merge-from-upstream-tip.yml

name: "Merge Latest Tag from Tip"
on:
  schedule:
    - cron: '0 14 * * 4'
  workflow_dispatch:
jobs:
  # To create personal access tokens, go to account settings,
  # then developer settings. Create a legacy token, give it
  # access to repos and workflows and other sensible things.
  # To then create a secret for the workflow, go to the
  # repository settings and create a new secret with the text
  # of the access token.
  merge-from-tip:
    # We only want this to run in one repo
    # if: github.repository == 'openjdk/shenandoah'
    runs-on: ubuntu-latest
    name: Merge latest tag
    steps:
      # Note that we are checking out the upstream fork here.
      # If this automation runs in openjdk/shenandoah, remove
      # the token and repository arguments.
      - name: Checkout code
        uses: actions/checkout@v3
        with:
          fetch-depth: 0
          token: ${{ secrets.WORKFLOWS }}
          repository: openjdk/shenandoah-jdk21u
      - name: Fetch latest tag
        id: latest-tag
        run: |
          git remote add upstream https://github.com/openjdk/jdk21u-dev.git
          git fetch upstream
          echo "latest=$(git tag --list --sort=-creatordate | head -1)" >> "$GITHUB_OUTPUT"
      - name: Reset the default branch with latest tag
        run: |
          git reset --hard ${{ steps.latest-tag.outputs.latest }}
      - name: Create Pull Request
        uses: peter-evans/create-pull-request@v5
        with:
          commit-message: Merge tag ${{ steps.latest-tag.outputs.latest }}
          # Using the legacy personal access token seems to be
          # required to create a pull request on a remote repo.
          # We can revert this to a fine grained token when this
          # workflow is running upstream.
          token: ${{ secrets.PAT }}
          branch: merge-${{ steps.latest-tag.outputs.latest }}
          delete-branch: true
          # Without this, this action will attempt to push the
          # new branch to the remote fork (i.e. openjdk/shenandoah).
          # When this workflow runs in that repo, we can remove this.
          push-to-fork: ${{ github.repository }}
          title: Merge openjdk/jdk21u-dev:master
          body: Merges tag ${{ steps.latest-tag.outputs.latest }}