Fix CI workflow with simple Linux support and debugging

- Replaced complex build-all-platforms.yml with simple matrix approach
- Added macOS + Linux matrix to existing ci.yml workflow
- Added extensive debugging to identify Linux Swift build issues
- Updated commit logic to handle both .dylib and .so files
- Enhanced build.sh with verbose logging and file verification
- Uses dlibs/ structure for proper organization

This approach builds on the working macOS CI instead of starting from scratch.

Author: miriamkw

.github/workflows/build-all-platforms.yml

@@ -16,7 +16,10 @@ on:
 # Define the jobs to run in the workflow
 jobs:
   build-and-test:
-    runs-on: macos-latest  # Use macOS for Swift and iOS-specific dependencies
+    strategy:
+      matrix:
+        os: [macos-latest, ubuntu-latest]
+    runs-on: ${{ matrix.os }}
 
     steps:
       - name: Checkout code
@@ -29,8 +32,24 @@ jobs:
 
       - name: Set up Swift
         run: |
-          sudo xcode-select --switch /Applications/Xcode.app/Contents/Developer
-          sudo xcodebuild -runFirstLaunch
+          if [[ "${{ matrix.os }}" == "macos-latest" ]]; then
+            sudo xcode-select --switch /Applications/Xcode.app/Contents/Developer
+            sudo xcodebuild -runFirstLaunch
+          else
+            # Install Swift for Linux with debugging
+            echo "Installing Swift for Linux..."
+            wget https://download.swift.org/swift-6.0.3-release/ubuntu2404/swift-6.0.3-RELEASE/swift-6.0.3-RELEASE-ubuntu24.04.tar.gz
+            tar xzf swift-6.0.3-RELEASE-ubuntu24.04.tar.gz
+            sudo mv swift-6.0.3-RELEASE-ubuntu24.04 /usr/local/swift
+            echo "/usr/local/swift/usr/bin" >> $GITHUB_PATH
+            sudo apt update
+            sudo apt install -y build-essential libc6-dev
+            
+            # Verify Swift installation
+            echo "Verifying Swift installation:"
+            ls -la /usr/local/swift/usr/bin/
+            /usr/local/swift/usr/bin/swift --version
+          fi
 
       - name: Install dependencies
         run: |
@@ -41,6 +60,21 @@ jobs:
         run: |
           chmod +x build.sh
           ./build.sh
+          
+          # Debug: Check what files were actually generated
+          echo "Files in .build/release/:"
+          ls -la .build/release/ || echo "No .build/release directory"
+          
+          echo "Files in loop_to_python_api/dlibs/:"
+          ls -la loop_to_python_api/dlibs/ || echo "No dlibs directory"
+          
+          if [[ "${{ matrix.os }}" == "macos-latest" ]]; then
+            echo "macOS library file:"
+            ls -la loop_to_python_api/dlibs/macos/ || echo "No macOS dlibs"
+          else
+            echo "Linux library file:"
+            ls -la loop_to_python_api/dlibs/linux/ || echo "No Linux dlibs"
+          fi
 
       - name: Run tests
         run: |
@@ -64,9 +98,14 @@ jobs:
           git fetch origin
           git checkout -B $TARGET_BRANCH origin/$TARGET_BRANCH
           
-          # Add and commit the .dylib file to new dlibs structure
-          git add ./loop_to_python_api/dlibs/macos/libLoopAlgorithmToPython.dylib
-          git commit -m "Add generated libLoopAlgorithmToPython.dylib" || echo "No changes to commit"
+          # Add and commit the library file for the appropriate platform
+          if [[ "${{ matrix.os }}" == "macos-latest" ]]; then
+            git add ./loop_to_python_api/dlibs/macos/libLoopAlgorithmToPython.dylib
+            git commit -m "Add generated libLoopAlgorithmToPython.dylib" || echo "No changes to commit"
+          else
+            git add ./loop_to_python_api/dlibs/linux/libLoopAlgorithmToPython.so
+            git commit -m "Add generated libLoopAlgorithmToPython.so" || echo "No changes to commit"
+          fi
           
           # Push to the target branch
           git push origin $TARGET_BRANCH

.github/workflows/ci.yml

@@ -5,7 +5,11 @@ echo "Building dynamic c library from Swift code..."
 # Run the Swift package commands to build the dynamic c library
 swift package clean
 swift package update
-swift build --configuration release
+echo "Building Swift package..."
+swift build --configuration release --verbose
+
+echo "Build completed. Files in .build/release/:"
+ls -la .build/release/ 2>/dev/null || echo "No .build/release directory found"
 
 # Detect the operating system and set the library paths
 if [[ "$OSTYPE" == "darwin"* ]]; then