validate-pr.yml

name: Validate PR Titles

on:
  pull_request:
    types: [opened, edited, synchronize, reopened]

permissions:
  contents: read
  pull-requests: write

jobs:
  validate-pr-title:
    runs-on: ubuntu-latest
    steps:
      - name: Get PR Title
        id: pr
        uses: actions/github-script@v7
        with:
          script: |
            const title = context.payload.pull_request.title;
            core.setOutput('title', title);

      - name: PR title must start with emoji
        uses: actions/github-script@v7
        with:
          script: |
            const prTitle = '${{ steps.pr.outputs.title }}';

            // Match either:
            // 1. Unicode emoji at start (using Unicode properties)
            // 2. GitHub emoji shortcode format (e.g. :fire:)
            const emojiRegex = /^(?:[\p{Emoji_Presentation}\p{Extended_Pictographic}]|:[a-z0-9_+-]+:)/u;

            // Get all comments
            const comments = await github.rest.issues.listComments({
              owner: context.repo.owner,
              repo: context.repo.repo,
              issue_number: context.issue.number
            });

            // Find our bot's validation comment if it exists
            const botComment = comments.data.find(comment =>
              comment.user.type === 'Bot' &&
              comment.body.includes('Your PR title must start with an emoji!')
            );

            if (!emojiRegex.test(prTitle)) {
              // Only add a comment if we haven't already
              if (!botComment) {
                await github.rest.issues.createComment({
                  owner: context.repo.owner,
                  repo: context.repo.repo,
                  issue_number: context.issue.number,
                  body: `⚠️ Your PR title must start with an emoji!\n\nExample valid titles:\n- ✨ Add new feature (or :sparkles: Add new feature)\n- 🐛 Fix login bug (or :bug: Fix login bug)\n- 📝 Update documentation (or :memo: Update documentation)\n\nNeed emoji suggestions? Check out [gitmoji.dev](https://gitmoji.dev) for a comprehensive list of Git-friendly emojis!\n\nPlease update your PR title and try again.`
                });
              }

              core.setFailed(`PR title must start with an emoji! Current title: "${prTitle}". Use either Unicode emoji (🔥) or GitHub shortcode format (:fire:)`);
            } else if (botComment) {
              // If title is now valid and we have a comment, delete it
              await github.rest.issues.deleteComment({
                owner: context.repo.owner,
                repo: context.repo.repo,
                comment_id: botComment.id
              });
            }