ci: announce releases in Comms (#37)

Co-authored-by: Henning Muszynski <henningmu@users.noreply.github.com>

Author: henningmu

.github/workflows/release.yml

@@ -26,7 +26,7 @@ jobs:
     release:
         name: Release
         runs-on: ubuntu-latest
-        timeout-minutes: 30
+        timeout-minutes: 60
 
         steps:
             - name: Generate bot token
@@ -52,13 +52,13 @@ jobs:
                   GH_TOKEN: ${{ steps.generate_token.outputs.token }}
 
             - name: Checkout repository
-              uses: actions/checkout@v4
+              uses: actions/checkout@v6
               with:
                   token: ${{ steps.generate_token.outputs.token }}
                   fetch-depth: 0
 
             - name: Setup Node.js
-              uses: actions/setup-node@v4
+              uses: actions/setup-node@v6
               with:
                   node-version: '22'
                   cache: npm
@@ -68,6 +68,11 @@ jobs:
             - name: Install dependencies
               run: npm ci
 
+            - name: Capture previous tag
+              if: github.ref_name == 'main'
+              id: previous_tag
+              run: echo "tag=$(git describe --tags --abbrev=0 --exclude='*-*' 2>/dev/null || true)" >> "$GITHUB_OUTPUT"
+
             - name: Release
               run: npx semantic-release
               env:
@@ -76,3 +81,62 @@ jobs:
                   GIT_AUTHOR_EMAIL: ${{ steps.bot_user.outputs.id }}+${{ steps.generate_token.outputs.app-slug }}[bot]@users.noreply.github.com
                   GIT_COMMITTER_NAME: ${{ steps.generate_token.outputs.app-slug }}[bot]
                   GIT_COMMITTER_EMAIL: ${{ steps.bot_user.outputs.id }}+${{ steps.generate_token.outputs.app-slug }}[bot]@users.noreply.github.com
+
+            - name: Derive release announcement
+              if: github.ref_name == 'main'
+              id: announcement
+              env:
+                  PREVIOUS_TAG: ${{ steps.previous_tag.outputs.tag }}
+              run: |
+                  git fetch --force --tags origin
+
+                  new_tag="$(git describe --tags --abbrev=0 2>/dev/null || true)"
+                  if [ -z "${new_tag}" ] || [ "${new_tag}" = "${PREVIOUS_TAG}" ]; then
+                      echo "should_announce=false" >> "$GITHUB_OUTPUT"
+                      exit 0
+                  fi
+
+                  package_name="$(node -p "JSON.parse(require('fs').readFileSync('package.json', 'utf8')).name")"
+                  package_version="$(node -p "JSON.parse(require('fs').readFileSync('package.json', 'utf8')).version")"
+                  release_version="${new_tag#v}"
+
+                  package_url="https://www.npmjs.com/package/${package_name}/v/${package_version}"
+                  release_url="${GITHUB_SERVER_URL}/${GITHUB_REPOSITORY}/releases/tag/${new_tag}"
+                  repo_url="${GITHUB_SERVER_URL}/${GITHUB_REPOSITORY}"
+
+                  if [ -n "${PREVIOUS_TAG}" ]; then
+                      changelog="$(git log --no-merges --reverse --pretty='format:- %s (%H-%h)' "${PREVIOUS_TAG}..${new_tag}" | grep -v '^- chore(release): ' || true)"
+                  else
+                      changelog="$(git log --no-merges --reverse --pretty='format:- %s (%H-%h)' "${new_tag}" | grep -v '^- chore(release): ' || true)"
+                  fi
+
+                  if [ -z "${changelog}" ]; then
+                      changelog='- No additional commits listed.'
+                  else
+                      changelog="$(printf '%s\n' "${changelog}" | sed -E -e 's,\(([a-f0-9]+)-([a-f0-9]+)\),([`\2`]('"${repo_url}"'/commit/\1)),g' | sed -E -e 's,\(#([0-9]+)\),([#\1]('"${repo_url}"'/pull/\1)),g')"
+                  fi
+
+                  {
+                      echo "should_announce=true"
+                      echo "message<<EOF"
+                      echo "**Comms CLI ${new_tag} published 🚀**"
+                      echo
+                      printf '%s\n' "${changelog}"
+                      echo
+                      echo "[GitHub release](${release_url}) | [npm package](${package_url})"
+                      echo "EOF"
+                  } >> "$GITHUB_OUTPUT"
+
+            - name: Announce release in Comms
+              if: github.ref_name == 'main' && steps.announcement.outputs.should_announce == 'true'
+              uses: Doist/comms-actions/post-comment-action@main
+              with:
+                  comms-client-id: ${{ secrets.COMMS_CLIENT_ID }}
+                  comms-client-secret: ${{ secrets.COMMS_CLIENT_SECRET }}
+                  comms-username: ${{ secrets.COMMS_USERNAME }}
+                  comms-password: ${{ secrets.COMMS_PASSWORD }}
+                  workspace-id: 69
+                  thread-id: CZECS4Yebwx7c1c8hDRmB
+                  content: ${{ steps.announcement.outputs.message }}
+                  audience: channel
+              continue-on-error: true