Add package name / bundle ID to bundle URL in development

Summary:
Adds the package name (Android) / bundle ID (iOS) as a new URL parameter named `app` in the bundle URL. This currently has no effect on Metro, which will ignore it for bundling / caching purposes.

Changelog: [General] - Add package name / bundle ID to bundle URL in development

Reviewed By: cpojer

Differential Revision: D21429764

fbshipit-source-id: 394fe50dba72219f7594ebeac9486a8264a836a6

Author: motiz88

RNTester/RNTesterUnitTests/RCTBundleURLProviderTests.m

@@ -20,12 +20,12 @@
 
 static NSURL *localhostBundleURL()
 {
-  return [NSURL URLWithString:[NSString stringWithFormat:@"http://localhost:8081/%@.bundle?platform=ios&dev=true&minify=false", testFile]];
+  return [NSURL URLWithString:[NSString stringWithFormat:@"http://localhost:8081/%@.bundle?platform=ios&dev=true&minify=false&app=com.apple.dt.xctest.tool", testFile]];
 }
 
 static NSURL *ipBundleURL()
 {
-  return [NSURL URLWithString:[NSString stringWithFormat:@"http://192.168.1.1:8081/%@.bundle?platform=ios&dev=true&minify=false", testFile]];
+  return [NSURL URLWithString:[NSString stringWithFormat:@"http://192.168.1.1:8081/%@.bundle?platform=ios&dev=true&minify=false&app=com.apple.dt.xctest.tool", testFile]];
 }
 
 @implementation NSBundle (RCTBundleURLProviderTests)

React/Base/RCTBundleURLProvider.m

@@ -187,6 +187,10 @@ + (NSURL *)jsBundleURLForBundleRoot:(NSString *)bundleRoot
   NSString *query = [NSString stringWithFormat:@"platform=ios&dev=%@&minify=%@",
                                                enableDev ? @"true" : @"false",
                                                enableMinification ? @"true" : @"false"];
+  NSString *bundleID = [[NSBundle mainBundle] objectForInfoDictionaryKey:(NSString *)kCFBundleIdentifierKey];
+  if (bundleID) {
+    query = [NSString stringWithFormat:@"%@&app=%@", query, bundleID];
+  }
   return [[self class] resourceURLForResourcePath:path packagerHost:packagerHost query:query];
 }
 

ReactAndroid/src/main/java/com/facebook/react/devsupport/DevServerHelper.java

@@ -421,12 +421,13 @@ private boolean getJSMinifyMode() {
   private String createBundleURL(String mainModuleID, BundleType type, String host) {
     return String.format(
         Locale.US,
-        "http://%s/%s.%s?platform=android&dev=%s&minify=%s",
+        "http://%s/%s.%s?platform=android&dev=%s&minify=%s&app=%s",
         host,
         mainModuleID,
         type.typeID(),
         getDevMode(),
-        getJSMinifyMode());
+        getJSMinifyMode(),
+        mPackageName);
   }
 
   private String createBundleURL(String mainModuleID, BundleType type) {