name: checks

# Repository checks that answer pass or fail and build nothing. Deliberately
# not part of build.yml: that workflow is also what release.yml calls, and a
# check has no business running again while a release is being assembled.
on:
  pull_request:

jobs:
  # VFS resolves paths case-insensitively, so two data files whose names differ
  # only in case are one file to the game, and which of them wins is down to the
  # order the directory happened to be read in. NTFS made that unrepresentable;
  # a Linux checkout and a release assembled on Linux can both hold it, and it
  # goes wrong quietly, so it is checked rather than discovered.
  data_case:
    runs-on: ubuntu-latest
    steps:
      # the check reads the index, not the files, so no blob has to be fetched
      - name: Checkout source
        uses: actions/checkout@v7
        with:
          filter: 'blob:none'
          sparse-checkout: .github/scripts

      - name: Check game data for paths that differ only in case
        run: python3 .github/scripts/check-data-case.py