Cherry-pick commits from #146 #158
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| name: cherry-pick | |
| on: | |
| issue_comment: | |
| types: [created] | |
| jobs: | |
| process_comment: | |
| # This job will parse the cherry-pick command and perform several sanity checks. | |
| # Ideally we want all pull requests opened from a given command to be correct and successfull, so that | |
| # developers don't have to reissue a cherry-pick command for a subset of the commits/branches. | |
| # Therefore, we do all possible sanity checks in this job, before any pull request is opened in subsequent jobs. | |
| if: github.event.issue.pull_request != '' && contains(github.event.comment.body, '!cherry-pick') | |
| runs-on: ubuntu-latest | |
| permissions: | |
| contents: write | |
| pull-requests: write | |
| outputs: | |
| commits: ${{ steps.command.outputs.commits }} | |
| branches: ${{ steps.command.outputs.branches }} | |
| branch_matrix: ${{ steps.command.outputs.branch_matrix }} | |
| status: ${{ steps.report.outputs.status }} | |
| steps: | |
| - name: Checkout repository | |
| uses: actions/checkout@v4 | |
| with: | |
| # We need the history of all branches for the sanity checks | |
| fetch-depth: 0 | |
| - name: Parse Command | |
| # Parse a command of the form: | |
| # | |
| # cherry-pick <hash_1> <hash_2> ... <hash_n> into <branch_1> <branch_2> ... <branch_n> | |
| # | |
| # and generate lists of commits and branches for further processing. | |
| # | |
| # TODO: make this step into a separate job, so that we can handle more than one command per comment | |
| id: command | |
| shell: bash | |
| run: | | |
| set -f | |
| command_string=$(echo "${{ github.event.comment.body }}" | grep -m 1 cherry-pick) | |
| echo "command=$command_string" >> $GITHUB_OUTPUT | |
| command=($command_string) | |
| command=("${command[@]:1}") | |
| has_separator=false | |
| arg_type=hash | |
| commits=() | |
| branches=() | |
| for token in ${command[@]}; do | |
| if [[ "$token" == "into" ]]; then | |
| arg_type=branch | |
| has_separator=true | |
| else | |
| if [[ "$arg_type" == "hash" ]]; then | |
| commits+=( $token ) | |
| elif [[ "$arg_type" == "branch" ]]; then | |
| branches+=( $token ) | |
| fi | |
| fi | |
| done | |
| # Check command correctness | |
| if [[ "$has_separator" = false ]]; then | |
| errors=" | |
| - the command is missing the \\\`into\\\` separator." | |
| else | |
| if [[ -z "$commits" ]]; then | |
| errors+=" | |
| - no list of commits to cherry-pick was provided" | |
| fi | |
| if [[ -z "$branches" ]]; then | |
| errors+=" | |
| - no list of target branches was provided" | |
| fi | |
| fi | |
| if [[ -n "$errors" ]]; then | |
| errors="Incorrect cherry-pick command:$errors" | |
| printf "ERROR_MSG<<EOF\n%s\nEOF" "$errors" >> $GITHUB_ENV | |
| else | |
| # Output lists of commits and branches | |
| echo "commits=${commits[@]}" >> $GITHUB_OUTPUT | |
| echo "branches=${branches[@]}" >> $GITHUB_OUTPUT | |
| # We also output the list of branches as json, so they can be used to generate a matrix for the next job | |
| echo "branch_matrix=$(jq -cn '$ARGS.positional' --args -- "${branches[@]}")" >> $GITHUB_OUTPUT | |
| fi | |
| - name: Check PR Status | |
| if: env.ERROR_MSG == '' | |
| run: | | |
| # Check if the PR has been merged | |
| if [[ -z "${{ github.event.issue.pull_request.merged_at }}" ]]; then | |
| echo "ERROR_MSG=Pull request has not been merged yet. Cannot cherry-pick commits." >> $GITHUB_ENV | |
| fi | |
| - name: Check commits | |
| if: env.ERROR_MSG == '' | |
| env: | |
| GH_TOKEN: ${{ github.token }} | |
| run: | | |
| # Check that the commits to cherry-pick are actually part of this PRs target branch | |
| target=$(gh api repos/{owner}/{repo}/pulls/${{ github.event.issue.number }} -q .base.ref) | |
| for commit in ${{ steps.command.outputs.commits }}; do | |
| if git merge-base --is-ancestor ${commit} origin/$target; then | |
| echo "Commit $commit found in $target branch." | |
| else | |
| missing_commits+=" \\\`$commit\\\`" | |
| fi | |
| done | |
| if [[ -n "$missing_commits" ]]; then | |
| echo "ERROR_MSG=Could not find commit(s) $missing_commits in [$target](${{ github.repositoryUrl }}/tree/$target)." >> $GITHUB_ENV | |
| fi | |
| - name: Check Target Branches | |
| if: env.ERROR_MSG == '' | |
| run: | | |
| # Check that cherry-pick target branches actually exist | |
| for branch in ${{ steps.command.outputs.branches }}; do | |
| if [[ -n "$(git ls-remote --heads origin ${branch})" ]]; then | |
| echo "Found branch $branch in repository." | |
| else | |
| missing_branches+=" \\\`$branch\\\`" | |
| fi | |
| done | |
| if [[ -n "$missing_branches" ]]; then | |
| echo "ERROR_MSG=Could not find branch(es) $missing_branches in repository." >> $GITHUB_ENV | |
| fi | |
| - name: Check Previous Cherry-picks | |
| if: env.ERROR_MSG == '' | |
| run: | | |
| # Check that branches with the cherry-picked commits have not been pushed to the remote yet | |
| for branch in ${{ steps.command.outputs.branches }}; do | |
| new_branch=cherry_pick_from_pr${{ github.event.issue.number }}_into_$branch | |
| if [[ -z "$(git ls-remote --heads origin $new_branch)" ]]; then | |
| echo "No previous attempt to cherry-pick commits from this PR into branch $branch found." | |
| else | |
| duplicated_branches+=" $branch" | |
| fi | |
| done | |
| if [[ -n "$duplicated_branches" ]]; then | |
| errors="It seems there are previous unfinished attempts to cherry-pick commits from this PR to the following branch(es):" | |
| for branch in $duplicated_branches; do | |
| errors+=" | |
| - [$branch](https://${{ github.repository }}/tree/$branch)" | |
| done | |
| errors+=" | |
| If the current cherry-pick attempt is for a different set of commits, make sure that the previous attempts are fully merged and that the corresponding branches have been deleted." | |
| printf "ERROR_MSG<<EOF\n%s\nEOF" "$errors" >> $GITHUB_ENV | |
| fi | |
| - name: Status Report | |
| id: report | |
| env: | |
| GH_TOKEN: ${{ github.token }} | |
| run: | | |
| if [[ -n '${{ env.ERROR_MSG }}' ]]; then | |
| body="> ${{ steps.command.outputs.command }} | |
| Automatic cherry-pick failed. ${{ env.ERROR_MSG }}" | |
| gh pr comment ${{ github.event.issue.number }} --body "$body" | |
| echo "status=failure" >> $GITHUB_OUTPUT | |
| else | |
| echo "status=success" >> $GITHUB_OUTPUT | |
| fi | |
| create_pr: | |
| runs-on: ubuntu-latest | |
| needs: process_comment | |
| if: needs.process_comment.outputs.status == 'success' | |
| permissions: | |
| contents: write | |
| pull-requests: write | |
| strategy: | |
| matrix: | |
| branch: ${{ fromJson(needs.process_comment.outputs.branch_matrix) }} | |
| steps: | |
| - name: Checkout repository | |
| uses: actions/checkout@v4 | |
| with: | |
| # We need the history of all branches | |
| fetch-depth: 0 | |
| - name: Determine branch information | |
| id: info | |
| run: | | |
| echo "new_branch=cherry_pick_from_pr${{ github.event.issue.number }}_into_${{ matrix.branch }}" >> $GITHUB_OUTPUT | |
| echo "target_branch_url=[${{ matrix.branch }}](https://github.com/${{ github.repository }}/tree/${{ matrix.branch }})" >> $GITHUB_OUTPUT | |
| - name: Cherry-pick commits | |
| id: cherry-pick | |
| continue-on-error: true | |
| run: | | |
| # We use the github-actions bot account for creating the commits. Note that this will not work if the repository requires signed commits. | |
| git config user.name "github-actions[bot]" | |
| git config user.email "41898282+github-actions[bot]@users.noreply.github.com" | |
| git checkout -b ${{ steps.info.outputs.new_branch }} origin/${{ matrix.branch }} | |
| git cherry-pick ${{ needs.process_comment.outputs.commits }} | |
| - name: Open pull request | |
| if: steps.cherry-pick.outcome == 'success' | |
| id: open_pr | |
| env: | |
| GH_TOKEN: ${{ github.token }} | |
| run: | | |
| git push --set-upstream origin ${{ steps.info.outputs.new_branch }} | |
| url=$(gh pr create -B ${{ matrix.branch }} -t "Cherry-pick commits from #${{ github.event.issue.number }}" \ | |
| -b "Cherry-picking commit(s) ${{ needs.process_comment.outputs.commits }} from #${{ github.event.issue.number }} into ${{ steps.info.outputs.target_branch_url }}.") | |
| echo "pr_url=$url" >> $GITHUB_OUTPUT | |
| - name: Report success | |
| if: steps.cherry-pick.outcome == 'success' | |
| shell: bash | |
| env: | |
| GH_TOKEN: ${{ github.token }} | |
| BODY: | | |
| Automatic Git cherry-picking of commit(s) ${{ needs.process_comment.outputs.commits }} into ${{ steps.info.outputs.target_branch_url }} was successful. | |
| The new pull request can be reviewed and approved [here](${{ steps.open_pr.outputs.pr_url }}). | |
| run: | | |
| gh pr comment ${{ github.event.issue.number }} --body '${{ env.BODY }}' | |
| - name: Manual cherry-pick instructions | |
| if: steps.cherry-pick.outcome == 'failure' | |
| shell: bash | |
| env: | |
| GH_TOKEN: ${{ github.token }} | |
| BODY: | | |
| Automatic Git cherry-picking of commit(s) ${{ needs.process_comment.outputs.commits }} into ${{ steps.info.outputs.target_branch_url }} failed. This usually happens when cherry-picking results in a conflic or an empty commit. To manually cherry-pick the commits and open a pull request, please follow these instructions: | |
| 1. Create new branch from target branch: | |
| ```console | |
| git checkout ${{ matrix.branch }} | |
| git pull | |
| git checkout -b ${{ steps.info.outputs.new_branch }} | |
| ``` | |
| 2. Cherry-pick commits: | |
| ```console | |
| git cherry-pick ${{ needs.process_comment.outputs.commits }} | |
| ``` | |
| 3. Fix any conflicts and/or empty commits by following the instructions provided by Git. | |
| 4. Push the new branch: | |
| ```console | |
| git push --set-upstream origin ${{ steps.info.outputs.new_branch }} | |
| ``` | |
| 5. Open a new pull request on github making sure the target branch is set to ${{ matrix.branch }}. | |
| run: | | |
| gh pr comment ${{ github.event.issue.number }} --body '${{ env.BODY }}' |