update_pull_request_for_release.yml

name: 'Update pull request for release'
on:
  pull_request:
    types:
      - opened
      - reopened
      - edited
      - synchronize
jobs:
  update_pull_requests:
    if: contains(github.event.pull_request.labels.*.name, 'Release')
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2
        with:
          fetch-depth: 0
      - name: 'Get latest name'
        uses: pozetroninc/github-action-get-latest-release@master
        id: get-latest
        continue-on-error: true
        with:
          repository: ${{ github.repository }}
          excludes: 'prerelease, draft'
      - name: Check first release
        id: check-latest
        run: |
          if [ -n "${{ steps.get-latest.outputs.release }}" ];then
            echo "::set-output name=version::${{ steps.get-latest.outputs.release }}";
            echo "::set-output name=from::${{ steps.get-latest.outputs.release }}";
            echo "::set-output name=skip::false";
          else
            echo "::set-output name=version::1.0.0";
            echo "::set-output name=from::4b825dc642cb6eb9a060e54bf8d69288fbee4904";
            echo "::set-output name=skip::true";
          fi
      - name: 'Generate changelog'
        uses: 'slime-hatena/lerna-changelog-action@main'
        id: changelog
        with:
          GITHUB_AUTH: '${{ secrets.GITHUB_TOKEN }}'
          tag_from: '${{ steps.check-latest.outputs.from }}'
          tag_to: 'origin/develop'
      - name: Judge the next version
        id: judge-next-version
        run: |
          echo "::set-output name=major::false";
          echo "::set-output name=minor::false";
          echo "::set-output name=patch::false";
          if [ "${{ steps.check-latest.outputs.skip }}" = "false" ]; then
            if [ -n "`echo "${{ steps.changelog.outputs.markdown }}" | grep 'Breaking Change';`" ] ; then
              echo "::set-output name=major::true";
            elif [ -n "`echo "${{ steps.changelog.outputs.markdown }}" | grep 'Feature'`" ] ; then
              echo "::set-output name=minor::true";
            else
              echo "::set-output name=patch::true";
            fi
          fi
      - name: 'Calc next version'
        uses: 'slime-hatena/semantic-versioning-calculator-action@main'
        id: calc
        with:
          version: '${{ steps.check-latest.outputs.version }}'
          increment_major: '${{ steps.judge-next-version.outputs.major }}'
          increment_minor: '${{ steps.judge-next-version.outputs.minor }}'
          increment_patch: '${{ steps.judge-next-version.outputs.patch }}'
      - name: 'Create tag test'
        run: |
          git tag ${{ steps.calc.outputs.version }}
          git tag -d ${{ steps.calc.outputs.version }}
      - name: 'Update pull requests'
        uses: riskledger/update-pr-description@v2
        with:
          body: "This is a pull request for the next release.\nIf you approve it, the release will be created.\nPlease merge your changes into this branch.\n\n**Do not attach anything other than a release tag to this request.\nUnexpected versions and content may be released.**\n\n### Next version\n\nNext version: `${{ steps.calc.outputs.version }}`\nAutomatically set based on the contents of the release notes.\n\n### Release note\n\nGenerated range: `${{ steps.check-latest.outputs.from }}...origin/develop`\n\n```md\n${{steps.changelog.outputs.markdown}}\n```"
          token: ${{ secrets.GITHUB_TOKEN }}