name: Rust

on:
  push:
    branches: [ "main" ]
  pull_request:
    branches: [ "main" ]

env:
  CARGO_TERM_COLOR: always

jobs:
  test:
    name: Test on ${{ matrix.target }}
    runs-on: ubuntu-latest
    strategy:
      fail-fast: false
      matrix:
        include:
          - target: x86_64-unknown-linux-gnu
            toolchain: stable
          - target: aarch64-unknown-linux-gnu
            toolchain: stable
          - target: riscv64gc-unknown-linux-gnu
            toolchain: stable
          - target: loongarch64-unknown-linux-gnu
            toolchain: stable
          - target: s390x-unknown-linux-gnu
            toolchain: stable
          # powerpc64 uses experimental asm features
          - target: powerpc64le-unknown-linux-gnu
            toolchain: nightly
          - target: powerpc64-unknown-linux-gnu
            toolchain: nightly
          - target: armv7-unknown-linux-gnueabihf
            toolchain: stable
          # riscv32 is tier-3
          - target: riscv32gc-unknown-linux-gnu
            toolchain: nightly
            components: rust-src
            build_std: true

    steps:
    - name: "Checkout"
      uses: actions/checkout@v6

    - name: "Setup Rust toolchain"
      uses: actions-rust-lang/setup-rust-toolchain@v1
      with:
        toolchain: ${{ matrix.toolchain }}
        components: ${{ matrix.components || '' }}
        rustflags: ""

    - name: "Add Rust target"
      if: ${{ !matrix.build_std }}
      run: rustup target add ${{ matrix.target }}

    - name: "Make Mold the default linker"
      uses: rui314/setup-mold@v1

    - name: "Setup cross-compilation toolchain"
      uses: taiki-e/setup-cross-toolchain-action@v1
      with:
        target: ${{ matrix.target }}

    - name: "Build"
      run: cargo build --verbose --target ${{ matrix.target }} ${{ matrix.build_std && '-Z build-std=core,alloc,panic_abort' || '' }}

    # tier-3 targets have no prebuilt std and tests are arch-agnostic, so
    # run them against the host toolchain instead of the cross target.
    - name: "Run tests"
      run: cargo test --workspace --exclude microfetch --verbose ${{ matrix.build_std && '--target x86_64-unknown-linux-gnu' || '' }}