# Copyright (C) 2021 Sebastian Pipping <sebastian@pipping.org>
# Licensed under the MIT license

name: Ensure that GNU Autotools and CMake build systems agree

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

jobs:
  checks:
    name: Ensure that GNU Autotools and CMake build systems agree
    runs-on: ubuntu-20.04
    steps:
    - uses: actions/checkout@v2.3.4

    - name: Install build dependencies
      run: |-
        sudo apt-get install --yes --no-install-recommends -V \
            cmake \
            docbook2x \
            lzip

    - name: Produce and extract a release archive
      run: |
        set -x
        cd expat
        ./buildconf.sh
        ./configure
        make dist
        tar xf expat-*.*.*.tar.gz

    - name: Build and install using GNU Autotools
      run: |
        set -x
        cd expat/expat-*.*.*/
        mkdir build_autotools
        cd build_autotools
        ../configure --libdir='${exec_prefix}/lib123'
        make install DESTDIR="${PWD}"/ROOT

    - name: Build and install using CMake
      run: |
        set -x
        cd expat/expat-*.*.*/
        mkdir build_cmake
        cd build_cmake
        cmake -DCMAKE_INSTALL_LIBDIR=lib123 ..
        make install DESTDIR="${PWD}"/ROOT

    - name: Check for identical CMake files from both build systems
      run: |
        set -x
        cd expat/expat-*.*.*/
        diff \
            --recursive \
            --unified \
            --exclude=xmlwf \
            --exclude=libexpat.a \
            --exclude=libexpat.la \
            --exclude='*.so*' \
            --exclude=expat_config.h \
            build_{autotools,cmake}/ROOT

    - name: Check for identical exported symbols from both build systems
      run: |
        list_shared_library_symbols_sh="${GITHUB_WORKSPACE}"/.github/workflows/scripts/list-shared-library-symbols.sh
        exported_symbols_txt="${GITHUB_WORKSPACE}"/.github/workflows/data/exported-symbols.txt

        set -x
        cd expat/expat-*.*.*/
        diff -u "${exported_symbols_txt}" <("${list_shared_library_symbols_sh}" build_autotools/ROOT/usr/local/lib*/libexpat.so)
        diff -u "${exported_symbols_txt}" <("${list_shared_library_symbols_sh}" build_cmake/ROOT/usr/local/lib*/libexpat.so)