# Copyright (C) 2020 Sebastian Pipping <sebastian@pipping.org>
# Licensed under the MIT license

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

on:
- pull_request
- push

jobs:
  checks:
    name: Check expat_config.h.{in,cmake} for regressions
    runs-on: ubuntu-latest
    steps:
    - uses: actions/checkout@v2.3.4
    - 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 < ci_expat_config_h/expat_config_h_in__expected.txt) <(./ci_expat_config_h/list_exported_macros.sh expat/expat_config.h.in)
        diff -u <(sort < ci_expat_config_h/expat_config_h_cmake__expected.txt) <(./ci_expat_config_h/list_exported_macros.sh expat/expat_config.h.cmake)

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