skopeo: drop support for ostree

drop support for the ostree backend.  The only known user for the
backend is the atomic CLI tool that is not maintained anymore
upstream.

Closes: https://bugzilla.redhat.com/show_bug.cgi?id=1766404

Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>

Dockerfile

@@ -6,7 +6,6 @@ RUN dnf -y update && dnf install -y make git golang golang-github-cpuguy83-md2ma
 	device-mapper-devel \
 	# gpgme bindings deps
 	libassuan-devel gpgme-devel \
-	ostree-devel \
 	gnupg \
 	# OpenShift deps
 	which tar wget hostname util-linux bsdtar socat ethtool device-mapper iptables tree findutils nmap-ncat e2fsprogs xfsprogs lsof docker iproute \

Dockerfile.build

@@ -7,8 +7,7 @@ RUN apt-get update && apt-get install -y \
     libdevmapper-dev \
     libgpgme11-dev \
     go-md2man \
-    libglib2.0-dev \
+    libglib2.0-dev
-    libostree-dev
 
 ENV GOPATH=/
 WORKDIR /src/github.com/containers/skopeo

Makefile

@@ -4,7 +4,7 @@ export GOPROXY=https://proxy.golang.org
 
 ifeq ($(shell uname),Darwin)
 PREFIX ?= ${DESTDIR}/usr/local
-DARWIN_BUILD_TAG=containers_image_ostree_stub
+DARWIN_BUILD_TAG=
 # On macOS, (brew install gpgme) installs it within /usr/local, but /usr/local/include is not in the default search path.
 # Rather than hard-code this directory, use gpgme-config. Sadly that must be done at the top-level user
 # instead of locally in the gpgme subpackage, because cgo supports only pkg-config, not general shell scripts,
@@ -60,12 +60,11 @@ MANPAGES ?= $(MANPAGES_MD:%.md=%)
 
 BTRFS_BUILD_TAG = $(shell hack/btrfs_tag.sh) $(shell hack/btrfs_installed_tag.sh)
 LIBDM_BUILD_TAG = $(shell hack/libdm_tag.sh)
-OSTREE_BUILD_TAG = $(shell hack/ostree_tag.sh)
+LOCAL_BUILD_TAGS = $(BTRFS_BUILD_TAG) $(LIBDM_BUILD_TAG) $(DARWIN_BUILD_TAG)
-LOCAL_BUILD_TAGS = $(BTRFS_BUILD_TAG) $(LIBDM_BUILD_TAG) $(OSTREE_BUILD_TAG) $(DARWIN_BUILD_TAG)
 BUILDTAGS += $(LOCAL_BUILD_TAGS)
 
 ifeq ($(DISABLE_CGO), 1)
-	override BUILDTAGS = containers_image_ostree_stub exclude_graphdriver_devicemapper exclude_graphdriver_btrfs containers_image_openpgp
+	override BUILDTAGS = exclude_graphdriver_devicemapper exclude_graphdriver_btrfs containers_image_openpgp
 endif
 
 #   make all DEBUG=1

README.md

@@ -37,9 +37,6 @@ Skopeo works with API V2 registries such as Docker registries, the Atomic regist
  * oci:path:tag
          An image tag in a directory compliant with "Open Container Image Layout Specification" at path.
 
- * ostree:image[@/absolute/repo/path]
-         An image in local OSTree repository.  /absolute/repo/path defaults to /ostree/repo.
-
 Inspecting a repository
 -
 `skopeo` is able to _inspect_ a repository on a Docker registry and fetch images layers.
@@ -177,10 +174,10 @@ Building without a container requires a bit more manual work and setup in your e
 Install the necessary dependencies:
 ```sh
 # Fedora:
-sudo dnf install gpgme-devel libassuan-devel btrfs-progs-devel device-mapper-devel ostree-devel
+sudo dnf install gpgme-devel libassuan-devel btrfs-progs-devel device-mapper-devel
 
 # Ubuntu (`libbtrfs-dev` requires Ubuntu 18.10 and above):
-sudo apt install libgpgme-dev libassuan-dev libbtrfs-dev libdevmapper-dev libostree-dev
+sudo apt install libgpgme-dev libassuan-dev libbtrfs-dev libdevmapper-dev
 
 # macOS:
 brew install gpgme
@@ -205,7 +202,7 @@ Building in a container is simpler, but more restrictive:
 $ make binary # Or (make all) to also build documentation, see below.
 ```
 
-To build a pure-Go static binary (disables ostree, devicemapper, btrfs, and gpgme):
+To build a pure-Go static binary (disables devicemapper, btrfs, and gpgme):
 
 ```sh
 $ make binary-static DISABLE_CGO=1

cmd/skopeo/utils.go

@@ -155,7 +155,6 @@ func (opts *imageOptions) newSystemContext() (*types.SystemContext, error) {
 // imageDestOptions is a superset of imageOptions specialized for iamge destinations.
 type imageDestOptions struct {
 	*imageOptions
-	osTreeTmpDir                string      // A directory to use for OSTree temporary files
 	dirForceCompression         bool        // Compress layers when saving to the dir: transport
 	ociAcceptUncompressedLayers bool        // Whether to accept uncompressed layers in the oci: transport
 	compressionFormat           string      // Format to use for the compression
@@ -168,11 +167,6 @@ func imageDestFlags(global *globalOptions, shared *sharedImageOptions, flagPrefi
 	opts := imageDestOptions{imageOptions: genericOptions}
 
 	return append(genericFlags, []cli.Flag{
-		cli.StringFlag{
-			Name:        flagPrefix + "ostree-tmp-dir",
-			Usage:       "`DIRECTORY` to use for OSTree temporary files",
-			Destination: &opts.osTreeTmpDir,
-		},
 		cli.BoolFlag{
 			Name:        flagPrefix + "compress",
 			Usage:       "Compress tarball image layers when saving to directory using the 'dir' transport. (default is same compression type as source)",
@@ -204,7 +198,6 @@ func (opts *imageDestOptions) newSystemContext() (*types.SystemContext, error) {
 		return nil, err
 	}
 
-	ctx.OSTreeTmpDirPath = opts.osTreeTmpDir
 	ctx.DirForceCompress = opts.dirForceCompression
 	ctx.OCIAcceptUncompressedLayers = opts.ociAcceptUncompressedLayers
 	if opts.compressionFormat != "" {

cmd/skopeo/utils_test.go

@@ -152,7 +152,6 @@ func TestImageDestOptionsNewSystemContext(t *testing.T) {
 	}, []string{
 		"--authfile", "/srv/authfile",
 		"--dest-cert-dir", "/srv/cert-dir",
-		"--dest-ostree-tmp-dir", "/srv/ostree-tmp-dir",
 		"--dest-shared-blob-dir", "/srv/shared-blob-dir",
 		"--dest-compress=true",
 		"--dest-daemon-host", "daemon-host.example.com",
@@ -170,7 +169,6 @@ func TestImageDestOptionsNewSystemContext(t *testing.T) {
 		DockerCertPath:                    "/srv/cert-dir",
 		DockerInsecureSkipTLSVerify:       types.OptionalBoolTrue,
 		DockerAuthConfig:                  &types.DockerAuthConfig{Username: "creds-user", Password: "creds-password"},
-		OSTreeTmpDirPath:                  "/srv/ostree-tmp-dir",
 		DockerDaemonCertPath:              "/srv/cert-dir",
 		DockerDaemonHost:                  "daemon-host.example.com",
 		DockerDaemonInsecureSkipTLSVerify: true,

completions/bash/skopeo

@@ -44,7 +44,6 @@ _skopeo_copy() {
     --src-tls-verify
     --dest-creds --dcreds
     --dest-cert-dir
-    --dest-ostree-tmp-dir
     --dest-tls-verify
     --src-daemon-host
     --dest-daemon-host

docs/skopeo-copy.1.md

@@ -54,8 +54,6 @@ If the authorization state is not found there, $HOME/.docker/config.json is chec
 
 **--dest-no-creds** _bool-value_  Access the registry anonymously.
 
-**--dest-ostree-tmp-dir** _path_ Directory to use for OSTree temporary files.
-
 **--dest-tls-verify** _bool-value_ Require HTTPS and verify certificates when talking to container destination registry or daemon (defaults to true)
 
 **--src-daemon-host** _host_ Copy from docker daemon at _host_. If _host_ starts with `tcp://`, HTTPS is enabled by default. To use plain HTTP, use the form `http://` (default is `unix:///var/run/docker.sock`).

docs/skopeo.1.md

@@ -44,9 +44,6 @@ Most commands refer to container images, using a _transport_`:`_details_ format.
   **oci:**_path_**:**_tag_
   An image _tag_ in a directory compliant with "Open Container Image Layout Specification" at _path_.
 
-  **ostree:**_image_[**@**_/absolute/repo/path_]
-  An image in local OSTree repository.  _/absolute/repo/path_ defaults to _/ostree/repo_.
-
 ## OPTIONS
 
   **--debug** enable debug output

hack/ostree_tag.sh

@@ -1,11 +0,0 @@
-#!/bin/bash
-
-if test $(${GO:-go} env GOOS) != "linux" ; then
-	exit 0
-fi
-
-if pkg-config ostree-1 &> /dev/null ; then
-	# ostree: used by containers/storage
-	# containers_image_ostree: used by containers/image
-	echo "ostree containers_image_ostree"
-fi