flutter__agent-plugins/.github/workflows/block-dart-skills-prs.yaml

name: Block Upstream Skill Modifications

permissions:
  contents: read
  pull-requests: write

# zizmor: ignore[dangerous-triggers] - {Needed to detect when Dart skills are modified}
on:
  # zizmor: ignore[dangerous-triggers] - {Needed to detect when Dart skills are modified}
  pull_request_target:
    types: [opened, synchronize, reopened]
    paths:
      # Triggers if any file inside folders prefixed with "dart-" is modified
      - 'skills/dart-**'

jobs:
  prevent-modifications:
    runs-on: ubuntu-latest
    permissions:
      pull-requests: write
    # Skip the block check ONLY if the PR is originating from the sync branch on the main repository.
    if: |
      github.event.pull_request.head.repo.full_name != github.repository ||
      github.event.pull_request.head.ref != 'automation/sync-dart-skills'
    steps:
      - name: Fail Action and Comment on PR
        uses: actions/github-script@f28e40c7f34bde8b3046d885e986cb6290c5673b # v7.1.0
        with:
          script: |
            const prNumber = context.payload.pull_request.number;
            const owner = context.repo.owner;
            const repo = context.repo.repo;

            // Retrieve comments to avoid duplicate spam
            const { data: comments } = await github.rest.issues.listComments({
              owner,
              repo,
              issue_number: prNumber,
            });

            const botCommentIdentifier = "⚠️ **DO NOT modify these files!**";
            const alreadyCommented = comments.some(comment => comment.body.includes(botCommentIdentifier));

            if (!alreadyCommented) {
              const message = `⚠️ **DO NOT modify these files!**\n\n` +
                              `The files within \`skills/dart-*\` are **automatically synchronized** from the upstream [dart-lang/skills](https://github.com/dart-lang/skills) repository.\n\n` +
                              `Please close this Pull Request and submit your changes to the [upstream repository](https://github.com/dart-lang/skills) instead. Once merged upstream, your updates will be automatically brought over here.`;
              
              await github.rest.issues.createComment({
                owner,
                repo,
                issue_number: prNumber,
                body: message
              });
            }
            
            // Fail the workflow to block the PR from merging
            core.setFailed("Direct changes to synced Dart skills are prohibited in this repository.");