if err != nil {
+		if allowNotFound && isNotFoundImageError(err) {
+			ret.value = sentinelImageID
+			return ret, nil
+		}
 		return ret, err
 	}
 
+	policyContext, err := h.opts.global.getPolicyContext()
+	if err != nil {
+		return ret, err
+	}
+	defer func() {
+		if err := policyContext.Destroy(); err != nil {
+			retErr = noteCloseFailure(retErr, "tearing down policy context", err)
+		}
+	}()
+
+	unparsedTopLevel := image.UnparsedInstance(imgsrc, nil)
+	allowed, err := policyContext.IsRunningImageAllowed(context.Background(), unparsedTopLevel)
+	if err != nil {
+		return ret, err
+	}
+	if !allowed {
+		return ret, fmt.Errorf("internal inconsistency: policy verification failed without returning an error")
+	}
+
+	// Note that we never return zero as an imageid; this code doesn't yet
+	// handle overflow though.
 	h.imageSerial++
 	openimg := &openImage{
 		id:  h.imageSerial,
@@ -232,7 +299,14 @@ func (h *proxyHandler) OpenImage(args []interface{}) (replyBuf, error) {
 	return ret, nil
 }
 
-func (h *proxyHandler) CloseImage(args []interface{}) (replyBuf, error) {
+// OpenImage accepts a string image reference i.e. TRANSPORT:REF - like `skopeo copy`.
+// The return value is an opaque integer handle.  If the image does not exist, zero
+// is returned.
+func (h *proxyHandler) OpenImageOptional(args []any) (replyBuf, error) {
+	return h.openImageImpl(args, true)
+}
+
+func (h *proxyHandler) CloseImage(args []any) (replyBuf, error) {
 	h.lock.Lock()
 	defer h.lock.Unlock()
 	var ret replyBuf
@@ -253,16 +327,8 @@ func (h *proxyHandler) CloseImage(args []interface{}) (replyBuf, error) {
 	return ret, nil
 }
 
-func parseImageID(v interface{}) (uint32, error) {
-	imgidf, ok := v.(float64)
-	if !ok {
-		return 0, fmt.Errorf("expecting integer imageid, not %T", v)
-	}
-	return uint32(imgidf), nil
-}
-
 // parseUint64 validates that a number fits inside a JavaScript safe integer
-func parseUint64(v interface{}) (uint64, error) {
+func parseUint64(v any) (uint64, error) {
 	f, ok := v.(float64)
 	if !ok {
 		return 0, fmt.Errorf("expecting numeric, not %T", v)
@@ -273,11 +339,14 @@ func parseUint64(v interface{}) (uint64, error) {
 	return uint64(f), nil
 }
 
-func (h *proxyHandler) parseImageFromID(v interface{}) (*openImage, error) {
-	imgid, err := parseImageID(v)
+func (h *proxyHandler) parseImageFromID(v any) (*openImage, error) {
+	imgid, err := parseUint64(v)
 	if err != nil {
 		return nil, err
 	}
+	if imgid == sentinelImageID {
+		return nil, fmt.Errorf("Invalid imageid value of zero")
+	}
 	imgref, ok := h.images[imgid]
 	if !ok {
 		return nil, fmt.Errorf("no image %v", imgid)
@@ -300,7 +369,7 @@ func (h *proxyHandler) allocPipe() (*os.File, *activePipe, error) {
 
 // returnBytes generates a return pipe() from a byte array
 // In the future it might be nicer to return this via memfd_create()
-func (h *proxyHandler) returnBytes(retval interface{}, buf []byte) (replyBuf, error) {
+func (h *proxyHandler) returnBytes(retval any, buf []byte) (replyBuf, error) {
 	var ret replyBuf
 	piper, f, err := h.allocPipe()
 	if err != nil {
@@ -362,7 +431,7 @@ func (h *proxyHandler) cacheTargetManifest(img *openImage) error {
 
 // GetManifest returns a copy of the manifest, converted to OCI format, along with the original digest.
 // Manifest lists are resolved to the current operating system and architecture.
-func (h *proxyHandler) GetManifest(args []interface{}) (replyBuf, error) {
+func (h *proxyHandler) GetManifest(args []any) (replyBuf, error) {
 	h.lock.Lock()
 	defer h.lock.Unlock()
 
@@ -433,7 +502,7 @@ func (h *proxyHandler) GetManifest(args []interface{}) (replyBuf, error) {
 
 // GetFullConfig returns a copy of the image configuration, converted to OCI format.
 // https://github.com/opencontainers/image-spec/blob/main/config.md
-func (h *proxyHandler) GetFullConfig(args []interface{}) (replyBuf, error) {
+func (h *proxyHandler) GetFullConfig(args []any) (replyBuf, error) {
 	h.lock.Lock()
 	defer h.lock.Unlock()
 
@@ -470,7 +539,7 @@ func (h *proxyHandler) GetFullConfig(args []interface{}) (replyBuf, error) {
 // GetConfig returns a copy of the container runtime configuration, converted to OCI format.
 // Note that due to a historical mistake, this returns not the full image configuration,
 // but just the container runtime configuration.  You should use GetFullConfig instead.
-func (h *proxyHandler) GetConfig(args []interface{}) (replyBuf, error) {
+func (h *proxyHandler) GetConfig(args []any) (replyBuf, error) {
 	h.lock.Lock()
 	defer h.lock.Unlock()
 
@@ -505,7 +574,7 @@ func (h *proxyHandler) GetConfig(args []interface{}) (replyBuf, error) {
 }
 
 // GetBlob fetches a blob, performing digest verification.
-func (h *proxyHandler) GetBlob(args []interface{}) (replyBuf, error) {
+func (h *proxyHandler) GetBlob(args []any) (replyBuf, error) {
 	h.lock.Lock()
 	defer h.lock.Unlock()
 
@@ -542,10 +611,12 @@ func (h *proxyHandler) GetBlob(args []interface{}) (replyBuf, error) {
 
 	piper, f, err := h.allocPipe()
 	if err != nil {
+		blobr.Close()
 		return ret, err
 	}
 	go func() {
 		// Signal completion when we return
+		defer blobr.Close()
 		defer f.wg.Done()
 		verifier := d.Verifier()
 		tr := io.TeeReader(blobr, verifier)
@@ -568,8 +639,58 @@ func (h *proxyHandler) GetBlob(args []interface{}) (replyBuf, error) {
 	return ret, nil
 }
 
+// GetLayerInfo returns data about the layers of an image, useful for reading the layer contents.
+//
+// This needs to be called since the data returned by GetManifest() does not allow to correctly
+// calling GetBlob() for the containers-storage: transport (which doesn’t store the original compressed
+// representations referenced in the manifest).
+func (h *proxyHandler) GetLayerInfo(args []any) (replyBuf, error) {
+	h.lock.Lock()
+	defer h.lock.Unlock()
+
+	var ret replyBuf
+
+	if h.sysctx == nil {
+		return ret, fmt.Errorf("client error: must invoke Initialize")
+	}
+
+	if len(args) != 1 {
+		return ret, fmt.Errorf("found %d args, expecting (imgid)", len(args))
+	}
+
+	imgref, err := h.parseImageFromID(args[0])
+	if err != nil {
+		return ret, err
+	}
+
+	ctx := context.TODO()
+
+	err = h.cacheTargetManifest(imgref)
+	if err != nil {
+		return ret, err
+	}
+	img := imgref.cachedimg
+
+	layerInfos, err := img.LayerInfosForCopy(ctx)
+	if err != nil {
+		return ret, err
+	}
+
+	if layerInfos == nil {
+		layerInfos = img.LayerInfos()
+	}
+
+	layers := make([]convertedLayerInfo, 0, len(layerInfos))
+	for _, layer := range layerInfos {
+		layers = append(layers, convertedLayerInfo{layer.Digest, layer.Size, layer.MediaType})
+	}
+
+	ret.value = layers
+	return ret, nil
+}
+
 // FinishPipe waits for the worker goroutine to finish, and closes the write side of the pipe.
-func (h *proxyHandler) FinishPipe(args []interface{}) (replyBuf, error) {
+func (h *proxyHandler) FinishPipe(args []any) (replyBuf, error) {
 	h.lock.Lock()
 	defer h.lock.Unlock()
 
@@ -596,6 +717,17 @@ func (h *proxyHandler) FinishPipe(args []interface{}) (replyBuf, error) {
 	return ret, err
 }
 
+// close releases all resources associated with this proxy backend
+func (h *proxyHandler) close() {
+	for _, image := range h.images {
+		err := image.src.Close()
+		if err != nil {
+			// This shouldn't be fatal
+			logrus.Warnf("Failed to close image %s: %v", transports.ImageName(image.cachedimg.Reference()), err)
+		}
+	}
+}
+
 // send writes a reply buffer to the socket
 func (buf replyBuf) send(conn *net.UnixConn, err error) error {
 	replyToSerialize := reply{
@@ -678,6 +810,8 @@ func (h *proxyHandler) processRequest(readBytes []byte) (rb replyBuf, terminate
 		rb, err = h.Initialize(req.Args)
 	case "OpenImage":
 		rb, err = h.OpenImage(req.Args)
+	case "OpenImageOptional":
+		rb, err = h.OpenImageOptional(req.Args)
 	case "CloseImage":
 		rb, err = h.CloseImage(req.Args)
 	case "GetManifest":
@@ -688,10 +822,14 @@ func (h *proxyHandler) processRequest(readBytes []byte) (rb replyBuf, terminate
 		rb, err = h.GetFullConfig(req.Args)
 	case "GetBlob":
 		rb, err = h.GetBlob(req.Args)
+	case "GetLayerInfo":
+		rb, err = h.GetLayerInfo(req.Args)
 	case "FinishPipe":
 		rb, err = h.FinishPipe(req.Args)
 	case "Shutdown":
 		terminate = true
+	// NOTE: If you add a method here, you should very likely be bumping the
+	// const protocolVersion above.
 	default:
 		err = fmt.Errorf("unknown method: %s", req.Method)
 	}
@@ -702,9 +840,10 @@ func (h *proxyHandler) processRequest(readBytes []byte) (rb replyBuf, terminate
 func (opts *proxyOptions) run(args []string, stdout io.Writer) error {
 	handler := &proxyHandler{
 		opts:        opts,
-		images:      make(map[uint32]*openImage),
+		images:      make(map[uint64]*openImage),
 		activePipes: make(map[uint32]*activePipe),
 	}
+	defer handler.close()
 
 	// Convert the socket FD passed by client into a net.FileConn
 	fd := os.NewFile(uintptr(opts.sockFd), "sock")

cmd/skopeo/signing.go

@@ -6,6 +6,7 @@ import (
 	"fmt"
 	"io"
 	"os"
+	"strings"
 
 	"github.com/containers/image/v5/pkg/cli"
 	"github.com/containers/image/v5/signature"
@@ -41,12 +42,12 @@ func (opts *standaloneSignOptions) run(args []string, stdout io.Writer) error {
 
 	manifest, err := os.ReadFile(manifestPath)
 	if err != nil {
-		return fmt.Errorf("Error reading %s: %v", manifestPath, err)
+		return fmt.Errorf("Error reading %s: %w", manifestPath, err)
 	}
 
 	mech, err := signature.NewGPGSigningMechanism()
 	if err != nil {
-		return fmt.Errorf("Error initializing GPG: %v", err)
+		return fmt.Errorf("Error initializing GPG: %w", err)
 	}
 	defer mech.Close()
 
@@ -57,25 +58,31 @@ func (opts *standaloneSignOptions) run(args []string, stdout io.Writer) error {
 
 	signature, err := signature.SignDockerManifestWithOptions(manifest, dockerReference, mech, fingerprint, &signature.SignOptions{Passphrase: passphrase})
 	if err != nil {
-		return fmt.Errorf("Error creating signature: %v", err)
+		return fmt.Errorf("Error creating signature: %w", err)
 	}
 
 	if err := os.WriteFile(opts.output, signature, 0644); err != nil {
-		return fmt.Errorf("Error writing signature to %s: %v", opts.output, err)
+		return fmt.Errorf("Error writing signature to %s: %w", opts.output, err)
 	}
 	return nil
 }
 
 type standaloneVerifyOptions struct {
+	publicKeyFile string
 }
 
 func standaloneVerifyCmd() *cobra.Command {
 	opts := standaloneVerifyOptions{}
 	cmd := &cobra.Command{
-		Use:   "standalone-verify MANIFEST DOCKER-REFERENCE KEY-FINGERPRINT SIGNATURE",
+		Use:   "standalone-verify MANIFEST DOCKER-REFERENCE KEY-FINGERPRINTS SIGNATURE",
 		Short: "Verify a signature using local files",
-		RunE:  commandAction(opts.run),
+		Long: `Verify a signature using local files
+
+KEY-FINGERPRINTS can be a comma separated list of fingerprints, or "any" if you trust all the keys in the public key file.`,
+		RunE: commandAction(opts.run),
 	}
+	flags := cmd.Flags()
+	flags.StringVar(&opts.publicKeyFile, "public-key-file", "", `File containing public keys. If not specified, will use local GPG keys.`)
 	adjustUsage(cmd)
 	return cmd
 }
@@ -86,29 +93,51 @@ func (opts *standaloneVerifyOptions) run(args []string, stdout io.Writer) error
 	}
 	manifestPath := args[0]
 	expectedDockerReference := args[1]
-	expectedFingerprint := args[2]
+	expectedFingerprints := strings.Split(args[2], ",")
 	signaturePath := args[3]
 
+	if opts.publicKeyFile == "" && len(expectedFingerprints) == 1 && expectedFingerprints[0] == "any" {
+		return fmt.Errorf("Cannot use any fingerprint without a public key file")
+	}
 	unverifiedManifest, err := os.ReadFile(manifestPath)
 	if err != nil {
-		return fmt.Errorf("Error reading manifest from %s: %v", manifestPath, err)
+		return fmt.Errorf("Error reading manifest from %s: %w", manifestPath, err)
 	}
 	unverifiedSignature, err := os.ReadFile(signaturePath)
 	if err != nil {
-		return fmt.Errorf("Error reading signature from %s: %v", signaturePath, err)
+		return fmt.Errorf("Error reading signature from %s: %w", signaturePath, err)
 	}
 
-	mech, err := signature.NewGPGSigningMechanism()
-	if err != nil {
-		return fmt.Errorf("Error initializing GPG: %v", err)
+	var mech signature.SigningMechanism
+	var publicKeyfingerprints []string
+	if opts.publicKeyFile != "" {
+		publicKeys, err := os.ReadFile(opts.publicKeyFile)
+		if err != nil {
+			return fmt.Errorf("Error reading public keys from %s: %w", opts.publicKeyFile, err)
+		}
+		mech, publicKeyfingerprints, err = signature.NewEphemeralGPGSigningMechanism(publicKeys)
+		if err != nil {
+			return fmt.Errorf("Error initializing GPG: %w", err)
+
+		}
+	} else {
+		mech, err = signature.NewGPGSigningMechanism()
+		if err != nil {
+			return fmt.Errorf("Error initializing GPG: %w", err)
+		}
 	}
 	defer mech.Close()
-	sig, err := signature.VerifyDockerManifestSignature(unverifiedSignature, unverifiedManifest, expectedDockerReference, mech, expectedFingerprint)
-	if err != nil {
-		return fmt.Errorf("Error verifying signature: %v", err)
+
+	if len(expectedFingerprints) == 1 && expectedFingerprints[0] == "any" {
+		expectedFingerprints = publicKeyfingerprints
 	}
 
-	fmt.Fprintf(stdout, "Signature verified, digest %s\n", sig.DockerManifestDigest)
+	sig, verificationFingerprint, err := signature.VerifyImageManifestSignatureUsingKeyIdentityList(unverifiedSignature, unverifiedManifest, expectedDockerReference, mech, expectedFingerprints)
+	if err != nil {
+		return fmt.Errorf("Error verifying signature: %w", err)
+	}
+
+	fmt.Fprintf(stdout, "Signature verified using fingerprint %s, digest %s\n", verificationFingerprint, sig.DockerManifestDigest)
 	return nil
 }
 
@@ -141,7 +170,7 @@ func (opts *untrustedSignatureDumpOptions) run(args []string, stdout io.Writer)
 
 	untrustedSignature, err := os.ReadFile(untrustedSignaturePath)
 	if err != nil {
-		return fmt.Errorf("Error reading untrusted signature from %s: %v", untrustedSignaturePath, err)
+		return fmt.Errorf("Error reading untrusted signature from %s: %w", untrustedSignaturePath, err)
 	}
 
 	untrustedInfo, err := signature.GetUntrustedSignatureInformationWithoutVerifying(untrustedSignature)

cmd/skopeo/signing_test.go

@@ -127,11 +127,36 @@ func TestStandaloneVerify(t *testing.T) {
 		dockerReference, fixturesTestKeyFingerprint, "fixtures/corrupt.signature")
 	assertTestFailed(t, out, err, "Error verifying signature")
 
+	// Error using any without a public key file
+	out, err = runSkopeo("standalone-verify", manifestPath,
+		dockerReference, "any", signaturePath)
+	assertTestFailed(t, out, err, "Cannot use any fingerprint without a public key file")
+
 	// Success
 	out, err = runSkopeo("standalone-verify", manifestPath,
 		dockerReference, fixturesTestKeyFingerprint, signaturePath)
 	assert.NoError(t, err)
-	assert.Equal(t, "Signature verified, digest "+fixturesTestImageManifestDigest.String()+"\n", out)
+	assert.Equal(t, "Signature verified using fingerprint "+fixturesTestKeyFingerprint+", digest "+fixturesTestImageManifestDigest.String()+"\n", out)
+
+	// Using multiple fingerprints
+	out, err = runSkopeo("standalone-verify", manifestPath,
+		dockerReference, "0123456789ABCDEF0123456789ABCDEF01234567,"+fixturesTestKeyFingerprint+",DEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEF", signaturePath)
+	assert.NoError(t, err)
+	assert.Equal(t, "Signature verified using fingerprint "+fixturesTestKeyFingerprint+", digest "+fixturesTestImageManifestDigest.String()+"\n", out)
+
+	// Using a public key file
+	t.Setenv("GNUPGHOME", "")
+	out, err = runSkopeo("standalone-verify", "--public-key-file", "fixtures/pubring.gpg", manifestPath,
+		dockerReference, fixturesTestKeyFingerprint, signaturePath)
+	assert.NoError(t, err)
+	assert.Equal(t, "Signature verified using fingerprint "+fixturesTestKeyFingerprint+", digest "+fixturesTestImageManifestDigest.String()+"\n", out)
+
+	// Using a public key file matching any public key
+	t.Setenv("GNUPGHOME", "")
+	out, err = runSkopeo("standalone-verify", "--public-key-file", "fixtures/pubring.gpg", manifestPath,
+		dockerReference, "any", signaturePath)
+	assert.NoError(t, err)
+	assert.Equal(t, "Signature verified using fingerprint "+fixturesTestKeyFingerprint+", digest "+fixturesTestImageManifestDigest.String()+"\n", out)
 }
 
 func TestUntrustedSignatureDump(t *testing.T) {

cmd/skopeo/sync.go

@@ -19,12 +19,15 @@ import (
 	"github.com/containers/image/v5/docker"
 	"github.com/containers/image/v5/docker/reference"
 	"github.com/containers/image/v5/pkg/cli"
+	"github.com/containers/image/v5/pkg/cli/sigstore"
+	"github.com/containers/image/v5/signature/signer"
 	"github.com/containers/image/v5/transports"
 	"github.com/containers/image/v5/types"
 	"github.com/opencontainers/go-digest"
 	"github.com/sirupsen/logrus"
 	"github.com/spf13/cobra"
-	"gopkg.in/yaml.v2"
+	"golang.org/x/exp/slices"
+	"gopkg.in/yaml.v3"
 )
 
 // syncOptions contains information retrieved from the skopeo sync command line.
@@ -36,6 +39,7 @@ type syncOptions struct {
 	retryOpts                *retry.Options
 	removeSignatures         bool                      // Do not copy signatures from the source image
 	signByFingerprint        string                    // Sign the image using a GPG key with the specified fingerprint
+	signBySigstoreParamFile  string                    // Sign the image using a sigstore signature per configuration in a param file
 	signBySigstorePrivateKey string                    // Sign the image using a sigstore private key
 	signPassphraseFile       string                    // Path pointing to a passphrase file when signing
 	format                   commonFlag.OptionalString // Force conversion of the image to a specified format
@@ -46,6 +50,7 @@ type syncOptions struct {
 	dryRun                   bool                      // Don't actually copy anything, just output what it would have done
 	preserveDigests          bool                      // Preserve digests during sync
 	keepGoing                bool                      // Whether or not to abort the sync if there are any errors during syncing the images
+	appendSuffix             string                    // Suffix to append to destination image tag
 }
 
 // repoDescriptor contains information of a single repository used as a sync source.
@@ -106,12 +111,14 @@ See skopeo-sync(1) for details.
 	flags := cmd.Flags()
 	flags.BoolVar(&opts.removeSignatures, "remove-signatures", false, "Do not copy signatures from SOURCE images")
 	flags.StringVar(&opts.signByFingerprint, "sign-by", "", "Sign the image using a GPG key with the specified `FINGERPRINT`")
+	flags.StringVar(&opts.signBySigstoreParamFile, "sign-by-sigstore", "", "Sign the image using a sigstore parameter file at `PATH`")
 	flags.StringVar(&opts.signBySigstorePrivateKey, "sign-by-sigstore-private-key", "", "Sign the image using a sigstore private key at `PATH`")
 	flags.StringVar(&opts.signPassphraseFile, "sign-passphrase-file", "", "File that contains a passphrase for the --sign-by key")
 	flags.VarP(commonFlag.NewOptionalStringValue(&opts.format), "format", "f", `MANIFEST TYPE (oci, v2s1, or v2s2) to use when syncing image(s) to a destination (default is manifest type of source, with fallbacks)`)
 	flags.StringVarP(&opts.source, "src", "s", "", "SOURCE transport type")
 	flags.StringVarP(&opts.destination, "dest", "d", "", "DESTINATION transport type")
 	flags.BoolVar(&opts.scoped, "scoped", false, "Images at DESTINATION are prefix using the full source image path as scope")
+	flags.StringVar(&opts.appendSuffix, "append-suffix", "", "String to append to DESTINATION tags")
 	flags.BoolVarP(&opts.all, "all", "a", false, "Copy all images if SOURCE-IMAGE is a list")
 	flags.BoolVar(&opts.dryRun, "dry-run", false, "Run without actually copying data")
 	flags.BoolVar(&opts.preserveDigests, "preserve-digests", false, "Preserve digests of images and lists")
@@ -125,12 +132,12 @@ See skopeo-sync(1) for details.
 }
 
 // UnmarshalYAML is the implementation of the Unmarshaler interface method
-// method for the tlsVerifyConfig type.
+// for the tlsVerifyConfig type.
 // It unmarshals the 'tls-verify' YAML key so that, when they key is not
 // specified, tls verification is enforced.
-func (tls *tlsVerifyConfig) UnmarshalYAML(unmarshal func(interface{}) error) error {
+func (tls *tlsVerifyConfig) UnmarshalYAML(value *yaml.Node) error {
 	var verify bool
-	if err := unmarshal(&verify); err != nil {
+	if err := value.Decode(&verify); err != nil {
 		return err
 	}
 
@@ -216,15 +223,7 @@ func getImageTags(ctx context.Context, sysCtx *types.SystemContext, repoRef refe
 	}
 	tags, err := docker.GetRepositoryTags(ctx, sysCtx, dockerRef)
 	if err != nil {
-		var unauthorizedForCredentials docker.ErrUnauthorizedForCredentials
-		if errors.As(err, &unauthorizedForCredentials) {
-			// Some registries may decide to block the "list all tags" endpoint.
-			// Gracefully allow the sync to continue in this case.
-			logrus.Warnf("Registry disallows tag list retrieval: %s", err)
-			tags = nil
-		} else {
-			return nil, fmt.Errorf("Error determining repository tags for image %s: %w", name, err)
-		}
+		return nil, fmt.Errorf("Error determining repository tags for repo %s: %w", name, err)
 	}
 
 	return tags, nil
@@ -244,7 +243,11 @@ func imagesToCopyFromRepo(sys *types.SystemContext, repoRef reference.Named) ([]
 	for _, tag := range tags {
 		taggedRef, err := reference.WithTag(repoRef, tag)
 		if err != nil {
-			return nil, fmt.Errorf("Error creating a reference for repository %s and tag %q: %w", repoRef.Name(), tag, err)
+			logrus.WithFields(logrus.Fields{
+				"repo": repoRef.Name(),
+				"tag":  tag,
+			}).Errorf("Error creating a tagged reference from registry tag list: %v", err)
+			continue
 		}
 		ref, err := docker.NewReference(taggedRef)
 		if err != nil {
@@ -521,26 +524,17 @@ func (opts *syncOptions) run(args []string, stdout io.Writer) (retErr error) {
 	}()
 
 	// validate source and destination options
-	contains := func(val string, list []string) (_ bool) {
-		for _, l := range list {
-			if l == val {
-				return true
-			}
-		}
-		return
-	}
-
 	if len(opts.source) == 0 {
 		return errors.New("A source transport must be specified")
 	}
-	if !contains(opts.source, []string{docker.Transport.Name(), directory.Transport.Name(), "yaml"}) {
+	if !slices.Contains([]string{docker.Transport.Name(), directory.Transport.Name(), "yaml"}, opts.source) {
 		return fmt.Errorf("%q is not a valid source transport", opts.source)
 	}
 
 	if len(opts.destination) == 0 {
 		return errors.New("A destination transport must be specified")
 	}
-	if !contains(opts.destination, []string{docker.Transport.Name(), directory.Transport.Name()}) {
+	if !slices.Contains([]string{docker.Transport.Name(), directory.Transport.Name()}, opts.destination) {
 		return fmt.Errorf("%q is not a valid destination transport", opts.destination)
 	}
 
@@ -548,6 +542,8 @@ func (opts *syncOptions) run(args []string, stdout io.Writer) (retErr error) {
 		return errors.New("sync from 'dir' to 'dir' not implemented, consider using rsync instead")
 	}
 
+	opts.destImage.warnAboutIneffectiveOptions(transports.Get(opts.destination))
+
 	imageListSelection := copy.CopySystemImage
 	if opts.all {
 		imageListSelection = copy.CopyAllImages
@@ -604,13 +600,31 @@ func (opts *syncOptions) run(args []string, stdout io.Writer) (retErr error) {
 		}
 		passphrase = p
 	}
+
+	var signers []*signer.Signer
+	if opts.signBySigstoreParamFile != "" {
+		signer, err := sigstore.NewSignerFromParameterFile(opts.signBySigstoreParamFile, &sigstore.Options{
+			PrivateKeyPassphrasePrompt: func(keyFile string) (string, error) {
+				return promptForPassphrase(keyFile, os.Stdin, os.Stdout)
+			},
+			Stdin:  os.Stdin,
+			Stdout: stdout,
+		})
+		if err != nil {
+			return fmt.Errorf("Error using --sign-by-sigstore: %w", err)
+		}
+		defer signer.Close()
+		signers = append(signers, signer)
+	}
+
 	options := copy.Options{
 		RemoveSignatures:                      opts.removeSignatures,
+		Signers:                               signers,
 		SignBy:                                opts.signByFingerprint,
 		SignPassphrase:                        passphrase,
 		SignBySigstorePrivateKeyFile:          opts.signBySigstorePrivateKey,
 		SignSigstorePrivateKeyPassphrase:      []byte(passphrase),
-		ReportWriter:                          os.Stdout,
+		ReportWriter:                          stdout,
 		DestinationCtx:                        destinationCtx,
 		ImageListSelection:                    imageListSelection,
 		PreserveDigests:                       opts.preserveDigests,
@@ -644,7 +658,7 @@ func (opts *syncOptions) run(args []string, stdout io.Writer) (retErr error) {
 				destSuffix = path.Base(destSuffix)
 			}
 
-			destRef, err := destinationReference(path.Join(destination, destSuffix), opts.destination)
+			destRef, err := destinationReference(path.Join(destination, destSuffix)+opts.appendSuffix, opts.destination)
 			if err != nil {
 				return err
 			}

cmd/skopeo/sync_test.go

@@ -0,0 +1,46 @@
+package main
+
+import (
+	"testing"
+
+	"github.com/containers/image/v5/types"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+	"gopkg.in/yaml.v3"
+)
+
+var _ yaml.Unmarshaler = (*tlsVerifyConfig)(nil)
+
+func TestTLSVerifyConfig(t *testing.T) {
+	type container struct { // An example of a larger config file
+		TLSVerify tlsVerifyConfig `yaml:"tls-verify"`
+	}
+
+	for _, c := range []struct {
+		input    string
+		expected tlsVerifyConfig
+	}{
+		{
+			input:    `tls-verify: true`,
+			expected: tlsVerifyConfig{skip: types.OptionalBoolFalse},
+		},
+		{
+			input:    `tls-verify: false`,
+			expected: tlsVerifyConfig{skip: types.OptionalBoolTrue},
+		},
+		{
+			input:    ``, // No value
+			expected: tlsVerifyConfig{skip: types.OptionalBoolUndefined},
+		},
+	} {
+		config := container{}
+		err := yaml.Unmarshal([]byte(c.input), &config)
+		require.NoError(t, err, c.input)
+		assert.Equal(t, c.expected, config.TLSVerify, c.input)
+	}
+
+	// Invalid input
+	config := container{}
+	err := yaml.Unmarshal([]byte(`tls-verify: "not a valid bool"`), &config)
+	assert.Error(t, err)
+}

cmd/skopeo/unshare_linux.go

@@ -6,6 +6,7 @@ import (
 	"github.com/containers/image/v5/transports/alltransports"
 	"github.com/containers/storage/pkg/unshare"
 	"github.com/syndtr/gocapability/capability"
+	"golang.org/x/exp/slices"
 )
 
 var neededCapabilities = []capability.Cap{
@@ -21,29 +22,32 @@ func maybeReexec() error {
 	// With Skopeo we need only the subset of the root capabilities necessary
 	// for pulling an image to the storage.  Do not attempt to create a namespace
 	// if we already have the capabilities we need.
-	capabilities, err := capability.NewPid(0)
+	capabilities, err := capability.NewPid2(0)
 	if err != nil {
 		return fmt.Errorf("error reading the current capabilities sets: %w", err)
 	}
-	for _, cap := range neededCapabilities {
-		if !capabilities.Get(capability.EFFECTIVE, cap) {
-			// We miss a capability we need, create a user namespaces
-			unshare.MaybeReexecUsingUserNamespace(true)
-			return nil
-		}
+	if err := capabilities.Load(); err != nil {
+		return fmt.Errorf("error loading the current capabilities sets: %w", err)
+	}
+	if slices.ContainsFunc(neededCapabilities, func(cap capability.Cap) bool {
+		return !capabilities.Get(capability.EFFECTIVE, cap)
+	}) {
+		// We miss a capability we need, create a user namespaces
+		unshare.MaybeReexecUsingUserNamespace(true)
+		return nil
 	}
 	return nil
 }
 
 func reexecIfNecessaryForImages(imageNames ...string) error {
 	// Check if container-storage is used before doing unshare
-	for _, imageName := range imageNames {
+	if slices.ContainsFunc(imageNames, func(imageName string) bool {
 		transport := alltransports.TransportFromImageName(imageName)
 		// Hard-code the storage name to avoid a reference on c/image/storage.
 		// See https://github.com/containers/skopeo/issues/771#issuecomment-563125006.
-		if transport != nil && transport.Name() == "containers-storage" {
-			return maybeReexec()
-		}
+		return transport != nil && transport.Name() == "containers-storage"
+	}) {
+		return maybeReexec()
 	}
 	return nil
 }

cmd/skopeo/utils.go

@@ -10,6 +10,7 @@ import (
 
 	commonFlag "github.com/containers/common/pkg/flag"
 	"github.com/containers/common/pkg/retry"
+	"github.com/containers/image/v5/directory"
 	"github.com/containers/image/v5/manifest"
 	"github.com/containers/image/v5/pkg/compression"
 	"github.com/containers/image/v5/transports/alltransports"
@@ -30,11 +31,11 @@ type errorShouldDisplayUsage struct {
 // The error for closeErr is annotated with description (which is not a format string)
 // Typical usage:
 //
-// defer func() {
-//     if err := something.Close(); err != nil {
-//         returnedErr = noteCloseFailure(returnedErr, "closing something", err)
-//     }
-// }
+//	defer func() {
+//		if err := something.Close(); err != nil {
+//			returnedErr = noteCloseFailure(returnedErr, "closing something", err)
+//		}
+//	}
 func noteCloseFailure(err error, description string, closeErr error) error {
 	// We don’t accept a Closer() and close it ourselves because signature.PolicyContext has .Destroy(), not .Close().
 	// This also makes it harder for a caller to do
@@ -43,7 +44,7 @@ func noteCloseFailure(err error, description string, closeErr error) error {
 	if err == nil {
 		return fmt.Errorf("%s: %w", description, closeErr)
 	}
-	// In this case we prioritize the primary error for use with %w; closeErr is usually less relevant, or might be a consequence of the primary erorr.
+	// In this case we prioritize the primary error for use with %w; closeErr is usually less relevant, or might be a consequence of the primary error.
 	return fmt.Errorf("%w (%s: %v)", err, description, closeErr)
 }
 
@@ -244,6 +245,7 @@ func (opts *imageOptions) newSystemContext() (*types.SystemContext, error) {
 }
 
 // imageDestOptions is a superset of imageOptions specialized for image destinations.
+// Every user should call imageDestOptions.warnAboutIneffectiveOptions() as part of handling the CLI
 type imageDestOptions struct {
 	*imageOptions
 	dirForceCompression         bool                   // Compress layers when saving to the dir: transport
@@ -252,12 +254,13 @@ type imageDestOptions struct {
 	compressionFormat           string                 // Format to use for the compression
 	compressionLevel            commonFlag.OptionalInt // Level to use for the compression
 	precomputeDigests           bool                   // Precompute digests to dedup layers when saving to the docker: transport
+	imageDestFlagPrefix         string
 }
 
 // imageDestFlags prepares a collection of CLI flags writing into imageDestOptions, and the managed imageDestOptions structure.
 func imageDestFlags(global *globalOptions, shared *sharedImageOptions, deprecatedTLSVerify *deprecatedTLSVerifyOption, flagPrefix, credsOptionAlias string) (pflag.FlagSet, *imageDestOptions) {
 	genericFlags, genericOptions := imageFlags(global, shared, deprecatedTLSVerify, flagPrefix, credsOptionAlias)
-	opts := imageDestOptions{imageOptions: genericOptions}
+	opts := imageDestOptions{imageOptions: genericOptions, imageDestFlagPrefix: flagPrefix}
 	fs := pflag.FlagSet{}
 	fs.AddFlagSet(&genericFlags)
 	fs.BoolVar(&opts.dirForceCompression, flagPrefix+"compress", false, "Compress tarball image layers when saving to directory using the 'dir' transport. (default is same compression type as source)")
@@ -295,18 +298,28 @@ func (opts *imageDestOptions) newSystemContext() (*types.SystemContext, error) {
 	return ctx, err
 }
 
+// warnAboutIneffectiveOptions warns if any ineffective option was set by the user
+// Every user should call this as part of handling the CLI
+func (opts *imageDestOptions) warnAboutIneffectiveOptions(destTransport types.ImageTransport) {
+	if destTransport.Name() != directory.Transport.Name() {
+		if opts.dirForceCompression {
+			logrus.Warnf("--%s can only be used if the destination transport is 'dir'", opts.imageDestFlagPrefix+"compress")
+		}
+		if opts.dirForceDecompression {
+			logrus.Warnf("--%s can only be used if the destination transport is 'dir'", opts.imageDestFlagPrefix+"decompress")
+		}
+	}
+}
+
 func parseCreds(creds string) (string, string, error) {
 	if creds == "" {
 		return "", "", errors.New("credentials can't be empty")
 	}
-	up := strings.SplitN(creds, ":", 2)
-	if len(up) == 1 {
-		return up[0], "", nil
-	}
-	if up[0] == "" {
+	username, password, _ := strings.Cut(creds, ":") // Sets password to "" if there is no ":"
+	if username == "" {
 		return "", "", errors.New("username can't be empty")
 	}
-	return up[0], up[1], nil
+	return username, password, nil
 }
 
 func getDockerAuth(creds string) (*types.DockerAuthConfig, error) {

cmd/skopeo/utils_test.go

@@ -385,7 +385,6 @@ func TestParseManifestFormat(t *testing.T) {
 // since there is a shared authfile image option and a non-shared (prefixed) one, make sure the override logic
 // works correctly.
 func TestImageOptionsAuthfileOverride(t *testing.T) {
-
 	for _, testCase := range []struct {
 		flagPrefix           string
 		cmdFlags             []string

contrib/cirrus/ostree_ext.dockerfile

@@ -0,0 +1,15 @@
+ARG BASE_FQIN=quay.io/coreos-assembler/fcos-buildroot:testing-devel
+FROM $BASE_FQIN
+
+# See 'Danger of using COPY and ADD instructions'
+# at https://cirrus-ci.org/guide/docker-builder-vm/#dockerfile-as-a-ci-environment
+# Provide easy way to force-invalidate image cache by .cirrus.yml change
+ARG CIRRUS_IMAGE_VERSION
+ENV CIRRUS_IMAGE_VERSION=$CIRRUS_IMAGE_VERSION
+ADD https://sh.rustup.rs /var/tmp/rustup_installer.sh
+
+RUN dnf erase -y rust && \
+    chmod +x /var/tmp/rustup_installer.sh && \
+    /var/tmp/rustup_installer.sh -y --default-toolchain stable --profile minimal
+
+ENV PATH=/root/.cargo/bin:/root/.local/bin:/root/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin

contrib/cirrus/runner.sh

@@ -55,9 +55,6 @@ _run_setup() {
     # VM's come with the distro. skopeo package pre-installed
     dnf erase -y skopeo
 
-    # Required for testing the SIF transport
-    dnf install -y fakeroot squashfs-tools
-
     msg "Removing systemd-resolved from nsswitch.conf"
     # /etc/resolv.conf is already set to bypass systemd-resolvd
     sed -i -r -e 's/^(hosts.+)resolve.+dns/\1dns/' /etc/nsswitch.conf
@@ -115,18 +112,19 @@ _run_unit() {
     make test-unit-local BUILDTAGS="$BUILDTAGS"
 }
 
-_run_integration() {
+_podman_reset() {
     # Ensure we start with a clean-slate
-    podman system reset --force
+    showrun podman system reset --force
+}
 
+_run_integration() {
+    _podman_reset
     make test-integration-local BUILDTAGS="$BUILDTAGS"
 }
 
 _run_system() {
-    # Ensure we start with a clean-slate
-    podman system reset --force
-
-    # Executes with containers required for testing.
+    _podman_reset
+    ##### Note: Test MODIFIES THE HOST SETUP #####
     make test-system-local BUILDTAGS="$BUILDTAGS"
 }
 

contrib/skopeoimage/README.md

@@ -1,4 +1,17 @@
-<img src="https://cdn.rawgit.com/containers/skopeo/master/docs/skopeo.svg" width="250">
+[comment]: <> (***ATTENTION*** ***WARNING*** ***ALERT*** ***CAUTION*** ***DANGER***)
+[comment]: <> ()
+[comment]: <> (ANY changes made to this file, once committed/merged must)
+[comment]: <> (be manually copy/pasted -in markdown- into the description)
+[comment]: <> (field on Quay at the following locations:)
+[comment]: <> ()
+[comment]: <> (https://quay.io/repository/containers/skopeo)
+[comment]: <> (https://quay.io/repository/skopeo/stable)
+[comment]: <> (https://quay.io/repository/skopeo/testing)
+[comment]: <> (https://quay.io/repository/skopeo/upstream)
+[comment]: <> ()
+[comment]: <> (***ATTENTION*** ***WARNING*** ***ALERT*** ***CAUTION*** ***DANGER***)
+
+<img src="https://cdn.rawgit.com/containers/skopeo/main/docs/skopeo.svg" width="250">
 
 ----
 
@@ -12,9 +25,7 @@ the images live are public and can be pulled without credentials.  These contain
 resulting containers can run safely with privileges within the container.
 
 The container images are built using the latest Fedora and then Skopeo is installed into them.
-The PATH in the container images is set to the default PATH provided by Fedora.  Also, the
-ENTRYPOINT and the WORKDIR variables are not set within these container images, as such they
-default to `/`.
+The ENTRYPOINT of the container is set to execute the `skopeo` binary.
 
 The container images are:
 

contrib/skopeoimage/upstream/Containerfile

@@ -16,27 +16,11 @@ FROM registry.fedoraproject.org/fedora:latest
 #       https://bugzilla.redhat.com/show_bug.cgi?id=1995337#c3
 RUN dnf -y update && \
     rpm --setcaps shadow-utils 2>/dev/null && \
-    dnf -y --enablerepo updates-testing --exclude container-selinux install \
-        make \
-        golang \
-        git \
-        go-md2man \
-        fuse-overlayfs \
-        fuse3 \
-        containers-common \
-        gpgme-devel \
-        libassuan-devel \
-        btrfs-progs-devel \
-        device-mapper-devel && \
-    mkdir /root/skopeo && \
-    git clone https://github.com/containers/skopeo \
-        /root/skopeo/src/github.com/containers/skopeo && \
-    export GOPATH=/root/skopeo && \
-    cd /root/skopeo/src/github.com/containers/skopeo && \
-    make bin/skopeo && \
-    make PREFIX=/usr install && \
-    rm -rf /root/skopeo/* && \
-    dnf -y remove git golang go-md2man make && \
+    dnf -y install 'dnf-command(copr)' --enablerepo=updates-testing && \
+    dnf -y copr enable rhcontainerbot/podman-next && \
+    dnf -y install skopeo \
+        --exclude container-selinux \
+        --enablerepo=updates-testing && \
     dnf clean all && \
     rm -rf /var/cache /var/log/dnf* /var/log/yum.*
 

default.yaml

@@ -1,8 +1,8 @@
 # This is a default registries.d configuration file.  You may
 # add to this file or create additional files in registries.d/.
 #
-# lookaside: indicates a location that is read and write
-# lookaside-staging: indicates a location that is only for write
+# lookaside: for reading/writing simple signing signatures
+# lookaside-staging: for writing simple signing signatures, preferred over lookaside
 #
 # lookaside and lookaside-staging take a value of the following:
 #   lookaside:  {schema}://location
@@ -10,10 +10,12 @@
 # For reading signatures, schema may be http, https, or file.
 # For writing signatures, schema may only be file.
 
-# This is the default signature write location for docker registries.
+# The default locations are built-in, for both reading and writing:
+# /var/lib/containers/sigstore for root, or
+# ~/.local/share/containers/sigstore for non-root users.
 default-docker:
-#  lookaside: file:///var/lib/containers/sigstore
-  lookaside-staging: file:///var/lib/containers/sigstore
+#  lookaside: https://…
+#  lookaside-staging: file:///…
 
 # The 'docker' indicator here is the start of the configuration
 # for docker registries.
@@ -21,6 +23,6 @@ default-docker:
 # docker:
 #
 #   privateregistry.com:
-#    lookaside: http://privateregistry.com/sigstore/
+#    lookaside: https://privateregistry.com/sigstore/
 #    lookaside-staging: /mnt/nfs/privateregistry/sigstore
 

docs/skopeo-copy.1.md

@@ -20,6 +20,8 @@ automatically inherit any parts of the source name.
 
 ## OPTIONS
 
+See also [skopeo(1)](skopeo.1.md) for options placed before the subcommand name.
+
 **--additional-tag**=_strings_
 
 Additional tags (supports docker-archive).
@@ -58,6 +60,8 @@ After copying the image, write the digest of the resulting image to the file.
 
 Preserve the digests during copying. Fail if the digest cannot be preserved.
 
+This option does not change what will be copied; consider using `--all` at the same time.
+
 **--encrypt-layer** _ints_
 
 *Experimental* the 0-indexed layer indices, with support for negative indexing (e.g. 0 is the first layer, -1 is the last layer)
@@ -93,6 +97,11 @@ Do not copy signatures, if any, from _source-image_. Necessary when copying a si
 
 Add a “simple signing” signature using that key ID for an image name corresponding to _destination-image_
 
+**--sign-by-sigstore** _param-file_
+
+Add a sigstore signature based on the options in the specified containers sigstore signing parameter file, _param-file_.
+See containers-sigstore-signing-params.yaml(5) for details about the file format.
+
 **--sign-by-sigstore-private-key** _path_
 
 Add a sigstore signature using a private key at _path_ for an image name corresponding to _destination-image_
@@ -173,7 +182,7 @@ Existing signatures, if any, are preserved as well.
 
 **--dest-compress-format** _format_
 
-Specifies the compression format to use.  Supported values are: `gzip` and `zstd`.
+Specifies the compression format to use.  Supported values are: `gzip`, `zstd` and `zstd:chunked`.
 
 **--dest-compress-level** _format_
 
@@ -214,12 +223,12 @@ The password to access the destination registry.
 ## EXAMPLES
 
 To just copy an image from one registry to another:
-```sh
+```console
 $ skopeo copy docker://quay.io/skopeo/stable:latest docker://registry.example.com/skopeo:latest
 ```
 
 To copy the layers of the docker.io busybox image to a local directory:
-```sh
+```console
 $ mkdir -p /var/lib/images/busybox
 $ skopeo copy docker://busybox:latest dir:/var/lib/images/busybox
 $ ls /var/lib/images/busybox/*
@@ -228,42 +237,46 @@ $ ls /var/lib/images/busybox/*
   /tmp/busybox/8ddc19f16526912237dd8af81971d5e4dd0587907234be2b83e249518d5b673f.tar
 ```
 
-To copy and sign an image:
+To create an archive consumable by `docker load` (but note that using a registry is almost always more efficient):
+```console
+$ skopeo copy docker://busybox:latest docker-archive:archive-file.tar:busybox:latest
+```
 
-```sh
-# skopeo copy --sign-by dev@example.com containers-storage:example/busybox:streaming docker://example/busybox:gold
+To copy and sign an image:
+```console
+$ skopeo copy --sign-by dev@example.com containers-storage:example/busybox:streaming docker://example/busybox:gold
 ```
 
 To encrypt an image:
-```sh
-skopeo copy docker://docker.io/library/nginx:1.17.8 oci:local_nginx:1.17.8
+```console
+$ skopeo copy docker://docker.io/library/nginx:1.17.8 oci:local_nginx:1.17.8
 
-openssl genrsa -out private.key 1024
-openssl rsa -in private.key -pubout > public.key
+$ openssl genrsa -out private.key 1024
+$ openssl rsa -in private.key -pubout > public.key
 
-skopeo  copy --encryption-key jwe:./public.key oci:local_nginx:1.17.8 oci:try-encrypt:encrypted
+$ skopeo copy --encryption-key jwe:./public.key oci:local_nginx:1.17.8 oci:try-encrypt:encrypted
 ```
 
 To decrypt an image:
-```sh
-skopeo copy --decryption-key ./private.key oci:try-encrypt:encrypted oci:try-decrypt:decrypted
+```console
+$ skopeo copy --decryption-key ./private.key oci:try-encrypt:encrypted oci:try-decrypt:decrypted
 ```
 
 To copy encrypted image without decryption:
-```sh
-skopeo copy oci:try-encrypt:encrypted oci:try-encrypt-copy:encrypted
+```console
+$ skopeo copy oci:try-encrypt:encrypted oci:try-encrypt-copy:encrypted
 ```
 
 To decrypt an image that requires more than one key:
-```sh
-skopeo copy --decryption-key ./private1.key --decryption-key ./private2.key --decryption-key ./private3.key oci:try-encrypt:encrypted oci:try-decrypt:decrypted
+```console
+$ skopeo copy --decryption-key ./private1.key --decryption-key ./private2.key --decryption-key ./private3.key oci:try-encrypt:encrypted oci:try-decrypt:decrypted
 ```
 
 Container images can also be partially encrypted by specifying the index of the layer. Layers are 0-indexed indices, with support for negative indexing. i.e. 0 is the first layer, -1 is the last layer.
 
 Let's say out of 3 layers that the image `docker.io/library/nginx:1.17.8` is made up of, we only want to encrypt the 2nd layer,
-```sh
-skopeo  copy --encryption-key jwe:./public.key --encrypt-layer 1 oci:local_nginx:1.17.8 oci:try-encrypt:encrypted
+```console
+$ skopeo copy --encryption-key jwe:./public.key --encrypt-layer 1 oci:local_nginx:1.17.8 oci:try-encrypt:encrypted
 ```
 
 ## SEE ALSO

docs/skopeo-delete.1.md

@@ -31,6 +31,8 @@ $ docker exec -it registry /usr/bin/registry garbage-collect /etc/docker-distrib
 
 ## OPTIONS
 
+See also [skopeo(1)](skopeo.1.md) for options placed before the subcommand name.
+
 **--authfile** _path_
 
 Path of the authentication file. Default is ${XDG_RUNTIME\_DIR}/containers/auth.json, which is set using `skopeo login`.
@@ -85,7 +87,7 @@ The password to access the registry.
 ## EXAMPLES
 
 Mark image example/pause for deletion from the registry.example.com registry:
-```sh
+```console
 $ skopeo delete docker://registry.example.com/example/pause:latest
 ```
 See above for additional details on using the command **delete**.

docs/skopeo-generate-sigstore-key.1.md

@@ -0,0 +1,49 @@
+% skopeo-generate-sigstore-key(1)
+
+## NAME
+skopeo\-generate-sigstore-key - Generate a sigstore public/private key pair.
+
+## SYNOPSIS
+**skopeo generate-sigstore-key** [*options*] **--output-prefix** _prefix_
+
+## DESCRIPTION
+
+Generates a public/private key pair suitable for creating sigstore image signatures.
+The private key is encrypted with a passphrase;
+if one is not provided using an option, this command prompts for it interactively.
+
+The private key is written to _prefix_**.private** .
+The private key is written to _prefix_**.pub** .
+
+## OPTIONS
+
+See also [skopeo(1)](skopeo.1.md) for options placed before the subcommand name.
+
+**--help**, **-h**
+
+Print usage statement
+
+**--output-prefix** _prefix_
+
+Mandatory.
+Path prefix for the output keys (_prefix_**.private** and _prefix_**.pub**).
+
+**--passphrase-file** _path_
+
+The passphare to use to encrypt the private key.
+Only the first line will be read.
+A passphrase stored in a file is of questionable security if other users can read this file.
+Do not use this option if at all avoidable.
+
+## EXAMPLES
+
+```console
+$ skopeo generate-sigstore-key --output-prefix mykey
+```
+
+# SEE ALSO
+skopeo(1), skopeo-copy(1), containers-policy.json(5)
+
+## AUTHORS
+
+Miloslav Trmač <mitr@redhat.com>

docs/skopeo-inspect.1.md

@@ -17,6 +17,8 @@ To see values for a different architecture/OS, use the **--override-os** / **--o
 
 ## OPTIONS
 
+See also [skopeo(1)](skopeo.1.md) for options placed before the subcommand name.
+
 **--authfile** _path_
 
 Path of the authentication file. Default is ${XDG\_RUNTIME\_DIR}/containers/auth.json, which is set using `skopeo login`.
@@ -42,6 +44,7 @@ Use docker daemon host at _host_ (`docker-daemon:` transport only)
 
 Format the output using the given Go template.
 The keys of the returned JSON can be used as the values for the --format flag (see examples below).
+Supports the Go templating functions available at https://pkg.go.dev/github.com/containers/common/pkg/report#hdr-Template_Functions
 
 **--help**, **-h**
 
@@ -87,74 +90,90 @@ Do not list the available tags from the repository in the output. When `true`, t
 ## EXAMPLES
 
 To review information for the image fedora from the docker.io registry:
-```sh
+```console
 $ skopeo inspect docker://docker.io/fedora
+
 {
     "Name": "docker.io/library/fedora",
-    "Digest": "sha256:a97914edb6ba15deb5c5acf87bd6bd5b6b0408c96f48a5cbd450b5b04509bb7d",
+    "Digest": "sha256:f99efcddc4dd6736d8a88cc1ab6722098ec1d77dbf7aed9a7a514fc997ca08e0",
     "RepoTags": [
-	"20",
-	"21",
-	"22",
-	"23",
-	"24",
-	"heisenbug",
-	"latest",
-	"rawhide"
+        "20",
+        "21",
+        "..."
     ],
-    "Created": "2016-06-20T19:33:43.220526898Z",
-    "DockerVersion": "1.10.3",
-    "Labels": {},
+    "Created": "2022-11-16T07:26:42.618327645Z",
+    "DockerVersion": "20.10.12",
+    "Labels": {
+        "maintainer": "Clement Verna \u003ccverna@fedoraproject.org\u003e"
+    },
     "Architecture": "amd64",
     "Os": "linux",
     "Layers": [
-	"sha256:7c91a140e7a1025c3bc3aace4c80c0d9933ac4ee24b8630a6b0b5d8b9ce6b9d4"
+        "sha256:cb8b1ed77979b894115a983f391465651aa7eb3edd036be4b508eea47271eb93"
+    ],
+    "LayersData": [
+        {
+            "MIMEType": "application/vnd.docker.image.rootfs.diff.tar.gzip",
+            "Digest": "sha256:cb8b1ed77979b894115a983f391465651aa7eb3edd036be4b508eea47271eb93",
+            "Size": 65990920,
+            "Annotations": null
+        }
+    ],
+    "Env": [
+        "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
+        "DISTTAG=f37container",
+        "FGC=f37",
+        "FBR=f37"
     ]
 }
 ```
 
 To inspect python from the docker.io registry and not show the available tags:
-```sh
+```console
 $ skopeo inspect --no-tags docker://docker.io/library/python
 {
     "Name": "docker.io/library/python",
-    "Digest": "sha256:5ca194a80ddff913ea49c8154f38da66a41d2b73028c5cf7e46bc3c1d6fda572",
+    "Digest": "sha256:10fc14aa6ae69f69e4c953cffd9b0964843d8c163950491d2138af891377bc1d",
     "RepoTags": [],
-    "Created": "2021-10-05T23:40:54.936108045Z",
-    "DockerVersion": "20.10.7",
+    "Created": "2022-11-16T06:55:28.566254104Z",
+    "DockerVersion": "20.10.12",
     "Labels": null,
     "Architecture": "amd64",
     "Os": "linux",
     "Layers": [
-        "sha256:df5590a8898bedd76f02205dc8caa5cc9863267dbcd8aac038bcd212688c1cc7",
-        "sha256:705bb4cb554eb7751fd21a994f6f32aee582fbe5ea43037db6c43d321763992b",
-        "sha256:519df5fceacdeaadeec563397b1d9f4d7c29c9f6eff879739cab6f0c144f49e1",
-        "sha256:ccc287cbeddc96a0772397ca00ec85482a7b7f9a9fac643bfddd87b932f743db",
-        "sha256:e3f8e6af58ed3a502f0c3c15dce636d9d362a742eb5b67770d0cfcb72f3a9884",
-        "sha256:aebed27b2d86a5a3a2cbe186247911047a7e432b9d17daad8f226597c0ea4276",
-        "sha256:54c32182bdcc3041bf64077428467109a70115888d03f7757dcf614ff6d95ebe",
-        "sha256:cc8b7caedab13af07adf4836e13af2d4e9e54d794129b0fd4c83ece6b1112e86",
-        "sha256:462c3718af1d5cdc050cfba102d06c26f78fe3b738ce2ca2eb248034b1738945"
+        "sha256:a8ca11554fce00d9177da2d76307bdc06df7faeb84529755c648ac4886192ed1",
+        "sha256:e4e46864aba2e62ba7c75965e4aa33ec856ee1b1074dda6b478101c577b63abd",
+        "..."
+    ],
+    "LayersData": [
+        {
+            "MIMEType": "application/vnd.docker.image.rootfs.diff.tar.gzip",
+            "Digest": "sha256:a8ca11554fce00d9177da2d76307bdc06df7faeb84529755c648ac4886192ed1",
+            "Size": 55038615,
+            "Annotations": null
+        },
+        {
+            "MIMEType": "application/vnd.docker.image.rootfs.diff.tar.gzip",
+            "Digest": "sha256:e4e46864aba2e62ba7c75965e4aa33ec856ee1b1074dda6b478101c577b63abd",
+            "Size": 5164893,
+            "Annotations": null
+        },
+        "..."
     ],
     "Env": [
         "PATH=/usr/local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
         "LANG=C.UTF-8",
-        "GPG_KEY=A035C8C19219BA821ECEA86B64E628F8D684696D",
-        "PYTHON_VERSION=3.10.0",
-        "PYTHON_PIP_VERSION=21.2.4",
-        "PYTHON_SETUPTOOLS_VERSION=57.5.0",
-        "PYTHON_GET_PIP_URL=https://github.com/pypa/get-pip/raw/d781367b97acf0ece7e9e304bf281e99b618bf10/public/get-pip.py",
-        "PYTHON_GET_PIP_SHA256=01249aa3e58ffb3e1686b7141b4e9aac4d398ef4ac3012ed9dff8dd9f685ffe0"
+        "...",
     ]
 }
 ```
 
-```
+```console
 $ /bin/skopeo inspect --config docker://registry.fedoraproject.org/fedora --format "{{ .Architecture }}"
 amd64
 ```
 
-```
+```console
 $ /bin/skopeo inspect --format '{{ .Env }}' docker://registry.access.redhat.com/ubi8
 [PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin container=oci]
 ```

docs/skopeo-list-tags.1.md

@@ -12,6 +12,8 @@ Return a list of tags from _source-image_ in a registry or a local docker-archiv
 
 ## OPTIONS
 
+See also [skopeo(1)](skopeo.1.md) for options placed before the subcommand name.
+
 **--authfile** _path_
 
 Path of the authentication file. Default is ${XDG\_RUNTIME\_DIR}/containers/auth.json, which is set using `skopeo login`.
@@ -79,7 +81,7 @@ This commands refers to repositories using a _transport_`:`_details_ format. The
 
 ### Docker Transport
 To get the list of tags in the "fedora" repository from the docker.io registry (the repository name expands to "library/fedora" per docker transport canonical form):
-```sh
+```console
 $ skopeo list-tags docker://docker.io/fedora
 {
     "Repository": "docker.io/library/fedora",
@@ -110,7 +112,7 @@ $ skopeo list-tags docker://docker.io/fedora
 
 To list the tags in a local host docker/distribution registry on port 5000, in this case for the "fedora" repository:
 
-```sh
+```console
 $ skopeo list-tags docker://localhost:5000/fedora
 {
     "Repository": "localhost:5000/fedora",
@@ -127,7 +129,7 @@ $ skopeo list-tags docker://localhost:5000/fedora
 
 To list the tags in a local docker-archive file:
 
-```sh
+```console
 $ skopeo list-tags docker-archive:/tmp/busybox.tar.gz
 {
     "Tags": [
@@ -138,7 +140,7 @@ $ skopeo list-tags docker-archive:/tmp/busybox.tar.gz
 
 Also supports more than one tags in an archive:
 
-```sh
+```console
 $ skopeo list-tags docker-archive:/tmp/docker-two-images.tar.gz
 {
     "Tags": [
@@ -150,7 +152,7 @@ $ skopeo list-tags docker-archive:/tmp/docker-two-images.tar.gz
 
 Will include a source-index entry for each untagged image:
 
-```sh
+```console
 $ skopeo list-tags docker-archive:/tmp/four-tags-with-an-untag.tar
 {
     "Tags": [

docs/skopeo-login.1.md

@@ -15,6 +15,8 @@ flag. The default path used is **${XDG\_RUNTIME\_DIR}/containers/auth.json**.
 
 ## OPTIONS
 
+See also [skopeo(1)](skopeo.1.md) for options placed before the subcommand name.
+
 **--password**, **-p**=*password*
 
 Password for registry
@@ -34,6 +36,10 @@ Path of the authentication file. Default is ${XDG\_RUNTIME\_DIR}/containers/auth
 Note: You can also override the default path of the authentication file by setting the REGISTRY\_AUTH\_FILE
 environment variable. `export REGISTRY_AUTH_FILE=path`
 
+**--compat-auth-file**=*path*
+
+Instead of updating the default credentials file, update the one at *path*, and use a Docker-compatible format.
+
 **--get-login**
 
 Return the logged-in user for the registry. Return error if no login is found.
@@ -57,41 +63,41 @@ Write more detailed information to stdout
 
 ## EXAMPLES
 
-```
+```console
 $ skopeo login docker.io
 Username: testuser
 Password:
 Login Succeeded!
 ```
 
-```
+```console
 $ skopeo login -u testuser -p testpassword localhost:5000
 Login Succeeded!
 ```
 
-```
+```console
 $ skopeo login --authfile authdir/myauths.json docker.io
 Username: testuser
 Password:
 Login Succeeded!
 ```
 
-```
+```console
 $ skopeo login --tls-verify=false -u test -p test localhost:5000
 Login Succeeded!
 ```
 
-```
+```console
 $ skopeo login --cert-dir /etc/containers/certs.d/ -u foo -p bar localhost:5000
 Login Succeeded!
 ```
 
-```
+```console
 $ skopeo login -u testuser  --password-stdin < testpassword.txt docker.io
 Login Succeeded!
 ```
 
-```
+```console
 $ echo $testpassword | skopeo login -u testuser --password-stdin docker.io
 Login Succeeded!
 ```

docs/skopeo-logout.1.md

@@ -14,6 +14,8 @@ All the cached credentials can be removed by setting the **all** flag.
 
 ## OPTIONS
 
+See also [skopeo(1)](skopeo.1.md) for options placed before the subcommand name.
+
 **--authfile**=*path*
 
 Path of the authentication file. Default is ${XDG\_RUNTIME\_DIR}/containers/auth.json
@@ -21,6 +23,10 @@ Path of the authentication file. Default is ${XDG\_RUNTIME\_DIR}/containers/auth
 Note: You can also override the default path of the authentication file by setting the REGISTRY\_AUTH\_FILE
 environment variable. `export REGISTRY_AUTH_FILE=path`
 
+**--compat-auth-file**=*path*
+
+Instead of updating the default credentials file, update the one at *path*, and use a Docker-compatible format.
+
 **--all**, **-a**
 
 Remove the cached credentials for all registries in the auth file
@@ -35,17 +41,17 @@ Require HTTPS and verify certificates when talking to the container registry or
 
 ## EXAMPLES
 
-```
+```console
 $ skopeo logout docker.io
 Remove login credentials for docker.io
 ```
 
-```
+```console
 $ skopeo logout --authfile authdir/myauths.json docker.io
 Remove login credentials for docker.io
 ```
 
-```
+```console
 $ skopeo logout --all
 Remove login credentials for all registries
 ```

docs/skopeo-manifest-digest.1.md

@@ -18,7 +18,7 @@ Print usage statement
 
 ## EXAMPLES
 
-```sh
+```console
 $ skopeo manifest-digest manifest.json
 sha256:a59906e33509d14c036c8678d687bd4eec81ed7c4b8ce907b888c607f6a1e0e6
 ```

docs/skopeo-standalone-sign.1.md

@@ -17,6 +17,8 @@ This is primarily a debugging tool, useful for special cases, and usually should
 
 ## OPTIONS
 
+See also [skopeo(1)](skopeo.1.md) for options placed before the subcommand name.
+
 **--help**, **-h**
 
 Print usage statement
@@ -31,7 +33,7 @@ The passphare to use when signing with the key ID from `--sign-by`. Only the fir
 
 ## EXAMPLES
 
-```sh
+```console
 $ skopeo standalone-sign busybox-manifest.json registry.example.com/example/busybox 1D8230F6CDB6A06716E414C1DB72F2188BB46CC8 --output busybox.signature
 $
 ```

docs/skopeo-standalone-verify.1.md

@@ -4,7 +4,7 @@
 skopeo\-standalone\-verify - Verify an image signature.
 
 ## SYNOPSIS
-**skopeo standalone-verify** _manifest_ _docker-reference_ _key-fingerprint_ _signature_
+**skopeo standalone-verify** _manifest_ _docker-reference_ _key-fingerprints_ _signature_
 
 ## DESCRIPTION
 
@@ -16,7 +16,7 @@ as per containers-policy.json(5).
 
   _docker-reference_ A docker reference expected to identify the image in the signature
 
-  _key-fingerprint_ Expected identity of the signing key
+  _key-fingerprints_ Identities of trusted signing keys (comma separated), or "any" to trust any known key when using a public key file
 
   _signature_ Path to signature file
 
@@ -24,13 +24,19 @@ as per containers-policy.json(5).
 
 ## OPTIONS
 
+See also [skopeo(1)](skopeo.1.md) for options placed before the subcommand name.
+
 **--help**, **-h**
 
 Print usage statement
 
+**--public-key-file** _public key file_
+
+File containing the public keys to use when verifying signatures. If this is not specified, keys from the GPG homedir are used.
+
 ## EXAMPLES
 
-```sh
+```console
 $ skopeo standalone-verify busybox-manifest.json registry.example.com/example/busybox 1D8230F6CDB6A06716E414C1DB72F2188BB46CC8  busybox.signature
 Signature verified, digest sha256:20bf21ed457b390829cdbeec8795a7bea1626991fda603e0d01b4e7f60427e55
 ```

docs/skopeo-sync.1.md

@@ -1,17 +1,14 @@
 % skopeo-sync(1)
 
 ## NAME
-skopeo\-sync - Synchronize images between container registries and local directories.
+skopeo\-sync - Synchronize images between registry repositories and local directories.
 
 
 ## SYNOPSIS
 **skopeo sync** [*options*] --src _transport_ --dest _transport_ _source_ _destination_
 
 ## DESCRIPTION
-Synchronize images between container registries and local directories.
-The synchronization is achieved by copying all the images found at _source_ to _destination_.
-
-Useful to synchronize a local container registry mirror, and to to populate registries running inside of air-gapped environments.
+Synchronize images between registry repositories and local directories. Synchronization is achieved by copying all the images found at _source_ to _destination_ - useful when synchronizing a local container registry mirror or for populating registries running inside of air-gapped environments.
 
 Differently from other skopeo commands, skopeo sync requires both source and destination transports to be specified separately from _source_ and _destination_.
 One of the problems of prefixing a destination with its transport is that, the registry `docker://hostname:port` would be wrongly interpreted as an image reference at a non-fully qualified registry, with `hostname` and `port` the image name and tag.
@@ -32,6 +29,9 @@ When the `--scoped` option is specified, images are prefixed with the source ima
 name can be stored at _destination_.
 
 ## OPTIONS
+
+See also [skopeo(1)](skopeo.1.md) for options placed before the subcommand name.
+
 **--all**, **-a**
 If one of the images in __src__ refers to a list of images, instead of copying just the image which matches the current OS and
 architecture (subject to the use of the global --override-os, --override-arch and --override-variant options), attempt to copy all of
@@ -66,7 +66,13 @@ Print usage statement.
 
 **--scoped** Prefix images with the source image path, so that multiple images with the same name can be stored at _destination_.
 
-**--preserve-digests** Preserve the digests during copying. Fail if the digest cannot be preserved.
+**--append-suffix** _tag-suffix_ String to append to destination tags.
+
+**--preserve-digests**
+
+Preserve the digests during copying. Fail if the digest cannot be preserved.
+
+This option does not change what will be copied; consider using `--all` at the same time.
 
 **--remove-signatures** Do not copy signatures, if any, from _source-image_. This is necessary when copying a signed image to a destination which does not support signatures.
 
@@ -74,6 +80,11 @@ Print usage statement.
 
 Add a “simple signing” signature using that key ID for an image name corresponding to _destination-image_
 
+**--sign-by-sigstore** _param-file_
+
+Add a sigstore signature based on the options in the specified containers sigstore signing parameter file, _param-file_.
+See containers-sigstore-signing-params.yaml(5) for details about the file format.
+
 **--sign-by-sigstore-private-key** _path_
 
 Add a sigstore signature using a private key at _path_ for an image name corresponding to _destination-image_
@@ -126,7 +137,7 @@ The password to access the destination registry.
 ## EXAMPLES
 
 ### Synchronizing to a local directory
-```
+```console
 $ skopeo sync --src docker --dest dir registry.example.com/busybox /media/usb
 ```
 Images are located at:
@@ -144,7 +155,7 @@ Images are located at:
 /media/usb/busybox:1-glibc
 ```
 Sync run
-```
+```console
 $ skopeo sync --src dir --dest docker /media/usb/busybox:1-glibc my-registry.local.lan/test/
 ```
 Destination registry content:
@@ -154,7 +165,7 @@ my-registry.local.lan/test/busybox   1-glibc
 ```
 
 ### Synchronizing to a local directory, scoped
-```
+```console
 $ skopeo sync --src docker --dest dir --scoped registry.example.com/busybox /media/usb
 ```
 Images are located at:
@@ -167,8 +178,8 @@ Images are located at:
 ```
 
 ### Synchronizing to a container registry
-```
-skopeo sync --src docker --dest docker registry.example.com/busybox my-registry.local.lan
+```console
+$ skopeo sync --src docker --dest docker registry.example.com/busybox my-registry.local.lan
 ```
 Destination registry content:
 ```
@@ -177,8 +188,8 @@ registry.local.lan/busybox   1-glibc, 1-musl, 1-ubuntu, ..., latest
 ```
 
 ### Synchronizing to a container registry keeping the repository
-```
-skopeo sync --src docker --dest docker registry.example.com/repo/busybox my-registry.local.lan/repo
+```console
+$ skopeo sync --src docker --dest docker registry.example.com/repo/busybox my-registry.local.lan/repo
 ```
 Destination registry content:
 ```
@@ -186,6 +197,16 @@ REPO                              TAGS
 registry.local.lan/repo/busybox   1-glibc, 1-musl, 1-ubuntu, ..., latest
 ```
 
+### Synchronizing to a container registry with tag suffix
+```console
+$ skopeo sync --src docker --dest docker --append-suffix '-mirror' registry.example.com/busybox my-registry.local.lan
+```
+Destination registry content:
+```
+REPO                         TAGS
+registry.local.lan/busybox   1-glibc-mirror, 1-musl-mirror, 1-ubuntu-mirror, ..., latest-mirror
+```
+
 ### YAML file content (used _source_ for `**--src yaml**`)
 
 ```yaml
@@ -210,8 +231,8 @@ quay.io:
             - latest
 ```
 If the yaml filename is `sync.yml`, sync run:
-```
-skopeo sync --src yaml --dest docker sync.yml my-registry.local.lan/repo/
+```console
+$ skopeo sync --src yaml --dest docker sync.yml my-registry.local.lan/repo/
 ```
 This will copy the following images:
 - Repository `registry.example.com/busybox`: all images, as no tags are specified.

docs/skopeo.1.md

@@ -47,10 +47,13 @@ Most commands refer to container images, using a _transport_`:`_details_ format.
   **oci-archive:**_path_**:**_tag_
   An image _tag_ in a tar archive compliant with "Open Container Image Layout Specification" at _path_.
 
-See [containers-transports(5)](https://github.com/containers/image/blob/master/docs/containers-transports.5.md) for details.
+See [containers-transports(5)](https://github.com/containers/image/blob/main/docs/containers-transports.5.md) for details.
 
 ## OPTIONS
 
+These options should be placed before the subcommand name.
+Individual subcommands have their own options.
+
 **--command-timeout** _duration_
 
 Timeout for the command execution.
@@ -101,6 +104,7 @@ Print the version number
 | ----------------------------------------- | ------------------------------------------------------------------------------ |
 | [skopeo-copy(1)](skopeo-copy.1.md)        | Copy an image (manifest, filesystem layers, signatures) from one location to another. |
 | [skopeo-delete(1)](skopeo-delete.1.md)    | Mark the _image-name_ for later deletion by the registry's garbage collector.  |
+| [skopeo-generate-sigstore-key(1)](skopeo-generate-sigstore-key.1.md)    | Generate a sigstore public/private key pair.  |
 | [skopeo-inspect(1)](skopeo-inspect.1.md)  | Return low-level information about _image-name_ in a registry.                 |
 | [skopeo-list-tags(1)](skopeo-list-tags.1.md)  | List image names in a transport-specific collection of images.|
 | [skopeo-login(1)](skopeo-login.1.md)  | Login to a container registry. |
@@ -108,16 +112,16 @@ Print the version number
 | [skopeo-manifest-digest(1)](skopeo-manifest-digest.1.md)    | Compute a manifest digest for a manifest-file and write it to standard output. |
 | [skopeo-standalone-sign(1)](skopeo-standalone-sign.1.md)    | Debugging tool - Publish and sign an image in one step.      |
 | [skopeo-standalone-verify(1)](skopeo-standalone-verify.1.md)| Verify an image signature.                                   |
-| [skopeo-sync(1)](skopeo-sync.1.md)| Synchronize images between container registries and local directories.                 |
+| [skopeo-sync(1)](skopeo-sync.1.md)| Synchronize images between registry repositories and local directories.                |
 
 ## FILES
   **/etc/containers/policy.json**
   Default trust policy file, if **--policy** is not specified.
-  The policy format is documented in [containers-policy.json(5)](https://github.com/containers/image/blob/master/docs/containers-policy.json.5.md) .
+  The policy format is documented in [containers-policy.json(5)](https://github.com/containers/image/blob/main/docs/containers-policy.json.5.md) .
 
   **/etc/containers/registries.d**
   Default directory containing registry configuration, if **--registries.d** is not specified.
-  The contents of this directory are documented in [containers-policy.json(5)](https://github.com/containers/image/blob/master/docs/containers-policy.json.5.md).
+  The contents of this directory are documented in [containers-registries.d(5)](https://github.com/containers/image/blob/main/docs/containers-registries.d.5.md).
 
 ## SEE ALSO
 skopeo-login(1), docker-login(1), containers-auth.json(5), containers-storage.conf(5), containers-policy.json(5), containers-transports(5)

go.mod

@@ -1,110 +1,133 @@
 module github.com/containers/skopeo
 
-go 1.17
+go 1.19
 
 require (
-	github.com/containers/common v0.49.1
-	github.com/containers/image/v5 v5.22.1
-	github.com/containers/ocicrypt v1.1.8
-	github.com/containers/storage v1.42.0
-	github.com/docker/docker v20.10.20+incompatible
+	github.com/containers/common v0.57.0
+	github.com/containers/image/v5 v5.29.0
+	github.com/containers/ocicrypt v1.1.9
+	github.com/containers/storage v1.51.0
+	github.com/docker/distribution v2.8.3+incompatible
 	github.com/opencontainers/go-digest v1.0.0
-	github.com/opencontainers/image-spec v1.1.0-rc2
+	github.com/opencontainers/image-spec v1.1.0-rc5
 	github.com/opencontainers/image-tools v1.0.0-rc3
-	github.com/sirupsen/logrus v1.9.0
-	github.com/spf13/cobra v1.6.0
+	github.com/sirupsen/logrus v1.9.3
+	github.com/spf13/cobra v1.8.0
 	github.com/spf13/pflag v1.0.5
-	github.com/stretchr/testify v1.8.1
+	github.com/stretchr/testify v1.8.4
 	github.com/syndtr/gocapability v0.0.0-20200815063812-42c35b437635
-	golang.org/x/term v0.17.0
-	gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c
-	gopkg.in/yaml.v2 v2.4.0
+	golang.org/x/exp v0.0.0-20231006140011-7918f672742d
+	golang.org/x/term v0.14.0
+	gopkg.in/yaml.v3 v3.0.1
 )
 
 require (
-	github.com/BurntSushi/toml v1.2.0 // indirect
-	github.com/Microsoft/go-winio v0.6.0 // indirect
-	github.com/Microsoft/hcsshim v0.9.3 // indirect
+	dario.cat/mergo v1.0.0 // indirect
+	github.com/BurntSushi/toml v1.3.2 // indirect
+	github.com/Microsoft/go-winio v0.6.1 // indirect
+	github.com/Microsoft/hcsshim v0.12.0-rc.1 // indirect
 	github.com/VividCortex/ewma v1.2.0 // indirect
 	github.com/acarl005/stripansi v0.0.0-20180116102854-5a71ef0e047d // indirect
-	github.com/beorn7/perks v1.0.1 // indirect
-	github.com/cespare/xxhash/v2 v2.2.0 // indirect
-	github.com/containerd/cgroups v1.0.3 // indirect
-	github.com/containerd/stargz-snapshotter/estargz v0.12.1 // indirect
-	github.com/containers/libtrust v0.0.0-20200511145503-9c3a6c22cd9a // indirect
-	github.com/cyphar/filepath-securejoin v0.2.3 // indirect
+	github.com/asaskevich/govalidator v0.0.0-20230301143203-a9d515a09cc2 // indirect
+	github.com/containerd/cgroups/v3 v3.0.2 // indirect
+	github.com/containerd/containerd v1.7.9 // indirect
+	github.com/containerd/stargz-snapshotter/estargz v0.15.1 // indirect
+	github.com/containers/libtrust v0.0.0-20230121012942-c1716e8a8d01 // indirect
+	github.com/coreos/go-oidc/v3 v3.7.0 // indirect
+	github.com/cyberphone/json-canonicalization v0.0.0-20231011164504-785e29786b46 // indirect
+	github.com/cyphar/filepath-securejoin v0.2.4 // indirect
 	github.com/davecgh/go-spew v1.1.1 // indirect
-	github.com/docker/distribution v2.8.1+incompatible // indirect
-	github.com/docker/docker-credential-helpers v0.7.0 // indirect
+	github.com/distribution/reference v0.5.0 // indirect
+	github.com/docker/docker v24.0.7+incompatible // indirect
+	github.com/docker/docker-credential-helpers v0.8.0 // indirect
 	github.com/docker/go-connections v0.4.0 // indirect
-	github.com/docker/go-metrics v0.0.1 // indirect
 	github.com/docker/go-units v0.5.0 // indirect
 	github.com/dsnet/compress v0.0.2-0.20210315054119-f66993602bf5 // indirect
-	github.com/ghodss/yaml v1.0.0 // indirect
-	github.com/go-jose/go-jose/v3 v3.0.3 // indirect
+	github.com/go-jose/go-jose/v3 v3.0.1 // indirect
+	github.com/go-logr/logr v1.3.0 // indirect
+	github.com/go-logr/stdr v1.2.2 // indirect
+	github.com/go-openapi/analysis v0.21.4 // indirect
+	github.com/go-openapi/errors v0.20.4 // indirect
+	github.com/go-openapi/jsonpointer v0.19.6 // indirect
+	github.com/go-openapi/jsonreference v0.20.2 // indirect
+	github.com/go-openapi/loads v0.21.2 // indirect
+	github.com/go-openapi/runtime v0.26.0 // indirect
+	github.com/go-openapi/spec v0.20.9 // indirect
+	github.com/go-openapi/strfmt v0.21.7 // indirect
+	github.com/go-openapi/swag v0.22.4 // indirect
+	github.com/go-openapi/validate v0.22.1 // indirect
 	github.com/gogo/protobuf v1.3.2 // indirect
 	github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da // indirect
-	github.com/golang/protobuf v1.5.2 // indirect
-	github.com/google/go-containerregistry v0.13.0 // indirect
+	github.com/golang/protobuf v1.5.3 // indirect
+	github.com/google/go-containerregistry v0.16.1 // indirect
 	github.com/google/go-intervals v0.0.2 // indirect
-	github.com/google/uuid v1.3.0 // indirect
+	github.com/google/uuid v1.3.1 // indirect
 	github.com/gorilla/mux v1.8.0 // indirect
 	github.com/hashicorp/errwrap v1.1.0 // indirect
+	github.com/hashicorp/go-cleanhttp v0.5.2 // indirect
 	github.com/hashicorp/go-multierror v1.1.1 // indirect
-	github.com/imdario/mergo v0.3.13 // indirect
-	github.com/inconshreveable/mousetrap v1.0.1 // indirect
+	github.com/hashicorp/go-retryablehttp v0.7.5 // indirect
+	github.com/inconshreveable/mousetrap v1.1.0 // indirect
+	github.com/josharian/intern v1.0.0 // indirect
 	github.com/json-iterator/go v1.1.12 // indirect
-	github.com/klauspost/compress v1.15.11 // indirect
-	github.com/klauspost/pgzip v1.2.5 // indirect
-	github.com/kr/pretty v0.2.1 // indirect
-	github.com/kr/text v0.2.0 // indirect
-	github.com/letsencrypt/boulder v0.0.0-20230130200452-c091e64aa391 // indirect
-	github.com/mattn/go-runewidth v0.0.13 // indirect
+	github.com/klauspost/compress v1.17.3 // indirect
+	github.com/klauspost/pgzip v1.2.6 // indirect
+	github.com/letsencrypt/boulder v0.0.0-20230213213521-fdfea0d469b6 // indirect
+	github.com/mailru/easyjson v0.7.7 // indirect
+	github.com/mattn/go-runewidth v0.0.15 // indirect
 	github.com/mattn/go-shellwords v1.0.12 // indirect
-	github.com/matttproud/golang_protobuf_extensions v1.0.2-0.20181231171920-c182affec369 // indirect
+	github.com/mattn/go-sqlite3 v1.14.18 // indirect
 	github.com/miekg/pkcs11 v1.1.1 // indirect
-	github.com/mistifyio/go-zfs v2.1.2-0.20190413222219-f784269be439+incompatible // indirect
-	github.com/moby/sys/mountinfo v0.6.2 // indirect
+	github.com/mistifyio/go-zfs/v3 v3.0.1 // indirect
+	github.com/mitchellh/mapstructure v1.5.0 // indirect
+	github.com/moby/sys/mountinfo v0.7.1 // indirect
 	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
 	github.com/modern-go/reflect2 v1.0.2 // indirect
-	github.com/opencontainers/runc v1.1.3 // indirect
-	github.com/opencontainers/runtime-spec v1.0.3-0.20210326190908-1c3f411f0417 // indirect
-	github.com/opencontainers/selinux v1.10.1 // indirect
+	github.com/oklog/ulid v1.3.1 // indirect
+	github.com/opencontainers/runc v1.1.10 // indirect
+	github.com/opencontainers/runtime-spec v1.1.0 // indirect
+	github.com/opencontainers/selinux v1.11.0 // indirect
+	github.com/opentracing/opentracing-go v1.2.0 // indirect
 	github.com/ostreedev/ostree-go v0.0.0-20210805093236-719684c64e4f // indirect
 	github.com/pkg/errors v0.9.1 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
 	github.com/proglottis/gpgme v0.1.3 // indirect
-	github.com/prometheus/client_golang v1.13.0 // indirect
-	github.com/prometheus/client_model v0.3.0 // indirect
-	github.com/prometheus/common v0.37.0 // indirect
-	github.com/prometheus/procfs v0.8.0 // indirect
-	github.com/rivo/uniseg v0.2.0 // indirect
+	github.com/rivo/uniseg v0.4.4 // indirect
 	github.com/russross/blackfriday v2.0.0+incompatible // indirect
-	github.com/sigstore/sigstore v1.5.2 // indirect
+	github.com/secure-systems-lab/go-securesystemslib v0.7.0 // indirect
+	github.com/segmentio/ksuid v1.0.4 // indirect
+	github.com/sigstore/fulcio v1.4.3 // indirect
+	github.com/sigstore/rekor v1.2.2 // indirect
+	github.com/sigstore/sigstore v1.7.5 // indirect
+	github.com/skratchdot/open-golang v0.0.0-20200116055534-eef842397966 // indirect
 	github.com/stefanberger/go-pkcs11uri v0.0.0-20201008174630-78d3cae3a980 // indirect
-	github.com/sylabs/sif/v2 v2.7.1 // indirect
-	github.com/tchap/go-patricia v2.3.0+incompatible // indirect
-	github.com/theupdateframework/go-tuf v0.5.2-0.20220930112810-3890c1e7ace4 // indirect
+	github.com/sylabs/sif/v2 v2.15.0 // indirect
+	github.com/tchap/go-patricia/v2 v2.3.1 // indirect
 	github.com/titanous/rocacheck v0.0.0-20171023193734-afe73141d399 // indirect
-	github.com/ulikunitz/xz v0.5.10 // indirect
-	github.com/vbatts/tar-split v0.11.2 // indirect
-	github.com/vbauerster/mpb/v7 v7.4.2 // indirect
+	github.com/ulikunitz/xz v0.5.11 // indirect
+	github.com/vbatts/tar-split v0.11.5 // indirect
+	github.com/vbauerster/mpb/v8 v8.6.2 // indirect
 	github.com/xeipuuv/gojsonpointer v0.0.0-20190905194746-02993c407bfb // indirect
 	github.com/xeipuuv/gojsonreference v0.0.0-20180127040603-bd5ef7bd5415 // indirect
 	github.com/xeipuuv/gojsonschema v1.2.0 // indirect
-	go.etcd.io/bbolt v1.3.6 // indirect
-	go.mozilla.org/pkcs7 v0.0.0-20200128120323-432b2356ecb1 // indirect
+	go.mongodb.org/mongo-driver v1.11.3 // indirect
+	go.mozilla.org/pkcs7 v0.0.0-20210826202110-33d05740a352 // indirect
 	go.opencensus.io v0.24.0 // indirect
-	golang.org/x/crypto v0.19.0 // indirect
-	golang.org/x/mod v0.8.0 // indirect
-	golang.org/x/net v0.10.0 // indirect
-	golang.org/x/sync v0.1.0 // indirect
-	golang.org/x/sys v0.17.0 // indirect
+	go.opentelemetry.io/otel v1.19.0 // indirect
+	go.opentelemetry.io/otel/metric v1.19.0 // indirect
+	go.opentelemetry.io/otel/trace v1.19.0 // indirect
+	golang.org/x/crypto v0.15.0 // indirect
+	golang.org/x/mod v0.13.0 // indirect
+	golang.org/x/net v0.18.0 // indirect
+	golang.org/x/oauth2 v0.14.0 // indirect
+	golang.org/x/sync v0.5.0 // indirect
+	golang.org/x/sys v0.14.0 // indirect
 	golang.org/x/text v0.14.0 // indirect
-	golang.org/x/tools v0.6.0 // indirect
-	google.golang.org/genproto v0.0.0-20230209215440-0dfe4f8abfcc // indirect
-	google.golang.org/grpc v1.53.0 // indirect
-	google.golang.org/protobuf v1.28.1 // indirect
-	gopkg.in/go-jose/go-jose.v2 v2.6.3 // indirect
-	gopkg.in/yaml.v3 v3.0.1 // indirect
+	golang.org/x/tools v0.14.0 // indirect
+	google.golang.org/appengine v1.6.8 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20230920204549-e6e6cdab5c13 // indirect
+	google.golang.org/grpc v1.58.3 // indirect
+	google.golang.org/protobuf v1.31.0 // indirect
+	gopkg.in/go-jose/go-jose.v2 v2.6.1 // indirect
+	gopkg.in/yaml.v2 v2.4.0 // indirect
 )

hack/make.sh

@@ -1,92 +0,0 @@
-#!/usr/bin/env bash
-set -e
-
-# This script builds various binary from a checkout of the skopeo
-# source code. DO NOT CALL THIS SCRIPT DIRECTLY.
-#
-# Requirements:
-# - The current directory should be a checkout of the skopeo source code
-#   (https://github.com/containers/skopeo). Whatever version is checked out
-#   will be built.
-# - The script is intended to be run inside the container specified
-#   in the output of hack/get_fqin.sh
-# - The right way to call this script is to invoke "make" from
-#   your checkout of the skopeo repository.
-#   the Makefile will do a "docker build -t skopeo ." and then
-#   "docker run hack/make.sh" in the resulting image.
-#
-
-set -o pipefail
-
-export SKOPEO_PKG='github.com/containers/skopeo'
-export SCRIPTDIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
-export MAKEDIR="$SCRIPTDIR/make"
-
-# Set this to 1 to enable installation/modification of environment/services
-export SKOPEO_CONTAINER_TESTS=${SKOPEO_CONTAINER_TESTS:-0}
-
-if [[ "$SKOPEO_CONTAINER_TESTS" == "0" ]] && [[ "$CI" != "true" ]]; then
-    (
-    echo "***************************************************************"
-    echo "WARNING: Executing tests directly on the local development"
-    echo "         host is highly discouraged.  Many important items"
-    echo "         will be skipped.  For manual execution, please utilize"
-    echo "         the Makefile targets WITHOUT the '-local' suffix."
-    echo "***************************************************************"
-    ) > /dev/stderr
-    sleep 5s
-fi
-
-echo
-
-# List of bundles to create when no argument is passed
-# TODO(runcom): these are the one left from Docker...for now
-# test-unit
-# validate-dco
-# cover
-DEFAULT_BUNDLES=(
-	validate-gofmt
-	validate-lint
-	validate-vet
-	validate-git-marks
-
-	test-integration
-)
-
-# Go module support: set `-mod=vendor` to use the vendored sources
-# See also the top-level Makefile.
-mod_vendor=
-if go help mod >/dev/null 2>&1; then
-  export GO111MODULE=on
-  mod_vendor='-mod=vendor'
-fi
-
-go_test_dir() {
-	dir=$1
-	(
-		echo '+ go test' $mod_vendor $TESTFLAGS ${BUILDTAGS:+-tags "$BUILDTAGS"} "${SKOPEO_PKG}${dir#.}"
-		cd "$dir"
-		export DEST="$ABS_DEST" # we're in a subshell, so this is safe -- our integration-cli tests need DEST, and "cd" screws it up
-		go test $mod_vendor $TESTFLAGS ${BUILDTAGS:+-tags "$BUILDTAGS"}
-	)
-}
-
-bundle() {
-	local bundle="$1"; shift
-	echo "---> Making bundle: $(basename "$bundle")"
-	source "$SCRIPTDIR/make/$bundle" "$@"
-}
-
-main() {
-	if [ $# -lt 1 ]; then
-		bundles=(${DEFAULT_BUNDLES[@]})
-	else
-		bundles=($@)
-	fi
-	for bundle in ${bundles[@]}; do
-		bundle "$bundle"
-		echo
-	done
-}
-
-main "$@"

hack/make/.validate

@@ -1,31 +0,0 @@
-#!/bin/bash
-
-if [ -z "$VALIDATE_UPSTREAM" ]; then
-	# this is kind of an expensive check, so let's not do this twice if we
-	# are running more than one validate bundlescript
-	
-	VALIDATE_REPO='https://github.com/containers/skopeo.git'
-	VALIDATE_BRANCH='main'
-	
-	if [ "$TRAVIS" = 'true' -a "$TRAVIS_PULL_REQUEST" != 'false' ]; then
-		VALIDATE_REPO="https://github.com/${TRAVIS_REPO_SLUG}.git"
-		VALIDATE_BRANCH="${TRAVIS_BRANCH}"
-	fi
-	
-	VALIDATE_HEAD="$(git rev-parse --verify HEAD)"
-	
-	git fetch -q "$VALIDATE_REPO" "refs/heads/$VALIDATE_BRANCH"
-	VALIDATE_UPSTREAM="$(git rev-parse --verify FETCH_HEAD)"
-	
-	VALIDATE_COMMIT_LOG="$VALIDATE_UPSTREAM..$VALIDATE_HEAD"
-	VALIDATE_COMMIT_DIFF="$VALIDATE_UPSTREAM...$VALIDATE_HEAD"
-	
-	validate_diff() {
-		git diff "$VALIDATE_UPSTREAM" "$@"
-	}
-	validate_log() {
-		if [ "$VALIDATE_UPSTREAM" != "$VALIDATE_HEAD" ]; then
-			git log "$VALIDATE_COMMIT_LOG" "$@"
-		fi
-	}
-fi

hack/make/test-integration

@@ -1,12 +0,0 @@
-#!/bin/bash
-set -e
-
-bundle_test_integration() {
-	go_test_dir ./integration
-}
-
-# subshell so that we can export PATH without breaking other things
-(
-	make PREFIX=/usr install
-	bundle_test_integration
-) 2>&1

hack/make/test-system

@@ -1,24 +0,0 @@
-#!/bin/bash
-set -e
-
-# These tests can run in/outside of a container.  However,
-# not all storage drivers are supported in a container
-# environment.  Detect this and setup storage when
-# running in a container.
-if ((SKOPEO_CONTAINER_TESTS)) && [[ -r /etc/containers/storage.conf ]]; then
-    sed -i \
-        -e 's/^driver\s*=.*/driver = "vfs"/' \
-        -e 's/^mountopt/#mountopt/' \
-        /etc/containers/storage.conf
-elif ((SKOPEO_CONTAINER_TESTS)); then
-    cat >> /etc/containers/storage.conf << EOF
-[storage]
-driver = "vfs"
-EOF
-fi
-
-# Build skopeo, install into /usr/bin
-make PREFIX=/usr install
-
-# Run tests
-SKOPEO_BINARY=/usr/bin/skopeo bats --tap systemtest

hack/make/validate-git-marks

@@ -1,44 +0,0 @@
-#!/usr/bin/env bash
-
-source "$(dirname "$BASH_SOURCE")/.validate"
-
-# folders=$(find * -type d | egrep -v '^Godeps|bundles|.git')
-
-IFS=$'\n'
-files=( $(validate_diff --diff-filter=ACMR --name-only -- '*' | grep -v '^vendor/' || true) )
-unset IFS
-
-badFiles=()
-for f in "${files[@]}"; do
-    if [ $(grep -r "^<<<<<<<" $f) ]; then
-        badFiles+=( "$f" )
-        continue
-    fi
-
-    if [ $(grep -r "^>>>>>>>" $f) ]; then
-        badFiles+=( "$f" )
-        continue
-    fi
-
-    if [ $(grep -r "^=======$" $f) ]; then
-        badFiles+=( "$f" )
-        continue
-    fi
-    set -e
-done
-
-
-if [ ${#badFiles[@]} -eq 0 ]; then
-	echo 'Congratulations!  There is no conflict.'
-else
-	{
-		echo "There is trace of conflict(s) in the following files :"
-		for f in "${badFiles[@]}"; do
-			echo " - $f"
-		done
-		echo
-		echo 'Please fix the conflict(s) commit the result.'
-		echo
-	} >&2
-	false
-fi

hack/make/validate-lint

@@ -1,33 +0,0 @@
-#!/bin/bash
-
-source "$(dirname "$BASH_SOURCE")/.validate"
-
-# We will eventually get to the point where packages should be the complete list
-# of subpackages, vendoring excluded, as given by:
-#
-IFS=$'\n'
-files=( $(validate_diff --diff-filter=ACMR --name-only -- '*.go' | grep -v '^vendor/\|^integration' || true) )
-unset IFS
-
-errors=()
-for f in "${files[@]}"; do
-	failedLint=$(golint "$f")
-	if [ "$failedLint" ]; then
-		errors+=( "$failedLint" )
-	fi
-done
-
-if [ ${#errors[@]} -eq 0 ]; then
-	echo 'Congratulations!  All Go source files have been linted.'
-else
-	{
-		echo "Errors from golint:"
-		for err in "${errors[@]}"; do
-			echo "$err"
-		done
-		echo
-		echo 'Please fix the above errors. You can test via "golint" and commit the result.'
-		echo
-	} >&2
-	false
-fi

hack/test-integration.sh

@@ -0,0 +1,8 @@
+#!/bin/bash
+set -e
+
+make PREFIX=/usr install
+
+echo "cd ./integration;" go test $TESTFLAGS ${BUILDTAGS:+-tags "$BUILDTAGS"}
+cd ./integration
+go test $TESTFLAGS ${BUILDTAGS:+-tags "$BUILDTAGS"}

hack/test-system.sh

@@ -0,0 +1,44 @@
+#!/bin/bash
+set -e
+
+# These tests can run in/outside of a container.  However,
+# not all storage drivers are supported in a container
+# environment.  Detect this and setup storage when
+# running in a container.
+#
+# Paradoxically (FIXME: clean this up), SKOPEO_CONTAINER_TESTS is set
+# both inside a container and without a container (in a CI VM); it actually means
+# "it is safe to desctructively modify the system for tests".
+#
+# On a CI VM, we can just use Podman as it is already configured; the changes below,
+# to use VFS, are necessary only inside a container, because overlay-inside-overlay
+# does not work. So, make these changes conditional on both
+# SKOPEO_CONTAINER_TESTS (for acceptability to do destructive modification) and !CI
+# (for necessity to adjust for in-container operation)
+if ((SKOPEO_CONTAINER_TESTS)) && [[ "$CI" != true ]]; then
+    if [[ -r /etc/containers/storage.conf ]]; then
+        echo "MODIFYING existing storage.conf"
+        sed -i \
+            -e 's/^driver\s*=.*/driver = "vfs"/' \
+            -e 's/^mountopt/#mountopt/' \
+            /etc/containers/storage.conf
+    else
+        echo "CREATING NEW storage.conf"
+        cat >> /etc/containers/storage.conf << EOF
+[storage]
+driver = "vfs"
+runroot = "/run/containers/storage"
+graphroot = "/var/lib/containers/storage"
+EOF
+    fi
+    # The logic of finding the relevant storage.conf file is convoluted
+    # and in effect differs between Skopeo and Podman, at least in some versions;
+    # explicitly point at the file we want to use to hopefully avoid that.
+    export CONTAINERS_STORAGE_CONF=/etc/containers/storage.conf
+fi
+
+# Build skopeo, install into /usr/bin
+make PREFIX=/usr install
+
+# Run tests
+SKOPEO_BINARY=/usr/bin/skopeo bats --tap systemtest

hack/validate-git-marks.sh

@@ -0,0 +1,30 @@
+#!/usr/bin/env bash
+
+IFS=$'\n'
+files=( $(git ls-tree -r HEAD --name-only | grep -v '^vendor/' || true) )
+unset IFS
+
+badFiles=()
+for f in "${files[@]}"; do
+    if [ $(grep -r "^\(<<<<<<<\|>>>>>>>\|^=======$\)" $f) ]; then
+        badFiles+=( "$f" )
+        continue
+    fi
+    set -e
+done
+
+
+if [ ${#badFiles[@]} -eq 0 ]; then
+	echo 'Congratulations!  There is no conflict.'
+else
+	{
+		echo "There is trace of conflict(s) in the following files :"
+		for f in "${badFiles[@]}"; do
+			echo " - $f"
+		done
+		echo
+		echo 'Please fix the conflict(s) commit the result.'
+		echo
+	} >&2
+	exit 1
+fi

hack/validate-gofmt.sh

@@ -1,9 +1,7 @@
 #!/bin/bash
 
-source "$(dirname "$BASH_SOURCE")/.validate"
-
 IFS=$'\n'
-files=( $(validate_diff --diff-filter=ACMR --name-only -- '*.go' | grep -v '^vendor/' || true) )
+files=( $(find . -name '*.go' | grep -v '^./vendor/' | sort || true) )
 unset IFS
 
 badFiles=()
@@ -25,5 +23,5 @@ else
 		echo 'Please reformat the above files using "gofmt -s -w" and commit the result.'
 		echo
 	} >&2
-	false
+	exit 1
 fi

hack/validate-lint.sh

@@ -0,0 +1,16 @@
+#!/bin/bash
+
+errors=$($GOBIN/golangci-lint run --build-tags "${BUILDTAGS}" 2>&1)
+
+if [ -z "$errors" ]; then
+	echo 'Congratulations!  All Go source files have been linted.'
+else
+	{
+		echo "Errors from golangci-lint:"
+		echo "$errors"
+		echo
+		echo 'Please fix the above errors. You can test via "golangci-lint" and commit the result.'
+		echo
+	} >&2
+	exit 1
+fi

hack/validate-vet.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
 
-errors=$(go vet -tags="${BUILDTAGS}" $mod_vendor $(go list $mod_vendor -e ./...))
+errors=$(go vet -tags="${BUILDTAGS}" ./... 2>&1)
 
 if [ -z "$errors" ]; then
 	echo 'Congratulations!  All Go source files have been vetted.'
@@ -12,5 +12,5 @@ else
 		echo 'Please fix the above errors. You can test via "go vet" and commit the result.'
 		echo
 	} >&2
-	false
+	exit 1
 fi

hack/warn-destructive-tests.sh

@@ -0,0 +1,17 @@
+#!/usr/bin/env bash
+set -e
+
+# Set this to 1 to enable installation/modification of environment/services
+export SKOPEO_CONTAINER_TESTS=${SKOPEO_CONTAINER_TESTS:-0}
+
+if [[ "$SKOPEO_CONTAINER_TESTS" == "0" ]] && [[ "$CI" != "true" ]]; then
+    (
+    echo "***************************************************************"
+    echo "WARNING: Executing tests directly on the local development"
+    echo "         host is highly discouraged.  Many important items"
+    echo "         will be skipped.  For manual execution, please utilize"
+    echo "         the Makefile targets WITHOUT the '-local' suffix."
+    echo "***************************************************************"
+    ) > /dev/stderr
+    sleep 5
+fi

install.md

@@ -123,7 +123,7 @@ podman run docker://quay.io/skopeo/stable:latest copy --help
 
 Otherwise, read on for building and installing it from source:
 
-To build the `skopeo` binary you need at least Go 1.12.
+To build the `skopeo` binary you need at least Go 1.19.
 
 There are two ways to build skopeo: in a container, or locally without a
 container. Choose the one which better matches your needs and environment.
@@ -174,6 +174,16 @@ document generation can be skipped by passing `DISABLE_DOCS=1`:
 DISABLE_DOCS=1 make
 ```
 
+### Cross-compilation
+
+For cross-building skopeo, use the command `make bin/skopeo.OS.ARCH`, where OS represents
+the target operating system and ARCH stands for the desired architecture. For instance,
+to build skopeo for RISC-V 64-bit Linux, execute:
+
+```bash
+make bin/skopeo.linux.riscv64
+```
+
 ### Building documentation
 
 To build the manual you will need go-md2man.
@@ -235,15 +245,8 @@ There have been efforts in the past to produce and maintain static builds, but t
 
 That being said, if you would like to build Skopeo statically, you might be able to do it by combining all the following steps.
 - Export environment variable `CGO_ENABLED=0` (disabling CGO causes Go to prefer native libraries when possible, instead of dynamically linking against system libraries).
-- Set the `BUILDTAGS=containers_image_openpgp` Make variable (this remove the dependency on `libgpgme` and its companion libraries).
-- Clear the `GO_DYN_FLAGS` Make variable (which otherwise seems to force the creation of a dynamic executable).
-
-The following command implements these steps to produce a static binary in the `bin` subdirectory of the repository:
-
-```bash
-docker run -v $PWD:/src -w /src -e CGO_ENABLED=0 golang \
-make BUILDTAGS=containers_image_openpgp GO_DYN_FLAGS=
-```
+- Set the `BUILDTAGS=containers_image_openpgp` Make variable (this removes the dependency on `libgpgme` and its companion libraries).
+- Clear the `GO_DYN_FLAGS` Make variable if even a dependency on the ELF interpreter is undesirable.
 
 Keep in mind that the resulting binary is unsupported and might crash randomly. Only use if you know what you're doing!
 

integration/blocked_test.go

@@ -1,34 +1,34 @@
 package main
 
-import (
-	"gopkg.in/check.v1"
-)
-
 const blockedRegistriesConf = "./fixtures/blocked-registries.conf"
 const blockedErrorRegex = `.*registry registry-blocked.com is blocked in .*`
 
-func (s *SkopeoSuite) TestCopyBlockedSource(c *check.C) {
-	assertSkopeoFails(c, blockedErrorRegex,
+func (s *skopeoSuite) TestCopyBlockedSource() {
+	t := s.T()
+	assertSkopeoFails(t, blockedErrorRegex,
 		"--registries-conf", blockedRegistriesConf, "copy",
 		"docker://registry-blocked.com/image:test",
 		"docker://registry-unblocked.com/image:test")
 }
 
-func (s *SkopeoSuite) TestCopyBlockedDestination(c *check.C) {
-	assertSkopeoFails(c, blockedErrorRegex,
+func (s *skopeoSuite) TestCopyBlockedDestination() {
+	t := s.T()
+	assertSkopeoFails(t, blockedErrorRegex,
 		"--registries-conf", blockedRegistriesConf, "copy",
 		"docker://registry-unblocked.com/image:test",
 		"docker://registry-blocked.com/image:test")
 }
 
-func (s *SkopeoSuite) TestInspectBlocked(c *check.C) {
-	assertSkopeoFails(c, blockedErrorRegex,
+func (s *skopeoSuite) TestInspectBlocked() {
+	t := s.T()
+	assertSkopeoFails(t, blockedErrorRegex,
 		"--registries-conf", blockedRegistriesConf, "inspect",
 		"docker://registry-blocked.com/image:test")
 }
 
-func (s *SkopeoSuite) TestDeleteBlocked(c *check.C) {
-	assertSkopeoFails(c, blockedErrorRegex,
+func (s *skopeoSuite) TestDeleteBlocked() {
+	t := s.T()
+	assertSkopeoFails(t, blockedErrorRegex,
 		"--registries-conf", blockedRegistriesConf, "delete",
 		"docker://registry-blocked.com/image:test")
 }

integration/check_test.go

@@ -6,7 +6,9 @@ import (
 	"testing"
 
 	"github.com/containers/skopeo/version"
-	"gopkg.in/check.v1"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+	"github.com/stretchr/testify/suite"
 )
 
 const (
@@ -14,100 +16,104 @@ const (
 	privateRegistryURL1 = "127.0.0.1:5001"
 )
 
-func Test(t *testing.T) {
-	check.TestingT(t)
+func TestSkopeo(t *testing.T) {
+	suite.Run(t, &skopeoSuite{})
 }
 
-func init() {
-	check.Suite(&SkopeoSuite{})
-}
-
-type SkopeoSuite struct {
+type skopeoSuite struct {
+	suite.Suite
 	regV2         *testRegistryV2
 	regV2WithAuth *testRegistryV2
 }
 
-func (s *SkopeoSuite) SetUpSuite(c *check.C) {
+var _ = suite.SetupAllSuite(&skopeoSuite{})
+var _ = suite.TearDownAllSuite(&skopeoSuite{})
+
+func (s *skopeoSuite) SetupSuite() {
+	t := s.T()
 	_, err := exec.LookPath(skopeoBinary)
-	c.Assert(err, check.IsNil)
-	s.regV2 = setupRegistryV2At(c, privateRegistryURL0, false, false)
-	s.regV2WithAuth = setupRegistryV2At(c, privateRegistryURL1, true, false)
+	require.NoError(t, err)
+	s.regV2 = setupRegistryV2At(t, privateRegistryURL0, false, false)
+	s.regV2WithAuth = setupRegistryV2At(t, privateRegistryURL1, true, false)
 }
 
-func (s *SkopeoSuite) TearDownSuite(c *check.C) {
+func (s *skopeoSuite) TearDownSuite() {
 	if s.regV2 != nil {
-		s.regV2.tearDown(c)
+		s.regV2.tearDown()
 	}
 	if s.regV2WithAuth != nil {
-		//cmd := exec.Command("docker", "logout", s.regV2WithAuth)
-		//c.Assert(cmd.Run(), check.IsNil)
-		s.regV2WithAuth.tearDown(c)
+		// cmd := exec.Command("docker", "logout", s.regV2WithAuth)
+		// require.Noerror(t, cmd.Run())
+		s.regV2WithAuth.tearDown()
 	}
 }
 
-// TODO like dockerCmd but much easier, just out,err
-//func skopeoCmd()
-
-func (s *SkopeoSuite) TestVersion(c *check.C) {
-	wanted := fmt.Sprintf(".*%s version %s.*", skopeoBinary, version.Version)
-	assertSkopeoSucceeds(c, wanted, "--version")
+func (s *skopeoSuite) TestVersion() {
+	t := s.T()
+	assertSkopeoSucceeds(t, fmt.Sprintf(".*%s version %s.*", skopeoBinary, version.Version),
+		"--version")
 }
 
-func (s *SkopeoSuite) TestCanAuthToPrivateRegistryV2WithoutDockerCfg(c *check.C) {
-	wanted := ".*manifest unknown: manifest unknown.*"
-	assertSkopeoFails(c, wanted, "--tls-verify=false", "inspect", "--creds="+s.regV2WithAuth.username+":"+s.regV2WithAuth.password, fmt.Sprintf("docker://%s/busybox:latest", s.regV2WithAuth.url))
+func (s *skopeoSuite) TestCanAuthToPrivateRegistryV2WithoutDockerCfg() {
+	t := s.T()
+	assertSkopeoFails(t, ".*manifest unknown.*",
+		"--tls-verify=false", "inspect", "--creds="+s.regV2WithAuth.username+":"+s.regV2WithAuth.password, fmt.Sprintf("docker://%s/busybox:latest", s.regV2WithAuth.url))
 }
 
-func (s *SkopeoSuite) TestNeedAuthToPrivateRegistryV2WithoutDockerCfg(c *check.C) {
-	wanted := ".*unauthorized: authentication required.*"
-	assertSkopeoFails(c, wanted, "--tls-verify=false", "inspect", fmt.Sprintf("docker://%s/busybox:latest", s.regV2WithAuth.url))
+func (s *skopeoSuite) TestNeedAuthToPrivateRegistryV2WithoutDockerCfg() {
+	t := s.T()
+	assertSkopeoFails(t, ".*authentication required.*",
+		"--tls-verify=false", "inspect", fmt.Sprintf("docker://%s/busybox:latest", s.regV2WithAuth.url))
 }
 
-func (s *SkopeoSuite) TestCertDirInsteadOfCertPath(c *check.C) {
-	wanted := ".*unknown flag: --cert-path.*"
-	assertSkopeoFails(c, wanted, "--tls-verify=false", "inspect", fmt.Sprintf("docker://%s/busybox:latest", s.regV2WithAuth.url), "--cert-path=/")
-	wanted = ".*unauthorized: authentication required.*"
-	assertSkopeoFails(c, wanted, "--tls-verify=false", "inspect", fmt.Sprintf("docker://%s/busybox:latest", s.regV2WithAuth.url), "--cert-dir=/etc/docker/certs.d/")
+func (s *skopeoSuite) TestCertDirInsteadOfCertPath() {
+	t := s.T()
+	assertSkopeoFails(t, ".*unknown flag: --cert-path.*",
+		"--tls-verify=false", "inspect", fmt.Sprintf("docker://%s/busybox:latest", s.regV2WithAuth.url), "--cert-path=/")
+	assertSkopeoFails(t, ".*authentication required.*",
+		"--tls-verify=false", "inspect", fmt.Sprintf("docker://%s/busybox:latest", s.regV2WithAuth.url), "--cert-dir=/etc/docker/certs.d/")
 }
 
 // TODO(runcom): as soon as we can push to registries ensure you can inspect here
 // not just get image not found :)
-func (s *SkopeoSuite) TestNoNeedAuthToPrivateRegistryV2ImageNotFound(c *check.C) {
+func (s *skopeoSuite) TestNoNeedAuthToPrivateRegistryV2ImageNotFound() {
+	t := s.T()
 	out, err := exec.Command(skopeoBinary, "--tls-verify=false", "inspect", fmt.Sprintf("docker://%s/busybox:latest", s.regV2.url)).CombinedOutput()
-	c.Assert(err, check.NotNil, check.Commentf(string(out)))
-	wanted := ".*manifest unknown.*"
-	c.Assert(string(out), check.Matches, "(?s)"+wanted) // (?s) : '.' will also match newlines
-	wanted = ".*unauthorized: authentication required.*"
-	c.Assert(string(out), check.Not(check.Matches), "(?s)"+wanted) // (?s) : '.' will also match newlines
+	assert.Error(t, err, "%s", string(out))
+	assert.Regexp(t, "(?s).*manifest unknown.*", string(out))                         // (?s) : '.' will also match newlines
+	assert.NotRegexp(t, "(?s).*unauthorized: authentication required.*", string(out)) // (?s) : '.' will also match newlines
 }
 
-func (s *SkopeoSuite) TestInspectFailsWhenReferenceIsInvalid(c *check.C) {
-	assertSkopeoFails(c, `.*Invalid image name.*`, "inspect", "unknown")
+func (s *skopeoSuite) TestInspectFailsWhenReferenceIsInvalid() {
+	t := s.T()
+	assertSkopeoFails(t, `.*Invalid image name.*`, "inspect", "unknown")
 }
 
-func (s *SkopeoSuite) TestLoginLogout(c *check.C) {
-	wanted := "^Login Succeeded!\n$"
-	assertSkopeoSucceeds(c, wanted, "login", "--tls-verify=false", "--username="+s.regV2WithAuth.username, "--password="+s.regV2WithAuth.password, s.regV2WithAuth.url)
+func (s *skopeoSuite) TestLoginLogout() {
+	t := s.T()
+	assertSkopeoSucceeds(t, "^Login Succeeded!\n$",
+		"login", "--tls-verify=false", "--username="+s.regV2WithAuth.username, "--password="+s.regV2WithAuth.password, s.regV2WithAuth.url)
 	// test --get-login returns username
-	wanted = fmt.Sprintf("^%s\n$", s.regV2WithAuth.username)
-	assertSkopeoSucceeds(c, wanted, "login", "--tls-verify=false", "--get-login", s.regV2WithAuth.url)
+	assertSkopeoSucceeds(t, fmt.Sprintf("^%s\n$", s.regV2WithAuth.username),
+		"login", "--tls-verify=false", "--get-login", s.regV2WithAuth.url)
 	// test logout
-	wanted = fmt.Sprintf("^Removed login credentials for %s\n$", s.regV2WithAuth.url)
-	assertSkopeoSucceeds(c, wanted, "logout", s.regV2WithAuth.url)
+	assertSkopeoSucceeds(t, fmt.Sprintf("^Removed login credentials for %s\n$", s.regV2WithAuth.url),
+		"logout", s.regV2WithAuth.url)
 }
 
-func (s *SkopeoSuite) TestCopyWithLocalAuth(c *check.C) {
-	wanted := "^Login Succeeded!\n$"
-	assertSkopeoSucceeds(c, wanted, "login", "--tls-verify=false", "--username="+s.regV2WithAuth.username, "--password="+s.regV2WithAuth.password, s.regV2WithAuth.url)
+func (s *skopeoSuite) TestCopyWithLocalAuth() {
+	t := s.T()
+	assertSkopeoSucceeds(t, "^Login Succeeded!\n$",
+		"login", "--tls-verify=false", "--username="+s.regV2WithAuth.username, "--password="+s.regV2WithAuth.password, s.regV2WithAuth.url)
 	// copy to private registry using local authentication
 	imageName := fmt.Sprintf("docker://%s/busybox:mine", s.regV2WithAuth.url)
-	assertSkopeoSucceeds(c, "", "copy", "--dest-tls-verify=false", testFQIN+":latest", imageName)
+	assertSkopeoSucceeds(t, "", "copy", "--dest-tls-verify=false", testFQIN+":latest", imageName)
 	// inspect from private registry
-	assertSkopeoSucceeds(c, "", "inspect", "--tls-verify=false", imageName)
+	assertSkopeoSucceeds(t, "", "inspect", "--tls-verify=false", imageName)
 	// logout from the registry
-	wanted = fmt.Sprintf("^Removed login credentials for %s\n$", s.regV2WithAuth.url)
-	assertSkopeoSucceeds(c, wanted, "logout", s.regV2WithAuth.url)
+	assertSkopeoSucceeds(t, fmt.Sprintf("^Removed login credentials for %s\n$", s.regV2WithAuth.url),
+		"logout", s.regV2WithAuth.url)
 	// inspect from private registry should fail after logout
-	wanted = ".*unauthorized: authentication required.*"
-	assertSkopeoFails(c, wanted, "inspect", "--tls-verify=false", imageName)
+	assertSkopeoFails(t, ".*authentication required.*",
+		"inspect", "--tls-verify=false", imageName)
 }

integration/openshift.go

@@ -9,10 +9,11 @@ import (
 	"os/exec"
 	"path/filepath"
 	"strings"
+	"testing"
 	"time"
 
-	"github.com/docker/docker/pkg/homedir"
-	"gopkg.in/check.v1"
+	"github.com/containers/storage/pkg/homedir"
+	"github.com/stretchr/testify/require"
 )
 
 var adminKUBECONFIG = map[string]string{
@@ -30,21 +31,21 @@ type openshiftCluster struct {
 // startOpenshiftCluster creates a new openshiftCluster.
 // WARNING: This affects state in users' home directory! Only run
 // in isolated test environment.
-func startOpenshiftCluster(c *check.C) *openshiftCluster {
+func startOpenshiftCluster(t *testing.T) *openshiftCluster {
 	cluster := &openshiftCluster{}
-	cluster.workingDir = c.MkDir()
+	cluster.workingDir = t.TempDir()
 
-	cluster.startMaster(c)
-	cluster.prepareRegistryConfig(c)
-	cluster.startRegistry(c)
-	cluster.ocLoginToProject(c)
-	cluster.dockerLogin(c)
-	cluster.relaxImageSignerPermissions(c)
+	cluster.startMaster(t)
+	cluster.prepareRegistryConfig(t)
+	cluster.startRegistry(t)
+	cluster.ocLoginToProject(t)
+	cluster.dockerLogin(t)
+	cluster.relaxImageSignerPermissions(t)
 
 	return cluster
 }
 
-// clusterCmd creates an exec.Cmd in cluster.workingDir with current environment modified by environment
+// clusterCmd creates an exec.Cmd in cluster.workingDir with current environment modified by environment.
 func (cluster *openshiftCluster) clusterCmd(env map[string]string, name string, args ...string) *exec.Cmd {
 	cmd := exec.Command(name, args...)
 	cmd.Dir = cluster.workingDir
@@ -56,21 +57,20 @@ func (cluster *openshiftCluster) clusterCmd(env map[string]string, name string,
 }
 
 // startMaster starts the OpenShift master (etcd+API server) and waits for it to be ready, or terminates on failure.
-func (cluster *openshiftCluster) startMaster(c *check.C) {
+func (cluster *openshiftCluster) startMaster(t *testing.T) {
 	cmd := cluster.clusterCmd(nil, "openshift", "start", "master")
 	cluster.processes = append(cluster.processes, cmd)
 	stdout, err := cmd.StdoutPipe()
-	c.Assert(err, check.IsNil)
-	// Send both to the same pipe. This might cause the two streams to be mixed up,
+	require.NoError(t, err)
 	// but logging actually goes only to stderr - this primarily ensure we log any
 	// unexpected output to stdout.
 	cmd.Stderr = cmd.Stdout
 	err = cmd.Start()
-	c.Assert(err, check.IsNil)
+	require.NoError(t, err)
 
-	portOpen, terminatePortCheck := newPortChecker(c, 8443)
+	portOpen, terminatePortCheck := newPortChecker(t, 8443)
 	defer func() {
-		c.Logf("Terminating port check")
+		t.Logf("Terminating port check")
 		terminatePortCheck <- true
 	}()
 
@@ -78,12 +78,12 @@ func (cluster *openshiftCluster) startMaster(c *check.C) {
 	logCheckFound := make(chan bool)
 	go func() {
 		defer func() {
-			c.Logf("Log checker exiting")
+			t.Logf("Log checker exiting")
 		}()
 		scanner := bufio.NewScanner(stdout)
 		for scanner.Scan() {
 			line := scanner.Text()
-			c.Logf("Log line: %s", line)
+			t.Logf("Log line: %s", line)
 			if strings.Contains(line, "Started Origin Controllers") {
 				logCheckFound <- true
 				return
@@ -92,7 +92,7 @@ func (cluster *openshiftCluster) startMaster(c *check.C) {
 			// Note: we can block before we get here.
 			select {
 			case <-terminateLogCheck:
-				c.Logf("terminated")
+				t.Logf("terminated")
 				return
 			default:
 				// Do not block here and read the next line.
@@ -101,7 +101,7 @@ func (cluster *openshiftCluster) startMaster(c *check.C) {
 		logCheckFound <- false
 	}()
 	defer func() {
-		c.Logf("Terminating log check")
+		t.Logf("Terminating log check")
 		terminateLogCheck <- true
 	}()
 
@@ -110,26 +110,26 @@ func (cluster *openshiftCluster) startMaster(c *check.C) {
 	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Minute)
 	defer cancel()
 	for !gotPortCheck || !gotLogCheck {
-		c.Logf("Waiting for master")
+		t.Logf("Waiting for master")
 		select {
 		case <-portOpen:
-			c.Logf("port check done")
+			t.Logf("port check done")
 			gotPortCheck = true
 		case found := <-logCheckFound:
-			c.Logf("log check done, found: %t", found)
+			t.Logf("log check done, found: %t", found)
 			if !found {
-				c.Fatal("log check done, success message not found")
+				t.Fatal("log check done, success message not found")
 			}
 			gotLogCheck = true
 		case <-ctx.Done():
-			c.Fatalf("Timed out waiting for master: %v", ctx.Err())
+			t.Fatalf("Timed out waiting for master: %v", ctx.Err())
 		}
 	}
-	c.Logf("OK, master started!")
+	t.Logf("OK, master started!")
 }
 
 // prepareRegistryConfig creates a registry service account and a related k8s client configuration in ${cluster.workingDir}/openshift.local.registry.
-func (cluster *openshiftCluster) prepareRegistryConfig(c *check.C) {
+func (cluster *openshiftCluster) prepareRegistryConfig(t *testing.T) {
 	// This partially mimics the objects created by (oadm registry), except that we run the
 	// server directly as an ordinary process instead of a pod with an implicitly attached service account.
 	saJSON := `{
@@ -140,93 +140,93 @@ func (cluster *openshiftCluster) prepareRegistryConfig(c *check.C) {
 		}
 	}`
 	cmd := cluster.clusterCmd(adminKUBECONFIG, "oc", "create", "-f", "-")
-	runExecCmdWithInput(c, cmd, saJSON)
+	runExecCmdWithInput(t, cmd, saJSON)
 
 	cmd = cluster.clusterCmd(adminKUBECONFIG, "oadm", "policy", "add-cluster-role-to-user", "system:registry", "-z", "registry")
 	out, err := cmd.CombinedOutput()
-	c.Assert(err, check.IsNil, check.Commentf("%s", string(out)))
-	c.Assert(string(out), check.Equals, "cluster role \"system:registry\" added: \"registry\"\n")
+	require.NoError(t, err, "%s", string(out))
+	require.Equal(t, "cluster role \"system:registry\" added: \"registry\"\n", string(out))
 
 	cmd = cluster.clusterCmd(adminKUBECONFIG, "oadm", "create-api-client-config", "--client-dir=openshift.local.registry", "--basename=openshift-registry", "--user=system:serviceaccount:default:registry")
 	out, err = cmd.CombinedOutput()
-	c.Assert(err, check.IsNil, check.Commentf("%s", string(out)))
-	c.Assert(string(out), check.Equals, "")
+	require.NoError(t, err, "%s", string(out))
+	require.Equal(t, "", string(out))
 }
 
 // startRegistry starts the OpenShift registry with configPart on port, waits for it to be ready, and returns the process object, or terminates on failure.
-func (cluster *openshiftCluster) startRegistryProcess(c *check.C, port int, configPath string) *exec.Cmd {
+func (cluster *openshiftCluster) startRegistryProcess(t *testing.T, port uint16, configPath string) *exec.Cmd {
 	cmd := cluster.clusterCmd(map[string]string{
 		"KUBECONFIG":          "openshift.local.registry/openshift-registry.kubeconfig",
 		"DOCKER_REGISTRY_URL": fmt.Sprintf("127.0.0.1:%d", port),
 	}, "dockerregistry", configPath)
-	consumeAndLogOutputs(c, fmt.Sprintf("registry-%d", port), cmd)
+	consumeAndLogOutputs(t, fmt.Sprintf("registry-%d", port), cmd)
 	err := cmd.Start()
-	c.Assert(err, check.IsNil)
+	require.NoError(t, err, "%s")
 
-	portOpen, terminatePortCheck := newPortChecker(c, port)
+	portOpen, terminatePortCheck := newPortChecker(t, port)
 	defer func() {
 		terminatePortCheck <- true
 	}()
-	c.Logf("Waiting for registry to start")
+	t.Logf("Waiting for registry to start")
 	ctx, cancel := context.WithTimeout(context.Background(), 1*time.Minute)
 	defer cancel()
 	select {
 	case <-portOpen:
-		c.Logf("OK, Registry port open")
+		t.Logf("OK, Registry port open")
 	case <-ctx.Done():
-		c.Fatalf("Timed out waiting for registry to start: %v", ctx.Err())
+		t.Fatalf("Timed out waiting for registry to start: %v", ctx.Err())
 	}
 
 	return cmd
 }
 
 // startRegistry starts the OpenShift registry and waits for it to be ready, or terminates on failure.
-func (cluster *openshiftCluster) startRegistry(c *check.C) {
+func (cluster *openshiftCluster) startRegistry(t *testing.T) {
 	// Our “primary” registry
-	cluster.processes = append(cluster.processes, cluster.startRegistryProcess(c, 5000, "/atomic-registry-config.yml"))
+	cluster.processes = append(cluster.processes, cluster.startRegistryProcess(t, 5000, "/atomic-registry-config.yml"))
 
 	// A registry configured with acceptschema2:false
-	schema1Config := fileFromFixture(c, "/atomic-registry-config.yml", map[string]string{
+	schema1Config := fileFromFixture(t, "/atomic-registry-config.yml", map[string]string{
 		"addr: :5000":              "addr: :5005",
 		"rootdirectory: /registry": "rootdirectory: /registry-schema1",
 		// The default configuration currently already contains acceptschema2: false
 	})
 	// Make sure the configuration contains "acceptschema2: false", because eventually it will be enabled upstream and this function will need to be updated.
 	configContents, err := os.ReadFile(schema1Config)
-	c.Assert(err, check.IsNil)
-	c.Assert(string(configContents), check.Matches, "(?s).*acceptschema2: false.*")
-	cluster.processes = append(cluster.processes, cluster.startRegistryProcess(c, 5005, schema1Config))
+	require.NoError(t, err)
+	require.Regexp(t, "(?s).*acceptschema2: false.*", string(configContents))
+	cluster.processes = append(cluster.processes, cluster.startRegistryProcess(t, 5005, schema1Config))
 
 	// A registry configured with acceptschema2:true
-	schema2Config := fileFromFixture(c, "/atomic-registry-config.yml", map[string]string{
+	schema2Config := fileFromFixture(t, "/atomic-registry-config.yml", map[string]string{
 		"addr: :5000":              "addr: :5006",
 		"rootdirectory: /registry": "rootdirectory: /registry-schema2",
 		"acceptschema2: false":     "acceptschema2: true",
 	})
-	cluster.processes = append(cluster.processes, cluster.startRegistryProcess(c, 5006, schema2Config))
+	cluster.processes = append(cluster.processes, cluster.startRegistryProcess(t, 5006, schema2Config))
 }
 
 // ocLogin runs (oc login) and (oc new-project) on the cluster, or terminates on failure.
-func (cluster *openshiftCluster) ocLoginToProject(c *check.C) {
-	c.Logf("oc login")
+func (cluster *openshiftCluster) ocLoginToProject(t *testing.T) {
+	t.Logf("oc login")
 	cmd := cluster.clusterCmd(nil, "oc", "login", "--certificate-authority=openshift.local.config/master/ca.crt", "-u", "myuser", "-p", "mypw", "https://localhost:8443")
 	out, err := cmd.CombinedOutput()
-	c.Assert(err, check.IsNil, check.Commentf("%s", out))
-	c.Assert(string(out), check.Matches, "(?s).*Login successful.*") // (?s) : '.' will also match newlines
+	require.NoError(t, err, "%s", out)
+	require.Regexp(t, "(?s).*Login successful.*", string(out)) // (?s) : '.' will also match newlines
 
-	outString := combinedOutputOfCommand(c, "oc", "new-project", "myns")
-	c.Assert(outString, check.Matches, `(?s).*Now using project "myns".*`) // (?s) : '.' will also match newlines
+	outString := combinedOutputOfCommand(t, "oc", "new-project", "myns")
+	require.Regexp(t, `(?s).*Now using project "myns".*`, outString) // (?s) : '.' will also match newlines
 }
 
 // dockerLogin simulates (docker login) to the cluster, or terminates on failure.
 // We do not run (docker login) directly, because that requires a running daemon and a docker package.
-func (cluster *openshiftCluster) dockerLogin(c *check.C) {
+func (cluster *openshiftCluster) dockerLogin(t *testing.T) {
 	cluster.dockerDir = filepath.Join(homedir.Get(), ".docker")
 	err := os.Mkdir(cluster.dockerDir, 0700)
-	c.Assert(err, check.IsNil)
+	require.NoError(t, err)
 
-	out := combinedOutputOfCommand(c, "oc", "config", "view", "-o", "json", "-o", "jsonpath={.users[*].user.token}")
-	c.Logf("oc config value: %s", out)
+	out := combinedOutputOfCommand(t, "oc", "config", "view", "-o", "json", "-o", "jsonpath={.users[*].user.token}")
+	t.Logf("oc config value: %s", out)
 	authValue := base64.StdEncoding.EncodeToString([]byte("unused:" + out))
 	auths := []string{}
 	for _, port := range []int{5000, 5005, 5006} {
@@ -237,22 +237,22 @@ func (cluster *openshiftCluster) dockerLogin(c *check.C) {
 	}
 	configJSON := `{"auths": {` + strings.Join(auths, ",") + `}}`
 	err = os.WriteFile(filepath.Join(cluster.dockerDir, "config.json"), []byte(configJSON), 0600)
-	c.Assert(err, check.IsNil)
+	require.NoError(t, err)
 }
 
 // relaxImageSignerPermissions opens up the system:image-signer permissions so that
 // anyone can work with signatures
 // FIXME: This also allows anyone to DoS anyone else; this design is really not all
 // that workable, but it is the best we can do for now.
-func (cluster *openshiftCluster) relaxImageSignerPermissions(c *check.C) {
+func (cluster *openshiftCluster) relaxImageSignerPermissions(t *testing.T) {
 	cmd := cluster.clusterCmd(adminKUBECONFIG, "oadm", "policy", "add-cluster-role-to-group", "system:image-signer", "system:authenticated")
 	out, err := cmd.CombinedOutput()
-	c.Assert(err, check.IsNil, check.Commentf("%s", string(out)))
-	c.Assert(string(out), check.Equals, "cluster role \"system:image-signer\" added: \"system:authenticated\"\n")
+	require.NoError(t, err, "%s", string(out))
+	require.Equal(t, "cluster role \"system:image-signer\" added: \"system:authenticated\"\n", string(out))
 }
 
 // tearDown stops the cluster services and deletes (only some!) of the state.
-func (cluster *openshiftCluster) tearDown(c *check.C) {
+func (cluster *openshiftCluster) tearDown(t *testing.T) {
 	for i := len(cluster.processes) - 1; i >= 0; i-- {
 		// It’s undocumented what Kill() returns if the process has terminated,
 		// so we couldn’t check just for that. This is running in a container anyway…
@@ -260,6 +260,6 @@ func (cluster *openshiftCluster) tearDown(c *check.C) {
 	}
 	if cluster.dockerDir != "" {
 		err := os.RemoveAll(cluster.dockerDir)
-		c.Assert(err, check.IsNil)
+		require.NoError(t, err)
 	}
 }

integration/openshift_shell_test.go

@@ -7,7 +7,8 @@ import (
 	"os"
 	"os/exec"
 
-	"gopkg.in/check.v1"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
 )
 
 /*
@@ -15,11 +16,15 @@ TestRunShell is not really a test; it is a convenient way to use the registry se
 in openshift.go and CopySuite to get an interactive environment for experimentation.
 
 To use it, run:
+
 	sudo make shell
+
 to start a container, then within the container:
-	SKOPEO_CONTAINER_TESTS=1 PS1='nested> ' go test -tags openshift_shell -timeout=24h ./integration -v -check.v -check.vv -check.f='CopySuite.TestRunShell'
+
+	SKOPEO_CONTAINER_TESTS=1 PS1='nested> ' go test -tags openshift_shell -timeout=24h ./integration -v -run='copySuite.TestRunShell'
 
 An example of what can be done within the container:
+
 	cd ..; make bin/skopeo PREFIX=/usr install
 	./skopeo --tls-verify=false  copy --sign-by=personal@example.com docker://quay.io/libpod/busybox:latest atomic:localhost:5000/myns/personal:personal
 	oc get istag personal:personal -o json
@@ -29,13 +34,14 @@ An example of what can be done within the container:
 	curl -L -v 'http://localhost:5000/v2/myns/personal/manifests/personal' --header 'Authorization: Bearer $token_from_oauth'
 	curl -L -v 'http://localhost:5000/extensions/v2/myns/personal/signatures/$manifest_digest' --header 'Authorization: Bearer $token_from_oauth'
 */
-func (s *CopySuite) TestRunShell(c *check.C) {
+func (s *copySuite) TestRunShell() {
+	t := s.T()
 	cmd := exec.Command("bash", "-i")
 	tty, err := os.OpenFile("/dev/tty", os.O_RDWR, 0)
-	c.Assert(err, check.IsNil)
+	require.NoError(t, err)
 	cmd.Stdin = tty
 	cmd.Stdout = tty
 	cmd.Stderr = tty
 	err = cmd.Run()
-	c.Assert(err, check.IsNil)
+	assert.NoError(t, err)
 }

integration/procutils.go

@@ -7,6 +7,6 @@ import (
 	"os/exec"
 )
 
-// cmdLifecycleToParentIfPossible tries to exit if the parent process exits (only works on Linux)
+// cmdLifecycleToParentIfPossible tries to exit if the parent process exits (only works on Linux).
 func cmdLifecycleToParentIfPossible(c *exec.Cmd) {
 }

integration/proxy_test.go

@@ -9,16 +9,21 @@ import (
 	"os/exec"
 	"strings"
 	"syscall"
+	"testing"
 	"time"
 
-	"gopkg.in/check.v1"
-
 	"github.com/containers/image/v5/manifest"
 	imgspecv1 "github.com/opencontainers/image-spec/specs-go/v1"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+	"github.com/stretchr/testify/suite"
 )
 
 // This image is known to be x86_64 only right now
-const knownNotManifestListedImage_x8664 = "docker://quay.io/coreos/11bot"
+const knownNotManifestListedImageX8664 = "docker://quay.io/coreos/11bot"
+
+// knownNotExtantImage would be very surprising if it did exist
+const knownNotExtantImage = "docker://quay.io/centos/centos:opensusewindowsubuntu"
 
 const expectedProxySemverMajor = "0.2"
 
@@ -29,7 +34,7 @@ type request struct {
 	// Method is the name of the function
 	Method string `json:"method"`
 	// Args is the arguments (parsed inside the function)
-	Args []interface{} `json:"args"`
+	Args []any `json:"args"`
 }
 
 // reply is copied from proxy.go
@@ -37,7 +42,7 @@ type reply struct {
 	// Success is true if and only if the call succeeded.
 	Success bool `json:"success"`
 	// Value is an arbitrary value (or values, as array/map) returned from the call.
-	Value interface{} `json:"value"`
+	Value any `json:"value"`
 	// PipeID is an index into open pipes, and should be passed to FinishPipe
 	PipeID uint32 `json:"pipeid"`
 	// Error should be non-empty if Success == false
@@ -57,7 +62,7 @@ type pipefd struct {
 	fd *os.File
 }
 
-func (p *proxy) call(method string, args []interface{}) (rval interface{}, fd *pipefd, err error) {
+func (p *proxy) call(method string, args []any) (rval any, fd *pipefd, err error) {
 	req := request{
 		Method: method,
 		Args:   args,
@@ -78,7 +83,7 @@ func (p *proxy) call(method string, args []interface{}) (rval interface{}, fd *p
 	replybuf := make([]byte, maxMsgSize)
 	n, oobn, _, _, err := p.c.ReadMsgUnix(replybuf, oob)
 	if err != nil {
-		err = fmt.Errorf("reading reply: %v", err)
+		err = fmt.Errorf("reading reply: %w", err)
 		return
 	}
 	var reply reply
@@ -96,7 +101,7 @@ func (p *proxy) call(method string, args []interface{}) (rval interface{}, fd *p
 		var scms []syscall.SocketControlMessage
 		scms, err = syscall.ParseSocketControlMessage(oob[:oobn])
 		if err != nil {
-			err = fmt.Errorf("failed to parse control message: %v", err)
+			err = fmt.Errorf("failed to parse control message: %w", err)
 			return
 		}
 		if len(scms) != 1 {
@@ -106,7 +111,7 @@ func (p *proxy) call(method string, args []interface{}) (rval interface{}, fd *p
 		var fds []int
 		fds, err = syscall.ParseUnixRights(&scms[0])
 		if err != nil {
-			err = fmt.Errorf("failed to parse unix rights: %v", err)
+			err = fmt.Errorf("failed to parse unix rights: %w", err)
 			return
 		}
 		fd = &pipefd{
@@ -119,7 +124,7 @@ func (p *proxy) call(method string, args []interface{}) (rval interface{}, fd *p
 	return
 }
 
-func (p *proxy) callNoFd(method string, args []interface{}) (rval interface{}, err error) {
+func (p *proxy) callNoFd(method string, args []any) (rval any, err error) {
 	var fd *pipefd
 	rval, fd, err = p.call(method, args)
 	if err != nil {
@@ -132,7 +137,7 @@ func (p *proxy) callNoFd(method string, args []interface{}) (rval interface{}, e
 	return rval, nil
 }
 
-func (p *proxy) callReadAllBytes(method string, args []interface{}) (rval interface{}, buf []byte, err error) {
+func (p *proxy) callReadAllBytes(method string, args []any) (rval any, buf []byte, err error) {
 	var fd *pipefd
 	rval, fd, err = p.call(method, args)
 	if err != nil {
@@ -150,7 +155,7 @@ func (p *proxy) callReadAllBytes(method string, args []interface{}) (rval interf
 			err:     err,
 		}
 	}()
-	_, err = p.callNoFd("FinishPipe", []interface{}{fd.id})
+	_, err = p.callNoFd("FinishPipe", []any{fd.id})
 	if err != nil {
 		return
 	}
@@ -211,17 +216,12 @@ func newProxy() (*proxy, error) {
 	return p, nil
 }
 
-func init() {
-	check.Suite(&ProxySuite{})
+func TestProxy(t *testing.T) {
+	suite.Run(t, &proxySuite{})
 }
 
-type ProxySuite struct {
-}
-
-func (s *ProxySuite) SetUpSuite(c *check.C) {
-}
-
-func (s *ProxySuite) TearDownSuite(c *check.C) {
+type proxySuite struct {
+	suite.Suite
 }
 
 type byteFetch struct {
@@ -230,7 +230,7 @@ type byteFetch struct {
 }
 
 func runTestGetManifestAndConfig(p *proxy, img string) error {
-	v, err := p.callNoFd("OpenImage", []interface{}{knownNotManifestListedImage_x8664})
+	v, err := p.callNoFd("OpenImage", []any{img})
 	if err != nil {
 		return err
 	}
@@ -239,9 +239,32 @@ func runTestGetManifestAndConfig(p *proxy, img string) error {
 	if !ok {
 		return fmt.Errorf("OpenImage return value is %T", v)
 	}
-	imgid := uint32(imgidv)
+	imgid := uint64(imgidv)
+	if imgid == 0 {
+		return fmt.Errorf("got zero from expected image")
+	}
 
-	_, manifestBytes, err := p.callReadAllBytes("GetManifest", []interface{}{imgid})
+	// Also verify the optional path
+	v, err = p.callNoFd("OpenImageOptional", []any{img})
+	if err != nil {
+		return err
+	}
+
+	imgidv, ok = v.(float64)
+	if !ok {
+		return fmt.Errorf("OpenImageOptional return value is %T", v)
+	}
+	imgid2 := uint64(imgidv)
+	if imgid2 == 0 {
+		return fmt.Errorf("got zero from expected image")
+	}
+
+	_, err = p.callNoFd("CloseImage", []any{imgid2})
+	if err != nil {
+		return err
+	}
+
+	_, manifestBytes, err := p.callReadAllBytes("GetManifest", []any{imgid})
 	if err != nil {
 		return err
 	}
@@ -250,7 +273,7 @@ func runTestGetManifestAndConfig(p *proxy, img string) error {
 		return err
 	}
 
-	_, configBytes, err := p.callReadAllBytes("GetFullConfig", []interface{}{imgid})
+	_, configBytes, err := p.callReadAllBytes("GetFullConfig", []any{imgid})
 	if err != nil {
 		return err
 	}
@@ -269,7 +292,7 @@ func runTestGetManifestAndConfig(p *proxy, img string) error {
 	}
 
 	// Also test this legacy interface
-	_, ctrconfigBytes, err := p.callReadAllBytes("GetConfig", []interface{}{imgid})
+	_, ctrconfigBytes, err := p.callReadAllBytes("GetConfig", []any{imgid})
 	if err != nil {
 		return err
 	}
@@ -284,7 +307,7 @@ func runTestGetManifestAndConfig(p *proxy, img string) error {
 		return fmt.Errorf("No CMD or ENTRYPOINT set")
 	}
 
-	_, err = p.callNoFd("CloseImage", []interface{}{imgid})
+	_, err = p.callNoFd("CloseImage", []any{imgid})
 	if err != nil {
 		return err
 	}
@@ -292,19 +315,43 @@ func runTestGetManifestAndConfig(p *proxy, img string) error {
 	return nil
 }
 
-func (s *ProxySuite) TestProxy(c *check.C) {
-	p, err := newProxy()
-	c.Assert(err, check.IsNil)
-
-	err = runTestGetManifestAndConfig(p, knownNotManifestListedImage_x8664)
+func runTestOpenImageOptionalNotFound(p *proxy, img string) error {
+	v, err := p.callNoFd("OpenImageOptional", []any{img})
 	if err != nil {
-		err = fmt.Errorf("Testing image %s: %v", knownNotManifestListedImage_x8664, err)
+		return err
 	}
-	c.Assert(err, check.IsNil)
+
+	imgidv, ok := v.(float64)
+	if !ok {
+		return fmt.Errorf("OpenImageOptional return value is %T", v)
+	}
+	imgid := uint64(imgidv)
+	if imgid != 0 {
+		return fmt.Errorf("Unexpected optional image id %v", imgid)
+	}
+	return nil
+}
+
+func (s *proxySuite) TestProxy() {
+	t := s.T()
+	p, err := newProxy()
+	require.NoError(t, err)
+
+	err = runTestGetManifestAndConfig(p, knownNotManifestListedImageX8664)
+	if err != nil {
+		err = fmt.Errorf("Testing image %s: %v", knownNotManifestListedImageX8664, err)
+	}
+	assert.NoError(t, err)
 
 	err = runTestGetManifestAndConfig(p, knownListImage)
 	if err != nil {
 		err = fmt.Errorf("Testing image %s: %v", knownListImage, err)
 	}
-	c.Assert(err, check.IsNil)
+	assert.NoError(t, err)
+
+	err = runTestOpenImageOptionalNotFound(p, knownNotExtantImage)
+	if err != nil {
+		err = fmt.Errorf("Testing optional image %s: %v", knownNotExtantImage, err)
+	}
+	assert.NoError(t, err)
 }

integration/registry.go

@@ -6,9 +6,10 @@ import (
 	"os"
 	"os/exec"
 	"path/filepath"
+	"testing"
 	"time"
 
-	"gopkg.in/check.v1"
+	"github.com/stretchr/testify/require"
 )
 
 const (
@@ -24,9 +25,9 @@ type testRegistryV2 struct {
 	email    string
 }
 
-func setupRegistryV2At(c *check.C, url string, auth, schema1 bool) *testRegistryV2 {
-	reg, err := newTestRegistryV2At(c, url, auth, schema1)
-	c.Assert(err, check.IsNil)
+func setupRegistryV2At(t *testing.T, url string, auth, schema1 bool) *testRegistryV2 {
+	reg, err := newTestRegistryV2At(t, url, auth, schema1)
+	require.NoError(t, err)
 
 	// Wait for registry to be ready to serve requests.
 	for i := 0; i != 50; i++ {
@@ -37,13 +38,13 @@ func setupRegistryV2At(c *check.C, url string, auth, schema1 bool) *testRegistry
 	}
 
 	if err != nil {
-		c.Fatal("Timeout waiting for test registry to become available")
+		t.Fatal("Timeout waiting for test registry to become available")
 	}
 	return reg
 }
 
-func newTestRegistryV2At(c *check.C, url string, auth, schema1 bool) (*testRegistryV2, error) {
-	tmp := c.MkDir()
+func newTestRegistryV2At(t *testing.T, url string, auth, schema1 bool) (*testRegistryV2, error) {
+	tmp := t.TempDir()
 	template := `version: 0.1
 loglevel: debug
 storage:
@@ -94,10 +95,10 @@ compatibility:
 		cmd = exec.Command(binaryV2, "serve", confPath)
 	}
 
-	consumeAndLogOutputs(c, fmt.Sprintf("registry-%s", url), cmd)
+	consumeAndLogOutputs(t, fmt.Sprintf("registry-%s", url), cmd)
 	if err := cmd.Start(); err != nil {
 		if os.IsNotExist(err) {
-			c.Skip(err.Error())
+			t.Skip(err.Error())
 		}
 		return nil, err
 	}
@@ -110,20 +111,21 @@ compatibility:
 	}, nil
 }
 
-func (t *testRegistryV2) Ping() error {
+func (r *testRegistryV2) Ping() error {
 	// We always ping through HTTP for our test registry.
-	resp, err := http.Get(fmt.Sprintf("http://%s/v2/", t.url))
+	resp, err := http.Get(fmt.Sprintf("http://%s/v2/", r.url))
 	if err != nil {
 		return err
 	}
+	defer resp.Body.Close()
 	if resp.StatusCode != http.StatusOK && resp.StatusCode != http.StatusUnauthorized {
 		return fmt.Errorf("registry ping replied with an unexpected status code %d", resp.StatusCode)
 	}
 	return nil
 }
 
-func (t *testRegistryV2) tearDown(c *check.C) {
+func (r *testRegistryV2) tearDown() {
 	// It’s undocumented what Kill() returns if the process has terminated,
 	// so we couldn’t check just for that. This is running in a container anyway…
-	_ = t.cmd.Process.Kill()
+	_ = r.cmd.Process.Kill()
 }

integration/signing_test.go

@@ -6,23 +6,28 @@ import (
 	"os"
 	"os/exec"
 	"strings"
+	"testing"
 
 	"github.com/containers/image/v5/signature"
-	"gopkg.in/check.v1"
+	"github.com/stretchr/testify/require"
+	"github.com/stretchr/testify/suite"
 )
 
 const (
 	gpgBinary = "gpg"
 )
 
-func init() {
-	check.Suite(&SigningSuite{})
+func TestSigning(t *testing.T) {
+	suite.Run(t, &signingSuite{})
 }
 
-type SigningSuite struct {
+type signingSuite struct {
+	suite.Suite
 	fingerprint string
 }
 
+var _ = suite.SetupAllSuite(&signingSuite{})
+
 func findFingerprint(lineBytes []byte) (string, error) {
 	lines := string(lineBytes)
 	for _, line := range strings.Split(lines, "\n") {
@@ -34,43 +39,41 @@ func findFingerprint(lineBytes []byte) (string, error) {
 	return "", errors.New("No fingerprint found")
 }
 
-func (s *SigningSuite) SetUpSuite(c *check.C) {
+func (s *signingSuite) SetupSuite() {
+	t := s.T()
 	_, err := exec.LookPath(skopeoBinary)
-	c.Assert(err, check.IsNil)
+	require.NoError(t, err)
 
-	gpgHome := c.MkDir()
-	os.Setenv("GNUPGHOME", gpgHome)
+	gpgHome := t.TempDir()
+	t.Setenv("GNUPGHOME", gpgHome)
 
-	runCommandWithInput(c, "Key-Type: RSA\nName-Real: Testing user\n%no-protection\n%commit\n", gpgBinary, "--homedir", gpgHome, "--batch", "--gen-key")
+	runCommandWithInput(t, "Key-Type: RSA\nName-Real: Testing user\n%no-protection\n%commit\n", gpgBinary, "--homedir", gpgHome, "--batch", "--gen-key")
 
 	lines, err := exec.Command(gpgBinary, "--homedir", gpgHome, "--with-colons", "--no-permission-warning", "--fingerprint").Output()
-	c.Assert(err, check.IsNil)
+	require.NoError(t, err)
 	s.fingerprint, err = findFingerprint(lines)
-	c.Assert(err, check.IsNil)
+	require.NoError(t, err)
 }
 
-func (s *SigningSuite) TearDownSuite(c *check.C) {
-	os.Unsetenv("GNUPGHOME")
-}
-
-func (s *SigningSuite) TestSignVerifySmoke(c *check.C) {
+func (s *signingSuite) TestSignVerifySmoke() {
+	t := s.T()
 	mech, _, err := signature.NewEphemeralGPGSigningMechanism([]byte{})
-	c.Assert(err, check.IsNil)
+	require.NoError(t, err)
 	defer mech.Close()
 	if err := mech.SupportsSigning(); err != nil { // FIXME? Test that verification and policy enforcement works, using signatures from fixtures
-		c.Skip(fmt.Sprintf("Signing not supported: %v", err))
+		t.Skipf("Signing not supported: %v", err)
 	}
 
 	manifestPath := "fixtures/image.manifest.json"
 	dockerReference := "testing/smoketest"
 
 	sigOutput, err := os.CreateTemp("", "sig")
-	c.Assert(err, check.IsNil)
+	require.NoError(t, err)
 	defer os.Remove(sigOutput.Name())
-	assertSkopeoSucceeds(c, "^$", "standalone-sign", "-o", sigOutput.Name(),
+	assertSkopeoSucceeds(t, "^$", "standalone-sign", "-o", sigOutput.Name(),
 		manifestPath, dockerReference, s.fingerprint)
 
-	expected := fmt.Sprintf("^Signature verified, digest %s\n$", TestImageManifestDigest)
-	assertSkopeoSucceeds(c, expected, "standalone-verify", manifestPath,
+	expected := fmt.Sprintf("^Signature verified using fingerprint %s, digest %s\n$", s.fingerprint, TestImageManifestDigest)
+	assertSkopeoSucceeds(t, expected, "standalone-verify", manifestPath,
 		dockerReference, s.fingerprint, sigOutput.Name())
 }

integration/sync_test.go

@@ -9,13 +9,16 @@ import (
 	"path/filepath"
 	"regexp"
 	"strings"
+	"testing"
 
 	"github.com/containers/image/v5/docker"
 	"github.com/containers/image/v5/docker/reference"
 	"github.com/containers/image/v5/manifest"
 	"github.com/containers/image/v5/types"
 	imgspecv1 "github.com/opencontainers/image-spec/specs-go/v1"
-	"gopkg.in/check.v1"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+	"github.com/stretchr/testify/suite"
 )
 
 const (
@@ -33,30 +36,36 @@ const (
 	pullableRepoWithLatestTag = "k8s.gcr.io/pause"
 )
 
-func init() {
-	check.Suite(&SyncSuite{})
+func TestSync(t *testing.T) {
+	suite.Run(t, &syncSuite{})
 }
 
-type SyncSuite struct {
+type syncSuite struct {
+	suite.Suite
 	cluster  *openshiftCluster
 	registry *testRegistryV2
 }
 
-func (s *SyncSuite) SetUpSuite(c *check.C) {
+var _ = suite.SetupAllSuite(&syncSuite{})
+var _ = suite.TearDownAllSuite(&syncSuite{})
+
+func (s *syncSuite) SetupSuite() {
+	t := s.T()
+
 	const registryAuth = false
 	const registrySchema1 = false
 
 	if os.Getenv("SKOPEO_LOCAL_TESTS") == "1" {
-		c.Log("Running tests without a container")
+		t.Log("Running tests without a container")
 		fmt.Printf("NOTE: tests requires a V2 registry at url=%s, with auth=%t, schema1=%t \n", v2DockerRegistryURL, registryAuth, registrySchema1)
 		return
 	}
 
 	if os.Getenv("SKOPEO_CONTAINER_TESTS") != "1" {
-		c.Skip("Not running in a container, refusing to affect user state")
+		t.Skip("Not running in a container, refusing to affect user state")
 	}
 
-	s.cluster = startOpenshiftCluster(c) // FIXME: Set up TLS for the docker registry port instead of using "--tls-verify=false" all over the place.
+	s.cluster = startOpenshiftCluster(t) // FIXME: Set up TLS for the docker registry port instead of using "--tls-verify=false" all over the place.
 
 	for _, stream := range []string{"unsigned", "personal", "official", "naming", "cosigned", "compression", "schema1", "schema2"} {
 		isJSON := fmt.Sprintf(`{
@@ -67,41 +76,42 @@ func (s *SyncSuite) SetUpSuite(c *check.C) {
 			},
 			"spec": {}
 		}`, stream)
-		runCommandWithInput(c, isJSON, "oc", "create", "-f", "-")
+		runCommandWithInput(t, isJSON, "oc", "create", "-f", "-")
 	}
 
 	// FIXME: Set up TLS for the docker registry port instead of using "--tls-verify=false" all over the place.
-	s.registry = setupRegistryV2At(c, v2DockerRegistryURL, registryAuth, registrySchema1)
+	s.registry = setupRegistryV2At(t, v2DockerRegistryURL, registryAuth, registrySchema1)
 
-	gpgHome := c.MkDir()
-	os.Setenv("GNUPGHOME", gpgHome)
+	gpgHome := t.TempDir()
+	t.Setenv("GNUPGHOME", gpgHome)
 
 	for _, key := range []string{"personal", "official"} {
 		batchInput := fmt.Sprintf("Key-Type: RSA\nName-Real: Test key - %s\nName-email: %s@example.com\n%%no-protection\n%%commit\n",
 			key, key)
-		runCommandWithInput(c, batchInput, gpgBinary, "--batch", "--gen-key")
+		runCommandWithInput(t, batchInput, gpgBinary, "--batch", "--gen-key")
 
-		out := combinedOutputOfCommand(c, gpgBinary, "--armor", "--export", fmt.Sprintf("%s@example.com", key))
+		out := combinedOutputOfCommand(t, gpgBinary, "--armor", "--export", fmt.Sprintf("%s@example.com", key))
 		err := os.WriteFile(filepath.Join(gpgHome, fmt.Sprintf("%s-pubkey.gpg", key)),
 			[]byte(out), 0600)
-		c.Assert(err, check.IsNil)
+		require.NoError(t, err)
 	}
 }
 
-func (s *SyncSuite) TearDownSuite(c *check.C) {
+func (s *syncSuite) TearDownSuite() {
+	t := s.T()
 	if os.Getenv("SKOPEO_LOCAL_TESTS") == "1" {
 		return
 	}
 
 	if s.registry != nil {
-		s.registry.tearDown(c)
+		s.registry.tearDown()
 	}
 	if s.cluster != nil {
-		s.cluster.tearDown(c)
+		s.cluster.tearDown(t)
 	}
 }
 
-func assertNumberOfManifestsInSubdirs(c *check.C, dir string, expectedCount int) {
+func assertNumberOfManifestsInSubdirs(t *testing.T, dir string, expectedCount int) {
 	nManifests := 0
 	err := filepath.WalkDir(dir, func(path string, d fs.DirEntry, err error) error {
 		if err != nil {
@@ -113,156 +123,163 @@ func assertNumberOfManifestsInSubdirs(c *check.C, dir string, expectedCount int)
 		}
 		return nil
 	})
-	c.Assert(err, check.IsNil)
-	c.Assert(nManifests, check.Equals, expectedCount)
+	require.NoError(t, err)
+	assert.Equal(t, expectedCount, nManifests)
 }
 
-func (s *SyncSuite) TestDocker2DirTagged(c *check.C) {
-	tmpDir := c.MkDir()
+func (s *syncSuite) TestDocker2DirTagged() {
+	t := s.T()
+	tmpDir := t.TempDir()
 
 	// FIXME: It would be nice to use one of the local Docker registries instead of needing an Internet connection.
 	image := pullableTaggedImage
 	imageRef, err := docker.ParseReference(fmt.Sprintf("//%s", image))
-	c.Assert(err, check.IsNil)
+	require.NoError(t, err)
 	imagePath := imageRef.DockerReference().String()
 
 	dir1 := path.Join(tmpDir, "dir1")
 	dir2 := path.Join(tmpDir, "dir2")
 
 	// sync docker => dir
-	assertSkopeoSucceeds(c, "", "sync", "--scoped", "--src", "docker", "--dest", "dir", image, dir1)
+	assertSkopeoSucceeds(t, "", "sync", "--scoped", "--src", "docker", "--dest", "dir", image, dir1)
 	_, err = os.Stat(path.Join(dir1, imagePath, "manifest.json"))
-	c.Assert(err, check.IsNil)
+	require.NoError(t, err)
 
 	// copy docker => dir
-	assertSkopeoSucceeds(c, "", "copy", "docker://"+image, "dir:"+dir2)
+	assertSkopeoSucceeds(t, "", "copy", "docker://"+image, "dir:"+dir2)
 	_, err = os.Stat(path.Join(dir2, "manifest.json"))
-	c.Assert(err, check.IsNil)
+	require.NoError(t, err)
 
-	out := combinedOutputOfCommand(c, "diff", "-urN", path.Join(dir1, imagePath), dir2)
-	c.Assert(out, check.Equals, "")
+	out := combinedOutputOfCommand(t, "diff", "-urN", path.Join(dir1, imagePath), dir2)
+	assert.Equal(t, "", out)
 }
 
-func (s *SyncSuite) TestDocker2DirTaggedAll(c *check.C) {
-	tmpDir := c.MkDir()
+func (s *syncSuite) TestDocker2DirTaggedAll() {
+	t := s.T()
+	tmpDir := t.TempDir()
 
 	// FIXME: It would be nice to use one of the local Docker registries instead of needing an Internet connection.
 	image := pullableTaggedManifestList
 	imageRef, err := docker.ParseReference(fmt.Sprintf("//%s", image))
-	c.Assert(err, check.IsNil)
+	require.NoError(t, err)
 	imagePath := imageRef.DockerReference().String()
 
 	dir1 := path.Join(tmpDir, "dir1")
 	dir2 := path.Join(tmpDir, "dir2")
 
 	// sync docker => dir
-	assertSkopeoSucceeds(c, "", "sync", "--all", "--scoped", "--src", "docker", "--dest", "dir", image, dir1)
+	assertSkopeoSucceeds(t, "", "sync", "--all", "--scoped", "--src", "docker", "--dest", "dir", image, dir1)
 	_, err = os.Stat(path.Join(dir1, imagePath, "manifest.json"))
-	c.Assert(err, check.IsNil)
+	require.NoError(t, err)
 
 	// copy docker => dir
-	assertSkopeoSucceeds(c, "", "copy", "--all", "docker://"+image, "dir:"+dir2)
+	assertSkopeoSucceeds(t, "", "copy", "--all", "docker://"+image, "dir:"+dir2)
 	_, err = os.Stat(path.Join(dir2, "manifest.json"))
-	c.Assert(err, check.IsNil)
+	require.NoError(t, err)
 
-	out := combinedOutputOfCommand(c, "diff", "-urN", path.Join(dir1, imagePath), dir2)
-	c.Assert(out, check.Equals, "")
+	out := combinedOutputOfCommand(t, "diff", "-urN", path.Join(dir1, imagePath), dir2)
+	assert.Equal(t, "", out)
 }
 
-func (s *SyncSuite) TestPreserveDigests(c *check.C) {
-	tmpDir := c.MkDir()
+func (s *syncSuite) TestPreserveDigests() {
+	t := s.T()
+	tmpDir := t.TempDir()
 
 	// FIXME: It would be nice to use one of the local Docker registries instead of needing an Internet connection.
 	image := pullableTaggedManifestList
 
 	// copy docker => dir
-	assertSkopeoSucceeds(c, "", "copy", "--all", "--preserve-digests", "docker://"+image, "dir:"+tmpDir)
+	assertSkopeoSucceeds(t, "", "copy", "--all", "--preserve-digests", "docker://"+image, "dir:"+tmpDir)
 	_, err := os.Stat(path.Join(tmpDir, "manifest.json"))
-	c.Assert(err, check.IsNil)
+	require.NoError(t, err)
 
-	assertSkopeoFails(c, ".*Instructed to preserve digests.*", "copy", "--all", "--preserve-digests", "--format=oci", "docker://"+image, "dir:"+tmpDir)
+	assertSkopeoFails(t, ".*Instructed to preserve digests.*", "copy", "--all", "--preserve-digests", "--format=oci", "docker://"+image, "dir:"+tmpDir)
 }
 
-func (s *SyncSuite) TestScoped(c *check.C) {
+func (s *syncSuite) TestScoped() {
+	t := s.T()
 	// FIXME: It would be nice to use one of the local Docker registries instead of needing an Internet connection.
 	image := pullableTaggedImage
 	imageRef, err := docker.ParseReference(fmt.Sprintf("//%s", image))
-	c.Assert(err, check.IsNil)
+	require.NoError(t, err)
 	imagePath := imageRef.DockerReference().String()
 
-	dir1 := c.MkDir()
-	assertSkopeoSucceeds(c, "", "sync", "--src", "docker", "--dest", "dir", image, dir1)
+	dir1 := t.TempDir()
+	assertSkopeoSucceeds(t, "", "sync", "--src", "docker", "--dest", "dir", image, dir1)
 	_, err = os.Stat(path.Join(dir1, path.Base(imagePath), "manifest.json"))
-	c.Assert(err, check.IsNil)
+	require.NoError(t, err)
 
-	assertSkopeoSucceeds(c, "", "sync", "--scoped", "--src", "docker", "--dest", "dir", image, dir1)
+	assertSkopeoSucceeds(t, "", "sync", "--scoped", "--src", "docker", "--dest", "dir", image, dir1)
 	_, err = os.Stat(path.Join(dir1, imagePath, "manifest.json"))
-	c.Assert(err, check.IsNil)
+	require.NoError(t, err)
 }
 
-func (s *SyncSuite) TestDirIsNotOverwritten(c *check.C) {
+func (s *syncSuite) TestDirIsNotOverwritten() {
+	t := s.T()
 	// FIXME: It would be nice to use one of the local Docker registries instead of needing an Internet connection.
 	image := pullableRepoWithLatestTag
 	imageRef, err := docker.ParseReference(fmt.Sprintf("//%s", image))
-	c.Assert(err, check.IsNil)
+	require.NoError(t, err)
 	imagePath := imageRef.DockerReference().String()
 
 	// make a copy of the image in the local registry
-	assertSkopeoSucceeds(c, "", "copy", "--dest-tls-verify=false", "docker://"+image, "docker://"+path.Join(v2DockerRegistryURL, reference.Path(imageRef.DockerReference())))
+	assertSkopeoSucceeds(t, "", "copy", "--dest-tls-verify=false", "docker://"+image, "docker://"+path.Join(v2DockerRegistryURL, reference.Path(imageRef.DockerReference())))
 
 	//sync upstream image to dir, not scoped
-	dir1 := c.MkDir()
-	assertSkopeoSucceeds(c, "", "sync", "--src", "docker", "--dest", "dir", image, dir1)
+	dir1 := t.TempDir()
+	assertSkopeoSucceeds(t, "", "sync", "--src", "docker", "--dest", "dir", image, dir1)
 	_, err = os.Stat(path.Join(dir1, path.Base(imagePath), "manifest.json"))
-	c.Assert(err, check.IsNil)
+	require.NoError(t, err)
 
 	//sync local registry image to dir, not scoped
-	assertSkopeoFails(c, ".*Refusing to overwrite destination directory.*", "sync", "--src-tls-verify=false", "--src", "docker", "--dest", "dir", path.Join(v2DockerRegistryURL, reference.Path(imageRef.DockerReference())), dir1)
+	assertSkopeoFails(t, ".*Refusing to overwrite destination directory.*", "sync", "--src-tls-verify=false", "--src", "docker", "--dest", "dir", path.Join(v2DockerRegistryURL, reference.Path(imageRef.DockerReference())), dir1)
 
 	//sync local registry image to dir, scoped
 	imageRef, err = docker.ParseReference(fmt.Sprintf("//%s", path.Join(v2DockerRegistryURL, reference.Path(imageRef.DockerReference()))))
-	c.Assert(err, check.IsNil)
+	require.NoError(t, err)
 	imagePath = imageRef.DockerReference().String()
-	assertSkopeoSucceeds(c, "", "sync", "--scoped", "--src-tls-verify=false", "--src", "docker", "--dest", "dir", path.Join(v2DockerRegistryURL, reference.Path(imageRef.DockerReference())), dir1)
+	assertSkopeoSucceeds(t, "", "sync", "--scoped", "--src-tls-verify=false", "--src", "docker", "--dest", "dir", path.Join(v2DockerRegistryURL, reference.Path(imageRef.DockerReference())), dir1)
 	_, err = os.Stat(path.Join(dir1, imagePath, "manifest.json"))
-	c.Assert(err, check.IsNil)
+	require.NoError(t, err)
 }
 
-func (s *SyncSuite) TestDocker2DirUntagged(c *check.C) {
-	tmpDir := c.MkDir()
+func (s *syncSuite) TestDocker2DirUntagged() {
+	t := s.T()
+	tmpDir := t.TempDir()
 
 	// FIXME: It would be nice to use one of the local Docker registries instead of needing an Internet connection.
 	image := pullableRepo
 	imageRef, err := docker.ParseReference(fmt.Sprintf("//%s", image))
-	c.Assert(err, check.IsNil)
+	require.NoError(t, err)
 	imagePath := imageRef.DockerReference().String()
 
 	dir1 := path.Join(tmpDir, "dir1")
-	assertSkopeoSucceeds(c, "", "sync", "--scoped", "--src", "docker", "--dest", "dir", image, dir1)
+	assertSkopeoSucceeds(t, "", "sync", "--scoped", "--src", "docker", "--dest", "dir", image, dir1)
 
 	sysCtx := types.SystemContext{}
 	tags, err := docker.GetRepositoryTags(context.Background(), &sysCtx, imageRef)
-	c.Assert(err, check.IsNil)
-	c.Check(len(tags), check.Not(check.Equals), 0)
+	require.NoError(t, err)
+	assert.NotZero(t, len(tags))
 
 	nManifests, err := filepath.Glob(path.Join(dir1, path.Dir(imagePath), "*", "manifest.json"))
-	c.Assert(err, check.IsNil)
-	c.Assert(len(nManifests), check.Equals, len(tags))
+	require.NoError(t, err)
+	assert.Len(t, nManifests, len(tags))
 }
 
-func (s *SyncSuite) TestYamlUntagged(c *check.C) {
-	tmpDir := c.MkDir()
+func (s *syncSuite) TestYamlUntagged() {
+	t := s.T()
+	tmpDir := t.TempDir()
 	dir1 := path.Join(tmpDir, "dir1")
 
 	image := pullableRepo
 	imageRef, err := docker.ParseReference(fmt.Sprintf("//%s", image))
-	c.Assert(err, check.IsNil)
+	require.NoError(t, err)
 	imagePath := imageRef.DockerReference().Name()
 
 	sysCtx := types.SystemContext{}
 	tags, err := docker.GetRepositoryTags(context.Background(), &sysCtx, imageRef)
-	c.Assert(err, check.IsNil)
-	c.Check(len(tags), check.Not(check.Equals), 0)
+	require.NoError(t, err)
+	assert.NotZero(t, len(tags))
 
 	yamlConfig := fmt.Sprintf(`
 %s:
@@ -273,8 +290,8 @@ func (s *SyncSuite) TestYamlUntagged(c *check.C) {
 	// sync to the local registry
 	yamlFile := path.Join(tmpDir, "registries.yaml")
 	err = os.WriteFile(yamlFile, []byte(yamlConfig), 0644)
-	c.Assert(err, check.IsNil)
-	assertSkopeoSucceeds(c, "", "sync", "--scoped", "--src", "yaml", "--dest", "docker", "--dest-tls-verify=false", yamlFile, v2DockerRegistryURL)
+	require.NoError(t, err)
+	assertSkopeoSucceeds(t, "", "sync", "--scoped", "--src", "yaml", "--dest", "docker", "--dest-tls-verify=false", yamlFile, v2DockerRegistryURL)
 	// sync back from local registry to a folder
 	os.Remove(yamlFile)
 	yamlConfig = fmt.Sprintf(`
@@ -285,23 +302,24 @@ func (s *SyncSuite) TestYamlUntagged(c *check.C) {
 `, v2DockerRegistryURL, imagePath)
 
 	err = os.WriteFile(yamlFile, []byte(yamlConfig), 0644)
-	c.Assert(err, check.IsNil)
-	assertSkopeoSucceeds(c, "", "sync", "--scoped", "--src", "yaml", "--dest", "dir", yamlFile, dir1)
+	require.NoError(t, err)
+	assertSkopeoSucceeds(t, "", "sync", "--scoped", "--src", "yaml", "--dest", "dir", yamlFile, dir1)
 
 	sysCtx = types.SystemContext{
 		DockerInsecureSkipTLSVerify: types.NewOptionalBool(true),
 	}
 	localImageRef, err := docker.ParseReference(fmt.Sprintf("//%s/%s", v2DockerRegistryURL, imagePath))
-	c.Assert(err, check.IsNil)
+	require.NoError(t, err)
 	localTags, err := docker.GetRepositoryTags(context.Background(), &sysCtx, localImageRef)
-	c.Assert(err, check.IsNil)
-	c.Check(len(localTags), check.Not(check.Equals), 0)
-	c.Assert(len(localTags), check.Equals, len(tags))
-	assertNumberOfManifestsInSubdirs(c, dir1, len(tags))
+	require.NoError(t, err)
+	assert.NotZero(t, len(localTags))
+	assert.Len(t, localTags, len(tags))
+	assertNumberOfManifestsInSubdirs(t, dir1, len(tags))
 }
 
-func (s *SyncSuite) TestYamlRegex2Dir(c *check.C) {
-	tmpDir := c.MkDir()
+func (s *syncSuite) TestYamlRegex2Dir() {
+	t := s.T()
+	tmpDir := t.TempDir()
 	dir1 := path.Join(tmpDir, "dir1")
 
 	yamlConfig := `
@@ -311,17 +329,18 @@ k8s.gcr.io:
 `
 	// the       ↑    regex strings always matches only 2 images
 	var nTags = 2
-	c.Assert(nTags, check.Not(check.Equals), 0)
+	assert.NotZero(t, nTags)
 
 	yamlFile := path.Join(tmpDir, "registries.yaml")
 	err := os.WriteFile(yamlFile, []byte(yamlConfig), 0644)
-	c.Assert(err, check.IsNil)
-	assertSkopeoSucceeds(c, "", "sync", "--scoped", "--src", "yaml", "--dest", "dir", yamlFile, dir1)
-	assertNumberOfManifestsInSubdirs(c, dir1, nTags)
+	require.NoError(t, err)
+	assertSkopeoSucceeds(t, "", "sync", "--scoped", "--src", "yaml", "--dest", "dir", yamlFile, dir1)
+	assertNumberOfManifestsInSubdirs(t, dir1, nTags)
 }
 
-func (s *SyncSuite) TestYamlDigest2Dir(c *check.C) {
-	tmpDir := c.MkDir()
+func (s *syncSuite) TestYamlDigest2Dir() {
+	t := s.T()
+	tmpDir := t.TempDir()
 	dir1 := path.Join(tmpDir, "dir1")
 
 	yamlConfig := `
@@ -332,13 +351,14 @@ k8s.gcr.io:
 `
 	yamlFile := path.Join(tmpDir, "registries.yaml")
 	err := os.WriteFile(yamlFile, []byte(yamlConfig), 0644)
-	c.Assert(err, check.IsNil)
-	assertSkopeoSucceeds(c, "", "sync", "--scoped", "--src", "yaml", "--dest", "dir", yamlFile, dir1)
-	assertNumberOfManifestsInSubdirs(c, dir1, 1)
+	require.NoError(t, err)
+	assertSkopeoSucceeds(t, "", "sync", "--scoped", "--src", "yaml", "--dest", "dir", yamlFile, dir1)
+	assertNumberOfManifestsInSubdirs(t, dir1, 1)
 }
 
-func (s *SyncSuite) TestYaml2Dir(c *check.C) {
-	tmpDir := c.MkDir()
+func (s *syncSuite) TestYaml2Dir() {
+	t := s.T()
+	tmpDir := t.TempDir()
 	dir1 := path.Join(tmpDir, "dir1")
 
 	yamlConfig := `
@@ -366,25 +386,26 @@ quay.io:
 			nTags++
 		}
 	}
-	c.Assert(nTags, check.Not(check.Equals), 0)
+	assert.NotZero(t, nTags)
 
 	yamlFile := path.Join(tmpDir, "registries.yaml")
 	err := os.WriteFile(yamlFile, []byte(yamlConfig), 0644)
-	c.Assert(err, check.IsNil)
-	assertSkopeoSucceeds(c, "", "sync", "--scoped", "--src", "yaml", "--dest", "dir", yamlFile, dir1)
-	assertNumberOfManifestsInSubdirs(c, dir1, nTags)
+	require.NoError(t, err)
+	assertSkopeoSucceeds(t, "", "sync", "--scoped", "--src", "yaml", "--dest", "dir", yamlFile, dir1)
+	assertNumberOfManifestsInSubdirs(t, dir1, nTags)
 }
 
-func (s *SyncSuite) TestYamlTLSVerify(c *check.C) {
+func (s *syncSuite) TestYamlTLSVerify() {
+	t := s.T()
 	const localRegURL = "docker://" + v2DockerRegistryURL + "/"
-	tmpDir := c.MkDir()
+	tmpDir := t.TempDir()
 	dir1 := path.Join(tmpDir, "dir1")
 	image := pullableRepoWithLatestTag
 	tag := "latest"
 
 	// FIXME: It would be nice to use one of the local Docker registries instead of needing an Internet connection.
 	// copy docker => docker
-	assertSkopeoSucceeds(c, "", "copy", "--dest-tls-verify=false", "docker://"+image+":"+tag, localRegURL+image+":"+tag)
+	assertSkopeoSucceeds(t, "", "copy", "--dest-tls-verify=false", "docker://"+image+":"+tag, localRegURL+image+":"+tag)
 
 	yamlTemplate := `
 %s:
@@ -396,7 +417,7 @@ func (s *SyncSuite) TestYamlTLSVerify(c *check.C) {
 	testCfg := []struct {
 		tlsVerify string
 		msg       string
-		checker   func(c *check.C, regexp string, args ...string)
+		checker   func(t *testing.T, regexp string, args ...string)
 	}{
 		{
 			tlsVerify: "tls-verify: false",
@@ -420,17 +441,18 @@ func (s *SyncSuite) TestYamlTLSVerify(c *check.C) {
 		yamlConfig := fmt.Sprintf(yamlTemplate, v2DockerRegistryURL, cfg.tlsVerify, image, tag)
 		yamlFile := path.Join(tmpDir, "registries.yaml")
 		err := os.WriteFile(yamlFile, []byte(yamlConfig), 0644)
-		c.Assert(err, check.IsNil)
+		require.NoError(t, err)
 
-		cfg.checker(c, cfg.msg, "sync", "--scoped", "--src", "yaml", "--dest", "dir", yamlFile, dir1)
+		cfg.checker(t, cfg.msg, "sync", "--scoped", "--src", "yaml", "--dest", "dir", yamlFile, dir1)
 		os.Remove(yamlFile)
 		os.RemoveAll(dir1)
 	}
 
 }
 
-func (s *SyncSuite) TestSyncManifestOutput(c *check.C) {
-	tmpDir := c.MkDir()
+func (s *syncSuite) TestSyncManifestOutput() {
+	t := s.T()
+	tmpDir := t.TempDir()
 
 	destDir1 := filepath.Join(tmpDir, "dest1")
 	destDir2 := filepath.Join(tmpDir, "dest2")
@@ -439,154 +461,162 @@ func (s *SyncSuite) TestSyncManifestOutput(c *check.C) {
 	//Split image:tag path from image URI for manifest comparison
 	imageDir := pullableTaggedImage[strings.LastIndex(pullableTaggedImage, "/")+1:]
 
-	assertSkopeoSucceeds(c, "", "sync", "--format=oci", "--all", "--src", "docker", "--dest", "dir", pullableTaggedImage, destDir1)
-	verifyManifestMIMEType(c, filepath.Join(destDir1, imageDir), imgspecv1.MediaTypeImageManifest)
-	assertSkopeoSucceeds(c, "", "sync", "--format=v2s2", "--all", "--src", "docker", "--dest", "dir", pullableTaggedImage, destDir2)
-	verifyManifestMIMEType(c, filepath.Join(destDir2, imageDir), manifest.DockerV2Schema2MediaType)
-	assertSkopeoSucceeds(c, "", "sync", "--format=v2s1", "--all", "--src", "docker", "--dest", "dir", pullableTaggedImage, destDir3)
-	verifyManifestMIMEType(c, filepath.Join(destDir3, imageDir), manifest.DockerV2Schema1SignedMediaType)
+	assertSkopeoSucceeds(t, "", "sync", "--format=oci", "--all", "--src", "docker", "--dest", "dir", pullableTaggedImage, destDir1)
+	verifyManifestMIMEType(t, filepath.Join(destDir1, imageDir), imgspecv1.MediaTypeImageManifest)
+	assertSkopeoSucceeds(t, "", "sync", "--format=v2s2", "--all", "--src", "docker", "--dest", "dir", pullableTaggedImage, destDir2)
+	verifyManifestMIMEType(t, filepath.Join(destDir2, imageDir), manifest.DockerV2Schema2MediaType)
+	assertSkopeoSucceeds(t, "", "sync", "--format=v2s1", "--all", "--src", "docker", "--dest", "dir", pullableTaggedImage, destDir3)
+	verifyManifestMIMEType(t, filepath.Join(destDir3, imageDir), manifest.DockerV2Schema1SignedMediaType)
 }
 
-func (s *SyncSuite) TestDocker2DockerTagged(c *check.C) {
+func (s *syncSuite) TestDocker2DockerTagged() {
+	t := s.T()
 	const localRegURL = "docker://" + v2DockerRegistryURL + "/"
 
-	tmpDir := c.MkDir()
+	tmpDir := t.TempDir()
 
 	// FIXME: It would be nice to use one of the local Docker registries instead of needing an Internet connection.
 	image := pullableTaggedImage
 	imageRef, err := docker.ParseReference(fmt.Sprintf("//%s", image))
-	c.Assert(err, check.IsNil)
+	require.NoError(t, err)
 	imagePath := imageRef.DockerReference().String()
 
 	dir1 := path.Join(tmpDir, "dir1")
 	dir2 := path.Join(tmpDir, "dir2")
 
 	// sync docker => docker
-	assertSkopeoSucceeds(c, "", "sync", "--scoped", "--dest-tls-verify=false", "--src", "docker", "--dest", "docker", image, v2DockerRegistryURL)
+	assertSkopeoSucceeds(t, "", "sync", "--scoped", "--dest-tls-verify=false", "--src", "docker", "--dest", "docker", image, v2DockerRegistryURL)
 
 	// copy docker => dir
-	assertSkopeoSucceeds(c, "", "copy", "docker://"+image, "dir:"+dir1)
+	assertSkopeoSucceeds(t, "", "copy", "docker://"+image, "dir:"+dir1)
 	_, err = os.Stat(path.Join(dir1, "manifest.json"))
-	c.Assert(err, check.IsNil)
+	require.NoError(t, err)
 
 	// copy docker => dir
-	assertSkopeoSucceeds(c, "", "copy", "--src-tls-verify=false", localRegURL+imagePath, "dir:"+dir2)
+	assertSkopeoSucceeds(t, "", "copy", "--src-tls-verify=false", localRegURL+imagePath, "dir:"+dir2)
 	_, err = os.Stat(path.Join(dir2, "manifest.json"))
-	c.Assert(err, check.IsNil)
+	require.NoError(t, err)
 
-	out := combinedOutputOfCommand(c, "diff", "-urN", dir1, dir2)
-	c.Assert(out, check.Equals, "")
+	out := combinedOutputOfCommand(t, "diff", "-urN", dir1, dir2)
+	assert.Equal(t, "", out)
 }
 
-func (s *SyncSuite) TestDir2DockerTagged(c *check.C) {
+func (s *syncSuite) TestDir2DockerTagged() {
+	t := s.T()
 	const localRegURL = "docker://" + v2DockerRegistryURL + "/"
 
-	tmpDir := c.MkDir()
+	tmpDir := t.TempDir()
 
 	// FIXME: It would be nice to use one of the local Docker registries instead of needing an Internet connection.
 	image := pullableRepoWithLatestTag
 
 	dir1 := path.Join(tmpDir, "dir1")
 	err := os.Mkdir(dir1, 0755)
-	c.Assert(err, check.IsNil)
+	require.NoError(t, err)
 	dir2 := path.Join(tmpDir, "dir2")
 	err = os.Mkdir(dir2, 0755)
-	c.Assert(err, check.IsNil)
+	require.NoError(t, err)
 
 	// create leading dirs
 	err = os.MkdirAll(path.Dir(path.Join(dir1, image)), 0755)
-	c.Assert(err, check.IsNil)
+	require.NoError(t, err)
 
 	// copy docker => dir
-	assertSkopeoSucceeds(c, "", "copy", "docker://"+image, "dir:"+path.Join(dir1, image))
+	assertSkopeoSucceeds(t, "", "copy", "docker://"+image, "dir:"+path.Join(dir1, image))
 	_, err = os.Stat(path.Join(dir1, image, "manifest.json"))
-	c.Assert(err, check.IsNil)
+	require.NoError(t, err)
 
 	// sync dir => docker
-	assertSkopeoSucceeds(c, "", "sync", "--scoped", "--dest-tls-verify=false", "--src", "dir", "--dest", "docker", dir1, v2DockerRegistryURL)
+	assertSkopeoSucceeds(t, "", "sync", "--scoped", "--dest-tls-verify=false", "--src", "dir", "--dest", "docker", dir1, v2DockerRegistryURL)
 
 	// create leading dirs
 	err = os.MkdirAll(path.Dir(path.Join(dir2, image)), 0755)
-	c.Assert(err, check.IsNil)
+	require.NoError(t, err)
 
 	// copy docker => dir
-	assertSkopeoSucceeds(c, "", "copy", "--src-tls-verify=false", localRegURL+image, "dir:"+path.Join(dir2, image))
+	assertSkopeoSucceeds(t, "", "copy", "--src-tls-verify=false", localRegURL+image, "dir:"+path.Join(dir2, image))
 	_, err = os.Stat(path.Join(dir2, image, "manifest.json"))
-	c.Assert(err, check.IsNil)
+	require.NoError(t, err)
 
-	out := combinedOutputOfCommand(c, "diff", "-urN", dir1, dir2)
-	c.Assert(out, check.Equals, "")
+	out := combinedOutputOfCommand(t, "diff", "-urN", dir1, dir2)
+	assert.Equal(t, "", out)
 }
 
-func (s *SyncSuite) TestFailsWithDir2Dir(c *check.C) {
-	tmpDir := c.MkDir()
+func (s *syncSuite) TestFailsWithDir2Dir() {
+	t := s.T()
+	tmpDir := t.TempDir()
 
 	dir1 := path.Join(tmpDir, "dir1")
 	dir2 := path.Join(tmpDir, "dir2")
 
 	// sync dir => dir is not allowed
-	assertSkopeoFails(c, ".*sync from 'dir' to 'dir' not implemented.*", "sync", "--scoped", "--src", "dir", "--dest", "dir", dir1, dir2)
+	assertSkopeoFails(t, ".*sync from 'dir' to 'dir' not implemented.*", "sync", "--scoped", "--src", "dir", "--dest", "dir", dir1, dir2)
 }
 
-func (s *SyncSuite) TestFailsNoSourceImages(c *check.C) {
-	tmpDir := c.MkDir()
+func (s *syncSuite) TestFailsNoSourceImages() {
+	t := s.T()
+	tmpDir := t.TempDir()
 
-	assertSkopeoFails(c, ".*No images to sync found in .*",
+	assertSkopeoFails(t, ".*No images to sync found in .*",
 		"sync", "--scoped", "--dest-tls-verify=false", "--src", "dir", "--dest", "docker", tmpDir, v2DockerRegistryURL)
 
-	assertSkopeoFails(c, ".*No images to sync found in .*",
+	assertSkopeoFails(t, ".*Error determining repository tags for repo docker.io/library/hopefully_no_images_will_ever_be_called_like_this: fetching tags list: requested access to the resource is denied.*",
 		"sync", "--scoped", "--dest-tls-verify=false", "--src", "docker", "--dest", "docker", "hopefully_no_images_will_ever_be_called_like_this", v2DockerRegistryURL)
 }
 
-func (s *SyncSuite) TestFailsWithDockerSourceNoRegistry(c *check.C) {
+func (s *syncSuite) TestFailsWithDockerSourceNoRegistry() {
+	t := s.T()
 	const regURL = "google.com/namespace/imagename"
 
-	tmpDir := c.MkDir()
+	tmpDir := t.TempDir()
 
 	//untagged
-	assertSkopeoFails(c, ".*invalid status code from registry 404.*",
+	assertSkopeoFails(t, ".*StatusCode: 404.*",
 		"sync", "--scoped", "--src", "docker", "--dest", "dir", regURL, tmpDir)
 
 	//tagged
-	assertSkopeoFails(c, ".*invalid status code from registry 404.*",
+	assertSkopeoFails(t, ".*StatusCode: 404.*",
 		"sync", "--scoped", "--src", "docker", "--dest", "dir", regURL+":thetag", tmpDir)
 }
 
-func (s *SyncSuite) TestFailsWithDockerSourceUnauthorized(c *check.C) {
+func (s *syncSuite) TestFailsWithDockerSourceUnauthorized() {
+	t := s.T()
 	const repo = "privateimagenamethatshouldnotbepublic"
-	tmpDir := c.MkDir()
+	tmpDir := t.TempDir()
 
 	//untagged
-	assertSkopeoFails(c, ".*Registry disallows tag list retrieval.*",
+	assertSkopeoFails(t, ".*requested access to the resource is denied.*",
 		"sync", "--scoped", "--src", "docker", "--dest", "dir", repo, tmpDir)
 
 	//tagged
-	assertSkopeoFails(c, ".*unauthorized: authentication required.*",
+	assertSkopeoFails(t, ".*requested access to the resource is denied.*",
 		"sync", "--scoped", "--src", "docker", "--dest", "dir", repo+":thetag", tmpDir)
 }
 
-func (s *SyncSuite) TestFailsWithDockerSourceNotExisting(c *check.C) {
+func (s *syncSuite) TestFailsWithDockerSourceNotExisting() {
+	t := s.T()
 	repo := path.Join(v2DockerRegistryURL, "imagedoesnotexist")
-	tmpDir := c.MkDir()
+	tmpDir := t.TempDir()
 
 	//untagged
-	assertSkopeoFails(c, ".*invalid status code from registry 404.*",
+	assertSkopeoFails(t, ".*repository name not known to registry.*",
 		"sync", "--scoped", "--src-tls-verify=false", "--src", "docker", "--dest", "dir", repo, tmpDir)
 
 	//tagged
-	assertSkopeoFails(c, ".*reading manifest.*",
+	assertSkopeoFails(t, ".*reading manifest.*",
 		"sync", "--scoped", "--src-tls-verify=false", "--src", "docker", "--dest", "dir", repo+":thetag", tmpDir)
 }
 
-func (s *SyncSuite) TestFailsWithDirSourceNotExisting(c *check.C) {
+func (s *syncSuite) TestFailsWithDirSourceNotExisting() {
+	t := s.T()
 	// Make sure the dir does not exist!
-	tmpDir := c.MkDir()
+	tmpDir := t.TempDir()
 	tmpDir = filepath.Join(tmpDir, "this-does-not-exist")
 	err := os.RemoveAll(tmpDir)
-	c.Assert(err, check.IsNil)
+	require.NoError(t, err)
 	_, err = os.Stat(path.Join(tmpDir))
-	c.Check(os.IsNotExist(err), check.Equals, true)
+	assert.True(t, os.IsNotExist(err))
 
-	assertSkopeoFails(c, ".*no such file or directory.*",
+	assertSkopeoFails(t, ".*no such file or directory.*",
 		"sync", "--scoped", "--dest-tls-verify=false", "--src", "dir", "--dest", "docker", tmpDir, v2DockerRegistryURL)
 }

integration/utils.go

@@ -4,14 +4,17 @@ import (
 	"bytes"
 	"io"
 	"net"
+	"net/netip"
 	"os"
 	"os/exec"
 	"path/filepath"
 	"strings"
+	"testing"
 	"time"
 
 	"github.com/containers/image/v5/manifest"
-	"gopkg.in/check.v1"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
 )
 
 const skopeoBinary = "skopeo"
@@ -19,21 +22,21 @@ const decompressDirsBinary = "./decompress-dirs.sh"
 
 const testFQIN = "docker://quay.io/libpod/busybox" // tag left off on purpose, some tests need to add a special one
 const testFQIN64 = "docker://quay.io/libpod/busybox:amd64"
-const testFQINMultiLayer = "docker://quay.io/libpod/alpine_nginx:master" // multi-layer
+const testFQINMultiLayer = "docker://quay.io/libpod/alpine_nginx:latest" // multi-layer
 
-// consumeAndLogOutputStream takes (f, err) from an exec.*Pipe(), and causes all output to it to be logged to c.
-func consumeAndLogOutputStream(c *check.C, id string, f io.ReadCloser, err error) {
-	c.Assert(err, check.IsNil)
+// consumeAndLogOutputStream takes (f, err) from an exec.*Pipe(), and causes all output to it to be logged to t.
+func consumeAndLogOutputStream(t *testing.T, id string, f io.ReadCloser, err error) {
+	require.NoError(t, err)
 	go func() {
 		defer func() {
 			f.Close()
-			c.Logf("Output %s: Closed", id)
+			t.Logf("Output %s: Closed", id)
 		}()
 		buf := make([]byte, 1024)
 		for {
-			c.Logf("Output %s: waiting", id)
+			t.Logf("Output %s: waiting", id)
 			n, err := f.Read(buf)
-			c.Logf("Output %s: got %d,%#v: %s", id, n, err, strings.TrimSuffix(string(buf[:n]), "\n"))
+			t.Logf("Output %s: got %d,%#v: %s", id, n, err, strings.TrimSuffix(string(buf[:n]), "\n"))
 			if n <= 0 {
 				break
 			}
@@ -41,72 +44,73 @@ func consumeAndLogOutputStream(c *check.C, id string, f io.ReadCloser, err error
 	}()
 }
 
-// consumeAndLogOutputs causes all output to stdout and stderr from an *exec.Cmd to be logged to c
-func consumeAndLogOutputs(c *check.C, id string, cmd *exec.Cmd) {
+// consumeAndLogOutputs causes all output to stdout and stderr from an *exec.Cmd to be logged to c.
+func consumeAndLogOutputs(t *testing.T, id string, cmd *exec.Cmd) {
 	stdout, err := cmd.StdoutPipe()
-	consumeAndLogOutputStream(c, id+" stdout", stdout, err)
+	consumeAndLogOutputStream(t, id+" stdout", stdout, err)
 	stderr, err := cmd.StderrPipe()
-	consumeAndLogOutputStream(c, id+" stderr", stderr, err)
+	consumeAndLogOutputStream(t, id+" stderr", stderr, err)
 }
 
 // combinedOutputOfCommand runs a command as if exec.Command().CombinedOutput(), verifies that the exit status is 0, and returns the output,
 // or terminates c on failure.
-func combinedOutputOfCommand(c *check.C, name string, args ...string) string {
-	c.Logf("Running %s %s", name, strings.Join(args, " "))
+func combinedOutputOfCommand(t *testing.T, name string, args ...string) string {
+	t.Logf("Running %s %s", name, strings.Join(args, " "))
 	out, err := exec.Command(name, args...).CombinedOutput()
-	c.Assert(err, check.IsNil, check.Commentf("%s", out))
+	require.NoError(t, err, "%s", out)
 	return string(out)
 }
 
 // assertSkopeoSucceeds runs a skopeo command as if exec.Command().CombinedOutput, verifies that the exit status is 0,
 // and optionally that the output matches a multi-line regexp if it is nonempty;
 // or terminates c on failure
-func assertSkopeoSucceeds(c *check.C, regexp string, args ...string) {
-	c.Logf("Running %s %s", skopeoBinary, strings.Join(args, " "))
+func assertSkopeoSucceeds(t *testing.T, regexp string, args ...string) {
+	t.Logf("Running %s %s", skopeoBinary, strings.Join(args, " "))
 	out, err := exec.Command(skopeoBinary, args...).CombinedOutput()
-	c.Assert(err, check.IsNil, check.Commentf("%s", out))
+	assert.NoError(t, err, "%s", out)
 	if regexp != "" {
-		c.Assert(string(out), check.Matches, "(?s)"+regexp) // (?s) : '.' will also match newlines
+		assert.Regexp(t, "(?s)"+regexp, string(out)) // (?s) : '.' will also match newlines
 	}
 }
 
 // assertSkopeoFails runs a skopeo command as if exec.Command().CombinedOutput, verifies that the exit status is 0,
 // and that the output matches a multi-line regexp;
 // or terminates c on failure
-func assertSkopeoFails(c *check.C, regexp string, args ...string) {
-	c.Logf("Running %s %s", skopeoBinary, strings.Join(args, " "))
+func assertSkopeoFails(t *testing.T, regexp string, args ...string) {
+	t.Logf("Running %s %s", skopeoBinary, strings.Join(args, " "))
 	out, err := exec.Command(skopeoBinary, args...).CombinedOutput()
-	c.Assert(err, check.NotNil, check.Commentf("%s", out))
-	c.Assert(string(out), check.Matches, "(?s)"+regexp) // (?s) : '.' will also match newlines
+	assert.Error(t, err, "%s", out)
+	assert.Regexp(t, "(?s)"+regexp, string(out)) // (?s) : '.' will also match newlines
 }
 
 // runCommandWithInput runs a command as if exec.Command(), sending it the input to stdin,
 // and verifies that the exit status is 0, or terminates c on failure.
-func runCommandWithInput(c *check.C, input string, name string, args ...string) {
+func runCommandWithInput(t *testing.T, input string, name string, args ...string) {
 	cmd := exec.Command(name, args...)
-	runExecCmdWithInput(c, cmd, input)
+	runExecCmdWithInput(t, cmd, input)
 }
 
 // runExecCmdWithInput runs an exec.Cmd, sending it the input to stdin,
 // and verifies that the exit status is 0, or terminates c on failure.
-func runExecCmdWithInput(c *check.C, cmd *exec.Cmd, input string) {
-	c.Logf("Running %s %s", cmd.Path, strings.Join(cmd.Args, " "))
-	consumeAndLogOutputs(c, cmd.Path+" "+strings.Join(cmd.Args, " "), cmd)
+func runExecCmdWithInput(t *testing.T, cmd *exec.Cmd, input string) {
+	t.Logf("Running %s %s", cmd.Path, strings.Join(cmd.Args, " "))
+	consumeAndLogOutputs(t, cmd.Path+" "+strings.Join(cmd.Args, " "), cmd)
 	stdin, err := cmd.StdinPipe()
-	c.Assert(err, check.IsNil)
+	require.NoError(t, err)
 	err = cmd.Start()
-	c.Assert(err, check.IsNil)
-	_, err = stdin.Write([]byte(input))
-	c.Assert(err, check.IsNil)
+	require.NoError(t, err)
+	_, err = io.WriteString(stdin, input)
+	require.NoError(t, err)
 	err = stdin.Close()
-	c.Assert(err, check.IsNil)
+	require.NoError(t, err)
 	err = cmd.Wait()
-	c.Assert(err, check.IsNil)
+	assert.NoError(t, err)
 }
 
 // isPortOpen returns true iff the specified port on localhost is open.
-func isPortOpen(port int) bool {
-	conn, err := net.DialTCP("tcp", nil, &net.TCPAddr{IP: net.IPv4(127, 0, 0, 1), Port: port})
+func isPortOpen(port uint16) bool {
+	ap := netip.AddrPortFrom(netip.AddrFrom4([4]byte{127, 0, 0, 1}), port)
+	conn, err := net.DialTCP("tcp", nil, net.TCPAddrFromAddrPort(ap))
 	if err != nil {
 		return false
 	}
@@ -118,29 +122,29 @@ func isPortOpen(port int) bool {
 // The checking can be aborted by sending a value to the terminate channel, which the caller should
 // always do using
 // defer func() {terminate <- true}()
-func newPortChecker(c *check.C, port int) (portOpen <-chan bool, terminate chan<- bool) {
+func newPortChecker(t *testing.T, port uint16) (portOpen <-chan bool, terminate chan<- bool) {
 	portOpenBidi := make(chan bool)
 	// Buffered, so that sending a terminate request after the goroutine has exited does not block.
 	terminateBidi := make(chan bool, 1)
 
 	go func() {
 		defer func() {
-			c.Logf("Port checker for port %d exiting", port)
+			t.Logf("Port checker for port %d exiting", port)
 		}()
 		for {
-			c.Logf("Checking for port %d...", port)
+			t.Logf("Checking for port %d...", port)
 			if isPortOpen(port) {
-				c.Logf("Port %d open", port)
+				t.Logf("Port %d open", port)
 				portOpenBidi <- true
 				return
 			}
-			c.Logf("Sleeping for port %d", port)
+			t.Logf("Sleeping for port %d", port)
 			sleepChan := time.After(100 * time.Millisecond)
 			select {
 			case <-sleepChan: // Try again
-				c.Logf("Sleeping for port %d done, will retry", port)
+				t.Logf("Sleeping for port %d done, will retry", port)
 			case <-terminateBidi:
-				c.Logf("Check for port %d terminated", port)
+				t.Logf("Check for port %d terminated", port)
 				return
 			}
 		}
@@ -162,54 +166,51 @@ func modifyEnviron(env []string, name, value string) []string {
 
 // fileFromFixtureFixture applies edits to inputPath and returns a path to the temporary file.
 // Callers should defer os.Remove(the_returned_path)
-func fileFromFixture(c *check.C, inputPath string, edits map[string]string) string {
+func fileFromFixture(t *testing.T, inputPath string, edits map[string]string) string {
 	contents, err := os.ReadFile(inputPath)
-	c.Assert(err, check.IsNil)
+	require.NoError(t, err)
 	for template, value := range edits {
 		updated := bytes.ReplaceAll(contents, []byte(template), []byte(value))
-		c.Assert(bytes.Equal(updated, contents), check.Equals, false, check.Commentf("Replacing %s in %#v failed", template, string(contents))) // Verify that the template has matched something and we are not silently ignoring it.
+		require.NotEqual(t, contents, updated, "Replacing %s in %#v failed", template, string(contents)) // Verify that the template has matched something and we are not silently ignoring it.
 		contents = updated
 	}
 
 	file, err := os.CreateTemp("", "policy.json")
-	c.Assert(err, check.IsNil)
+	require.NoError(t, err)
 	path := file.Name()
 
 	_, err = file.Write(contents)
-	c.Assert(err, check.IsNil)
+	require.NoError(t, err)
 	err = file.Close()
-	c.Assert(err, check.IsNil)
+	require.NoError(t, err)
 	return path
 }
 
 // runDecompressDirs runs decompress-dirs.sh using exec.Command().CombinedOutput, verifies that the exit status is 0,
 // and optionally that the output matches a multi-line regexp if it is nonempty; or terminates c on failure
-func runDecompressDirs(c *check.C, regexp string, args ...string) {
-	c.Logf("Running %s %s", decompressDirsBinary, strings.Join(args, " "))
+func runDecompressDirs(t *testing.T, args ...string) {
+	t.Logf("Running %s %s", decompressDirsBinary, strings.Join(args, " "))
 	for i, dir := range args {
 		m, err := os.ReadFile(filepath.Join(dir, "manifest.json"))
-		c.Assert(err, check.IsNil)
-		c.Logf("manifest %d before: %s", i+1, string(m))
+		require.NoError(t, err)
+		t.Logf("manifest %d before: %s", i+1, string(m))
 	}
 	out, err := exec.Command(decompressDirsBinary, args...).CombinedOutput()
-	c.Assert(err, check.IsNil, check.Commentf("%s", out))
+	assert.NoError(t, err, "%s", out)
 	for i, dir := range args {
 		if len(out) > 0 {
-			c.Logf("output: %s", out)
+			t.Logf("output: %s", out)
 		}
 		m, err := os.ReadFile(filepath.Join(dir, "manifest.json"))
-		c.Assert(err, check.IsNil)
-		c.Logf("manifest %d after: %s", i+1, string(m))
-	}
-	if regexp != "" {
-		c.Assert(string(out), check.Matches, "(?s)"+regexp) // (?s) : '.' will also match newlines
+		require.NoError(t, err)
+		t.Logf("manifest %d after: %s", i+1, string(m))
 	}
 }
 
 // Verify manifest in a dir: image at dir is expectedMIMEType.
-func verifyManifestMIMEType(c *check.C, dir string, expectedMIMEType string) {
+func verifyManifestMIMEType(t *testing.T, dir string, expectedMIMEType string) {
 	manifestBlob, err := os.ReadFile(filepath.Join(dir, "manifest.json"))
-	c.Assert(err, check.IsNil)
+	require.NoError(t, err)
 	mimeType := manifest.GuessMIMEType(manifestBlob)
-	c.Assert(mimeType, check.Equals, expectedMIMEType)
+	assert.Equal(t, expectedMIMEType, mimeType)
 }

rpm/skopeo.spec

@@ -0,0 +1,174 @@
+%global with_debug 1
+
+%if 0%{?with_debug}
+%global _find_debuginfo_dwz_opts %{nil}
+%global _dwz_low_mem_die_limit 0
+%else
+%global debug_package %{nil}
+%endif
+
+# RHEL's default %%gobuild macro doesn't account for the BUILDTAGS variable, so we
+# set it separately here and do not depend on RHEL's go-[s]rpm-macros package
+# until that's fixed.
+# c9s bz: https://bugzilla.redhat.com/show_bug.cgi?id=2227328
+# c8s bz: https://bugzilla.redhat.com/show_bug.cgi?id=2227331
+%if %{defined rhel}
+%define gobuild(o:) go build -buildmode pie -compiler gc -tags="rpm_crashtraceback libtrust_openssl ${BUILDTAGS:-}" -ldflags "-linkmode=external -compressdwarf=false ${LDFLAGS:-} -B 0x$(head -c20 /dev/urandom|od -An -tx1|tr -d ' \\n') -extldflags '%__global_ldflags'" -a -v -x %{?**};
+%endif
+
+%global gomodulesmode GO111MODULE=on
+
+# No btrfs on RHEL
+%if %{defined fedora}
+%define build_with_btrfs 1
+%endif
+
+# Only used in official koji builds
+# Copr builds set a separate epoch for all environments
+%if %{defined fedora}
+%define conditional_epoch 1
+%else
+%define conditional_epoch 2
+%endif
+
+Name: skopeo
+%if %{defined copr_username}
+Epoch: 102
+%else
+Epoch: %{conditional_epoch}
+%endif
+# DO NOT TOUCH the Version string!
+# The TRUE source of this specfile is:
+# https://github.com/containers/skopeo/blob/main/rpm/skopeo.spec
+# If that's what you're reading, Version must be 0, and will be updated by Packit for
+# copr and koji builds.
+# If you're reading this on dist-git, the version is automatically filled in by Packit.
+Version: 0
+# The `AND` needs to be uppercase in the License for SPDX compatibility
+License: Apache-2.0 AND BSD-2-Clause AND BSD-3-Clause AND ISC AND MIT AND MPL-2.0
+Release: %autorelease
+%if %{defined golang_arches_future}
+ExclusiveArch: %{golang_arches_future}
+%else
+ExclusiveArch: aarch64 ppc64le s390x x86_64
+%endif
+Summary: Inspect container images and repositories on registries
+URL: https://github.com/containers/%{name}
+# Tarball fetched from upstream
+Source0: %{url}/archive/v%{version}.tar.gz
+BuildRequires: %{_bindir}/go-md2man
+%if %{defined build_with_btrfs}
+BuildRequires: btrfs-progs-devel
+%endif
+BuildRequires: git-core
+BuildRequires: golang
+%if !%{defined gobuild}
+BuildRequires: go-rpm-macros
+%endif
+BuildRequires: gpgme-devel
+BuildRequires: libassuan-devel
+BuildRequires: pkgconfig(devmapper)
+BuildRequires: ostree-devel
+BuildRequires: glib2-devel
+BuildRequires: make
+BuildRequires: shadow-utils-subid-devel
+Requires: containers-common >= 4:1-21
+
+%description
+Command line utility to inspect images and repositories directly on Docker
+registries without the need to pull them
+
+%package tests
+Summary: Tests for %{name}
+
+Requires: %{name} = %{epoch}:%{version}-%{release}
+Requires: bats
+Requires: gnupg
+Requires: jq
+Requires: golang
+Requires: podman
+Requires: crun
+Requires: httpd-tools
+Requires: openssl
+Requires: fakeroot
+Requires: squashfs-tools
+
+%description tests
+%{summary}
+
+This package contains system tests for %{name}
+
+%prep
+%autosetup -Sgit %{name}-%{version}
+# The %%install stage should not rebuild anything but only install what's
+# built in the %%build stage. So, remove any dependency on build targets.
+sed -i 's/^install-binary: bin\/%{name}.*/install-binary:/' Makefile
+sed -i 's/^completions: bin\/%{name}.*/completions:/' Makefile
+sed -i 's/^install-docs: docs.*/install-docs:/' Makefile
+
+%build
+%set_build_flags
+export CGO_CFLAGS=$CFLAGS
+
+# These extra flags present in $CFLAGS have been skipped for now as they break the build
+CGO_CFLAGS=$(echo $CGO_CFLAGS | sed 's/-flto=auto//g')
+CGO_CFLAGS=$(echo $CGO_CFLAGS | sed 's/-Wp,D_GLIBCXX_ASSERTIONS//g')
+CGO_CFLAGS=$(echo $CGO_CFLAGS | sed 's/-specs=\/usr\/lib\/rpm\/redhat\/redhat-annobin-cc1//g')
+
+%ifarch x86_64
+export CGO_CFLAGS="$CGO_CFLAGS -m64 -mtune=generic -fcf-protection=full"
+%endif
+
+BASEBUILDTAGS="$(hack/libdm_tag.sh) $(hack/libsubid_tag.sh)"
+%if %{defined build_with_btrfs}
+export BUILDTAGS="$BASEBUILDTAGS $(hack/btrfs_tag.sh) $(hack/btrfs_installed_tag.sh)"
+%else
+export BUILDTAGS="$BASEBUILDTAGS btrfs_noversion exclude_graphdriver_btrfs"
+%endif
+
+# unset LDFLAGS earlier set from set_build_flags
+LDFLAGS=''
+
+%gobuild -o bin/%{name} ./cmd/%{name}
+%{__make} docs
+
+%install
+make \
+    DESTDIR=%{buildroot} \
+    PREFIX=%{_prefix} \
+    install-binary install-docs install-completions
+
+# system tests
+install -d -p %{buildroot}/%{_datadir}/%{name}/test/system
+cp -pav systemtest/* %{buildroot}/%{_datadir}/%{name}/test/system/
+
+#define license tag if not already defined
+%{!?_licensedir:%global license %doc}
+
+%files
+%license LICENSE
+%doc README.md
+%{_bindir}/%{name}
+%{_mandir}/man1/%{name}*
+%dir %{_datadir}/bash-completion
+%dir %{_datadir}/bash-completion/completions
+%{_datadir}/bash-completion/completions/%{name}
+%dir %{_datadir}/fish/vendor_completions.d
+%{_datadir}/fish/vendor_completions.d/%{name}.fish
+%dir %{_datadir}/zsh/site-functions
+%{_datadir}/zsh/site-functions/_%{name}
+
+%files tests
+%license LICENSE
+%{_datadir}/%{name}/test
+
+%changelog
+%if %{defined autochangelog}
+%autochangelog
+%else
+# NOTE: This changelog will be visible on CentOS 8 Stream builds
+# Other envs are capable of handling autochangelog
+* Tue Jun 13 2023 RH Container Bot <rhcontainerbot@fedoraproject.org>
+- Placeholder changelog for envs that are not autochangelog-ready.
+- Contact upstream if you need to report an issue with the build.
+%endif

skopeo.spec.rpkg

@@ -1,132 +0,0 @@
-# For automatic rebuilds in COPR
-
-# The following tag is to get correct syntax highlighting for this file in vim text editor
-# vim: syntax=spec
-
-# Any additinoal comments should go below this line or else syntax highlighting
-# may not work.
-
-# CAUTION: This is not a replacement for RPMs provided by your distro.
-# Only intended to build and test the latest unreleased changes.
-
-%global gomodulesmode GO111MODULE=on
-%global with_debug 1
-
-%if 0%{?with_debug}
-%global _find_debuginfo_dwz_opts %{nil}
-%global _dwz_low_mem_die_limit 0
-%else
-%global debug_package %{nil}
-%endif
-
-%if ! 0%{?gobuild:1}
-%define gobuild(o:) go build -buildmode pie -compiler gc -tags="rpm_crashtraceback ${BUILDTAGS:-}" -ldflags "${LDFLAGS:-} -B 0x$(head -c20 /dev/urandom|od -An -tx1|tr -d ' \\n') -extldflags '-Wl,-z,relro -Wl,-z,now -specs=/usr/lib/rpm/redhat/redhat-hardened-ld '" -a -v -x %{?**};
-%endif
-
-Name: {{{ git_dir_name }}}
-Epoch: 101
-Version: {{{ git_dir_version }}}
-Release: 1%{?dist}
-Summary: Inspect container images and repositories on registries
-License: ASL 2.0
-URL: https://github.com/containers/skopeo
-VCS: {{{ git_dir_vcs }}}
-Source: {{{ git_dir_pack }}}
-%if 0%{?fedora} && ! 0%{?rhel}
-BuildRequires: btrfs-progs-devel
-%endif
-BuildRequires: golang >= 1.16.6
-BuildRequires: glib2-devel
-BuildRequires: git-core
-BuildRequires: go-md2man
-%if 0%{?fedora} || 0%{?rhel} >= 9
-BuildRequires: go-rpm-macros
-%endif
-BuildRequires: pkgconfig(devmapper)
-BuildRequires: gpgme-devel
-BuildRequires: libassuan-devel
-BuildRequires: pkgconfig
-BuildRequires: make
-BuildRequires: ostree-devel
-%if 0%{?fedora} <= 35
-Requires: containers-common >= 4:1-39
-%else
-Requires: containers-common >= 4:1-46
-%endif
-
-%description
-Command line utility to inspect images and repositories directly on Docker
-registries without the need to pull them.
-
-%package tests
-Summary: Tests for %{name}
-Requires: %{name} = %{epoch}:%{version}-%{release}
-Requires: bats
-Requires: gnupg
-Requires: jq
-Requires: podman
-Requires: httpd-tools
-Requires: openssl
-Requires: fakeroot
-Requires: squashfs-tools
-
-%description tests
-%{summary}
-
-This package contains system tests for %{name}
-
-%prep
-{{{ git_dir_setup_macro }}}
-
-sed -i 's/install-binary: bin\/skopeo/install-binary:/' Makefile
-
-# This will invoke `make` command in the directory with the extracted sources.
-%build
-%set_build_flags
-export CGO_CFLAGS=$CFLAGS
-# These extra flags present in $CFLAGS have been skipped for now as they break the build
-CGO_CFLAGS=$(echo $CGO_CFLAGS | sed 's/-flto=auto//g')
-CGO_CFLAGS=$(echo $CGO_CFLAGS | sed 's/-Wp,D_GLIBCXX_ASSERTIONS//g')
-CGO_CFLAGS=$(echo $CGO_CFLAGS | sed 's/-specs=\/usr\/lib\/rpm\/redhat\/redhat-annobin-cc1//g')
-
-%ifarch x86_64
-export CGO_CFLAGS+=" -m64 -mtune=generic -fcf-protection=full"
-%endif
-
-LDFLAGS=""
-
-export BUILDTAGS="$(hack/libdm_tag.sh)"
-%if 0%{?rhel}
-export BUILDTAGS="$BUILDTAGS exclude_graphdriver_btrfs btrfs_noversion"
-%endif
-
-%gobuild -o bin/%{name} ./cmd/%{name}
-
-%install
-%{__make} PREFIX=%{buildroot}%{_prefix} install-binary install-docs install-completions
-
-# system tests
-install -d -p %{buildroot}/%{_datadir}/%{name}/test/system
-cp -pav systemtest/* %{buildroot}/%{_datadir}/%{name}/test/system/
-
-%files
-%license LICENSE
-%doc README.md
-%{_bindir}/%{name}
-%{_mandir}/man1/%%{name}*
-%dir %{_datadir}/bash-completion
-%dir %{_datadir}/bash-completion/completions
-%{_datadir}/bash-completion/completions/%{name}
-%dir %{_datadir}/fish
-%dir %{_datadir}/fish/vendor_completions.d
-%{_datadir}/fish/vendor_completions.d/%{name}.fish
-%dir %{_datadir}/zsh
-%dir %{_datadir}/zsh/site-functions
-%{_datadir}/zsh/site-functions/_%{name}
-
-%files tests
-%license LICENSE
-%{_datadir}/%{name}/test
-
-%changelog
-{{{ git_dir_changelog }}}

systemtest/001-basic.bats

@@ -16,29 +16,4 @@ function setup() {
     expect_output --substring "skopeo version [0-9.]+"
 }
 
-@test "skopeo release isn't a development version" {
-    [[ "${RELEASE_TESTING:-false}" == "true" ]] || \
-      skip "Release testing may be enabled by setting \$RELEASE_TESTING = 'true'."
-
-    run_skopeo --version
-
-    # expect_output() doesn't support negative matching
-    if [[ "$output" =~ "dev" ]]; then
-        # This is a multi-line message, which may in turn contain multi-line
-        # output, so let's format it ourselves, readably
-        local -a output_split
-        readarray -t output_split <<<"$output"
-        printf "#/vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv\n"  >&2
-        printf "#|       FAIL: $BATS_TEST_NAME\n"                   >&2
-        printf "#| unexpected: 'dev'\n"                             >&2
-        printf "#|     actual: '%s'\n" "${output_split[0]}"         >&2
-        local line
-        for line in "${output_split[@]:1}"; do
-            printf "#|           > '%s'\n" "$line"                  >&2
-        done
-        printf "#\\^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n" >&2
-        false
-    fi
-}
-
 # vim: filetype=sh

systemtest/010-inspect.bats

@@ -95,10 +95,11 @@ END_EXPECT
     # is created by the make-noarch-manifest script in this directory.
     img=docker://quay.io/libpod/notmyarch:20210121
 
-    # Get our host arch (what we're running on). This assumes that skopeo
-    # arch matches podman; it also assumes running podman >= April 2020
-    # (prior to that, the format keys were lower-case).
-    arch=$(podman info --format '{{.Host.Arch}}')
+    # Get our host golang arch (what we're running on, according to golang).
+    # This assumes that skopeo arch matches host arch (which it always should).
+    # Buildah is used here because it depends less on the exact system config
+    # than podman - and all we're really after is the golang-flavored arch name.
+    arch=$(go env GOARCH)
 
     # By default, 'inspect' tries to match our host os+arch. This should fail.
     run_skopeo 1 inspect $img

systemtest/020-copy.bats

@@ -50,7 +50,7 @@ function setup() {
 
     local dir=$TESTDIR/dir
 
-    run_skopeo copy --dest-compress --dest-compress-format=zstd $remote_image oci:$dir:latest
+    run_skopeo copy --dest-compress-format=zstd $remote_image oci:$dir:latest
 
     # zstd magic number
     local magic=$(printf "\x28\xb5\x2f\xfd")

systemtest/040-local-registry-auth.bats

@@ -8,38 +8,41 @@ load helpers
 function setup() {
     standard_setup
 
-    # Remove old/stale cred file
-    _cred_dir=$TESTDIR/credentials
-    export XDG_RUNTIME_DIR=$_cred_dir
-    mkdir -p $_cred_dir/containers
-    rm -f $_cred_dir/containers/auth.json
-
     # Start authenticated registry with random password
     testuser=testuser
     testpassword=$(random_string 15)
 
     start_registry --testuser=$testuser --testpassword=$testpassword --enable-delete=true reg
+
+    _cred_dir=$TESTDIR/credentials
+    # It is important to change XDG_RUNTIME_DIR only after we start the registry, otherwise it affects the path of $XDG_RUNTIME_DIR/netns maintained by Podman,
+    # making it impossible to clean up after ourselves.
+    export XDG_RUNTIME_DIR_OLD=$XDG_RUNTIME_DIR
+    export XDG_RUNTIME_DIR=$_cred_dir
+    mkdir -p $_cred_dir/containers
+    # Remove old/stale cred file
+    rm -f $_cred_dir/containers/auth.json
 }
 
 @test "auth: credentials on command line" {
     # No creds
     run_skopeo 1 inspect --tls-verify=false docker://localhost:5000/nonesuch
-    expect_output --substring "unauthorized: authentication required"
+    expect_output --substring "authentication required"
 
     # Wrong user
     run_skopeo 1 inspect --tls-verify=false --creds=baduser:badpassword \
                docker://localhost:5000/nonesuch
-    expect_output --substring "unauthorized: authentication required"
+    expect_output --substring "authentication required"
 
     # Wrong password
     run_skopeo 1 inspect --tls-verify=false --creds=$testuser:badpassword \
                docker://localhost:5000/nonesuch
-    expect_output --substring "unauthorized: authentication required"
+    expect_output --substring "authentication required"
 
     # Correct creds, but no such image
     run_skopeo 1 inspect --tls-verify=false --creds=$testuser:$testpassword \
                docker://localhost:5000/nonesuch
-    expect_output --substring "manifest unknown: manifest unknown"
+    expect_output --substring "manifest unknown"
 
     # These should pass
     run_skopeo copy --dest-tls-verify=false --dcreds=$testuser:$testpassword \
@@ -64,7 +67,7 @@ function setup() {
     podman logout localhost:5000
 
     run_skopeo 1 inspect --tls-verify=false docker://localhost:5000/busybox:mine
-    expect_output --substring "unauthorized: authentication required"
+    expect_output --substring "authentication required"
 }
 
 @test "auth: copy with --src-creds and --dest-creds" {
@@ -94,7 +97,7 @@ function setup() {
 
     # inspect without authfile: should fail
     run_skopeo 1 inspect --tls-verify=false docker://localhost:5000/busybox:mine
-    expect_output --substring "unauthorized: authentication required"
+    expect_output --substring "authentication required"
 
     # inspect with authfile: should work
     run_skopeo inspect --tls-verify=false --authfile $TESTDIR/test.auth docker://localhost:5000/busybox:mine
@@ -109,6 +112,9 @@ function setup() {
 }
 
 teardown() {
+    # Need to restore XDG_RUNTIME_DIR.
+    XDG_RUNTIME_DIR=$XDG_RUNTIME_DIR_OLD
+
     podman rm -f reg
 
     if [[ -n $_cred_dir ]]; then

systemtest/050-signing.bats

@@ -242,7 +242,7 @@ END_TESTS
                $fingerprint \
                $TESTDIR/busybox.signature
     # manifest digest
-    digest=$(echo "$output" | awk '{print $4;}')
+    digest=$(echo "$output" | awk '{print $NF;}')
     run_skopeo manifest-digest $TESTDIR/busybox/manifest.json
     expect_output $digest
 }

systemtest/helpers.bash

@@ -10,7 +10,7 @@ SKOPEO_BINARY=${SKOPEO_BINARY:-${TEST_SOURCE_DIR}/../bin/skopeo}
 SKOPEO_TIMEOUT=${SKOPEO_TIMEOUT:-300}
 
 # Default image to run as a local registry
-REGISTRY_FQIN=${SKOPEO_TEST_REGISTRY_FQIN:-quay.io/libpod/registry:2.8.2}
+REGISTRY_FQIN=${SKOPEO_TEST_REGISTRY_FQIN:-quay.io/libpod/registry:2}
 
 ###############################################################################
 # BEGIN setup/teardown

vendor/dario.cat/mergo/.deepsource.toml

@@ -9,4 +9,4 @@ name = "go"
 enabled = true
 
   [analyzers.meta]
-  import_path = "github.com/imdario/mergo"
+  import_path = "dario.cat/mergo"

vendor/dario.cat/mergo/CONTRIBUTING.md

@@ -0,0 +1,112 @@
+<!-- omit in toc -->
+# Contributing to mergo
+
+First off, thanks for taking the time to contribute! ❤️
+
+All types of contributions are encouraged and valued. See the [Table of Contents](#table-of-contents) for different ways to help and details about how this project handles them. Please make sure to read the relevant section before making your contribution. It will make it a lot easier for us maintainers and smooth out the experience for all involved. The community looks forward to your contributions. 🎉
+
+> And if you like the project, but just don't have time to contribute, that's fine. There are other easy ways to support the project and show your appreciation, which we would also be very happy about:
+> - Star the project
+> - Tweet about it
+> - Refer this project in your project's readme
+> - Mention the project at local meetups and tell your friends/colleagues
+
+<!-- omit in toc -->
+## Table of Contents
+
+- [Code of Conduct](#code-of-conduct)
+- [I Have a Question](#i-have-a-question)
+- [I Want To Contribute](#i-want-to-contribute)
+- [Reporting Bugs](#reporting-bugs)
+- [Suggesting Enhancements](#suggesting-enhancements)
+
+## Code of Conduct
+
+This project and everyone participating in it is governed by the
+[mergo Code of Conduct](https://github.com/imdario/mergoblob/master/CODE_OF_CONDUCT.md).
+By participating, you are expected to uphold this code. Please report unacceptable behavior
+to <>.
+
+
+## I Have a Question
+
+> If you want to ask a question, we assume that you have read the available [Documentation](https://pkg.go.dev/github.com/imdario/mergo).
+
+Before you ask a question, it is best to search for existing [Issues](https://github.com/imdario/mergo/issues) that might help you. In case you have found a suitable issue and still need clarification, you can write your question in this issue. It is also advisable to search the internet for answers first.
+
+If you then still feel the need to ask a question and need clarification, we recommend the following:
+
+- Open an [Issue](https://github.com/imdario/mergo/issues/new).
+- Provide as much context as you can about what you're running into.
+- Provide project and platform versions (nodejs, npm, etc), depending on what seems relevant.
+
+We will then take care of the issue as soon as possible.
+
+## I Want To Contribute
+
+> ### Legal Notice <!-- omit in toc -->
+> When contributing to this project, you must agree that you have authored 100% of the content, that you have the necessary rights to the content and that the content you contribute may be provided under the project license.
+
+### Reporting Bugs
+
+<!-- omit in toc -->
+#### Before Submitting a Bug Report
+
+A good bug report shouldn't leave others needing to chase you up for more information. Therefore, we ask you to investigate carefully, collect information and describe the issue in detail in your report. Please complete the following steps in advance to help us fix any potential bug as fast as possible.
+
+- Make sure that you are using the latest version.
+- Determine if your bug is really a bug and not an error on your side e.g. using incompatible environment components/versions (Make sure that you have read the [documentation](). If you are looking for support, you might want to check [this section](#i-have-a-question)).
+- To see if other users have experienced (and potentially already solved) the same issue you are having, check if there is not already a bug report existing for your bug or error in the [bug tracker](https://github.com/imdario/mergoissues?q=label%3Abug).
+- Also make sure to search the internet (including Stack Overflow) to see if users outside of the GitHub community have discussed the issue.
+- Collect information about the bug:
+- Stack trace (Traceback)
+- OS, Platform and Version (Windows, Linux, macOS, x86, ARM)
+- Version of the interpreter, compiler, SDK, runtime environment, package manager, depending on what seems relevant.
+- Possibly your input and the output
+- Can you reliably reproduce the issue? And can you also reproduce it with older versions?
+
+<!-- omit in toc -->
+#### How Do I Submit a Good Bug Report?
+
+> You must never report security related issues, vulnerabilities or bugs including sensitive information to the issue tracker, or elsewhere in public. Instead sensitive bugs must be sent by email to .
+<!-- You may add a PGP key to allow the messages to be sent encrypted as well. -->
+
+We use GitHub issues to track bugs and errors. If you run into an issue with the project:
+
+- Open an [Issue](https://github.com/imdario/mergo/issues/new). (Since we can't be sure at this point whether it is a bug or not, we ask you not to talk about a bug yet and not to label the issue.)
+- Explain the behavior you would expect and the actual behavior.
+- Please provide as much context as possible and describe the *reproduction steps* that someone else can follow to recreate the issue on their own. This usually includes your code. For good bug reports you should isolate the problem and create a reduced test case.
+- Provide the information you collected in the previous section.
+
+Once it's filed:
+
+- The project team will label the issue accordingly.
+- A team member will try to reproduce the issue with your provided steps. If there are no reproduction steps or no obvious way to reproduce the issue, the team will ask you for those steps and mark the issue as `needs-repro`. Bugs with the `needs-repro` tag will not be addressed until they are reproduced.
+- If the team is able to reproduce the issue, it will be marked `needs-fix`, as well as possibly other tags (such as `critical`), and the issue will be left to be implemented by someone.
+
+### Suggesting Enhancements
+
+This section guides you through submitting an enhancement suggestion for mergo, **including completely new features and minor improvements to existing functionality**. Following these guidelines will help maintainers and the community to understand your suggestion and find related suggestions.
+
+<!-- omit in toc -->
+#### Before Submitting an Enhancement
+
+- Make sure that you are using the latest version.
+- Read the [documentation]() carefully and find out if the functionality is already covered, maybe by an individual configuration.
+- Perform a [search](https://github.com/imdario/mergo/issues) to see if the enhancement has already been suggested. If it has, add a comment to the existing issue instead of opening a new one.
+- Find out whether your idea fits with the scope and aims of the project. It's up to you to make a strong case to convince the project's developers of the merits of this feature. Keep in mind that we want features that will be useful to the majority of our users and not just a small subset. If you're just targeting a minority of users, consider writing an add-on/plugin library.
+
+<!-- omit in toc -->
+#### How Do I Submit a Good Enhancement Suggestion?
+
+Enhancement suggestions are tracked as [GitHub issues](https://github.com/imdario/mergo/issues).
+
+- Use a **clear and descriptive title** for the issue to identify the suggestion.
+- Provide a **step-by-step description of the suggested enhancement** in as many details as possible.
+- **Describe the current behavior** and **explain which behavior you expected to see instead** and why. At this point you can also tell which alternatives do not work for you.
+- You may want to **include screenshots and animated GIFs** which help you demonstrate the steps or point out the part which the suggestion is related to. You can use [this tool](https://www.cockos.com/licecap/) to record GIFs on macOS and Windows, and [this tool](https://github.com/colinkeenan/silentcast) or [this tool](https://github.com/GNOME/byzanz) on Linux. <!-- this should only be included if the project has a GUI -->
+- **Explain why this enhancement would be useful** to most mergo users. You may also want to point out the other projects that solved it better and which could serve as inspiration.
+
+<!-- omit in toc -->
+## Attribution
+This guide is based on the **contributing-gen**. [Make your own](https://github.com/bttger/contributing-gen)!

vendor/dario.cat/mergo/README.md

@@ -1,17 +1,20 @@
 # Mergo
 
-
-[![GoDoc][3]][4]
 [![GitHub release][5]][6]
 [![GoCard][7]][8]
-[![Build Status][1]][2]
-[![Coverage Status][9]][10]
+[![Test status][1]][2]
+[![OpenSSF Scorecard][21]][22]
+[![OpenSSF Best Practices][19]][20]
+[![Coverage status][9]][10]
 [![Sourcegraph][11]][12]
-[![FOSSA Status][13]][14]
-[![Become my sponsor][15]][16]
+[![FOSSA status][13]][14]
 
-[1]: https://travis-ci.org/imdario/mergo.png
-[2]: https://travis-ci.org/imdario/mergo
+[![GoDoc][3]][4]
+[![Become my sponsor][15]][16]
+[![Tidelift][17]][18]
+
+[1]: https://github.com/imdario/mergo/workflows/tests/badge.svg?branch=master
+[2]: https://github.com/imdario/mergo/actions/workflows/tests.yml
 [3]: https://godoc.org/github.com/imdario/mergo?status.svg
 [4]: https://godoc.org/github.com/imdario/mergo
 [5]: https://img.shields.io/github/release/imdario/mergo.svg
@@ -26,6 +29,12 @@
 [14]: https://app.fossa.io/projects/git%2Bgithub.com%2Fimdario%2Fmergo?ref=badge_shield
 [15]: https://img.shields.io/github/sponsors/imdario
 [16]: https://github.com/sponsors/imdario
+[17]: https://tidelift.com/badges/package/go/github.com%2Fimdario%2Fmergo
+[18]: https://tidelift.com/subscription/pkg/go-github.com-imdario-mergo
+[19]: https://bestpractices.coreinfrastructure.org/projects/7177/badge
+[20]: https://bestpractices.coreinfrastructure.org/projects/7177
+[21]: https://api.securityscorecards.dev/projects/github.com/imdario/mergo/badge
+[22]: https://api.securityscorecards.dev/projects/github.com/imdario/mergo
 
 A helper to merge structs and maps in Golang. Useful for configuration default values, avoiding messy if-statements.
 
@@ -37,13 +46,19 @@ Also a lovely [comune](http://en.wikipedia.org/wiki/Mergo) (municipality) in the
 
 It is ready for production use. [It is used in several projects by Docker, Google, The Linux Foundation, VMWare, Shopify, Microsoft, etc](https://github.com/imdario/mergo#mergo-in-the-wild).
 
-### Important note
+### Important notes
+
+#### 1.0.0
+
+In [1.0.0](//github.com/imdario/mergo/releases/tag/1.0.0) Mergo moves to a vanity URL `dario.cat/mergo`.
+
+#### 0.3.9
 
 Please keep in mind that a problematic PR broke [0.3.9](//github.com/imdario/mergo/releases/tag/0.3.9). I reverted it in [0.3.10](//github.com/imdario/mergo/releases/tag/0.3.10), and I consider it stable but not bug-free. Also, this version adds support for go modules.
 
 Keep in mind that in [0.3.2](//github.com/imdario/mergo/releases/tag/0.3.2), Mergo changed `Merge()`and `Map()` signatures to support [transformers](#transformers). I added an optional/variadic argument so that it won't break the existing code.
 
-If you were using Mergo before April 6th, 2015, please check your project works as intended after updating your local copy with ```go get -u github.com/imdario/mergo```. I apologize for any issue caused by its previous behavior and any future bug that Mergo could cause in existing projects after the change (release 0.2.0).
+If you were using Mergo before April 6th, 2015, please check your project works as intended after updating your local copy with ```go get -u dario.cat/mergo```. I apologize for any issue caused by its previous behavior and any future bug that Mergo could cause in existing projects after the change (release 0.2.0).
 
 ### Donations
 
@@ -55,7 +70,6 @@ If Mergo is useful to you, consider buying me a coffee, a beer, or making a mont
 
 ### Mergo in the wild
 
-- [cli/cli](https://github.com/cli/cli)
 - [moby/moby](https://github.com/moby/moby)
 - [kubernetes/kubernetes](https://github.com/kubernetes/kubernetes)
 - [vmware/dispatch](https://github.com/vmware/dispatch)
@@ -102,11 +116,11 @@ If Mergo is useful to you, consider buying me a coffee, a beer, or making a mont
 
 ## Install
 
-    go get github.com/imdario/mergo
+    go get dario.cat/mergo
 
     // use in your .go code
     import (
-        "github.com/imdario/mergo"
+        "dario.cat/mergo"
     )
 
 ## Usage
@@ -144,7 +158,7 @@ package main
 
 import (
 	"fmt"
-	"github.com/imdario/mergo"
+	"dario.cat/mergo"
 )
 
 type Foo struct {
@@ -180,9 +194,9 @@ package main
 
 import (
 	"fmt"
-	"github.com/imdario/mergo"
-        "reflect"
-        "time"
+	"dario.cat/mergo"
+    "reflect"
+    "time"
 )
 
 type timeTransformer struct {
@@ -231,5 +245,4 @@ Written by [Dario Castañé](http://dario.im).
 
 [BSD 3-Clause](http://opensource.org/licenses/BSD-3-Clause) license, as [Go language](http://golang.org/LICENSE).
 
-
 [![FOSSA Status](https://app.fossa.io/api/projects/git%2Bgithub.com%2Fimdario%2Fmergo.svg?type=large)](https://app.fossa.io/projects/git%2Bgithub.com%2Fimdario%2Fmergo?ref=badge_large)

vendor/dario.cat/mergo/SECURITY.md

@@ -0,0 +1,14 @@
+# Security Policy
+
+## Supported Versions
+
+| Version | Supported          |
+| ------- | ------------------ |
+| 0.3.x   | :white_check_mark: |
+| < 0.3   | :x:                |
+
+## Security contact information
+
+To report a security vulnerability, please use the
+[Tidelift security contact](https://tidelift.com/security).
+Tidelift will coordinate the fix and disclosure.

vendor/dario.cat/mergo/doc.go

@@ -8,30 +8,36 @@ A helper to merge structs and maps in Golang. Useful for configuration default v
 
 Mergo merges same-type structs and maps by setting default values in zero-value fields. Mergo won't merge unexported (private) fields. It will do recursively any exported one. It also won't merge structs inside maps (because they are not addressable using Go reflection).
 
-Status
+# Status
 
 It is ready for production use. It is used in several projects by Docker, Google, The Linux Foundation, VMWare, Shopify, etc.
 
-Important note
+# Important notes
+
+1.0.0
+
+In 1.0.0 Mergo moves to a vanity URL `dario.cat/mergo`.
+
+0.3.9
 
 Please keep in mind that a problematic PR broke 0.3.9. We reverted it in 0.3.10. We consider 0.3.10 as stable but not bug-free. . Also, this version adds suppot for go modules.
 
 Keep in mind that in 0.3.2, Mergo changed Merge() and Map() signatures to support transformers. We added an optional/variadic argument so that it won't break the existing code.
 
-If you were using Mergo before April 6th, 2015, please check your project works as intended after updating your local copy with go get -u github.com/imdario/mergo. I apologize for any issue caused by its previous behavior and any future bug that Mergo could cause in existing projects after the change (release 0.2.0).
+If you were using Mergo before April 6th, 2015, please check your project works as intended after updating your local copy with go get -u dario.cat/mergo. I apologize for any issue caused by its previous behavior and any future bug that Mergo could cause in existing projects after the change (release 0.2.0).
 
-Install
+# Install
 
 Do your usual installation procedure:
 
-    go get github.com/imdario/mergo
+	go get dario.cat/mergo
 
-    // use in your .go code
-    import (
-        "github.com/imdario/mergo"
-    )
+	// use in your .go code
+	import (
+	    "dario.cat/mergo"
+	)
 
-Usage
+# Usage
 
 You can only merge same-type structs with exported fields initialized as zero value of their type and same-types maps. Mergo won't merge unexported (private) fields but will do recursively any exported one. It won't merge empty structs value as they are zero values too. Also, maps will be merged recursively except for structs inside maps (because they are not addressable using Go reflection).
 
@@ -59,7 +65,7 @@ Here is a nice example:
 
 	import (
 		"fmt"
-		"github.com/imdario/mergo"
+		"dario.cat/mergo"
 	)
 
 	type Foo struct {
@@ -81,7 +87,7 @@ Here is a nice example:
 		// {two 2}
 	}
 
-Transformers
+# Transformers
 
 Transformers allow to merge specific types differently than in the default behavior. In other words, now you can customize how some types are merged. For example, time.Time is a struct; it doesn't have zero value but IsZero can return true because it has fields with zero value. How can we merge a non-zero time.Time?
 
@@ -89,9 +95,9 @@ Transformers allow to merge specific types differently than in the default behav
 
 	import (
 		"fmt"
-		"github.com/imdario/mergo"
-			"reflect"
-			"time"
+		"dario.cat/mergo"
+		"reflect"
+		"time"
 	)
 
 	type timeTransformer struct {
@@ -127,17 +133,16 @@ Transformers allow to merge specific types differently than in the default behav
 		// { 2018-01-12 01:15:00 +0000 UTC m=+0.000000001 }
 	}
 
-Contact me
+# Contact me
 
 If I can help you, you have an idea or you are using Mergo in your projects, don't hesitate to drop me a line (or a pull request): https://twitter.com/im_dario
 
-About
+# About
 
 Written by Dario Castañé: https://da.rio.hn
 
-License
+# License
 
 BSD 3-Clause license, as Go language.
-
 */
 package mergo

vendor/dario.cat/mergo/map.go

@@ -44,7 +44,7 @@ func deepMap(dst, src reflect.Value, visited map[uintptr]*visit, depth int, conf
 			}
 		}
 		// Remember, remember...
-		visited[h] = &visit{addr, typ, seen}
+		visited[h] = &visit{typ, seen, addr}
 	}
 	zeroValue := reflect.Value{}
 	switch dst.Kind() {
@@ -58,7 +58,7 @@ func deepMap(dst, src reflect.Value, visited map[uintptr]*visit, depth int, conf
 			}
 			fieldName := field.Name
 			fieldName = changeInitialCase(fieldName, unicode.ToLower)
-			if v, ok := dstMap[fieldName]; !ok || (isEmptyValue(reflect.ValueOf(v)) || overwrite) {
+			if v, ok := dstMap[fieldName]; !ok || (isEmptyValue(reflect.ValueOf(v), !config.ShouldNotDereference) || overwrite) {
 				dstMap[fieldName] = src.Field(i).Interface()
 			}
 		}
@@ -142,7 +142,7 @@ func MapWithOverwrite(dst, src interface{}, opts ...func(*Config)) error {
 
 func _map(dst, src interface{}, opts ...func(*Config)) error {
 	if dst != nil && reflect.ValueOf(dst).Kind() != reflect.Ptr {
-		return ErrNonPointerAgument
+		return ErrNonPointerArgument
 	}
 	var (
 		vDst, vSrc reflect.Value

vendor/dario.cat/mergo/merge.go

@@ -38,10 +38,11 @@ func isExportedComponent(field *reflect.StructField) bool {
 }
 
 type Config struct {
+	Transformers                 Transformers
 	Overwrite                    bool
+	ShouldNotDereference         bool
 	AppendSlice                  bool
 	TypeCheck                    bool
-	Transformers                 Transformers
 	overwriteWithEmptyValue      bool
 	overwriteSliceWithEmptyValue bool
 	sliceDeepCopy                bool
@@ -76,7 +77,7 @@ func deepMerge(dst, src reflect.Value, visited map[uintptr]*visit, depth int, co
 			}
 		}
 		// Remember, remember...
-		visited[h] = &visit{addr, typ, seen}
+		visited[h] = &visit{typ, seen, addr}
 	}
 
 	if config.Transformers != nil && !isReflectNil(dst) && dst.IsValid() {
@@ -95,7 +96,7 @@ func deepMerge(dst, src reflect.Value, visited map[uintptr]*visit, depth int, co
 				}
 			}
 		} else {
-			if dst.CanSet() && (isReflectNil(dst) || overwrite) && (!isEmptyValue(src) || overwriteWithEmptySrc) {
+			if dst.CanSet() && (isReflectNil(dst) || overwrite) && (!isEmptyValue(src, !config.ShouldNotDereference) || overwriteWithEmptySrc) {
 				dst.Set(src)
 			}
 		}
@@ -110,7 +111,7 @@ func deepMerge(dst, src reflect.Value, visited map[uintptr]*visit, depth int, co
 		}
 
 		if src.Kind() != reflect.Map {
-			if overwrite {
+			if overwrite && dst.CanSet() {
 				dst.Set(src)
 			}
 			return
@@ -162,7 +163,7 @@ func deepMerge(dst, src reflect.Value, visited map[uintptr]*visit, depth int, co
 						dstSlice = reflect.ValueOf(dstElement.Interface())
 					}
 
-					if (!isEmptyValue(src) || overwriteWithEmptySrc || overwriteSliceWithEmptySrc) && (overwrite || isEmptyValue(dst)) && !config.AppendSlice && !sliceDeepCopy {
+					if (!isEmptyValue(src, !config.ShouldNotDereference) || overwriteWithEmptySrc || overwriteSliceWithEmptySrc) && (overwrite || isEmptyValue(dst, !config.ShouldNotDereference)) && !config.AppendSlice && !sliceDeepCopy {
 						if typeCheck && srcSlice.Type() != dstSlice.Type() {
 							return fmt.Errorf("cannot override two slices with different type (%s, %s)", srcSlice.Type(), dstSlice.Type())
 						}
@@ -194,22 +195,38 @@ func deepMerge(dst, src reflect.Value, visited map[uintptr]*visit, depth int, co
 					dst.SetMapIndex(key, dstSlice)
 				}
 			}
-			if dstElement.IsValid() && !isEmptyValue(dstElement) && (reflect.TypeOf(srcElement.Interface()).Kind() == reflect.Map || reflect.TypeOf(srcElement.Interface()).Kind() == reflect.Slice) {
-				continue
+
+			if dstElement.IsValid() && !isEmptyValue(dstElement, !config.ShouldNotDereference) {
+				if reflect.TypeOf(srcElement.Interface()).Kind() == reflect.Slice {
+					continue
+				}
+				if reflect.TypeOf(srcElement.Interface()).Kind() == reflect.Map && reflect.TypeOf(dstElement.Interface()).Kind() == reflect.Map {
+					continue
+				}
 			}
 
-			if srcElement.IsValid() && ((srcElement.Kind() != reflect.Ptr && overwrite) || !dstElement.IsValid() || isEmptyValue(dstElement)) {
+			if srcElement.IsValid() && ((srcElement.Kind() != reflect.Ptr && overwrite) || !dstElement.IsValid() || isEmptyValue(dstElement, !config.ShouldNotDereference)) {
 				if dst.IsNil() {
 					dst.Set(reflect.MakeMap(dst.Type()))
 				}
 				dst.SetMapIndex(key, srcElement)
 			}
 		}
+
+		// Ensure that all keys in dst are deleted if they are not in src.
+		if overwriteWithEmptySrc {
+			for _, key := range dst.MapKeys() {
+				srcElement := src.MapIndex(key)
+				if !srcElement.IsValid() {
+					dst.SetMapIndex(key, reflect.Value{})
+				}
+			}
+		}
 	case reflect.Slice:
 		if !dst.CanSet() {
 			break
 		}
-		if (!isEmptyValue(src) || overwriteWithEmptySrc || overwriteSliceWithEmptySrc) && (overwrite || isEmptyValue(dst)) && !config.AppendSlice && !sliceDeepCopy {
+		if (!isEmptyValue(src, !config.ShouldNotDereference) || overwriteWithEmptySrc || overwriteSliceWithEmptySrc) && (overwrite || isEmptyValue(dst, !config.ShouldNotDereference)) && !config.AppendSlice && !sliceDeepCopy {
 			dst.Set(src)
 		} else if config.AppendSlice {
 			if src.Type() != dst.Type() {
@@ -244,12 +261,18 @@ func deepMerge(dst, src reflect.Value, visited map[uintptr]*visit, depth int, co
 
 		if src.Kind() != reflect.Interface {
 			if dst.IsNil() || (src.Kind() != reflect.Ptr && overwrite) {
-				if dst.CanSet() && (overwrite || isEmptyValue(dst)) {
+				if dst.CanSet() && (overwrite || isEmptyValue(dst, !config.ShouldNotDereference)) {
 					dst.Set(src)
 				}
 			} else if src.Kind() == reflect.Ptr {
-				if err = deepMerge(dst.Elem(), src.Elem(), visited, depth+1, config); err != nil {
-					return
+				if !config.ShouldNotDereference {
+					if err = deepMerge(dst.Elem(), src.Elem(), visited, depth+1, config); err != nil {
+						return
+					}
+				} else {
+					if overwriteWithEmptySrc || (overwrite && !src.IsNil()) || dst.IsNil() {
+						dst.Set(src)
+					}
 				}
 			} else if dst.Elem().Type() == src.Type() {
 				if err = deepMerge(dst.Elem(), src, visited, depth+1, config); err != nil {
@@ -262,7 +285,7 @@ func deepMerge(dst, src reflect.Value, visited map[uintptr]*visit, depth int, co
 		}
 
 		if dst.IsNil() || overwrite {
-			if dst.CanSet() && (overwrite || isEmptyValue(dst)) {
+			if dst.CanSet() && (overwrite || isEmptyValue(dst, !config.ShouldNotDereference)) {
 				dst.Set(src)
 			}
 			break
@@ -275,7 +298,7 @@ func deepMerge(dst, src reflect.Value, visited map[uintptr]*visit, depth int, co
 			break
 		}
 	default:
-		mustSet := (isEmptyValue(dst) || overwrite) && (!isEmptyValue(src) || overwriteWithEmptySrc)
+		mustSet := (isEmptyValue(dst, !config.ShouldNotDereference) || overwrite) && (!isEmptyValue(src, !config.ShouldNotDereference) || overwriteWithEmptySrc)
 		if mustSet {
 			if dst.CanSet() {
 				dst.Set(src)
@@ -326,6 +349,12 @@ func WithOverrideEmptySlice(config *Config) {
 	config.overwriteSliceWithEmptyValue = true
 }
 
+// WithoutDereference prevents dereferencing pointers when evaluating whether they are empty
+// (i.e. a non-nil pointer is never considered empty).
+func WithoutDereference(config *Config) {
+	config.ShouldNotDereference = true
+}
+
 // WithAppendSlice will make merge append slices instead of overwriting it.
 func WithAppendSlice(config *Config) {
 	config.AppendSlice = true
@@ -344,7 +373,7 @@ func WithSliceDeepCopy(config *Config) {
 
 func merge(dst, src interface{}, opts ...func(*Config)) error {
 	if dst != nil && reflect.ValueOf(dst).Kind() != reflect.Ptr {
-		return ErrNonPointerAgument
+		return ErrNonPointerArgument
 	}
 	var (
 		vDst, vSrc reflect.Value

vendor/dario.cat/mergo/mergo.go

@@ -20,7 +20,7 @@ var (
 	ErrNotSupported                = errors.New("only structs, maps, and slices are supported")
 	ErrExpectedMapAsDestination    = errors.New("dst was expected to be a map")
 	ErrExpectedStructAsDestination = errors.New("dst was expected to be a struct")
-	ErrNonPointerAgument           = errors.New("dst must be a pointer")
+	ErrNonPointerArgument          = errors.New("dst must be a pointer")
 )
 
 // During deepMerge, must keep track of checks that are
@@ -28,13 +28,13 @@ var (
 // checks in progress are true when it reencounters them.
 // Visited are stored in a map indexed by 17 * a1 + a2;
 type visit struct {
-	ptr  uintptr
 	typ  reflect.Type
 	next *visit
+	ptr  uintptr
 }
 
 // From src/pkg/encoding/json/encode.go.
-func isEmptyValue(v reflect.Value) bool {
+func isEmptyValue(v reflect.Value, shouldDereference bool) bool {
 	switch v.Kind() {
 	case reflect.Array, reflect.Map, reflect.Slice, reflect.String:
 		return v.Len() == 0
@@ -50,7 +50,10 @@ func isEmptyValue(v reflect.Value) bool {
 		if v.IsNil() {
 			return true
 		}
-		return isEmptyValue(v.Elem())
+		if shouldDereference {
+			return isEmptyValue(v.Elem(), shouldDereference)
+		}
+		return false
 	case reflect.Func:
 		return v.IsNil()
 	case reflect.Invalid:

vendor/github.com/BurntSushi/toml/decode.go

@@ -21,7 +21,9 @@ type Unmarshaler interface {
 	UnmarshalTOML(interface{}) error
 }
 
-// Unmarshal decodes the contents of `data` in TOML format into a pointer `v`.
+// Unmarshal decodes the contents of data in TOML format into a pointer v.
+//
+// See [Decoder] for a description of the decoding process.
 func Unmarshal(data []byte, v interface{}) error {
 	_, err := NewDecoder(bytes.NewReader(data)).Decode(v)
 	return err
@@ -29,13 +31,12 @@ func Unmarshal(data []byte, v interface{}) error {
 
 // Decode the TOML data in to the pointer v.
 //
-// See the documentation on Decoder for a description of the decoding process.
+// See [Decoder] for a description of the decoding process.
 func Decode(data string, v interface{}) (MetaData, error) {
 	return NewDecoder(strings.NewReader(data)).Decode(v)
 }
 
-// DecodeFile is just like Decode, except it will automatically read the
-// contents of the file at path and decode it for you.
+// DecodeFile reads the contents of a file and decodes it with [Decode].
 func DecodeFile(path string, v interface{}) (MetaData, error) {
 	fp, err := os.Open(path)
 	if err != nil {
@@ -48,7 +49,7 @@ func DecodeFile(path string, v interface{}) (MetaData, error) {
 // Primitive is a TOML value that hasn't been decoded into a Go value.
 //
 // This type can be used for any value, which will cause decoding to be delayed.
-// You can use the PrimitiveDecode() function to "manually" decode these values.
+// You can use [PrimitiveDecode] to "manually" decode these values.
 //
 // NOTE: The underlying representation of a `Primitive` value is subject to
 // change. Do not rely on it.
@@ -70,15 +71,15 @@ const (
 
 // Decoder decodes TOML data.
 //
-// TOML tables correspond to Go structs or maps (dealer's choice – they can be
-// used interchangeably).
+// TOML tables correspond to Go structs or maps; they can be used
+// interchangeably, but structs offer better type safety.
 //
 // TOML table arrays correspond to either a slice of structs or a slice of maps.
 //
-// TOML datetimes correspond to Go time.Time values. Local datetimes are parsed
-// in the local timezone.
+// TOML datetimes correspond to [time.Time]. Local datetimes are parsed in the
+// local timezone.
 //
-// time.Duration types are treated as nanoseconds if the TOML value is an
+// [time.Duration] types are treated as nanoseconds if the TOML value is an
 // integer, or they're parsed with time.ParseDuration() if they're strings.
 //
 // All other TOML types (float, string, int, bool and array) correspond to the
@@ -90,7 +91,7 @@ const (
 // UnmarshalText method. See the Unmarshaler example for a demonstration with
 // email addresses.
 //
-// Key mapping
+// # Key mapping
 //
 // TOML keys can map to either keys in a Go map or field names in a Go struct.
 // The special `toml` struct tag can be used to map TOML keys to struct fields
@@ -168,17 +169,16 @@ func (dec *Decoder) Decode(v interface{}) (MetaData, error) {
 	return md, md.unify(p.mapping, rv)
 }
 
-// PrimitiveDecode is just like the other `Decode*` functions, except it
-// decodes a TOML value that has already been parsed. Valid primitive values
-// can *only* be obtained from values filled by the decoder functions,
-// including this method. (i.e., `v` may contain more `Primitive`
-// values.)
+// PrimitiveDecode is just like the other Decode* functions, except it decodes a
+// TOML value that has already been parsed. Valid primitive values can *only* be
+// obtained from values filled by the decoder functions, including this method.
+// (i.e., v may contain more [Primitive] values.)
 //
-// Meta data for primitive values is included in the meta data returned by
-// the `Decode*` functions with one exception: keys returned by the Undecoded
-// method will only reflect keys that were decoded. Namely, any keys hidden
-// behind a Primitive will be considered undecoded. Executing this method will
-// update the undecoded keys in the meta data. (See the example.)
+// Meta data for primitive values is included in the meta data returned by the
+// Decode* functions with one exception: keys returned by the Undecoded method
+// will only reflect keys that were decoded. Namely, any keys hidden behind a
+// Primitive will be considered undecoded. Executing this method will update the
+// undecoded keys in the meta data. (See the example.)
 func (md *MetaData) PrimitiveDecode(primValue Primitive, v interface{}) error {
 	md.context = primValue.context
 	defer func() { md.context = nil }()
@@ -248,7 +248,7 @@ func (md *MetaData) unify(data interface{}, rv reflect.Value) error {
 	case reflect.Bool:
 		return md.unifyBool(data, rv)
 	case reflect.Interface:
-		if rv.NumMethod() > 0 { // Only support empty interfaces are supported.
+		if rv.NumMethod() > 0 { /// Only empty interfaces are supported.
 			return md.e("unsupported type %s", rv.Type())
 		}
 		return md.unifyAnything(data, rv)

vendor/github.com/BurntSushi/toml/decode_go116.go

@@ -7,8 +7,8 @@ import (
 	"io/fs"
 )
 
-// DecodeFS is just like Decode, except it will automatically read the contents
-// of the file at `path` from a fs.FS instance.
+// DecodeFS reads the contents of a file from [fs.FS] and decodes it with
+// [Decode].
 func DecodeFS(fsys fs.FS, path string, v interface{}) (MetaData, error) {
 	fp, err := fsys.Open(path)
 	if err != nil {

vendor/github.com/BurntSushi/toml/deprecated.go

@@ -5,17 +5,25 @@ import (
 	"io"
 )
 
+// TextMarshaler is an alias for encoding.TextMarshaler.
+//
 // Deprecated: use encoding.TextMarshaler
 type TextMarshaler encoding.TextMarshaler
 
+// TextUnmarshaler is an alias for encoding.TextUnmarshaler.
+//
 // Deprecated: use encoding.TextUnmarshaler
 type TextUnmarshaler encoding.TextUnmarshaler
 
+// PrimitiveDecode is an alias for MetaData.PrimitiveDecode().
+//
 // Deprecated: use MetaData.PrimitiveDecode.
 func PrimitiveDecode(primValue Primitive, v interface{}) error {
 	md := MetaData{decoded: make(map[string]struct{})}
 	return md.unify(primValue.undecoded, rvalue(v))
 }
 
+// DecodeReader is an alias for NewDecoder(r).Decode(v).
+//
 // Deprecated: use NewDecoder(reader).Decode(&value).
 func DecodeReader(r io.Reader, v interface{}) (MetaData, error) { return NewDecoder(r).Decode(v) }

vendor/github.com/BurntSushi/toml/doc.go

@@ -1,13 +1,11 @@
-/*
-Package toml implements decoding and encoding of TOML files.
-
-This package supports TOML v1.0.0, as listed on https://toml.io
-
-There is also support for delaying decoding with the Primitive type, and
-querying the set of keys in a TOML document with the MetaData type.
-
-The github.com/BurntSushi/toml/cmd/tomlv package implements a TOML validator,
-and can be used to verify if TOML document is valid. It can also be used to
-print the type of each key.
-*/
+// Package toml implements decoding and encoding of TOML files.
+//
+// This package supports TOML v1.0.0, as specified at https://toml.io
+//
+// There is also support for delaying decoding with the Primitive type, and
+// querying the set of keys in a TOML document with the MetaData type.
+//
+// The github.com/BurntSushi/toml/cmd/tomlv package implements a TOML validator,
+// and can be used to verify if TOML document is valid. It can also be used to
+// print the type of each key.
 package toml

vendor/github.com/BurntSushi/toml/encode.go

@@ -79,12 +79,12 @@ type Marshaler interface {
 // Encoder encodes a Go to a TOML document.
 //
 // The mapping between Go values and TOML values should be precisely the same as
-// for the Decode* functions.
+// for [Decode].
 //
 // time.Time is encoded as a RFC 3339 string, and time.Duration as its string
 // representation.
 //
-// The toml.Marshaler and encoder.TextMarshaler interfaces are supported to
+// The [Marshaler] and [encoding.TextMarshaler] interfaces are supported to
 // encoding the value as custom TOML.
 //
 // If you want to write arbitrary binary data then you will need to use
@@ -130,13 +130,14 @@ func NewEncoder(w io.Writer) *Encoder {
 	}
 }
 
-// Encode writes a TOML representation of the Go value to the Encoder's writer.
+// Encode writes a TOML representation of the Go value to the [Encoder]'s writer.
 //
 // An error is returned if the value given cannot be encoded to a valid TOML
 // document.
 func (enc *Encoder) Encode(v interface{}) error {
 	rv := eindirect(reflect.ValueOf(v))
-	if err := enc.safeEncode(Key([]string{}), rv); err != nil {
+	err := enc.safeEncode(Key([]string{}), rv)
+	if err != nil {
 		return err
 	}
 	return enc.w.Flush()
@@ -261,7 +262,7 @@ func (enc *Encoder) eElement(rv reflect.Value) {
 			enc.eElement(reflect.ValueOf(v))
 			return
 		}
-		encPanic(errors.New(fmt.Sprintf("Unable to convert \"%s\" to neither int64 nor float64", n)))
+		encPanic(fmt.Errorf("unable to convert %q to int64 or float64", n))
 	}
 
 	switch rv.Kind() {
@@ -457,6 +458,16 @@ func (enc *Encoder) eStruct(key Key, rv reflect.Value, inline bool) {
 
 			frv := eindirect(rv.Field(i))
 
+			if is32Bit {
+				// Copy so it works correct on 32bit archs; not clear why this
+				// is needed. See #314, and https://www.reddit.com/r/golang/comments/pnx8v4
+				// This also works fine on 64bit, but 32bit archs are somewhat
+				// rare and this is a wee bit faster.
+				copyStart := make([]int, len(start))
+				copy(copyStart, start)
+				start = copyStart
+			}
+
 			// Treat anonymous struct fields with tag names as though they are
 			// not anonymous, like encoding/json does.
 			//
@@ -471,17 +482,7 @@ func (enc *Encoder) eStruct(key Key, rv reflect.Value, inline bool) {
 			if typeIsTable(tomlTypeOfGo(frv)) {
 				fieldsSub = append(fieldsSub, append(start, f.Index...))
 			} else {
-				// Copy so it works correct on 32bit archs; not clear why this
-				// is needed. See #314, and https://www.reddit.com/r/golang/comments/pnx8v4
-				// This also works fine on 64bit, but 32bit archs are somewhat
-				// rare and this is a wee bit faster.
-				if is32Bit {
-					copyStart := make([]int, len(start))
-					copy(copyStart, start)
-					fieldsDirect = append(fieldsDirect, append(copyStart, f.Index...))
-				} else {
-					fieldsDirect = append(fieldsDirect, append(start, f.Index...))
-				}
+				fieldsDirect = append(fieldsDirect, append(start, f.Index...))
 			}
 		}
 	}
@@ -490,23 +491,27 @@ func (enc *Encoder) eStruct(key Key, rv reflect.Value, inline bool) {
 	writeFields := func(fields [][]int) {
 		for _, fieldIndex := range fields {
 			fieldType := rt.FieldByIndex(fieldIndex)
-			fieldVal := eindirect(rv.FieldByIndex(fieldIndex))
-
-			if isNil(fieldVal) { /// Don't write anything for nil fields.
-				continue
-			}
+			fieldVal := rv.FieldByIndex(fieldIndex)
 
 			opts := getOptions(fieldType.Tag)
 			if opts.skip {
 				continue
 			}
+			if opts.omitempty && isEmpty(fieldVal) {
+				continue
+			}
+
+			fieldVal = eindirect(fieldVal)
+
+			if isNil(fieldVal) { /// Don't write anything for nil fields.
+				continue
+			}
+
 			keyName := fieldType.Name
 			if opts.name != "" {
 				keyName = opts.name
 			}
-			if opts.omitempty && isEmpty(fieldVal) {
-				continue
-			}
+
 			if opts.omitzero && isZero(fieldVal) {
 				continue
 			}
@@ -653,9 +658,25 @@ func isEmpty(rv reflect.Value) bool {
 	case reflect.Array, reflect.Slice, reflect.Map, reflect.String:
 		return rv.Len() == 0
 	case reflect.Struct:
-		return reflect.Zero(rv.Type()).Interface() == rv.Interface()
+		if rv.Type().Comparable() {
+			return reflect.Zero(rv.Type()).Interface() == rv.Interface()
+		}
+		// Need to also check if all the fields are empty, otherwise something
+		// like this with uncomparable types will always return true:
+		//
+		//   type a struct{ field b }
+		//   type b struct{ s []string }
+		//   s := a{field: b{s: []string{"AAA"}}}
+		for i := 0; i < rv.NumField(); i++ {
+			if !isEmpty(rv.Field(i)) {
+				return false
+			}
+		}
+		return true
 	case reflect.Bool:
 		return !rv.Bool()
+	case reflect.Ptr:
+		return rv.IsNil()
 	}
 	return false
 }
@@ -668,19 +689,21 @@ func (enc *Encoder) newline() {
 
 // Write a key/value pair:
 //
-//   key = <any value>
+//	key = <any value>
 //
 // This is also used for "k = v" in inline tables; so something like this will
 // be written in three calls:
 //
-//     ┌────────────────────┐
-//     │      ┌───┐  ┌─────┐│
-//     v      v   v  v     vv
-//     key = {k = v, k2 = v2}
-//
+//	┌───────────────────┐
+//	│      ┌───┐  ┌────┐│
+//	v      v   v  v    vv
+//	key = {k = 1, k2 = 2}
 func (enc *Encoder) writeKeyValue(key Key, val reflect.Value, inline bool) {
+	/// Marshaler used on top-level document; call eElement() to just call
+	/// Marshal{TOML,Text}.
 	if len(key) == 0 {
-		encPanic(errNoKey)
+		enc.eElement(val)
+		return
 	}
 	enc.wf("%s%s = ", enc.indentStr(key), key.maybeQuoted(len(key)-1))
 	enc.eElement(val)

vendor/github.com/BurntSushi/toml/error.go

@@ -5,57 +5,60 @@ import (
 	"strings"
 )
 
-// ParseError is returned when there is an error parsing the TOML syntax.
-//
-// For example invalid syntax, duplicate keys, etc.
+// ParseError is returned when there is an error parsing the TOML syntax such as
+// invalid syntax, duplicate keys, etc.
 //
 // In addition to the error message itself, you can also print detailed location
-// information with context by using ErrorWithPosition():
+// information with context by using [ErrorWithPosition]:
 //
-//     toml: error: Key 'fruit' was already created and cannot be used as an array.
+//	toml: error: Key 'fruit' was already created and cannot be used as an array.
 //
-//     At line 4, column 2-7:
+//	At line 4, column 2-7:
 //
-//           2 | fruit = []
-//           3 |
-//           4 | [[fruit]] # Not allowed
-//                 ^^^^^
+//	      2 | fruit = []
+//	      3 |
+//	      4 | [[fruit]] # Not allowed
+//	            ^^^^^
 //
-// Furthermore, the ErrorWithUsage() can be used to print the above with some
-// more detailed usage guidance:
+// [ErrorWithUsage] can be used to print the above with some more detailed usage
+// guidance:
 //
-//    toml: error: newlines not allowed within inline tables
+//	toml: error: newlines not allowed within inline tables
 //
-//    At line 1, column 18:
+//	At line 1, column 18:
 //
-//          1 | x = [{ key = 42 #
-//                               ^
+//	      1 | x = [{ key = 42 #
+//	                           ^
 //
-//    Error help:
+//	Error help:
 //
-//      Inline tables must always be on a single line:
+//	  Inline tables must always be on a single line:
 //
-//          table = {key = 42, second = 43}
+//	      table = {key = 42, second = 43}
 //
-//      It is invalid to split them over multiple lines like so:
+//	  It is invalid to split them over multiple lines like so:
 //
-//          # INVALID
-//          table = {
-//              key    = 42,
-//              second = 43
-//          }
+//	      # INVALID
+//	      table = {
+//	          key    = 42,
+//	          second = 43
+//	      }
 //
-//      Use regular for this:
+//	  Use regular for this:
 //
-//          [table]
-//          key    = 42
-//          second = 43
+//	      [table]
+//	      key    = 42
+//	      second = 43
 type ParseError struct {
 	Message  string   // Short technical message.
 	Usage    string   // Longer message with usage guidance; may be blank.
 	Position Position // Position of the error
 	LastKey  string   // Last parsed key, may be blank.
-	Line     int      // Line the error occurred. Deprecated: use Position.
+
+	// Line the error occurred.
+	//
+	// Deprecated: use [Position].
+	Line int
 
 	err   error
 	input string
@@ -81,9 +84,9 @@ func (pe ParseError) Error() string {
 		pe.Position.Line, pe.LastKey, msg)
 }
 
-// ErrorWithUsage() returns the error with detailed location context.
+// ErrorWithPosition returns the error with detailed location context.
 //
-// See the documentation on ParseError.
+// See the documentation on [ParseError].
 func (pe ParseError) ErrorWithPosition() string {
 	if pe.input == "" { // Should never happen, but just in case.
 		return pe.Error()
@@ -121,10 +124,10 @@ func (pe ParseError) ErrorWithPosition() string {
 	return b.String()
 }
 
-// ErrorWithUsage() returns the error with detailed location context and usage
+// ErrorWithUsage returns the error with detailed location context and usage
 // guidance.
 //
-// See the documentation on ParseError.
+// See the documentation on [ParseError].
 func (pe ParseError) ErrorWithUsage() string {
 	m := pe.ErrorWithPosition()
 	if u, ok := pe.err.(interface{ Usage() string }); ok && u.Usage() != "" {

vendor/github.com/BurntSushi/toml/lex.go

@@ -46,12 +46,13 @@ func (p Position) String() string {
 }
 
 type lexer struct {
-	input string
-	start int
-	pos   int
-	line  int
-	state stateFn
-	items chan item
+	input    string
+	start    int
+	pos      int
+	line     int
+	state    stateFn
+	items    chan item
+	tomlNext bool
 
 	// Allow for backing up up to 4 runes. This is necessary because TOML
 	// contains 3-rune tokens (""" and ''').
@@ -87,13 +88,14 @@ func (lx *lexer) nextItem() item {
 	}
 }
 
-func lex(input string) *lexer {
+func lex(input string, tomlNext bool) *lexer {
 	lx := &lexer{
-		input: input,
-		state: lexTop,
-		items: make(chan item, 10),
-		stack: make([]stateFn, 0, 10),
-		line:  1,
+		input:    input,
+		state:    lexTop,
+		items:    make(chan item, 10),
+		stack:    make([]stateFn, 0, 10),
+		line:     1,
+		tomlNext: tomlNext,
 	}
 	return lx
 }
@@ -408,7 +410,7 @@ func lexTableNameEnd(lx *lexer) stateFn {
 // Lexes only one part, e.g. only 'a' inside 'a.b'.
 func lexBareName(lx *lexer) stateFn {
 	r := lx.next()
-	if isBareKeyChar(r) {
+	if isBareKeyChar(r, lx.tomlNext) {
 		return lexBareName
 	}
 	lx.backup()
@@ -618,6 +620,9 @@ func lexInlineTableValue(lx *lexer) stateFn {
 	case isWhitespace(r):
 		return lexSkip(lx, lexInlineTableValue)
 	case isNL(r):
+		if lx.tomlNext {
+			return lexSkip(lx, lexInlineTableValue)
+		}
 		return lx.errorPrevLine(errLexInlineTableNL{})
 	case r == '#':
 		lx.push(lexInlineTableValue)
@@ -640,6 +645,9 @@ func lexInlineTableValueEnd(lx *lexer) stateFn {
 	case isWhitespace(r):
 		return lexSkip(lx, lexInlineTableValueEnd)
 	case isNL(r):
+		if lx.tomlNext {
+			return lexSkip(lx, lexInlineTableValueEnd)
+		}
 		return lx.errorPrevLine(errLexInlineTableNL{})
 	case r == '#':
 		lx.push(lexInlineTableValueEnd)
@@ -648,6 +656,9 @@ func lexInlineTableValueEnd(lx *lexer) stateFn {
 		lx.ignore()
 		lx.skip(isWhitespace)
 		if lx.peek() == '}' {
+			if lx.tomlNext {
+				return lexInlineTableValueEnd
+			}
 			return lx.errorf("trailing comma not allowed in inline tables")
 		}
 		return lexInlineTableValue
@@ -770,8 +781,8 @@ func lexRawString(lx *lexer) stateFn {
 	}
 }
 
-// lexMultilineRawString consumes a raw string. Nothing can be escaped in such
-// a string. It assumes that the beginning "'''" has already been consumed and
+// lexMultilineRawString consumes a raw string. Nothing can be escaped in such a
+// string. It assumes that the beginning triple-' has already been consumed and
 // ignored.
 func lexMultilineRawString(lx *lexer) stateFn {
 	r := lx.next()
@@ -828,6 +839,11 @@ func lexMultilineStringEscape(lx *lexer) stateFn {
 func lexStringEscape(lx *lexer) stateFn {
 	r := lx.next()
 	switch r {
+	case 'e':
+		if !lx.tomlNext {
+			return lx.error(errLexEscape{r})
+		}
+		fallthrough
 	case 'b':
 		fallthrough
 	case 't':
@@ -846,6 +862,11 @@ func lexStringEscape(lx *lexer) stateFn {
 		fallthrough
 	case '\\':
 		return lx.pop()
+	case 'x':
+		if !lx.tomlNext {
+			return lx.error(errLexEscape{r})
+		}
+		return lexHexEscape
 	case 'u':
 		return lexShortUnicodeEscape
 	case 'U':
@@ -854,6 +875,19 @@ func lexStringEscape(lx *lexer) stateFn {
 	return lx.error(errLexEscape{r})
 }
 
+func lexHexEscape(lx *lexer) stateFn {
+	var r rune
+	for i := 0; i < 2; i++ {
+		r = lx.next()
+		if !isHexadecimal(r) {
+			return lx.errorf(
+				`expected two hexadecimal digits after '\x', but got %q instead`,
+				lx.current())
+		}
+	}
+	return lx.pop()
+}
+
 func lexShortUnicodeEscape(lx *lexer) stateFn {
 	var r rune
 	for i := 0; i < 4; i++ {
@@ -1225,7 +1259,23 @@ func isOctal(r rune) bool  { return r >= '0' && r <= '7' }
 func isHexadecimal(r rune) bool {
 	return (r >= '0' && r <= '9') || (r >= 'a' && r <= 'f') || (r >= 'A' && r <= 'F')
 }
-func isBareKeyChar(r rune) bool {
+
+func isBareKeyChar(r rune, tomlNext bool) bool {
+	if tomlNext {
+		return (r >= 'A' && r <= 'Z') ||
+			(r >= 'a' && r <= 'z') ||
+			(r >= '0' && r <= '9') ||
+			r == '_' || r == '-' ||
+			r == 0xb2 || r == 0xb3 || r == 0xb9 || (r >= 0xbc && r <= 0xbe) ||
+			(r >= 0xc0 && r <= 0xd6) || (r >= 0xd8 && r <= 0xf6) || (r >= 0xf8 && r <= 0x037d) ||
+			(r >= 0x037f && r <= 0x1fff) ||
+			(r >= 0x200c && r <= 0x200d) || (r >= 0x203f && r <= 0x2040) ||
+			(r >= 0x2070 && r <= 0x218f) || (r >= 0x2460 && r <= 0x24ff) ||
+			(r >= 0x2c00 && r <= 0x2fef) || (r >= 0x3001 && r <= 0xd7ff) ||
+			(r >= 0xf900 && r <= 0xfdcf) || (r >= 0xfdf0 && r <= 0xfffd) ||
+			(r >= 0x10000 && r <= 0xeffff)
+	}
+
 	return (r >= 'A' && r <= 'Z') ||
 		(r >= 'a' && r <= 'z') ||
 		(r >= '0' && r <= '9') ||