changelog.yml

name: update changelog

on:
  release:
    types: [released]
  workflow_call:
    secrets: 
      GPG_BOT:
        required: true
        description: bot gpg token
      GPG_PASSPHRASE:
        required: true
        description: bot gpg passphrase
      GPG_FINGERPRINT:
        required: true
        description: bot gpg fingerprint
      BOT_TOKEN:
        required: true
        description: bot token

jobs:
  changelog:
    runs-on: ubuntu-latest

    steps:
      - name: Checkout code
        uses: actions/checkout@v4
        with:
          fetch-depth: 0
          ref: ${{ github.event.release.target_commitish }}

      - name: Check file existence
        id: check_files
        uses: andstor/file-existence-action@v2
        with:
          files: "changelog.md"

      - uses: actions/setup-go@v5
        id: artifacts-golang
        with:
          go-version: '>=1.21.0'

      - name: Install first-changelog
        id: artifacts-tools-install
        if: steps.check_files.outputs.files_exists != 'true'
        run: go install github.com/bavix/first-changelog@latest

      - name: Install ghmd
        run: go install github.com/bavix/ghmd@latest

      - name: Init changelog
        id: artifacts-display-all
        if: steps.check_files.outputs.files_exists != 'true'
        run: |
          ~/go/bin/first-changelog "${{ github.repository }}" > changelog.md

      - name: Fix changelog
        run: cat changelog.md | ~/go/bin/ghmd | tee changelog.md

      - name: Import GPG key
        uses: crazy-max/ghaction-import-gpg@v6
        with:
          gpg_private_key: ${{ secrets.GPG_BOT }}
          passphrase: ${{ secrets.GPG_PASSPHRASE }}
          fingerprint: ${{ secrets.GPG_FINGERPRINT }}
          git_config_global: true
          git_user_signingkey: true
          git_commit_gpgsign: true
          git_committer_name: Github bot
          git_committer_email: bot@babichev.net

      - name: Check if branch and release match
        if: ${{ steps.check_files.outputs.files_exists == 'true' && github.event.release.target_commitish != 'main' && github.event.release.target_commitish != 'master' && github.event.release.target_commitish != 'latest' }}
        id: guard
        run: |
          NUMERIC_VERSION="${RELEASE_TAG_NAME#v}"
          MAJOR_VERSION="${NUMERIC_VERSION%%.*}"
          BRANCH_MAJOR_VERSION="${BRANCH%%.*}"

          echo "MAJOR_VERSION=$(echo $MAJOR_VERSION)" >> $GITHUB_OUTPUT;
          echo "BRANCH_MAJOR_VERSION=$(echo $BRANCH_MAJOR_VERSION)" >> $GITHUB_OUTPUT;

          if [ "$MAJOR_VERSION" != "$BRANCH_MAJOR_VERSION" ]; then
            echo "Mismatched versions! Aborting."
            VERSION_MISMATCH='true';
          else
            echo "Versions match! Proceeding."
            VERSION_MISMATCH='false';
          fi
          echo "VERSION_MISMATCH=$(echo $VERSION_MISMATCH)" >> $GITHUB_OUTPUT;
        env:
          BRANCH: ${{ github.event.release.target_commitish }}
          RELEASE_TAG_NAME: ${{ github.event.release.tag_name }}

      - name: Fail if branch and release tag do not match
        if: ${{ steps.check_files.outputs.files_exists == 'true' && steps.guard.outputs.VERSION_MISMATCH == 'true' }}
        uses: actions/github-script@v7
        with:
          script: |
              core.setFailed('Workflow failed. Release version does not match with selected target branch. Changelog not updated automatically.')

      - name: Extract release date from git tag
        id: release_date
        if: steps.check_files.outputs.files_exists == 'true'
        run: |
          # Get UNIX timestamp from git-tag
          TIMESTAMP_OF_RELEASE_COMMIT=$(git log -1 --date=unix --format=%ad '${{ github.event.release.tag_name }}');

          # Convert timestamp to UTC date in Y-m-d format
          FORMATED_DATE=$(date -u -d @$TIMESTAMP_OF_RELEASE_COMMIT +%Y-%m-%d)

          # Make date available to other steps
          echo "date=$(echo $FORMATED_DATE)" >> $GITHUB_OUTPUT;

      - name: Update changelog.md
        uses: stefanzweifel/changelog-updater-action@v1
        if: steps.check_files.outputs.files_exists == 'true'
        with:
          release-date: ${{ steps.release_date.outputs.date }}
          release-notes: ${{ github.event.release.body }}
          latest-version: ${{ github.event.release.tag_name }}
          compare-url-target-revision: ${{ github.event.release.target_commitish }}
          parse-github-usernames: true
          path-to-changelog: changelog.md

      - name: Commit updated changelog.md
        uses: stefanzweifel/git-auto-commit-action@v5
        with:
          branch: ${{ github.event.release.target_commitish }}
          commit_message: Update changelog.md
          file_pattern: changelog.md
          commit_user_name: Github bot
          commit_user_email: bot@babichev.net
          commit_author: Github bot <bot@babichev.net>
          commit_options: '-S'