name: Linux Build

# Controls when the action will run. Triggers the workflow on push or pull request
# events but only for the master branch
on:
  push:
    branches:
      - master
    paths-ignore:
      - .gitignore
      - "**/*.md"
      - .clang-format
      - debian-packager/
      - bin/PCSX2_keys.ini.default
      - "pcsx2/PAD/Windows/**"
  pull_request:
    branches:
      - master
    paths-ignore:
      - .gitignore
      - "**/*.md"
      - .clang-format
      - debian-packager/
      - bin/PCSX2_keys.ini.default
      - "pcsx2/PAD/Windows/**"

jobs:
  build:
    strategy:
      # Prevent one build from failing everything (although maybe those should be included as experimental builds instead)
      fail-fast: false
      matrix:
        include:
          - os: ubuntu-20.04
            platform: x86
            compiler: gcc
            experimental: false
          - os: ubuntu-20.04
            platform: x64
            compiler: gcc
            experimental: false
          - os: ubuntu-20.04
            platform: x86
            compiler: clang
            # Need to disable PCH until cmake 3.17
            # (PCH conflicts with ccache, fixed by https://gitlab.kitware.com/cmake/cmake/-/merge_requests/4400)
            cmakeflags: -DCMAKE_DISABLE_PRECOMPILE_HEADERS=ON
            detail: -nopch
            experimental: false
          - os: ubuntu-20.04
            platform: x86
            compiler: gcc
            cmakeflags: -DCMAKE_DISABLE_PRECOMPILE_HEADERS=ON
            detail: -nopch
            experimental: false

    name: ${{ matrix.os }}-${{ matrix.platform }}-${{ matrix.compiler }}${{ matrix.detail }}
    runs-on: ${{ matrix.os }}
    continue-on-error: ${{ matrix.experimental }}
    # Set some sort of timeout in the event of run-away builds.  We are limited on concurrent jobs so, get rid of them.
    timeout-minutes: 30

    steps:
      # NOTE - useful for debugging
      # - name: Dump GitHub context
      #   env:
      #     GITHUB_CONTEXT: ${{ toJson(github) }}
      #   run: |
      #     echo "$GITHUB_CONTEXT"
      #     echo ${{ github.event.pull_request.title }}

      - name: Checkout Repository
        uses: actions/checkout@v2

      - name: Checkout Submodules
        if: steps.cache-submodules.outputs.cache-hit != 'true'
        run: git submodule update --init --recursive --jobs 2

      # -- SETUP CCACHE - https://cristianadam.eu/20200113/speeding-up-c-plus-plus-github-actions-using-ccache/
      - name: Prepare ccache timestamp
        id: ccache_cache_timestamp
        shell: cmake -P {0}
        run: |
          string(TIMESTAMP current_date "%Y-%m-%d-%H;%M;%S" UTC)
          message("::set-output name=timestamp::${current_date}")

      - name: ccache cache files
        uses: actions/cache@v2.1.4
        with:
          path: .ccache
          key: ${{ matrix.os }}-${{ matrix.platform }}-${{ matrix.compiler }}${{ matrix.detail }}-ccache-${{ steps.ccache_cache_timestamp.outputs.timestamp }}
          restore-keys: |
            ${{ matrix.os }}-${{ matrix.platform }}-${{ matrix.compiler }}${{ matrix.detail }}-ccache-

      - name: Install Packages
        env:
          PLATFORM: ${{ matrix.platform }}
          COMPILER: ${{ matrix.compiler }}
        run: ./.github/workflows/scripts/linux/install-packages.sh

      - name: Generate CMake
        env:
          PLATFORM: ${{ matrix.platform }}
          COMPILER: ${{ matrix.compiler }}
          ADDITIONAL_CMAKE_ARGS: ${{ matrix.cmakeflags }}
        run: ./.github/workflows/scripts/linux/generate-cmake.sh

      - name: Build PCSX2
        working-directory: ./build
        run: ../.github/workflows/scripts/linux/compile.sh