name: Run tests

on: [push, pull_request]

jobs:
  build:

    runs-on: ubuntu-latest
    strategy:
      matrix:
        compiler: [gcc, clang]
        python-ruby-version:
          - {python: 3.9, ruby: 2.7}
          - {python: 3.9, ruby: 2.7, other: test-flags-override}
          - {python: 3.9, ruby: 2.7, other: test-debug}
          - {python: 3.9, ruby: 2.7, other: linker-bfd}
          - {python: 3.9, ruby: 2.7, other: linker-gold}
          # Test several Python versions with the latest Ruby version
          - {python: 3.8, ruby: 2.7}
          - {python: 3.7, ruby: 2.7}
          - {python: 3.6, ruby: 2.7}
          - {python: 3.5, ruby: 2.7}
          - {python: pypy3, ruby: 2.7}
          # Test several Ruby versions with the latest Python version
          - {python: 3.9, ruby: 2.6}
          - {python: 3.9, ruby: 2.5}
        exclude:
          - compiler: clang
            python-ruby-version: {python: 3.9, ruby: 2.7, other: linker-bfd}
          - compiler: clang
            python-ruby-version: {python: 3.9, ruby: 2.7, other: linker-gold}

    steps:
    - uses: actions/checkout@v2

    - name: Set up Python ${{ matrix.python-ruby-version.python }}
      uses: actions/setup-python@v2
      with:
        python-version: ${{ matrix.python-ruby-version.python }}

    - name: Set up Ruby ${{ matrix.python-ruby-version.ruby }}
      uses: actions/setup-ruby@v1
      with:
        ruby-version: ${{ matrix.python-ruby-version.ruby }}

    - name: Install dependencies
      run: |
        sudo apt-get update -qq
        sudo apt-get install -qqy \
            bison \
            clang \
            flex \
            gawk \
            gettext \
            libaudit-dev \
            libcap-dev \
            libcap-ng-dev \
            libcunit1-dev \
            libdbus-glib-1-dev \
            libpcre3-dev \
            python3-dev \
            python-dev \
            ruby-dev \
            swig \
            xmlto

        pip install flake8

    - name: Configure the environment
      run: |
        DESTDIR=/tmp/destdir
        echo "PYTHON=python" >> $GITHUB_ENV
        echo "RUBY=ruby" >> $GITHUB_ENV
        echo "DESTDIR=$DESTDIR" >> $GITHUB_ENV

        CC=${{ matrix.compiler }}
        if [ "${{ matrix.python-ruby-version.other }}" = "linker-bfd" ] ; then
            CC="$CC -fuse-ld=bfd"
        elif [ "${{ matrix.python-ruby-version.other }}" = "linker-gold" ] ; then
            CC="$CC -fuse-ld=gold"
        fi
        echo "CC=$CC" >> $GITHUB_ENV

        EXPLICIT_MAKE_VARS=
        if [ "${{ matrix.python-ruby-version.other }}" = "test-flags-override" ] ; then
            # Test that overriding CFLAGS, LDFLAGS and other variables works fine
            EXPLICIT_MAKE_VARS="CFLAGS=-I$DESTDIR/usr/include LDFLAGS=-L$DESTDIR/usr/lib LDLIBS= CPPFLAGS="
        elif [ "${{ matrix.python-ruby-version.other }}" = "test-debug" ] ; then
            # Test hat debug build works fine
            EXPLICIT_MAKE_VARS="DEBUG=1"
        else
            EXPLICIT_MAKE_VARS=
        fi
        echo "EXPLICIT_MAKE_VARS=${EXPLICIT_MAKE_VARS}" >> $GITHUB_ENV

        # Find files in order of pkgconf to be able to find Python.h
        # For example with Python 3.5:
        # * python is located at /opt/hostedtoolcache/Python/3.5.10/x64/bin/python
        # * sys.prefix is /opt/hostedtoolcache/Python/3.5.10/x64
        # * Python.h is located at /opt/hostedtoolcache/Python/3.5.10/x64/include/python3.5m/Python.h
        # * python-3.5.pc is located at /opt/hostedtoolcache/Python/3.5.10/x64/lib/pkgconfig/python-3.5.pc
        PYTHON_SYS_PREFIX="$(python -c 'import sys;print(sys.prefix)')"
        echo "PKG_CONFIG_PATH=${PYTHON_SYS_PREFIX}/lib/pkgconfig" >> $GITHUB_ENV

        if [ "${{ matrix.python-ruby-version.python }}" = "pypy3" ] ; then
            # PyPy does not provide a config file for pkg-config
            # libpypy-c.so is provided in bin/libpypy-c.so for PyPy and bin/libpypy3-c.so for PyPy3
            echo "PYINC=-I${PYTHON_SYS_PREFIX}/include" >> $GITHUB_ENV
            echo "PYLIBS=-L${PYTHON_SYS_PREFIX}/bin -lpypy3-c" >> $GITHUB_ENV
        fi

        # Display the final environment file, for debugging purpose
        cat $GITHUB_ENV

    - name: Download and install refpolicy headers for sepolgen tests
      run: |
        curl --location --retry 10 -o refpolicy.tar.bz2 https://github.com/SELinuxProject/refpolicy/releases/download/RELEASE_2_20180701/refpolicy-2.20180701.tar.bz2
        tar -xvjf refpolicy.tar.bz2
        sed -e "s,^PREFIX :=.*,PREFIX := $DESTDIR/usr," -i refpolicy/support/Makefile.devel
        sudo make -C refpolicy install-headers clean
        sudo mkdir -p /etc/selinux
        echo 'SELINUXTYPE=refpolicy' | sudo tee /etc/selinux/config
        echo 'SELINUX_DEVEL_PATH = /usr/share/selinux/refpolicy' | sudo tee /etc/selinux/sepolgen.conf
        sed -e "s,\"\(/usr/bin/[cs]\),\"$DESTDIR\1," -i python/sepolgen/src/sepolgen/module.py
        rm -r refpolicy refpolicy.tar.bz2

    - name: Display versions
      run: |
        echo "::group::Compiler ($CC):"
        $CC --version
        echo "::endgroup::"
        echo "::group::Python ($(which "$PYTHON")):"
        $PYTHON --version
        echo "::endgroup::"
        echo "::group::Ruby ($(which "$RUBY")):"
        $RUBY --version
        echo "::endgroup::"

    - name: Run tests
      run: |
        echo "::group::make install"
        make -j$(nproc) install $EXPLICIT_MAKE_VARS -k
        echo "::endgroup::"
        echo "::group::make install-pywrap"
        make -j$(nproc) install-pywrap $EXPLICIT_MAKE_VARS -k
        echo "::endgroup::"
        echo "::group::make install-rubywrap"
        make -j$(nproc) install-rubywrap $EXPLICIT_MAKE_VARS -k
        echo "::endgroup::"

        # Now that everything is installed, run "make all" to build everything which may have not been built
        echo "::group::make all"
        make -j$(nproc) all $EXPLICIT_MAKE_VARS -k
        echo "::endgroup::"

        # Set up environment variables for the tests and show variables (to help debugging issues)
        echo "::group::Environment variables"
        . ./scripts/env_use_destdir
        echo "LD_LIBRARY_PATH=$LD_LIBRARY_PATH"
        echo "PATH=$PATH"
        echo "PYTHONPATH=$PYTHONPATH"
        echo "RUBYLIB=$RUBYLIB"
        echo "::endgroup::"

        # Run tests
        echo "::group::make test"
        make test $EXPLICIT_MAKE_VARS
        echo "::endgroup::"

        # Test Python and Ruby wrappers
        echo "::group::Test Python and Ruby wrappers"
        $PYTHON -c 'import selinux;import selinux.audit2why;import semanage;print(selinux.is_selinux_enabled())'
        $RUBY -e 'require "selinux";require "semanage";puts Selinux::is_selinux_enabled()'
        echo "::endgroup::"

        # Run Python linter, but not on the downloaded refpolicy
        echo "::group::scripts/run-flake8"
        ./scripts/run-flake8
        echo "::endgroup::"

        echo "::group::Test .gitignore and make clean distclean"
        # Remove every installed files
        rm -rf "$DESTDIR"
        # Test that "git status" looks clean, or print a clear error message
        git status --short | sed -n 's/^??/error: missing .gitignore entry for/p' | (! grep '^')
        # Clean up everything and show which file needs to be added to "make clean"
        make clean distclean $EXPLICIT_MAKE_VARS
        git ls-files --ignored --others --exclude-standard | sed 's/^/error: "make clean distclean" did not remove /' | (! grep '^')
        echo "::endgroup::"