Merge pull request tidev#5641 from pec1985/timob-16004

[TiMOB-16004] iOS: Expose current file path and directory path to commonjs module scope

iphone/Classes/KrollBridge.m

@@ -29,7 +29,7 @@
 extern NSString * const TI_APPLICATION_GUID;
 
 NSString * TitaniumModuleRequireFormat = @"(function(exports){"
-		"var __OXP=exports;var module={'exports':exports};%@;\n"
+		"var __OXP=exports;var module={'exports':exports};var __dirname=\"%@\";var __filename=\"%@\";\n%@;\n"
 		"if(module.exports !== __OXP){return module.exports;}"
 		"return exports;})({})";
 
@@ -723,7 +723,25 @@ - (id)krollObjectForProxy:(id)proxy
 
 -(id)loadCommonJSModule:(NSString*)code withSourceURL:(NSURL *)sourceURL
 {
-	NSString *js = [[NSString alloc] initWithFormat:TitaniumModuleRequireFormat,code];
+	// This takes care of resolving paths like `../../foo.js`
+	sourceURL = [NSURL fileURLWithPath:[[sourceURL path] stringByStandardizingPath]];
+
+	// Get the relative path to the Resources directory
+	NSString *relativePath = [sourceURL path];
+	relativePath = [relativePath stringByReplacingOccurrencesOfString:[[[NSBundle mainBundle] resourceURL] path] withString:@""];
+	relativePath = [[relativePath substringFromIndex:1] stringByDeletingLastPathComponent];
+
+	NSString *dirname = [relativePath length] == 0 ? @"." : relativePath;
+	/*
+	 * This is for parity with android, if the file is located in the Resources, then __dirname returns "."
+	 * otherwise the __dirname returns the folder names separated by "/"
+	 * for example:
+	 *      "/Resources/constants.js"           __dirname = "."
+	 *      "/Resources/views/login/window.js"  __dirname = "views/login"
+	 */
+
+	NSString *filename = [sourceURL lastPathComponent];
+	NSString *js = [[NSString alloc] initWithFormat:TitaniumModuleRequireFormat, dirname, filename,code];
 
 	/* This most likely should be integrated with normal code flow, but to
 	 * minimize impact until a in-depth reconsideration of KrollContext can be