ModularityKit.Mutator/.github/workflows/pr-automation.yml at main · ModularityKit/ModularityKit.Mutator · GitHub

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name: Pull Request Automation

on:
  pull_request_target:
    types: [ opened, edited, synchronize, reopened, ready_for_review, labeled, unlabeled ]

permissions:
  contents: read
  issues: write
  pull-requests: write

jobs:
  assign-author:
    if: github.event.action == 'opened' || github.event.action == 'ready_for_review'
    runs-on: ubuntu-latest

    steps:
      - name: Assign PR author
        uses: kentaro-m/auto-assign-action@v2.0.0
        with:
          repo-token: ${{ secrets.GITHUB_TOKEN }}
          configuration-path: .github/config/auto-assign.yml

  title-check:
    runs-on: ubuntu-latest

    steps:
      - name: Check PR title
        uses: thehanimo/pr-title-checker@v1.4.3
        with:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
          pass_on_octokit_error: false
          configuration_path: .github/config/pr-title-checker.json

  labeler:
    runs-on: ubuntu-latest

    steps:
      - name: Label changed files
        uses: actions/labeler@v6
        with:
          configuration-path: .github/config/labeler.yml
          sync-labels: true

  performance-labeler:
    runs-on: ubuntu-latest

    steps:
      - name: Apply Performance label from issues or PR text
        uses: actions/github-script@v7
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
          script: |
            const { owner, repo } = context.repo;
            const pr = context.payload.pull_request;
            const text = `${pr.title}\n${pr.body || ''}`.toLowerCase();
            const keywordMatch = /(perf|performance|benchmark|optimiz|allocation|memory pressure|throughput|latency)/i.test(text);
            const issueNumbers = new Set();

            for (const match of text.matchAll(/(?:closes|fixes|related to)\s+#(\d+)/gi)) {
              issueNumbers.add(Number(match[1]));
            }

            for (const match of text.matchAll(/#(\d+)/g)) {
              issueNumbers.add(Number(match[1]));
            }

            let issueMatch = false;

            for (const number of issueNumbers) {
              const issue = await github.rest.issues.get({ owner, repo, issue_number: number });
              const labels = issue.data.labels.map(label => label.name);

              if (labels.includes('performance')) {
                issueMatch = true;
                break;
              }
            }

            if (!keywordMatch && !issueMatch) {
              core.info('Performance label not applicable for this PR.');
              return;
            }

            const currentLabels = pr.labels.map(label => label.name);
            if (currentLabels.includes('performance')) {
              core.info('Performance label already present.');
              return;
            }

            await github.rest.issues.addLabels({
              owner,
              repo,
              issue_number: pr.number,
              labels: ['performance']
            });
            core.info('Performance label added.');