Return the real transferred files when transferDirectory of device fs is called

When uploading files on devices/emulators, we are executing either `transferDirectory` or `transferFiles` methods of the specific device instance.
However for Android devices, the transferDirectory method has some logic to transfer only modified files (based on shasums from previous execution). So it doesn't really transfer the directory, but just several files.
For LiveSync purposes it is important to know which are the tranferred files, so change the return type of `transferDirectory` method to return the exact files that we've sent to device.

Author: rosen-vladimirov

definitions/mobile.d.ts

@@ -296,7 +296,7 @@ declare module Mobile {
 		putFile(localFilePath: string, deviceFilePath: string, appIdentifier: string): Promise<void>;
 		deleteFile?(deviceFilePath: string, appIdentifier: string): Promise<void>;
 		transferFiles(deviceAppData: Mobile.IDeviceAppData, localToDevicePaths: Mobile.ILocalToDevicePathData[]): Promise<void>;
-		transferDirectory(deviceAppData: Mobile.IDeviceAppData, localToDevicePaths: Mobile.ILocalToDevicePathData[], projectFilesPath: string): Promise<void>;
+		transferDirectory(deviceAppData: Mobile.IDeviceAppData, localToDevicePaths: Mobile.ILocalToDevicePathData[], projectFilesPath: string): Promise<Mobile.ILocalToDevicePathData[]>;
 		transferFile?(localFilePath: string, deviceFilePath: string): Promise<void>;
 		createFileOnDevice?(deviceFilePath: string, fileContent: string): Promise<void>;
 	}

mobile/android/android-device-file-system.ts

@@ -81,7 +81,7 @@ export class AndroidDeviceFileSystem implements Mobile.IDeviceFileSystem {
 		}
 	}
 
-	public async transferDirectory(deviceAppData: Mobile.IDeviceAppData, localToDevicePaths: Mobile.ILocalToDevicePathData[], projectFilesPath: string): Promise<void> {
+	public async transferDirectory(deviceAppData: Mobile.IDeviceAppData, localToDevicePaths: Mobile.ILocalToDevicePathData[], projectFilesPath: string): Promise<Mobile.ILocalToDevicePathData[]> {
 		let devicePaths: string[] = [],
 			currentShasums: IStringDictionary = {};
 
@@ -102,28 +102,27 @@ export class AndroidDeviceFileSystem implements Mobile.IDeviceFileSystem {
 
 		let deviceHashService = this.getDeviceHashService(deviceAppData.appIdentifier);
 		let filesToChmodOnDevice: string[] = devicePaths;
-		if (this.$options.force) {
+		let tranferredFiles: Mobile.ILocalToDevicePathData[] = [];
+		let oldShasums = await deviceHashService.getShasumsFromDevice();
+		if (this.$options.force || !oldShasums) {
 			await this.adb.executeShellCommand(["rm", "-rf", deviceHashService.hashFileDevicePath]);
 			await this.adb.executeCommand(["push", projectFilesPath, await deviceAppData.getDeviceProjectRootPath()]);
+			tranferredFiles = localToDevicePaths;
 		} else {
 			// Create or update file hashes on device
-			let oldShasums = await deviceHashService.getShasumsFromDevice();
-			if (oldShasums) {
-				let changedShasums: any = _.omitBy(currentShasums, (hash: string, pathToFile: string) => !!_.find(oldShasums, (oldHash: string, oldPath: string) => pathToFile === oldPath && hash === oldHash));
-				this.$logger.trace("Changed file hashes are:", changedShasums);
-				filesToChmodOnDevice = [];
-				await Promise.all(
-					_(changedShasums)
-						.map((hash: string, filePath: string) => _.find(localToDevicePaths, ldp => ldp.getLocalPath() === filePath))
-						.map(localToDevicePathData => {
-							filesToChmodOnDevice.push(`"${localToDevicePathData.getDevicePath()}"`);
-							return this.transferFile(localToDevicePathData.getLocalPath(), localToDevicePathData.getDevicePath());
-						})
-						.value()
-				);
-			} else {
-				await this.adb.executeCommand(["push", projectFilesPath, await deviceAppData.getDeviceProjectRootPath()]);
-			}
+			let changedShasums: any = _.omitBy(currentShasums, (hash: string, pathToFile: string) => !!_.find(oldShasums, (oldHash: string, oldPath: string) => pathToFile === oldPath && hash === oldHash));
+			this.$logger.trace("Changed file hashes are:", changedShasums);
+			filesToChmodOnDevice = [];
+			await Promise.all(
+				_(changedShasums)
+					.map((hash: string, filePath: string) => _.find(localToDevicePaths, ldp => ldp.getLocalPath() === filePath))
+					.map(localToDevicePathData => {
+						tranferredFiles.push(localToDevicePathData);
+						filesToChmodOnDevice.push(`"${localToDevicePathData.getDevicePath()}"`);
+						return this.transferFile(localToDevicePathData.getLocalPath(), localToDevicePathData.getDevicePath());
+					})
+					.value()
+			);
 		}
 
 		if (filesToChmodOnDevice.length) {
@@ -132,6 +131,8 @@ export class AndroidDeviceFileSystem implements Mobile.IDeviceFileSystem {
 		}
 
 		await deviceHashService.uploadHashFileToDevice(currentShasums);
+
+		return tranferredFiles;
 	}
 
 	public async transferFile(localPath: string, devicePath: string): Promise<void> {

mobile/ios/device/ios-device-file-system.ts

@@ -61,8 +61,9 @@ export class IOSDeviceFileSystem implements Mobile.IDeviceFileSystem {
 		}]);
 	}
 
-	public async transferDirectory(deviceAppData: Mobile.IDeviceAppData, localToDevicePaths: Mobile.ILocalToDevicePathData[], projectFilesPath: string): Promise<void> {
-		return this.transferFiles(deviceAppData, localToDevicePaths);
+	public async transferDirectory(deviceAppData: Mobile.IDeviceAppData, localToDevicePaths: Mobile.ILocalToDevicePathData[], projectFilesPath: string): Promise<Mobile.ILocalToDevicePathData[]> {
+		await this.transferFiles(deviceAppData, localToDevicePaths);
+		return localToDevicePaths;
 	}
 
 	private async uploadFilesCore(filesToUpload: IOSDeviceLib.IUploadFilesData[]): Promise<void> {

mobile/ios/simulator/ios-simulator-file-system.ts

@@ -30,11 +30,12 @@ export class IOSSimulatorFileSystem implements Mobile.IDeviceFileSystem {
 			));
 	}
 
-	public async transferDirectory(deviceAppData: Mobile.IDeviceAppData, localToDevicePaths: Mobile.ILocalToDevicePathData[], projectFilesPath: string): Promise<void> {
+	public async transferDirectory(deviceAppData: Mobile.IDeviceAppData, localToDevicePaths: Mobile.ILocalToDevicePathData[], projectFilesPath: string): Promise<Mobile.ILocalToDevicePathData[]> {
 		let destinationPath = await deviceAppData.getDeviceProjectRootPath();
 		this.$logger.trace(`Transferring from ${projectFilesPath} to ${destinationPath}`);
 		let sourcePath = path.join(projectFilesPath, "*");
-		return shelljs.cp("-Rf", sourcePath, destinationPath);
+		shelljs.cp("-Rf", sourcePath, destinationPath);
+		return localToDevicePaths;
 	}
 
 	public async transferFile(localFilePath: string, deviceFilePath: string): Promise<void> {