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                                                                                                                                    
          # Configure sources for ARM64 packages - all ARM64 packages come from ports.ubuntu.com                                                                                
          sudo tee /etc/apt/sources.list.d/arm64.list > /dev/null <<EOF                                                                                                         
          deb [arch=arm64] http://ports.ubuntu.com/ubuntu-ports jammy main restricted universe multiverse                                                                       
          deb [arch=arm64] http://ports.ubuntu.com/ubuntu-ports jammy-updates main restricted universe multiverse                                                               
          deb [arch=arm64] http://ports.ubuntu.com/ubuntu-ports jammy-backports main restricted universe multiverse                                                             
          deb [arch=arm64] http://ports.ubuntu.com/ubuntu-ports jammy-security main restricted universe multiverse                                                              
          EOF                                                                                                                                                                   
          # Modify existing sources to exclude arm64 architecture                                                                                                               
          sudo sed -i 's/^deb /deb [arch=amd64] /' /etc/apt/sources.list                                                                                                        
          sudo apt-get update -y                                                                                                                                                
          # Install build tools and cross-compilation libraries for Raspberry Pi 5                                                                                              
          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