main.yml

name: CI
on: [push, pull_request]

env:
  CARGO_TERM_VERBOSE: true
  RUSTDOCFLAGS: -Dwarnings
  RUSTFLAGS: -Dwarnings
  RUST_BACKTRACE: full

jobs:
  test:
    name: Build and test
    timeout-minutes: 20
    strategy:
      fail-fast: false
      matrix:
        include:
        - target: aarch64-apple-darwin
          os: macos-latest
        - target: aarch64-unknown-linux-gnu
          os: ubuntu-latest
        - target: aarch64-pc-windows-msvc
          os: windows-latest
          build_only: 1 # Can't run on x86 hosts
        - target: arm-unknown-linux-gnueabi
          os: ubuntu-latest
        - target: arm-unknown-linux-gnueabihf
          os: ubuntu-latest
        - target: armv7-unknown-linux-gnueabihf
          os: ubuntu-latest
        - target: i586-unknown-linux-gnu
          os: ubuntu-latest
        - target: i686-unknown-linux-gnu
          os: ubuntu-latest
        - target: loongarch64-unknown-linux-gnu
          os: ubuntu-latest
        - target: powerpc-unknown-linux-gnu
          os: ubuntu-latest
        - target: powerpc64-unknown-linux-gnu
          os: ubuntu-latest
        - target: powerpc64le-unknown-linux-gnu
          os: ubuntu-latest
        - target: riscv64gc-unknown-linux-gnu
          os: ubuntu-latest
        - target: thumbv6m-none-eabi
          os: ubuntu-latest
        - target: thumbv7em-none-eabi
          os: ubuntu-latest
        - target: thumbv7em-none-eabihf
          os: ubuntu-latest
        - target: thumbv7m-none-eabi
          os: ubuntu-latest
        - target: x86_64-unknown-linux-gnu
          os: ubuntu-latest
        - target: x86_64-apple-darwin
          os: macos-13
        - target: wasm32-unknown-unknown
          os: ubuntu-latest
          build_only: 1
        - target: i686-pc-windows-msvc
          os: windows-latest
        - target: x86_64-pc-windows-msvc
          os: windows-latest
        - target: i686-pc-windows-gnu
          os: windows-latest
          channel: nightly-i686-gnu
        - target: x86_64-pc-windows-gnu
          os: windows-latest
          channel: nightly-x86_64-gnu
    runs-on: ${{ matrix.os }}
    env:
      BUILD_ONLY: ${{ matrix.build_only }}
    steps:
    - name: Print runner information
      run: uname -a
    - uses: actions/checkout@v4
    - name: Install Rust (rustup)
      shell: bash
      run: |
        channel="nightly"
        # Account for channels that have required components (MinGW)
        [ -n "${{ matrix.channel }}" ] && channel="${{ matrix.channel }}"
        rustup update "$channel" --no-self-update
        rustup default "$channel"
        rustup target add "${{ matrix.target }}"
        rustup component add clippy llvm-tools-preview
    - uses: Swatinem/rust-cache@v2
      with:
        key: ${{ matrix.target }}

    - name: Download musl source
      run: ./ci/download-musl.sh
      shell: bash

    # Non-linux tests just use our raw script
    - name: Run locally
      if: matrix.os != 'ubuntu-latest' || contains(matrix.target, 'wasm')
      shell: bash
      run: ./ci/run.sh ${{ matrix.target }}

    # Otherwise we use our docker containers to run builds
    - name: Run in Docker
      if: matrix.os == 'ubuntu-latest' && !contains(matrix.target, 'wasm')
      run: |
        rustup target add x86_64-unknown-linux-musl
        cargo generate-lockfile && ./ci/run-docker.sh ${{ matrix.target }}

  clippy:
    name: Clippy
    runs-on: ubuntu-latest
    steps:
    - uses: actions/checkout@master
    - name: Install Rust
      run: |
        rustup update nightly --no-self-update
        rustup default nightly
        rustup component add clippy
    - uses: Swatinem/rust-cache@v2
    - name: Download musl source
      run: ./ci/download-musl.sh
    - run: |
        cargo clippy --all \
          --exclude cb \
          --features libm-test/build-musl,libm-test/test-multiprecision \
          --all-targets

  builtins:
    name: Check use with compiler-builtins
    runs-on: ubuntu-latest
    steps:
    - uses: actions/checkout@master
    - name: Install Rust
      run: rustup update nightly --no-self-update && rustup default nightly
    - uses: Swatinem/rust-cache@v2
    - run: cargo build -p cb

  benchmarks:
    name: Benchmarks
    runs-on: ubuntu-latest
    steps:
    - uses: actions/checkout@master
    - name: Install Rust
      run: rustup update nightly --no-self-update && rustup default nightly
    - uses: Swatinem/rust-cache@v2
    - name: Download musl source
      run: ./ci/download-musl.sh
    - run: cargo bench --all --features libm-test/short-benchmarks,libm-test/build-musl

  msrv:
    name: Check MSRV
    runs-on: ubuntu-latest
    env:
      RUSTFLAGS: # No need to check warnings on old MSRV, unset `-Dwarnings`
    steps:
    - uses: actions/checkout@master
    - run: |
        msrv="$(perl -ne 'print if s/rust-version\s*=\s*"(.*)"/\1/g' Cargo.toml)"
        echo "MSRV: $msrv"
        echo "MSRV=$msrv" >> "$GITHUB_ENV"
    - name: Install Rust
      run: rustup update "$MSRV" --no-self-update && rustup default "$MSRV"
    - uses: Swatinem/rust-cache@v2
    - run: cargo build -p libm

  rustfmt:
    name: Rustfmt
    runs-on: ubuntu-latest
    steps:
    - uses: actions/checkout@master
    - name: Install Rust
      run: |
        rustup update nightly --no-self-update
        rustup default nightly
        rustup component add rustfmt
    - run: cargo fmt -- --check

  success:
    needs:
      - test
      - builtins
      - benchmarks
      - msrv
      - rustfmt
    runs-on: ubuntu-latest
    # GitHub branch protection is exceedingly silly and treats "jobs skipped because a dependency
    # failed" as success. So we have to do some contortions to ensure the job fails if any of its
    # dependencies fails.
    if: always() # make sure this is never "skipped"
    steps:
      # Manually check the status of all dependencies. `if: failure()` does not work.
      - name: check if any dependency failed
        run: jq --exit-status 'all(.result == "success")' <<< '${{ toJson(needs) }}'