Merge pull request #171 from Unity-Technologies/zgh/build_scripts

revert libUIWidgets.so.meta

com.unity.uiwidgets/Runtime/Plugins/Android/libUIWidgets.so.meta

   validateReferences: 1
   platformData:
   - first:
-      Any: 
+      : Any
+    second:
+      enabled: 0
+      settings:
+        Exclude Android: 0
+        Exclude Editor: 1
+        Exclude Linux64: 1
+        Exclude OSXUniversal: 1
+        Exclude Win: 1
+        Exclude Win64: 1
+        Exclude iOS: 1
+  - first:
+      Android: Android
+      settings:
+        CPU: ARMv7
+  - first:
+      Any: 
+    second:
+      enabled: 0
       settings: {}
   - first:
       Editor: Editor
+        CPU: AnyCPU
+        OS: AnyOS
+  - first:
+      Standalone: Linux64
+    second:
+      enabled: 0
+      settings:
+        CPU: None
+  - first:
+      Standalone: OSXUniversal
+    second:
+      enabled: 0
+      settings:
+        CPU: None
+  - first:
+      Standalone: Win
+    second:
+      enabled: 0
+      settings:
+        CPU: None
+  - first:
+      Standalone: Win64
+    second:
+      enabled: 0
+      settings:
+        CPU: None
+  - first:
+      iPhone: iOS
+    second:
+      enabled: 0
+      settings:
+        AddToEmbeddedBinaries: false
+        CPU: AnyCPU
+        CompileFlags: 
+        FrameworkDependencies: 
   userData: 
   assetBundleName: 
   assetBundleVariant: 

engine/Scripts/lib_build.py

     gn_params=gn_params + " " + optimize
 
 def set_env_verb():
+    global platform
     global flutter_root_path
     flutter_root_path = os.getenv('FLUTTER_ROOT_PATH', 'null')
     if flutter_root_path == 'null':
         if path.startswith(engine_path):
             print("This environment variable has been set, skip")
             return
-    os.environ["PATH"] = engine_path + "/depot_tools;" + os.environ["PATH"]
+    if platform == "windows":
+        os.environ["PATH"] = engine_path + "/depot_tools;" + os.environ["PATH"]
+    else:
+        os.environ["PATH"] = engine_path + "/depot_tools:" + os.environ["PATH"]
 
 def get_depot_tools():
     print("\nGetting Depot Tools...")