name: Build for Raspberry Pi

on:
  push:
    branches:
      - main
  pull_request:
    branches:
      - main

env:
  CARGO_TERM_COLOR: always
  # Target for 64-bit Raspberry Pi (Raspberry Pi OS)
  RUST_TARGET: aarch64-unknown-linux-gnu

jobs:
  build:
    name: Build for aarch64
    runs-on: ubuntu-22.04
    steps:
      - uses: actions/checkout@v4

      - name: Install Rust toolchain
        uses: dtolnay/rust-toolchain@stable
        with:
          targets: ${{ env.RUST_TARGET }}

      - name: Install cross-compilation dependencies
        run: |
          sudo dpkg --add-architecture arm64
          # Add arm64-specific sources to avoid 404 errors on security repos
          echo "deb [arch=arm64] http://ports.ubuntu.com/ubuntu-ports jammy main restricted universe multiverse" | sudo tee /etc/apt/sources.list.d/arm64.list
          echo "deb [arch=arm64] http://ports.ubuntu.com/ubuntu-ports jammy-updates main restricted universe multiverse" | sudo tee -a /etc/apt/sources.list.d/arm64.list
          echo "deb [arch=arm64] http://ports.ubuntu.com/ubuntu-ports jammy-security main restricted universe multiverse" | sudo tee -a /etc/apt/sources.list.d/arm64.list
          sudo apt-get update -y
          # Install build tools and cross-compilation libraries.
          # cmake is included as it's in setup.sh and might be needed by a dependency.
          # The :arm64 suffix is required for cross-compilation.
          sudo apt-get install -y gcc-aarch64-linux-gnu libudev-dev:arm64 cmake

      - name: Build release binary
        run: cargo build --release --target ${{ env.RUST_TARGET }}
        env:
          # Set linker for the target
          CARGO_TARGET_AARCH64_UNKNOWN_LINUX_GNU_LINKER: aarch64-linux-gnu-gcc
          # Configure pkg-config for cross-compilation
          PKG_CONFIG_ALLOW_CROSS: 1
          PKG_CONFIG_PATH: /usr/lib/aarch64-linux-gnu/pkgconfig
          # Add library path for the cross-compiler's linker
          RUSTFLAGS: -L/usr/lib/aarch64-linux-gnu

      - name: Upload artifact
        uses: actions/upload-artifact@v4
        with:
          name: timeturner-aarch64
          path: target/${{ env.RUST_TARGET }}/release/timeturner