name: CI

on:
  - push
  - pull_request

jobs:
  build:
    runs-on: ubuntu-latest

    strategy:
      fail-fast: false
      matrix:
        libgccjit_version: ["libgccjit.so", "libgccjit_without_int128.so"]

    steps:
    - uses: actions/checkout@v2

    - uses: actions/checkout@v2
      with:
        repository: llvm/llvm-project
        path: llvm

    - name: Install packages
      run: sudo apt-get install ninja-build ripgrep

    - name: Download artifact
      uses: dawidd6/action-download-artifact@v2
      with:
          workflow: main.yml
          name: ${{ matrix.libgccjit_version }}
          path: gcc-build
          repo: antoyo/gcc
          search_artifacts: true # Because, instead, the action only check the last job ran and that won't work since we want multiple artifacts.

    - name: Setup path to libgccjit
      run: |
          echo $(readlink -f gcc-build) > gcc_path
          # NOTE: the filename is still libgccjit.so even when the artifact name is different.
          ln gcc-build/libgccjit.so gcc-build/libgccjit.so.0

    - name: Set env
      run: |
        echo "LIBRARY_PATH=$(cat gcc_path)" >> $GITHUB_ENV
        echo "LD_LIBRARY_PATH=$(cat gcc_path)" >> $GITHUB_ENV
        echo "workspace="$GITHUB_WORKSPACE >> $GITHUB_ENV

    - name: Set RUST_COMPILER_RT_ROOT
      run: echo "RUST_COMPILER_RT_ROOT="${{ env.workspace }}/llvm/compiler-rt >> $GITHUB_ENV

    # https://github.com/actions/cache/issues/133
    - name: Fixup owner of ~/.cargo/
      # Don't remove the trailing /. It is necessary to follow the symlink.
      run: sudo chown -R $(whoami):$(id -ng) ~/.cargo/

    - name: Cache cargo installed crates
      uses: actions/cache@v1.1.2
      with:
        path: ~/.cargo/bin
        key: cargo-installed-crates2-ubuntu-latest

    - name: Cache cargo registry
      uses: actions/cache@v1
      with:
        path: ~/.cargo/registry
        key: ${{ runner.os }}-cargo-registry2-${{ hashFiles('**/Cargo.lock') }}

    - name: Cache cargo index
      uses: actions/cache@v1
      with:
        path: ~/.cargo/git
        key: ${{ runner.os }}-cargo-index-${{ hashFiles('**/Cargo.lock') }}

    - name: Cache cargo target dir
      uses: actions/cache@v1.1.2
      with:
        path: target
        key: ${{ runner.os }}-cargo-build-target-${{ hashFiles('rust-toolchain') }}

    - name: Build
      run: |
        ./prepare_build.sh
        ./build.sh
        cargo test
        ./clean_all.sh

    - name: Prepare dependencies
      run: |
        git config --global user.email "user@example.com"
        git config --global user.name "User"
        ./prepare.sh

    # Compile is a separate step, as the actions-rs/cargo action supports error annotations
    - name: Compile
      uses: actions-rs/cargo@v1.0.3
      with:
        command: build
        args: --release

    - name: Test
      run: |
        # Enable backtraces for easier debugging
        export RUST_BACKTRACE=1

        # Reduce amount of benchmark runs as they are slow
        export COMPILE_RUNS=2
        export RUN_RUNS=2

        ./test.sh --release