Add release scripts for modules and binaries

releasing/releasemodule.sh

@@ -0,0 +1,104 @@
+#!/bin/bash
+# Copyright 2019 The Kubernetes Authors.
+# SPDX-License-Identifier: Apache-2.0
+
+# run this script with releasing/releasemodule.sh MODULE
+#   -- e.g. releasing/releasemodule.sh cmd/config
+# to push the latest tag to release a binary, run with BINARY=true
+#   -- e.g. BINARY=true releasing/releasemodule.sh kustomize
+# to skip fetch from upstream, run with FETCH=false
+#   -- e.g. FETCH=false releasing/releasemodule.sh kyaml
+# for a list of modules see releasing/releaseallmodules.sh
+set -e
+
+# perform release for a module
+function releaseModule {
+  # calculate the branch and tag names
+  module=$1
+  slash="/"
+  module_name=${module/$slash/_}
+  name="${module_name}_major"
+  major="${!name}"
+  name="${module_name}_minor"
+  minor="${!name}"
+  name="${module_name}_patch"
+  patch="${!name}"
+  branch="release-${module}-v${major}.${minor}"
+  tag="${module}/v${major}.${minor}.${patch}"
+
+  # create a temporary workspace for our work
+  wktree=$(mktemp -d /tmp/kustomize-releases-XXXXXX)
+  git branch -f $branch upstream/master # always release from master
+  git worktree add $wktree $branch # create a separate worktree for the branch
+  pushd .
+  cd $wktree/$module # cd into the worktree/module
+
+  echo "dir:    $wktree"
+  echo "module: $module v$major.$minor.$patch"
+  echo "branch: $branch"
+  echo "tag:    $tag"
+
+  # clean up replaces in go.mod as needed
+  FILE=fixgomod.sh
+  if test -f "$FILE"; then
+    ./fixgomod.sh
+
+    go mod tidy
+    go test ./...
+    go mod tidy
+    git add .
+    git commit -m "update go.mod for release" || echo "no changes made to go.mod"
+  fi
+
+  if [ "$NO_DRY_RUN" == "true" ]; then
+     git push upstream $branch
+     git tag -a $tag -m "Release $tag on branch $branch"
+     git push upstream $tag
+  else
+    printf "\nSkipping push binary $binary -- run with NO_DRY_RUN=true to push the release.\n\n"
+  fi
+
+  # cleanup release artifacts
+  popd
+  rm -rf $wktree
+  git worktree prune
+  git branch -D $branch
+  echo "$module complete"
+}
+
+function releaseBinary {
+  # move the latest tag for the binary to trigger cloudbuild
+  binary=$1
+  echo "binary: $binary"
+
+  if [ "$NO_DRY_RUN" == "true" ]; then
+    git tag -d latest_$binary
+    git push upstream :latest_$binary
+    git tag -a latest_$binary
+    git push upstream latest_$binary
+  else
+      echo "Skipping push binary $binary -- run with NO_DRY_RUN=true to push the release."
+  fi
+}
+
+# configure the branch and tag names
+module="${1?must provide the module to release as an argument}"
+
+# get the release versions
+source releasing/VERSIONS
+
+FETCH=${FETCH:-"true"}
+NO_DRY_RUN=${NO_DRY_RUN:-"false"}
+
+# get the most recent changes
+if [ "$FETCH" == "true" ]; then
+  git fetch upstream
+fi
+
+# release the module
+releaseModule $module
+
+# release the binary
+if [ "$BINARY" == "true" ]; then
+  releaseBinary $module
+fi