release.yml

on: create

name: create-draft-release

env:
  # adapted from <https://gist.github.com/rverst/1f0b97da3cbeb7d93f4986df6e8e5695#file-check_semver-sh-L5>
  TAG_RE: '^(.+)-v(0|[1-9][0-9]*)\.(0|[1-9][0-9]*)\.(0|[1-9][0-9]*)(-((0|[1-9][0-9]*|[0-9]*[a-zA-Z-][0-9a-zA-Z-]*)(\.(0|[1-9][0-9]*|[0-9]*[a-zA-Z-][0-9a-zA-Z-]*))*))?(\+([0-9a-zA-Z-]+(\.[0-9a-zA-Z-]+)*))?$'
  PARSE_CHANGELOG_URL: "https://github.com/taiki-e/parse-changelog/releases/download/v0.4.5/parse-changelog-x86_64-unknown-linux-gnu.tar.gz"

jobs:
  release:
    if: ${{ github.ref_type == 'tag' }}
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - name: Parse version
        id: version
        # adapted from
        # <https://github.com/taiki-e/create-gh-release-action/blob/3d89f8d1ab8d63913861d1a4ec424395f1a60e67/main.sh#L28>
        run: |
          tag=$(echo "${{ github.ref }}" | rev | cut -d '/' -f 1 | rev)
          if [[ ! "${tag}" =~ $TAG_RE ]]; then
            echo "invalid tag format: '${tag}'"
            exit 1
          fi

          package="${BASH_REMATCH[1]}"
          prerelease="${BASH_REMATCH[5]}"

          echo ::set-output name=package::$package
          echo ::set-output name=version::${tag#"${package}-"}
          echo ::set-output name=prerelease::false
          echo ::set-output name=raw::$tag

          if [[ ${#prerelease} -ne 0 ]]; then
            echo ::set-output name=prerelease::true
          fi
      - name: Create draft release
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        # TODO see about using Docker image instead of downloading parse-changelog at runtime

        # code adapted from <https://github.com/taiki-e/create-gh-release-action/blob/3d89f8d1ab8d63913861d1a4ec424395f1a60e67/main.sh#L84>
        run: |
          package="${{ steps.version.outputs.package }}"
          version="${{ steps.version.outputs.version }}"
          curl -LsSf "$PARSE_CHANGELOG_URL" | tar xzf -
          notes=$(./parse-changelog packages/${package}/CHANGELOG.md "${version#v}")
          tag="${{ steps.version.outputs.raw }}"

          if gh release view "${tag}" &>/dev/null; then
            gh release delete "${tag}" -y
          fi

          if ${{ steps.version.outputs.prerelease }}; then
            prerelease="--prerelease"
          fi

          gh release create "${tag}" $prerelease --draft --title "${package} ${version}" --notes "${notes}"