fix: Android CI not working

Author: Losses

android/build.sh

@@ -96,6 +96,45 @@ EOF
         echo "----------------------------------------"
     fi
 
+    if [ "$CIRCLECI" = "true" ]; then
+        echo "=== Preparing Writable Flutter Gradle Tools for Nix Build ==="
+        
+        # Check if Flutter is present before using it
+        if ! command -v flutter &> /dev/null; then
+            echo "ERROR: Flutter command not found, cannot determine SDK path."
+            exit 1
+        fi
+        
+        # Reliably get the Flutter SDK path from the flutter tool itself
+        FLUTTER_SDK_PATH=$(flutter --version | grep 'Flutter version' | sed 's/.* at //')
+        if [ -z "$FLUTTER_SDK_PATH" ]; then
+            echo "ERROR: Could not determine Flutter SDK path."
+            exit 1
+        fi
+        echo "Found Flutter SDK at: $FLUTTER_SDK_PATH"
+
+        # Define a writable path within the workspace
+        WRITABLE_FLUTTER_TOOLS_GRADLE_PATH="$WORK_DIR/writable_flutter_tools_gradle"
+        mkdir -p "$WRITABLE_FLUTTER_TOOLS_GRADLE_PATH"
+
+        # Copy the Flutter Gradle tools to the writable location
+        echo "Copying Flutter Gradle tools to $WRITABLE_FLUTTER_TOOLS_GRADLE_PATH..."
+        cp -rL "$FLUTTER_SDK_PATH/packages/flutter_tools/gradle/." "$WRITABLE_FLUTTER_TOOLS_GRADLE_PATH/"
+
+        # Add a Gradle property pointing to this new directory.
+        # We use flutterToolsGradleDir to match the property in settings.gradle
+        export GRADLE_OPTS="$GRADLE_OPTS -PflutterToolsGradleDir=$WRITABLE_FLUTTER_TOOLS_GRADLE_PATH"
+        
+        # Re-apply to FLUTTER_GRADLE_OPTS for CircleCI environment
+        if [ "$CIRCLECI" = "true" ]; then
+            export FLUTTER_GRADLE_OPTS="$GRADLE_OPTS"
+        fi
+
+        echo "Writable Flutter Gradle tools prepared."
+        echo "Updated GRADLE_OPTS: $GRADLE_OPTS"
+        echo "============================================================"
+    fi
+
     # Create a local gradle wrapper properties to ensure consistent Gradle version
     mkdir -p "$WORK_DIR/gradle/wrapper"
     if [ ! -f "$WORK_DIR/gradle/wrapper/gradle-wrapper.properties" ]; then

android/settings.gradle

@@ -1,13 +1,27 @@
 pluginManagement {
     def flutterSdkPath = {
         def properties = new Properties()
-        file("local.properties").withInputStream { properties.load(it) }
-        def flutterSdkPath = properties.getProperty("flutter.sdk")
-        assert flutterSdkPath != null, "flutter.sdk not set in local.properties"
-        return flutterSdkPath
+        // Make reading local.properties safer for CI environments
+        def localPropertiesFile = new File(rootDir, "local.properties")
+        if (localPropertiesFile.exists()) {
+            localPropertiesFile.withInputStream { properties.load(it) }
+        }
+        def sdkPath = properties.getProperty("flutter.sdk")
+        assert sdkPath != null, "flutter.sdk not set in local.properties. Please create this file."
+        return sdkPath
     }()
 
-    includeBuild("$flutterSdkPath/packages/flutter_tools/gradle")
+    def flutterToolsGradlePath
+    // In CI/Nix, we pass a property pointing to a writable copy.
+    if (settings.hasProperty('flutterToolsGradleDir')) {
+        flutterToolsGradlePath = settings['flutterToolsGradleDir']
+    } else {
+        // For local development, use the default path inside the SDK.
+        flutterToolsGradlePath = new File(flutterSdkPath, 'packages/flutter_tools/gradle')
+    }
+    
+    // Use the determined path
+    includeBuild(flutterToolsGradlePath)
 
     repositories {
         google()