.github/workflows/expat_config_h.yml

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name: Check expat_config.h.{in,cmake} for regressions

on:
  pull_request:
  push:
  schedule:
    - cron: '0 2 * * 5'  # Every Friday at 2am

jobs:
  checks:
    name: Check expat_config.h.{in,cmake} for regressions
    runs-on: ubuntu-latest
    steps:
    - uses: actions/checkout@v3.0.0
    - name: Check expat_config.h.{in,cmake} for regressions
      run: |
        set -v
        # A non-empty diff indicates a change in the list of macros exported:
        # - Removals would be trouble (because expat_config.h is installed).
        # - Additions could use an extra check by a human
        ( cd expat && ./buildconf.sh )  # generate expat_config.h.in
        diff -u <(sort < .github/workflows/data/expat_config_h_in__expected.txt) <(.github/workflows/scripts/list_exported_macros.sh expat/expat_config.h.in)
        diff -u <(sort < .github/workflows/data/expat_config_h_cmake__expected.txt) <(.github/workflows/scripts/list_exported_macros.sh expat/expat_config.h.cmake)

        # Informational (and not an ideal state)
        diff -u \
            <(sort < .github/workflows/data/expat_config_h_in__expected.txt) \
            <(sort < .github/workflows/data/expat_config_h_cmake__expected.txt) \
            || true