name: Android Build

on:
  workflow_dispatch:

concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true

jobs:
  generate-port-o2r:
    runs-on: ubuntu-22.04
    steps:
    - uses: actions/checkout@v4
      with:
        submodules: true
    - name: Install dependencies
      run: sudo apt-get install gcc g++ git cmake ninja-build lsb-release
    - name: ccache
      uses: hendrikmuhs/ccache-action@v1.2.13
      with:
        key: ${{ runner.os }}-o2r-ccache-${{ github.ref }}-${{ github.sha }}
        restore-keys: |
          ${{ runner.os }}-o2r-ccache-${{ github.ref }}
          ${{ runner.os }}-o2r-ccache-
    - name: Cache build folders
      uses: actions/cache@v4
      with:
        key: ${{ runner.os }}-o2r-build-${{ github.ref }}-${{ github.sha }}
        restore-keys: |
          ${{ runner.os }}-o2r-build-${{ github.ref }}
          ${{ runner.os }}-o2r-build-
        path: |
          torch/cmake-build-release
    - name: Generate spaghetti.o2r
      run: |
        export PATH="/usr/lib/ccache:/usr/local/opt/ccache/libexec:$PATH"
        make -C torch type=release -j3
        torch/cmake-build-release/torch pack assets spaghetti.o2r o2r
    - uses: actions/upload-artifact@v4
      with:
        name: spaghetti.o2r
        path: spaghetti.o2r
        retention-days: 1

  build-android:
    needs: generate-port-o2r
    runs-on: ubuntu-24.04
    steps:
    - uses: actions/checkout@v4
      with:
        submodules: 'recursive'
    - name: Patch Torch CMakeLists.txt to build as a library (not EXE)
      run: |
        sed -i 's/option(USE_STANDALONE "Build as a standalone executable" ON)/option(USE_STANDALONE "Build as a standalone executable" OFF)/' torch/CMakeLists.txt
    - name: Install dependencies
      run: sudo apt-get install -y ninja-build
    - name: Download spaghetti.o2r
      uses: actions/download-artifact@v4
      with:
        name: spaghetti.o2r
        path: android/app/src/main/assets 
    - name: Configure Gradle permissions
      run: chmod +x android/gradlew
    - name: Build Spaghetti Kart
      run: |
        cd android/
        ./gradlew assembleDebug -P elfBuildType=RelWithDebInfo
        mv app/build/outputs/apk/debug/app-debug.apk ../spaghettikart.apk
    - name: Upload APK artifact
      uses: actions/upload-artifact@v4
      with:
        name: spaghetti-kart-apk
        path: spaghettikart.apk