rust.yml

name: Rust

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

env:
  CARGO_TERM_COLOR: always

jobs:
  build_and_test:
    runs-on: ["${{ matrix.distro }}"]
    name: Build on ${{ matrix.distro }} ${{ matrix.arch }}

    strategy:
      matrix:
        include:
          - arch: x64
            distro: ubuntu-latest
    steps:
      - name: Checkout source code
        uses: actions/checkout@v2

      - name: Cache LLVM
        id: cache-llvm
        uses: actions/cache@v2
        with: 
          path: ./llvm
          key: llvm-18

      - name: Install LLVM
        uses: KyleMayes/install-llvm-action@abb6cec0ec431e834bc5e5090ea39a2d1d63a4c6 # v2.0.3
        with:
          version: "18.1.4"
          cached: ${{ steps.cache-llvm.outputs.cache-hit }}

      - name: Install Rust nightly
        run: |
          rustup toolchain install nightly
          rustup component add clippy --toolchain nightly
          rustup component add rustfmt --toolchain nightly
          rustup default nightly

      - name: Dependency caching
        uses: Swatinem/rust-cache@v2

      - name: LLVM location
        # @@Dumbness: we need to install `libtinfo5` because of:
        # - https://github.com/hash-org/hashc/actions/runs/9634436024/job/26570084536
        run: |
          sudo apt install -y libtinfo5
          echo $LLVM_PATH
          $LLVM_PATH/bin/llvm-config --version
      
      - name: Run tests
        run: "LLVM_SYS_181_PREFIX=$LLVM_PATH cargo test --all --verbose"

      - name: Run clippy
        run: "LLVM_SYS_181_PREFIX=$LLVM_PATH cargo clippy --all -- -D warnings"

      - name: Check formatting
        run: "cargo fmt --all -- --check"