pr-labeler.yml

# This action adds changelog labels to PRs that are then used by the release
# notes generator in Craft. The configuration for which labels map to what
# changelog categories can be found in .github/release.yml.

name: Label PR for Changelog

on:
  pull_request:
    types: [opened, edited]

permissions:
  pull-requests: write

jobs:
  label:
    runs-on: ubuntu-latest
    steps:
      - name: Add changelog label
        uses: actions/github-script@v7
        with:
          script: |
            const title = context.payload.pull_request.title.toLowerCase();
            const prNumber = context.payload.pull_request.number;

            // Get current labels
            const { data: currentLabels } = await github.rest.issues.listLabelsOnIssue({
              owner: context.repo.owner,
              repo: context.repo.repo,
              issue_number: prNumber,
            });

            // Check if a Changelog label already exists
            const hasChangelogLabel = currentLabels.some(label =>
              label.name.startsWith('Changelog:') || label.name === 'skip-changelog'
            );

            if (hasChangelogLabel) {
              console.log('PR already has a Changelog label, skipping');
              return;
            }

            // Determine which label to apply
            let newLabel = null;

            if (title.includes('deprecate')) {
              newLabel = 'Changelog: Deprecation';
            } else if (title.startsWith('feat')) {
              newLabel = 'Changelog: Feature';
            } else if (title.startsWith('fix') || title.startsWith('bugfix')) {
              newLabel = 'Changelog: Bugfix';
            } else if (title.startsWith('docs')) {
              newLabel = 'Changelog: Docs';
            } else if (title.startsWith('ref') || title.startsWith('test')) {
              newLabel = 'Changelog: Internal';
            } else if (title.startsWith('ci') || title.startsWith('build')) {
              newLabel = 'skip-changelog';
            }

            // Apply the new label if one was determined
            if (newLabel) {
              await github.rest.issues.addLabels({
                owner: context.repo.owner,
                repo: context.repo.repo,
                issue_number: prNumber,
                labels: [newLabel],
              });

              console.log(`Applied label: ${newLabel}`);
            } else {
              console.log('No matching label pattern found in PR title, please add manually');
            }