set_pr_label.yml

name: Set release label to PR based on title and description

on:
  pull_request_target:
    types:
      - opened
      - edited

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

jobs:
  set_label:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout code
        uses: actions/checkout@v6

      - name: Assign label based on PR title
        uses: actions/github-script@v8
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
          script: |
            const pr_title = context.payload.pull_request.title;

            // Define regex patterns for labels based on conventional commit keywords
            const label_patterns_map = {
              "release::bug_fixes": /^(fix)\b/i,
              "release::enhancements": /^(feat|refactor|perf)\b/i,
              "release::ci_docs": /^(ci|docs)\b/i,
              "release::maintenance": /^(chore|style|test|build|revert)\b/i,
            };

            let assigned_label = null;

            // Check each pattern
            for (const [release_label, pattern] of Object.entries(label_patterns_map)) {
              if (pattern.test(pr_title)) {
                assigned_label = release_label;
                break; // Assign first matching label
              }
            }

            // If a label was matched, add it to PR
            if (assigned_label) {
              await github.rest.issues.addLabels({
                issue_number: context.issue.number,
                owner: context.repo.owner,
                repo: context.repo.repo,
                labels: [assigned_label]
              });
            }

      - name: Assign label based on PR description
        uses: actions/github-script@v8
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
          script: |
            const pr_body = context.payload.pull_request.body;

            const label_map = {
              "Bugfix": "release::bug_fixes",
              "Feature / enhancement": "release::enhancements",
              "CI / Documentation": "release::ci_docs",
              "Maintenance": "release::maintenance"
            };

            let assigned_label = null;

            for (const [checkbox_label, release_label] of Object.entries(label_map)) {
              const checkbox_regex = new RegExp(`- \\[x\\] ${checkbox_label}`, 'mi');
              if (checkbox_regex.test(pr_body)) {
                assigned_label = release_label;
                break; // Assign first matching label
              }
            }

            // If a label was matched, add it to PR
            if (assigned_label) {
              await github.rest.issues.addLabels({
                issue_number: context.issue.number,
                owner: context.repo.owner,
                repo: context.repo.repo,
                labels: [assigned_label]
              });
            }