check-subtree-split.yml

name: Check subtree split

on:
  pull_request_target:

jobs:
  close-pull-request:
    runs-on: ubuntu-latest

    steps:
    - name: Close pull request
      uses: actions/github-script@v6
      with:
        script: |
          if (context.repo.owner === "symfony") {
            const monoRepo = /^polyfill-/.test(context.repo.repo) ? "polyfill" : (/^(ux-|stimulus-bundle)/.test(context.repo.repo) ? "ux" : "symfony");

            github.rest.issues.createComment({
              owner: "symfony",
              repo: context.repo.repo,
              issue_number: context.issue.number,
              body: `
          Thanks for your pull request! We love contributions.

          However, you should instead open a pull request on the main repository:

          https://github.com/symfony/${monoRepo}

          This repository is what we call a "subtree split": a read-only subset of that main repository.

          We're looking forward to your PR there!
          `
            });

            github.rest.pulls.update({
              owner: "symfony",
              repo: context.repo.repo,
              pull_number: context.issue.number,
              state: "closed"
            });
          }