name: validate_new_filenames
on: [push, pull_request]
jobs:
  validate_new_filenames:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v1
      - run: git remote set-url origin https://x-access-token:${{ secrets.GITHUB_TOKEN }}@github.com/$GITHUB_REPOSITORY
      - run: git diff origin/master --name-only > git_diff.txt
      - name: Validate new filenames
        shell: python
        run: |
          import os
          import sys
          print(sys.version_info)  # legacy Python :-(
          with open("git_diff.txt") as in_file:
            cpp_files = sorted(line.strip() for line in in_file
                               if line.strip().lower().endswith(".cpp"))

          upper_files = [file for file in cpp_files if file != file.lower()]
          if upper_files:
            print("{} files contain uppercase characters:".format(len(upper_files)))
            print("\n".join(upper_files) + "\n")

          space_files = [file for file in cpp_files if " " in file or "-" in file]
          if space_files:
            print("{} files contain space or dash characters:".format(len(space_files)))
            print("\n".join(space_files) + "\n")

          nodir_files = [file for file in cpp_files if os.sep not in file]
          if nodir_files:
            print("{} files are not in a directory:".format(len(nodir_files)))
            print("\n".join(nodir_files) + "\n")

          bad_files = len(upper_files + space_files + nodir_files)
          if bad_files:
            sys.exit(bad_files)