<?php

if ('cli' !== PHP_SAPI) {
    echo "This script can only be run from the command line.\n";
    exit(1);
}

$mainRepo = 'https://github.com/symfony/symfony';
exec('find src -name composer.json', $packages);

foreach ($packages as $package) {
    $package = dirname($package);
    $c = file_get_contents($package.'/.gitattributes');
    $c = preg_replace('{^/\.git.*+\n}m', '', $c);
    $c .= "/.git* export-ignore\n";
    file_put_contents($package.'/.gitattributes', $c);

    @mkdir($package.'/.github');
    file_put_contents($package.'/.github/PULL_REQUEST_TEMPLATE.md', <<<EOTXT
        Please do not submit any Pull Requests here. They will be closed.
        ---

        Please submit your PR here instead:
        {$mainRepo}

        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!

        EOTXT
    );

    @mkdir($package.'/.github/workflows');
    file_put_contents($package.'/.github/workflows/close-pull-request.yml', <<<EOTXT
        name: Close Pull Request

        on:
          pull_request_target:
            types: [opened]

        jobs:
          run:
            runs-on: ubuntu-latest
            steps:
            - uses: superbrothers/close-pull-request@v3
              with:
                comment: |
                  Thanks for your Pull Request! We love contributions.

                  However, you should instead open your PR on the main repository:
                  {$mainRepo}

                  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!

        EOTXT
    );
}