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

jobs:
    autoclose:
        runs-on: ubuntu-latest
        steps:
            - name: Close Pull Request
              uses: peter-evans/close-pull@v1
              with:
                  comment: |
                      Thanks for your pull request! We love contributions.

                      However, this repository is what we call a "subtree split": a read-only copy of one directory of the main repository. It enables developers to depend on specific repository.

                      If you want to contribute, you should instead open a pull request on the main repository:

                      https://github.com/CrystallizeAPI/libraries

                      Thank you for your contribution!

                      PS: if you haven't already, please add tests.