name: Rust

on:
  push:
    branches: [ '*' ]
  pull_request:
    branches: [ '*' ]

env:
  CARGO_TERM_COLOR: always

jobs:
  test-u32:
    name: Test u32 backend
    runs-on: ubuntu-latest
    steps:
    - uses: actions/checkout@v3
    - uses: dtolnay/rust-toolchain@stable
    - run: cargo test --no-default-features --features "std u32_backend"

  test-u64:
    name: Test u64 backend
    runs-on: ubuntu-latest
    steps:
    - uses: actions/checkout@v3
    - uses: dtolnay/rust-toolchain@stable
    - run: cargo test --no-default-features --features "std u64_backend"

  build-simd:
    name: Build simd backend (nightly)
    runs-on: ubuntu-latest
    steps:
    - uses: actions/checkout@v3
    - uses: dtolnay/rust-toolchain@nightly
    # Build with AVX2 features, then with AVX512 features
    - env:
        RUSTFLAGS: "-C target_feature=+avx2"
      run: cargo build --no-default-features --features "std simd_backend"
    - env:
        RUSTFLAGS: "-C target_feature=+avx512ifma"
      run: cargo build --no-default-features --features "std simd_backend"

  test-defaults-serde:
    name: Test default feature selection and serde
    runs-on: ubuntu-latest
    steps:
    - uses: actions/checkout@v3
    - uses: dtolnay/rust-toolchain@stable
    - run: cargo test --features "serde"

  test-alloc-u32:
    name: Test no_std+alloc with u32 backend
    runs-on: ubuntu-latest
    steps:
    - uses: actions/checkout@v3
    - uses: dtolnay/rust-toolchain@stable
    - run: cargo test --lib --no-default-features --features "alloc u32_backend"

  nightly:
    name: Test nightly compiler
    runs-on: ubuntu-latest
    steps:
    - uses: actions/checkout@v3
    - uses: dtolnay/rust-toolchain@nightly
    - run: cargo test --features "nightly"

  msrv:
    name: Current MSRV is 1.56.1
    runs-on: ubuntu-latest
    steps:
    - uses: actions/checkout@v3
    # First run `cargo +nightly -Z minimal-verisons check` in order to get a
    # Cargo.lock with the oldest possible deps
    - uses: dtolnay/rust-toolchain@nightly
    - run: cargo -Z minimal-versions check --no-default-features --features "fiat_u64_backend serde"
    # Now check that `cargo build` works with respect to the oldest possible
    # deps and the stated MSRV
    - uses: dtolnay/rust-toolchain@1.56.1
    - run: cargo build --no-default-features --features "fiat_u64_backend serde"

  bench:
    name: Check that benchmarks compile
    runs-on: ubuntu-latest
    steps:
    - uses: actions/checkout@v3
    - uses: dtolnay/rust-toolchain@stable
    # This filter selects no benchmarks, so we don't run any, only build them.
    - run: cargo bench "nonexistentbenchmark"