name: Linux

on:
  push:
    paths-ignore:
    - 'docs/**'
    - '.github/workflows/**'
    - '!.github/workflows/test_linux.yml'

jobs:
  build:
    strategy:
      fail-fast: false
      matrix:
        cfg:
#-------- Operating Systems ----------------
          - { os: ubuntu, tag: 18.04,   arch: debian }         # EOL April 2023
          - { os: ubuntu, tag: 20.04,   arch: debian }         # EOL April 2025
          - { os: debian, tag: 10,      arch: debian }               # EOL 2024
          - { os: centos, tag: 7,       arch: rhel   }          # EOL June 2024
          - { os: centos, tag: latest,  arch: rhel   }     # 8 as of April 2020
          - { os: fedora, tag: latest,  arch: rhel   }    # 31 as of April 2020
        # - { os: fedora, tag: 33,      arch: rhel   } # feeling confident?
        # - { os: fedora, tag: rawhide, arch: rhel   } # for thrill-seekers only

#-------- Defaults --------------------------
        include:
          - cfg: {}
            deps: >-
              bison
              clang
              flex
              git
              llvm
              make
              maven
              swig
              cmake
            install_gtest: echo gtest already installed
            conf_pkg:  echo package manager already configured
            install_cmd: install -y
#-------- Debian-based Dependencies ----------------
          - cfg: { arch: debian }
            pkg_mgr: apt-get
            conf_pkg:  apt-get update
            arch_deps: >-
              curl
              g++
              libx11-dev
              libxml2-dev
              libxt-dev
              libmotif-common
              libmotif-dev
              python2.7-dev
              zlib1g-dev
              llvm-dev
              libclang-dev
              libudunits2-dev
              libgtest-dev
            install_gtest: cd /usr/src/gtest && cmake . && make && cp libgtest* /usr/lib/
#-------- RHEL Dependencies ----------------
          - cfg: { arch: rhel }
            arch_deps: >-
              clang-devel
              gcc
              gcc-c++
              java-11-openjdk-devel
              libxml2-devel
              llvm-devel
              llvm-static
              ncurses-devel
              openmotif
              openmotif-devel
              perl
              perl-Digest-MD5
              udunits2
              udunits2-devel
              which
              zlib-devel
              gtest-devel
#-------- Ubuntu Only Dependencies ----------------
          - cfg: { os: ubuntu }
            os_deps: >-
              openjdk-11-jdk
#-------- Debian OS Only Dependencies ----------------
          - cfg: { os: debian }
            os_deps: >-
              openjdk-11-jdk
#-------- CentOS Only Dependencies ----------------
          - cfg: { os: centos }
            pkg_mgr: yum
            conf_pkg: yum -y install epel-release && yum -y update
            os_deps: >-
              libX11-devel
              libXt-devel
#-------- Fedora Only Dependencies ----------------
          - cfg: { os: fedora }
            pkg_mgr: dnf
            os_deps: >-
              perl-Text-Balanced
              python-devel
              diffutils
#-------- Version Specific Dependencies ----------------
          - cfg: { os: ubuntu, tag: 20.04 }
            conf_pkg: DEBIAN_FRONTEND=noninteractive && apt-get update && apt-get install -y tzdata
            install_gtest: cd /usr/src/gtest && cmake . && make && cp lib/libgtest* /usr/lib/
            tag_deps: >-
              python3.8-dev
          - cfg: { os: centos, tag: 7 }
            tag_deps: >-
              python-devel
          - cfg: { os: centos, tag: latest }
            pkg_mgr: dnf
            conf_pkg: >
              dnf -y install epel-release &&
              dnf -y update &&
              dnf install -y 'dnf-command(config-manager)' &&
              dnf config-manager --enable powertools
            tag_deps: >-
              python3-devel diffutils
#-------- Job definition ----------------
    runs-on: ubuntu-18.04
    container: docker://${{matrix.cfg.os}}:${{matrix.cfg.tag}}
    steps:
      - name: Update Package Manager
        run: ${{matrix.conf_pkg}}
      - name: Install Dependencies
        run: |
          ${{matrix.pkg_mgr}} ${{matrix.install_cmd}} ${{matrix.deps}} ${{matrix.arch_deps}} ${{matrix.os_deps}} ${{matrix.tag_deps}}
      - name: Install GTest
        run: ${{matrix.install_gtest}}
      - name: Checkout repository
        uses: actions/checkout@master
      - name: Build trick
        run: |
          export MAKEFLAGS=-j`nproc`
          ./configure
          make
      - name: Test
        run: make test