Merge pull request #2320 from mbeddr/feature/automerge-workflow #1
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| name: PR to merge into the next version | |
| on: | |
| push: | |
| branches: | |
| - 'maintenance/*' | |
| jobs: | |
| create-pr: | |
| runs-on: ubuntu-latest | |
| steps: | |
| - shell: bash | |
| env: | |
| GH_TOKEN: ${{ github.token }} | |
| owner_and_repo: ${{ github.repository }} | |
| run: | | |
| echo "Calculating PR branches:" | |
| # Next branch matching refs/heads/maintenance/* pattern, or empty if we're on the last one | |
| next_maintenance_branch=$(gh api "/repos/$owner_and_repo/git/matching-refs/heads/maintenance/" \ | |
| --jq 'map(.ref | ltrimstr("refs/heads/") | select(. > "${{ github.ref_name }}")) | sort | min') | |
| echo " Next maintenance branch: ${next_maintenance_branch:-(none)}" | |
| # Substitute the default branch if empty | |
| default_branch=${{ github.event.repository.default_branch }} | |
| base_branch=${next_maintenance_branch:-$default_branch} | |
| echo " PR base branch: $base_branch" | |
| # Calculate PR head branch name (the branch to merge) by substituting 'maintenance' for 'merge' | |
| head_branch=${{ github.ref_name }} | |
| head_branch=${head_branch/#maintenance/merge} | |
| echo " PR head branch: $head_branch" | |
| echo "" | |
| echo "Pushing ${{ github.ref_name }} to $head_branch" | |
| # Create or update $head_branch | |
| gh api --silent --method=POST -f ref="refs/heads/$head_branch" -f sha=${{ github.sha }} "/repos/$owner_and_repo/git/refs" || | |
| gh api --silent --method=PATCH -f sha=${{ github.sha }} "/repos/$owner_and_repo/git/refs/heads/$head_branch" || | |
| (echo "Could not push ${{ github.ref_name }} (${{ github.sha }}) to $head_branch" 1>&2 ; exit 1) | |
| # Create PR if it does not exist yet | |
| existing_pr_url=$(gh pr list --repo $owner_and_repo --head $head_branch --base $base_branch --json url --jq 'map(.url[]).[]') | |
| if [[ $existing_pr_url ]] | |
| then | |
| echo "Pull request $head_branch -> $base_branch already exists at $existing_pr_url" | |
| else | |
| echo "Creating a new pull request $head_branch -> $base_branch" | |
| gh pr create --repo $owner_and_repo --head $head_branch --base $base_branch \ | |
| --title "Merge ${{ github.ref_name }} into $base_branch" \ | |
| --body "This is an automatic PR which merges changes from \`${{ github.ref_name }}\` to \`$base_branch\`." \ | |
| --assignee '${{ github.actor }}' \ | |
| --reviewer '${{ github.actor }}' | |
| fi |