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cherry-pick-to.yml
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name: Cherry-pick-to-branch
on:
push:
branches: [ "master" ]
env:
cherry_pick_label_prefix: "cherry-pick-to-"
cherry_pick_pr_success_label: "Auto cherry-pick success ✅"
cherry_pick_pr_failure_label: "Auto cherry-pick failure ⚠️"
use_draft_pr: "true"
jobs:
cherry-pick-from-push:
strategy:
matrix:
target-branch: [ "support/v5.12", "support/v5.13" ]
runs-on: ubuntu-latest
steps:
- name: Setup Variables
id: setup
run: |
echo continue_workflow=true >> $GITHUB_ENV
short_sha=$(echo ${{ github.event.after }} | cut -c1-7)
echo cherry_pick_branch=cherry-pick/$short_sha/${{matrix.target-branch}} >> $GITHUB_ENV
- name: Checkout
uses: actions/checkout@v4
with:
fetch-depth: 0
- name: Determine PR number (if any)
id: pr
run: |
pr_number=$(gh pr list --search ${{ github.event.after }} --state merged --json number --jq '.[0].number')
echo "PR number: $pr_number"
echo pr_number=$pr_number >> $GITHUB_OUTPUT
# Set the continue workflow to false, if the pr_number is empty
if [ -z "$pr_number" ]; then
echo continue_workflow=false >> $GITHUB_ENV
fi
env:
GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
- name: Check for a cherry pick label and save whether that is the case
if: ${{ env.continue_workflow == 'true' }}
run: |
# List all labels for the PR number from the last step
labels=$(gh pr view ${{ steps.pr.outputs.pr_number }} --json labels --jq '.labels[].name')
echo "Labels: $labels"
# Check if the list contains the special cherry pick label
if [[ $labels == *"${{ env.cherry_pick_label_prefix }}${{matrix.target-branch}}"* ]]; then
echo "Cherry pick label found"
echo continue_workflow=true >> $GITHUB_ENV
else
echo "Cherry pick label not found"
echo continue_workflow=false >> $GITHUB_ENV
fi
env:
GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
- name: Create new branch for cherry picking
if: ${{ env.continue_workflow == 'true' }}
run: |
# Set the git config to the pr_author and pr_author_email
git config user.name '${{ github.event.pusher.name }}'
git config user.email '${{ github.event.pusher.email }}'
git checkout ${{ matrix.target-branch }}
git checkout -b ${{ env.cherry_pick_branch }}
env:
GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
- name: Cherry pick the commit between the before (exclusive) and after (inclusive) commits
id: cherry-pick
if: ${{ env.continue_workflow == 'true' }}
run: |
git cherry-pick ${{ github.event.before }}..${{ github.event.after }}
env:
GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
continue-on-error: true
- name: Create PR description
if: ${{ env.continue_workflow == 'true' }}
id: pr-description
run: |
# Determine original PR title
original_pr_title=$(gh pr view ${{ steps.pr.outputs.pr_number }} --json title --jq '.title')
# Create a title for the new PR
echo pr_title="[CP #${{ steps.pr.outputs.pr_number }} > ${{ matrix.target-branch }}] $original_pr_title" >> $GITHUB_OUTPUT
if [ "${{ steps.cherry-pick.outcome }}" == "success" ]; then
echo pr_label="${{ env.cherry_pick_pr_success_label }}" >> $GITHUB_OUTPUT
echo pr_draft_command="" >> $GITHUB_OUTPUT
# Create multiline pr_description
echo "pr_description<<EOF" >> $GITHUB_OUTPUT
echo "# Cherry-pick" >> $GITHUB_OUTPUT
echo "Cherry-picked PR #${{ steps.pr.outputs.pr_number }} to branch \`${{ matrix.target-branch }}\`." >> $GITHUB_OUTPUT
echo "The cherry-pick was **successfull**." >> $GITHUB_OUTPUT
echo "" >> $GITHUB_OUTPUT
echo "Please review the changes and **rebase-merge** if desired." >> $GITHUB_OUTPUT
echo "EOF" >> $GITHUB_OUTPUT
else
echo pr_label="${{ env.cherry_pick_pr_failure_label }}" >> $GITHUB_OUTPUT
# Only set the pr_draft_command if the use_draft_pr is true. Otherwise, set it to an empty string.
# Some repos (like personal ones) might not have the draft PR feature enabled.
if [ "${{ env.use_draft_pr }}" == "true" ]; then
echo pr_draft_command="--draft" >> $GITHUB_OUTPUT
else
echo pr_draft_command="" >> $GITHUB_OUTPUT
fi
# Create multiline pr_description
echo "pr_description<<EOF" >> $GITHUB_OUTPUT
echo "# Cherry-pick failed" >> $GITHUB_OUTPUT
echo "Cherry-picked PR #${{ steps.pr.outputs.pr_number }} to branch \`${{ matrix.target-branch }}\`." >> $GITHUB_OUTPUT
echo "The cherry-pick has **failed**" >> $GITHUB_OUTPUT
echo "" >> $GITHUB_OUTPUT
echo "The following files have caused conflicts:" >> $GITHUB_OUTPUT
echo "" >> $GITHUB_OUTPUT
echo "\`\`\`bash" >> $GITHUB_OUTPUT
git diff --name-only --diff-filter=U >> $GITHUB_OUTPUT
echo "\`\`\`" >> $GITHUB_OUTPUT
echo "" >> $GITHUB_OUTPUT
echo "## Resolving" >> $GITHUB_OUTPUT
echo "Please resolve conflicts manually. You can use this PR and branch to your convenience." >> $GITHUB_OUTPUT
echo "" >> $GITHUB_OUTPUT
echo "\`\`\`bash" >> $GITHUB_OUTPUT
echo "git fetch origin" >> $GITHUB_OUTPUT
echo "git checkout -b local/${{ env.cherry_pick_branch }} origin/${{ matrix.target-branch }}" >> $GITHUB_OUTPUT
echo "git branch -u origin/${{ env.cherry_pick_branch }}" >> $GITHUB_OUTPUT
echo "git cherry-pick ${{ github.event.before }}..${{ github.event.after }}" >> $GITHUB_OUTPUT
echo "" >> $GITHUB_OUTPUT
echo "# Resolve conflicts and use" >> $GITHUB_OUTPUT
echo "# git cherry-pick --continue" >> $GITHUB_OUTPUT
echo "# until all conflicts are resolved." >> $GITHUB_OUTPUT
echo "" >> $GITHUB_OUTPUT
echo "git push -f origin HEAD:${{ env.cherry_pick_branch }}" >> $GITHUB_OUTPUT
echo "\`\`\`" >> $GITHUB_OUTPUT
echo "" >> $GITHUB_OUTPUT
echo "After resolving all conflicts, **rebase-merge** this PR." >> $GITHUB_OUTPUT
echo "EOF" >> $GITHUB_OUTPUT
fi
env:
GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
# If the cherry-pick fails, abort the cherry-pick and create an empty commit on it.
- name: Abort cherry-pick if it failed and add empty commit for PR creation
if: ${{ env.continue_workflow == 'true' && steps.cherry-pick.outcome == 'failure' }}
run: |
git cherry-pick --abort
# Use the bot user for the commit
git config user.name 'github-actions[bot]'
git config user.email '41898282+github-actions[bot]@users.noreply.github.com'
# Create an empty commit
git commit --allow-empty -m "Cherry-pick failed"
git log --oneline -n 5
env:
GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
- name: Push the cherry-pick branch
if: ${{ env.continue_workflow == 'true' }}
run: git push origin ${{ env.cherry_pick_branch }}
env:
GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
- name: create pull request
if: ${{ env.continue_workflow == 'true' }}
run: |
# Check if the label exists in the repository. If not, create it.
gh label list | grep -q "${{ steps.pr-description.outputs.pr_label }}" || gh label create "${{ steps.pr-description.outputs.pr_label }}"
# Create the pull request
gh pr create -B '${{ matrix.target-branch }}' \
-H '${{ env.cherry_pick_branch }}' \
--title '${{ steps.pr-description.outputs.pr_title }}' \
--body '${{ steps.pr-description.outputs.pr_description }}' \
--label '${{ steps.pr-description.outputs.pr_label }}' \
${{ steps.pr-description.outputs.pr_draft_command }}
env:
GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}