[ReactNative] Allow JS know its URL

React/Base/RCTBridge.h

@@ -88,6 +88,11 @@ static const char *__rct_import_##module##_##method##__ = #module"."#method;
                              url:(NSURL *)url
                       onComplete:(RCTJavaScriptCompleteBlock)onComplete;
 
+/**
+ * URL of the script that was loaded into the bridge.
+ */
+@property (nonatomic, copy, readonly) NSURL *bundleURL;
+
 @property (nonatomic, strong) Class executorClass;
 
 /**

React/Modules/RCTSourceCode.m

@@ -10,12 +10,15 @@
 #import "RCTSourceCode.h"
 
 #import "RCTAssert.h"
+#import "RCTBridge.h"
 #import "RCTUtils.h"
 
 @implementation RCTSourceCode
 
 RCT_EXPORT_MODULE()
 
+@synthesize bridge = _bridge;
+
 RCT_EXPORT_METHOD(getScriptText:(RCTResponseSenderBlock)successCallback
                   failureCallback:(RCTResponseSenderBlock)failureCallback)
 {
@@ -26,4 +29,10 @@ RCT_EXPORT_METHOD(getScriptText:(RCTResponseSenderBlock)successCallback
   }
 }
 
+- (NSDictionary *)constantsToExport
+{
+  NSString *URL = [self.bridge.bundleURL absoluteString] ?: @"";
+  return @{@"scriptURL": URL};
+}
+
 @end