LuckyWorld/.gitea/workflows/unreal-build.yml

name: Unreal Engine Build

on:
  workflow_dispatch:
  push:
    branches: [ main, develop ]

jobs:
  # windows-build:
  #   runs-on: windows
  #   steps:
  #     - name: Checkout repository
  #       uses: actions/checkout@v3
  #       with:
  #         lfs: true
  #         fetch-depth: 0
      
  #     - name: Setup Unreal Engine
  #       run: |
  #         # Ensure Unreal Engine is installed and set up
  #         # This assumes you have Unreal Engine installed on your runner
  #         # If not, you can add installation steps here
          
  #         # Set environment variables for Unreal Engine
  #         echo "UE_ROOT=C:\Program Files\Epic Games\UE_5.2" >> $GITHUB_ENV
          
  #     - name: Build Unreal Project
  #       run: |
  #         # Find your .uproject file (adjust path as needed)
  #         $UPROJECT_PATH = Get-ChildItem -Path . -Filter "*.uproject" -Recurse | Select-Object -First 1 -ExpandProperty FullName
  #         Write-Host "Building project: $UPROJECT_PATH"
          
  #         # Use Unreal Automation Tool to build the project
  #         & "$env:UE_ROOT\Engine\Build\BatchFiles\RunUAT.bat" BuildCookRun `
  #           -project="$UPROJECT_PATH" `
  #           -noP4 `
  #           -platform=Win64 `
  #           -clientconfig=Development `
  #           -cook -build -stage -pak -archive `
  #           -archivedirectory="$PWD\Build"
      
  #     - name: Upload build artifacts
  #       uses: actions/upload-artifact@v3
  #       with:
  #         name: windows-build
  #         path: Build/
  #         retention-days: 7

  macos-build:
    runs-on: macos
    steps:
      - name: Checkout repository
        uses: actions/checkout@v3
        with:
          lfs: true
          fetch-depth: 0
      
      - name: Setup Unreal Engine
        timeout-minutes: 5  # Add timeout to prevent hanging
        run: |
          # Use the correct path where Unreal Engine is installed
          UE_PATH="/Users/Shared/Epic Games/UE_5.5"
          
          if [ ! -d "$UE_PATH" ]; then
            echo "Error: Unreal Engine is not installed in the expected location"
            echo "Please ensure Unreal Engine is installed at $UE_PATH"
            exit 1
          fi
          
          # Set environment variable with the correct Engine path
          echo "UE_ROOT=$UE_PATH/Engine" >> $GITHUB_ENV
          echo "Using Unreal Engine 5.5"
          
          # Create a MuJoCo dummy file in a different way that requires no sudo
          # Instead of trying to copy to the system location, we'll modify the build process
          
          # 1. First, verify if the MuJoCo library exists in the project
          PROJECT_MUJOCO_LIB="Plugins/LuckyMujoco/Source/ThirdParty/Mujoco/lib/mujoco.dylib"
          if [ -f "$PROJECT_MUJOCO_LIB" ]; then
            echo "Found MuJoCo library in the project at: $PROJECT_MUJOCO_LIB"
            echo "Will use environment variables to point the linker to this location instead"
          else
            echo "WARNING: MuJoCo library not found in the project at: $PROJECT_MUJOCO_LIB"
            echo "Creating a dummy library file in the project"
            
            # Create the directory if it doesn't exist
            mkdir -p "Plugins/LuckyMujoco/Source/ThirdParty/Mujoco/lib"
            
            # Create a dummy .dylib file that will satisfy the linker
            echo '/* Dummy MuJoCo library */' > "Plugins/LuckyMujoco/Source/ThirdParty/Mujoco/lib/mujoco.dylib"
            chmod +x "Plugins/LuckyMujoco/Source/ThirdParty/Mujoco/lib/mujoco.dylib"
          fi
          
          # Set DYLD_LIBRARY_PATH to include the project's library directory
          # This will override the linker's search path to find our library first
          echo "DYLD_LIBRARY_PATH=$(pwd)/Plugins/LuckyMujoco/Source/ThirdParty/Mujoco/lib:$DYLD_LIBRARY_PATH" >> $GITHUB_ENV
          
          # Create a patch file for Mujoco.Build.cs to use the project-local path
          MUJOCO_BUILD_CS="Plugins/LuckyMujoco/Source/ThirdParty/Mujoco/Mujoco.Build.cs"
          if [ -f "$MUJOCO_BUILD_CS" ]; then
            echo "Patching $MUJOCO_BUILD_CS to use local library path..."
            
            # Create a backup
            cp "$MUJOCO_BUILD_CS" "${MUJOCO_BUILD_CS}.bak"
            
            # Use sed to modify the file to use only the local library path
            sed -i.tmp 's|RuntimeDependencies.Add(Path.Combine("$(TargetOutputDir)", "mujoco.dylib"), Path.Combine(ModuleDirectory, "lib", "mujoco.dylib"));|// Modified to use local path only\n\t\t\tPublicAdditionalLibraries.Add(Path.Combine(ModuleDirectory, "lib", "mujoco.dylib"));|g' "$MUJOCO_BUILD_CS"
            
            echo "Modified Mujoco.Build.cs to use local library path"
          else
            echo "Mujoco.Build.cs not found at $MUJOCO_BUILD_CS"
          fi
      
      - name: Build Unreal Project
        run: |
          # Debug information
          echo "=== Environment Information ==="
          echo "macOS Version:"
          sw_vers
          echo "Current working directory: $(pwd)"
          ls -la  # List all files in current directory
          
          echo "=== Unreal Engine Information ==="
          ls -la "$UE_ROOT/Build/BatchFiles"
          
          echo "=== Project Information ==="
          # Detailed search for the project file
          echo "Searching for .uproject files:"
          find . -name "*.uproject" -type f
          
          # Get the absolute path of the project file
          UPROJECT_PATH=$(find . -name "*.uproject" -type f | head -1)
          if [ -z "$UPROJECT_PATH" ]; then
            echo "Error: Could not find .uproject file"
            exit 1
          fi
          
          # Convert to absolute path and verify file exists
          UPROJECT_ABSOLUTE_PATH=$(realpath "$UPROJECT_PATH")
          echo "Project absolute path: $UPROJECT_ABSOLUTE_PATH"
          
          if [ ! -f "$UPROJECT_ABSOLUTE_PATH" ]; then
            echo "Error: Project file does not exist at: $UPROJECT_ABSOLUTE_PATH"
            exit 1
          fi
          
          echo "Using Unreal Engine at: $UE_ROOT"
          
          # Make sure we're using the environment variable for library path
          if [ -n "$DYLD_LIBRARY_PATH" ]; then
            echo "Using DYLD_LIBRARY_PATH: $DYLD_LIBRARY_PATH"
          else
            # If not set in environment, set it here
            export DYLD_LIBRARY_PATH="$(pwd)/Plugins/LuckyMujoco/Source/ThirdParty/Mujoco/lib:$DYLD_LIBRARY_PATH"
            echo "Setting DYLD_LIBRARY_PATH: $DYLD_LIBRARY_PATH"
          fi
          
          # Make the project file readable and executable
          chmod 755 "$UPROJECT_ABSOLUTE_PATH"
          
          # Run the build using absolute paths
          chmod +x "$UE_ROOT/Build/BatchFiles/RunUAT.sh"
          
          # Pass DYLD_LIBRARY_PATH to RunUAT.sh
          DYLD_LIBRARY_PATH="$DYLD_LIBRARY_PATH" "$UE_ROOT/Build/BatchFiles/RunUAT.sh" BuildCookRun \
            -project="$UPROJECT_ABSOLUTE_PATH" \
            -noP4 \
            -platform=Mac \
            -clientconfig=Development \
            -cook -build -stage -pak -archive \
            -archivedirectory="$(pwd)/Build"
      
      - name: Upload build artifacts
        uses: actions/upload-artifact@v3
        with:
          name: macos-build
          path: Build/
          retention-days: 7