Start livesync watcher before preparing the project

lib/bootstrap.ts

@@ -165,3 +165,5 @@ $injector.require("nativeScriptCloudExtensionService", "./services/nativescript-
 $injector.requireCommand("resources|generate|icons", "./commands/generate-assets");
 $injector.requireCommand("resources|generate|splashes", "./commands/generate-assets");
 $injector.requirePublic("assetsGenerationService", "./services/assets-generation/assets-generation-service");
+
+$injector.require("filesHashService", "./services/files-hash-service");

lib/definitions/files-hash-service.d.ts

@@ -0,0 +1,4 @@
+interface IFilesHashService {
+	generateHashes(files: string[]): Promise<IStringDictionary>;
+	getChanges(files: string[], oldHashes: IStringDictionary): Promise<IStringDictionary>;
+}

lib/definitions/platform.d.ts

@@ -88,7 +88,7 @@ interface IPlatformService extends IBuildPlatformAction, NodeJS.EventEmitter {
 	 * @param {IShouldPrepareInfo} shouldPrepareInfo Options needed to decide whether to prepare.
 	 * @returns {Promise<boolean>} true indicates that the project should be prepared.
 	 */
-	shouldPrepare(shouldPrepareInfo: IShouldPrepareInfo): Promise<boolean>
+	shouldPrepare(shouldPrepareInfo: IShouldPrepareInfo): Promise<boolean>;
 
 	/**
 	 * Installs the application on specified device.
@@ -213,7 +213,7 @@ interface IPlatformService extends IBuildPlatformAction, NodeJS.EventEmitter {
 	 * @param {string} buildInfoFileDirname The directory where the build file should be written to.
 	 * @returns {void}
 	 */
-	saveBuildInfoFile(platform: string, projectDir: string, buildInfoFileDirname: string): void
+	saveBuildInfoFile(platform: string, projectDir: string, buildInfoFileDirname: string): void;
 }
 
 interface IPlatformOptions extends IPlatformSpecificData, ICreateProjectOptions { }

lib/definitions/project-changes.d.ts

@@ -1,4 +1,8 @@
-interface IPrepareInfo extends IAddedNativePlatform {
+interface IAppFilesHashes {
+	appFilesHashes: IStringDictionary;
+}
+
+interface IPrepareInfo extends IAddedNativePlatform, IAppFilesHashes {
 	time: string;
 	bundle: boolean;
 	release: boolean;

lib/services/files-hash-service.ts

@@ -0,0 +1,32 @@
+import { executeActionByChunks } from "../common/helpers";
+import { DEFAULT_CHUNK_SIZE } from "../common/constants";
+
+export class FilesHashService implements IFilesHashService {
+	constructor(private $fs: IFileSystem,
+		private $logger: ILogger) { }
+
+	public async generateHashes(files: string[]): Promise<IStringDictionary> {
+		const result: IStringDictionary = {};
+
+		const action = async (file: string) => {
+			try {
+				const isFile = this.$fs.getFsStats(file).isFile();
+				if (isFile) {
+					result[file] = await this.$fs.getFileShasum(file);
+				}
+			} catch (err) {
+				this.$logger.trace(`Unable to generate hash for file ${file}. Error is: ${err}`);
+			}
+		};
+
+		await executeActionByChunks(files, DEFAULT_CHUNK_SIZE, action);
+
+		return result;
+	}
+
+	public async getChanges(files: string[], oldHashes: IStringDictionary): Promise<IStringDictionary> {
+		const newHashes = await this.generateHashes(files);
+		return _.omitBy(newHashes, (hash: string, pathToFile: string) => !!_.find(oldHashes, (oldHash: string, oldPath: string) => pathToFile === oldPath && hash === oldHash));
+	}
+}
+$injector.register("filesHashService", FilesHashService);

lib/services/livesync/livesync-service.ts

@@ -41,8 +41,7 @@ export class LiveSyncService extends EventEmitter implements IDebugLiveSyncServi
 		super();
 	}
 
-	public async liveSync(deviceDescriptors: ILiveSyncDeviceInfo[],
-		liveSyncData: ILiveSyncInfo): Promise<void> {
+	public async liveSync(deviceDescriptors: ILiveSyncDeviceInfo[], liveSyncData: ILiveSyncInfo): Promise<void> {
 		const projectData = this.$projectDataService.getProjectData(liveSyncData.projectDir);
 		await this.$pluginsService.ensureAllDependenciesAreInstalled(projectData);
 		await this.liveSyncOperation(deviceDescriptors, liveSyncData, projectData);
@@ -318,27 +317,19 @@ export class LiveSyncService extends EventEmitter implements IDebugLiveSyncServi
 	}
 
 	@hook("liveSync")
-	private async liveSyncOperation(deviceDescriptors: ILiveSyncDeviceInfo[],
-		liveSyncData: ILiveSyncInfo, projectData: IProjectData): Promise<void> {
+	private async liveSyncOperation(deviceDescriptors: ILiveSyncDeviceInfo[], liveSyncData: ILiveSyncInfo, projectData: IProjectData): Promise<void> {
 		// In case liveSync is called for a second time for the same projectDir.
 		const isAlreadyLiveSyncing = this.liveSyncProcessesInfo[projectData.projectDir] && !this.liveSyncProcessesInfo[projectData.projectDir].isStopped;
 
-		// Prevent cases where liveSync is called consecutive times with the same device, for example [ A, B, C ] and then [ A, B, D ] - we want to execute initialSync only for D.
-		const currentlyRunningDeviceDescriptors = this.getLiveSyncDeviceDescriptors(projectData.projectDir);
-		const deviceDescriptorsForInitialSync = isAlreadyLiveSyncing ? _.differenceBy(deviceDescriptors, currentlyRunningDeviceDescriptors, deviceDescriptorPrimaryKey) : deviceDescriptors;
 		this.setLiveSyncProcessInfo(liveSyncData.projectDir, deviceDescriptors);
 
-		await this.initialSync(projectData, deviceDescriptorsForInitialSync, liveSyncData);
-
 		if (!liveSyncData.skipWatcher && this.liveSyncProcessesInfo[projectData.projectDir].deviceDescriptors.length) {
 			// Should be set after prepare
 			this.$usbLiveSyncService.isInitialized = true;
-
-			const devicesIds = deviceDescriptors.map(dd => dd.identifier);
-			const devices = _.filter(this.$devicesService.getDeviceInstances(), device => _.includes(devicesIds, device.deviceInfo.identifier));
-			const platforms = _(devices).map(device => device.deviceInfo.platform).uniq().value();
-			await this.startWatcher(projectData, liveSyncData, platforms);
+			await this.startWatcher(projectData, liveSyncData, deviceDescriptors, { isAlreadyLiveSyncing });
 		}
+
+		await this.initialSync(projectData, liveSyncData, deviceDescriptors, { isAlreadyLiveSyncing });
 	}
 
 	private setLiveSyncProcessInfo(projectDir: string, deviceDescriptors: ILiveSyncDeviceInfo[]): void {
@@ -351,6 +342,13 @@ export class LiveSyncService extends EventEmitter implements IDebugLiveSyncServi
 		this.liveSyncProcessesInfo[projectDir].deviceDescriptors = _.uniqBy(currentDeviceDescriptors.concat(deviceDescriptors), deviceDescriptorPrimaryKey);
 	}
 
+	private async initialSync(projectData: IProjectData, liveSyncData: ILiveSyncInfo, deviceDescriptors: ILiveSyncDeviceInfo[], options: { isAlreadyLiveSyncing: boolean }): Promise<void> {
+		// Prevent cases where liveSync is called consecutive times with the same device, for example [ A, B, C ] and then [ A, B, D ] - we want to execute initialSync only for D.
+		const currentlyRunningDeviceDescriptors = this.getLiveSyncDeviceDescriptors(projectData.projectDir);
+		const deviceDescriptorsForInitialSync = options.isAlreadyLiveSyncing ? _.differenceBy(deviceDescriptors, currentlyRunningDeviceDescriptors, deviceDescriptorPrimaryKey) : deviceDescriptors;
+		await this.initialSyncCore(projectData, deviceDescriptorsForInitialSync, liveSyncData);
+	}
+
 	private getLiveSyncService(platform: string): IPlatformLiveSyncService {
 		if (this.$mobileHelper.isiOSPlatform(platform)) {
 			return this.$injector.resolve("iOSLiveSyncService");
@@ -452,7 +450,7 @@ export class LiveSyncService extends EventEmitter implements IDebugLiveSyncServi
 		return null;
 	}
 
-	private async initialSync(projectData: IProjectData, deviceDescriptors: ILiveSyncDeviceInfo[], liveSyncData: ILiveSyncInfo): Promise<void> {
+	private async initialSyncCore(projectData: IProjectData, deviceDescriptors: ILiveSyncDeviceInfo[], liveSyncData: ILiveSyncInfo): Promise<void> {
 		const preparedPlatforms: string[] = [];
 		const rebuiltInformation: ILiveSyncBuildInfo[] = [];
 
@@ -483,6 +481,7 @@ export class LiveSyncService extends EventEmitter implements IDebugLiveSyncServi
 					useLiveEdit: liveSyncData.useLiveEdit,
 					watch: !liveSyncData.skipWatcher
 				});
+
 				await this.$platformService.trackActionForPlatform({ action: "LiveSync", platform: device.deviceInfo.platform, isForDevice: !device.isEmulator, deviceOsVersion: device.deviceInfo.version });
 				await this.refreshApplication(projectData, liveSyncResultInfo, deviceBuildInfoDescriptor.debugOptions, deviceBuildInfoDescriptor.outputPath);
 
@@ -525,7 +524,10 @@ export class LiveSyncService extends EventEmitter implements IDebugLiveSyncServi
 		};
 	}
 
-	private async startWatcher(projectData: IProjectData, liveSyncData: ILiveSyncInfo, platforms: string[]): Promise<void> {
+	private async startWatcher(projectData: IProjectData, liveSyncData: ILiveSyncInfo, deviceDescriptors: ILiveSyncDeviceInfo[], options: { isAlreadyLiveSyncing: boolean }): Promise<void> {
+		const devicesIds = deviceDescriptors.map(dd => dd.identifier);
+		const devices = _.filter(this.$devicesService.getDeviceInstances(), device => _.includes(devicesIds, device.deviceInfo.identifier));
+		const platforms = _(devices).map(device => device.deviceInfo.platform).uniq().value();
 		const patterns = await this.getWatcherPatterns(liveSyncData, projectData, platforms);
 
 		if (liveSyncData.watchAllFiles) {

lib/services/project-changes-service.ts

@@ -48,7 +48,8 @@ export class ProjectChangesService implements IProjectChangesService {
 	constructor(
 		private $platformsData: IPlatformsData,
 		private $devicePlatformsConstants: Mobile.IDevicePlatformsConstants,
-		private $fs: IFileSystem) {
+		private $fs: IFileSystem,
+		private $filesHashService: IFilesHashService) {
 	}
 
 	public get currentChanges(): IProjectChangesInfo {
@@ -58,9 +59,12 @@ export class ProjectChangesService implements IProjectChangesService {
 	public async checkForChanges(platform: string, projectData: IProjectData, projectChangesOptions: IProjectChangesOptions): Promise<IProjectChangesInfo> {
 		const platformData = this.$platformsData.getPlatformData(platform, projectData);
 		this._changesInfo = new ProjectChangesInfo();
-		if (!this.ensurePrepareInfo(platform, projectData, projectChangesOptions)) {
+		const isNewPrepareInfo = await this.ensurePrepareInfo(platform, projectData, projectChangesOptions);
+		if (!isNewPrepareInfo) {
 			this._newFiles = 0;
-			this._changesInfo.appFilesChanged = this.containsNewerFiles(projectData.appDirectoryPath, projectData.appResourcesDirectoryPath, projectData);
+
+			this._changesInfo.appFilesChanged = await this.hasChangedAppFiles(projectData);
+
 			this._changesInfo.packageChanged = this.isProjectFileChanged(projectData, platform);
 			this._changesInfo.appResourcesChanged = this.containsNewerFiles(projectData.appResourcesDirectoryPath, null, projectData);
 			/*done because currently all node_modules are traversed, a possible improvement could be traversing only the production dependencies*/
@@ -152,7 +156,7 @@ export class ProjectChangesService implements IProjectChangesService {
 		}
 	}
 
-	private ensurePrepareInfo(platform: string, projectData: IProjectData, projectChangesOptions: IProjectChangesOptions): boolean {
+	private async ensurePrepareInfo(platform: string, projectData: IProjectData, projectChangesOptions: IProjectChangesOptions): Promise<boolean> {
 		this._prepareInfo = this.getPrepareInfo(platform, projectData);
 		if (this._prepareInfo) {
 			this._prepareInfo.nativePlatformStatus = this._prepareInfo.nativePlatformStatus && this._prepareInfo.nativePlatformStatus < projectChangesOptions.nativePlatformStatus ?
@@ -173,7 +177,8 @@ export class ProjectChangesService implements IProjectChangesService {
 			release: projectChangesOptions.release,
 			changesRequireBuild: true,
 			projectFileHash: this.getProjectFileStrippedHash(projectData, platform),
-			changesRequireBuildTime: null
+			changesRequireBuildTime: null,
+			appFilesHashes: await this.$filesHashService.generateHashes(this.getAppFiles(projectData))
 		};
 
 		this._outputProjectMtime = 0;
@@ -300,5 +305,20 @@ export class ProjectChangesService implements IProjectChangesService {
 		}
 		return false;
 	}
+
+	private getAppFiles(projectData: IProjectData): string[] {
+		return this.$fs.enumerateFilesInDirectorySync(projectData.appDirectoryPath, (filePath: string, stat: IFsStats) => filePath !== projectData.appResourcesDirectoryPath);
+	}
+
+	private async hasChangedAppFiles(projectData: IProjectData): Promise<boolean> {
+		const files = this.getAppFiles(projectData);
+		const changedFiles = await this.$filesHashService.getChanges(files, this._prepareInfo.appFilesHashes || {});
+		const hasChanges = changedFiles && _.keys(changedFiles).length > 0;
+		if (hasChanges) {
+			this._prepareInfo.appFilesHashes = await this.$filesHashService.generateHashes(files);
+		}
+
+		return hasChanges;
+	}
 }
 $injector.register("projectChangesService", ProjectChangesService);

test/npm-support.ts

@@ -98,6 +98,10 @@ function createTestInjector(): IInjector {
 	});
 	testInjector.register("httpClient", {});
 	testInjector.register("androidResourcesMigrationService", stubs.AndroidResourcesMigrationServiceStub);
+	testInjector.register("filesHashService", {
+		getChanges: () => Promise.resolve({}),
+		generateHashes: () => Promise.resolve()
+	});
 
 	return testInjector;
 }

test/platform-commands.ts

@@ -164,6 +164,7 @@ function createTestInjector() {
 	testInjector.register("analyticsSettingsService", {
 		getPlaygroundInfo: () => Promise.resolve(null)
 	});
+	testInjector.register("filesHashService", {});
 
 	return testInjector;
 }

test/platform-service.ts

@@ -106,6 +106,10 @@ function createTestInjector() {
 		})
 	});
 	testInjector.register("androidResourcesMigrationService", stubs.AndroidResourcesMigrationServiceStub);
+	testInjector.register("filesHashService", {
+		generateHashes: () => Promise.resolve(),
+		getChanges: () => Promise.resolve({test: "testHash"})
+	});
 
 	return testInjector;
 }

test/project-changes-service.ts

@@ -30,6 +30,12 @@ class ProjectChangesServiceTest extends BaseServiceTest {
 		this.injector.register("devicePlatformsConstants", {});
 		this.injector.register("devicePlatformsConstants", {});
 		this.injector.register("projectChangesService", ProjectChangesService);
+		this.injector.register("filesHashService", {
+			generateHashes: () => Promise.resolve({})
+		});
+		this.injector.register("logger", {
+			warn: () => ({})
+		});
 
 		const fs = this.injector.resolve<IFileSystem>("fs");
 		fs.writeJson(path.join(this.projectDir, Constants.PACKAGE_JSON_FILE_NAME), {
@@ -127,7 +133,8 @@ describe("Project Changes Service Tests", () => {
 					changesRequireBuildTime: new Date().toString(),
 					iOSProvisioningProfileUUID: "provisioning_profile_test",
 					projectFileHash: "",
-					nativePlatformStatus: Constants.NativePlatformStatus.requiresPlatformAdd
+					nativePlatformStatus: Constants.NativePlatformStatus.requiresPlatformAdd,
+					appFilesHashes: {}
 				};
 				fs.writeJson(prepareInfoPath, expectedPrepareInfo);