Update hack scripts to use go mod

hack/pin-dependency.sh

@@ -0,0 +1,70 @@
+#!/usr/bin/env bash
+
+# Copyright 2019 The Kubernetes Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+set -o errexit
+set -o nounset
+set -o pipefail
+
+KUBE_ROOT=$(dirname "${BASH_SOURCE[0]}")/..
+source "${KUBE_ROOT}/hack/lib/init.sh"
+
+# Usage:
+#   hack/pin-dependency.sh $MODULE $SHA-OR-TAG
+#
+# Example:
+#   hack/pin-dependency.sh github.com/docker/docker 501cb131a7b7
+
+# Explicitly opt into go modules, even though we're inside a GOPATH directory
+export GO111MODULE=on
+# Explicitly clear GOPATH, to ensure nothing this script calls makes use of that path info
+export GOPATH=
+# Explicitly clear GOFLAGS, since GOFLAGS=-mod=vendor breaks dependency resolution while rebuilding vendor
+export GOFLAGS=
+# Detect problematic GOPROXY settings that prevent lookup of dependencies
+if [[ "${GOPROXY:-}" == "off" ]]; then
+  kube::log::error "Cannot run hack/pin-dependency.sh with \$GOPROXY=off"
+  exit 1
+fi
+
+kube::golang::verify_go_version
+kube::util::require-jq
+
+dep="${1:-}"
+sha="${2:-}"
+if [[ -z "${dep}" || -z "${sha}" ]]; then
+  echo "Usage:"
+  echo "  hack/pin-dependency.sh \$MODULE \$SHA-OR-TAG"
+  echo ""
+  echo "Example:"
+  echo "  hack/pin-dependency.sh github.com/docker/docker 501cb131a7b7"
+  echo ""
+  exit 1
+fi
+
+# Add the require directive
+echo "Running: go get ${dep}@${sha}"
+go get "${dep}@${sha}"
+
+# Find the resolved version
+rev=$(go mod edit -json | jq -r '.Require[] | select(.Path == "github.com/docker/docker") | .Version')
+echo "Resolved to ${dep}@${rev}"
+
+# Add the replace directive
+echo "Running: go mod edit -replace ${dep}=${dep}@${rev}"
+go mod edit -replace "${dep}=${dep}@${rev}"
+
+echo ""
+echo "Run hack/update-vendor.sh to rebuild the vendor directory"