name: Build emu (Linux)

on:
  workflow_call:
    # needed since it allows this to become a reusable workflow
  workflow_dispatch:
    # allows manual trigger

permissions:
  contents: write

env:
  PREMAKE_ACTION: gmake2
  DEPS_CACHE_KEY: emu-deps-linux
  DEPS_CACHE_DIR: build/deps/linux

  PACKAGE_BASE_DIR: "build/package/linux"
  THIRD_PARTY_BASE_DIR: 'third-party'
  
jobs:
  deps:
    name: Restore or build deps
    if: ${{ !cancelled() }}
    uses: ./.github/workflows/emu-deps-linux.yml

  builds-matrix-linux:
    name: build
    needs: [ deps ]
    runs-on: ubuntu-24.04
    if: ${{ !cancelled() }}
    continue-on-error: true
    
    strategy:
      fail-fast: false
      matrix:
        prj: [
          # regular api
          'api_regular', 'steamclient_regular',
          # api + client (experimental)
          'api_experimental', 'steamclient_experimental',
          # tools
          'tool_lobby_connect', 'tool_generate_interfaces',
        ]
        arch: [ 'x64', 'x32', ]
        cfg: [ 'debug', 'release', ]
    
    
    steps:
### clone branch
      - name: Checkout branch
        uses: actions/checkout@v4

### deps
      - name: Restore deps
        id: emu-deps-cache-step
        uses: actions/cache@v4
        with:
          key: ${{ env.DEPS_CACHE_KEY }}-${{ env.PREMAKE_ACTION }}
          path: ${{ env.DEPS_CACHE_DIR }}/${{ env.PREMAKE_ACTION }}

## extra helpers/tools, these are not built inside the deps build dir
      - name: Clone third-party build helpers (common/linux)
        uses: actions/checkout@v4
        with:
          ref: 'third-party/common/linux'
          path: "${{env.THIRD_PARTY_BASE_DIR}}/common/linux"

      - name: Clone third-party build helpers (build/linux)
        uses: actions/checkout@v4
        with:
          ref: 'third-party/build/linux'
          path: "${{env.THIRD_PARTY_BASE_DIR}}/build/linux"

### fix folder permissions! not sure why this fails
    # nested subdirs "build/linux/release" cause permission problems
      - name: Give all permissions to repo folder
        shell: bash
        working-directory: ${{ github.workspace }}
        run: sudo chmod -R 777 "${{ github.workspace }}"

### generate project files
      - name: Generate project files
        shell: bash
        working-directory: ${{ github.workspace }}
        run: |
          sudo chmod 777 ./${{env.THIRD_PARTY_BASE_DIR}}/common/linux/premake/premake5
          ./${{env.THIRD_PARTY_BASE_DIR}}/common/linux/premake/premake5 --file=premake5.lua --genproto --emubuild=${{ github.sha }} --os=linux gmake2

## mandatory Linux packages
      - name: Install required packages
        shell: bash
        run: |
          sudo apt update -y
          sudo apt install -y coreutils # echo, printf, etc...
          sudo apt install -y build-essential
          sudo apt install -y gcc-multilib # needed for 32-bit builds
          sudo apt install -y g++-multilib
          # sudo apt install -y clang
          sudo apt install -y libglx-dev # needed for overlay build (header files such as GL/glx.h)
          sudo apt install -y libgl-dev # needed for overlay build (header files such as GL/gl.h)
          # sudo apt install -y binutils # (optional) contains the tool 'readelf' mainly, and other usefull binary stuff

### build target
      - name: Build target
        shell: bash
        working-directory: ${{ github.workspace }}/build/project/gmake2/linux
        run: |
          echo "dry run..."
          make -n -j 2 config=${{ matrix.cfg }}_${{ matrix.arch }} ${{ matrix.prj }}
          echo "actual run..."
          make -j 2 config=${{ matrix.cfg }}_${{ matrix.arch }} ${{ matrix.prj }}

### upload artifact/package to github Actions
      - name: Upload target package
        uses: actions/upload-artifact@v4
        with:
          name: "emu-linux-${{ matrix.prj }}-${{ matrix.cfg }}-${{ matrix.arch }}-${{ github.sha }}"
          path: "build/linux"
          if-no-files-found: 'error'
          compression-level: 9
          retention-days: 1