name: CI

on:
  push:
    branches:
      - main
  pull_request:

jobs:
  ci:
    name: ${{ matrix.os }}
    runs-on: ${{ matrix.os }}
    strategy:
      fail-fast: false
      matrix:
        os: [ubuntu-latest, macos-latest]

    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Install Rust toolchain
        uses: dtolnay/rust-toolchain@stable
        with:
          components: rustfmt

      - name: Cache cargo
        uses: Swatinem/rust-cache@v2

      # cpal links against ALSA on Linux (macOS uses CoreAudio, no dev pkg needed).
      # protoc: tonic-build regenerates the gRPC API from proto/ at build time.
      - name: Install ALSA dev headers and protoc
        if: startsWith(matrix.os, 'ubuntu')
        run: |
          sudo apt-get update
          sudo apt-get install -y libasound2-dev pkg-config protobuf-compiler

      - name: Install protoc
        if: startsWith(matrix.os, 'macos')
        run: brew install protobuf

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

      # Release profile throughout: the real-time DSP is unusably slow in
      # debug, and it keeps the cache shared between test and build.
      - name: Test
        run: cargo test --release --locked

      - name: Build
        run: cargo build --release --locked --bin equalizer