return mkdirp(parentDir).then(() => {
			writeFileSync(storageFile, '');

			let service = new FileStorage(storageFile, () => null);

			service.setItem('some.key', 'some.value');
			assert.equal(service.getItem('some.key'), 'some.value');

			service.removeItem('some.key');
			assert.equal(service.getItem('some.key', 'some.default'), 'some.default');

			assert.ok(!service.getItem('some.unknonw.key'));

			service.setItem('some.other.key', 'some.other.value');

			service = new FileStorage(storageFile, () => null);

			assert.equal(service.getItem('some.other.key'), 'some.other.value');

			service.setItem('some.other.key', 'some.other.value');
			assert.equal(service.getItem('some.other.key'), 'some.other.value');

			service.setItem('some.undefined.key', undefined);
			assert.equal(service.getItem('some.undefined.key', 'some.default'), 'some.default');

			service.setItem('some.null.key', null);
			assert.equal(service.getItem('some.null.key', 'some.default'), 'some.default');
		});

export async function main(argv: string[]): Promise<any> {
	let args: ParsedArgs;

	try {
		args = parseCLIProcessArgv(argv);
	} catch (err) {
		console.error(err.message);
		return;
	}

	// Help
	if (args.help) {
		const executable = `${product.applicationName}${os.platform() === 'win32' ? '.exe' : ''}`;
		console.log(buildHelpMessage(product.nameLong, executable, pkg.version));
	}

	// Version Info
	else if (args.version) {
		console.log(buildVersionMessage(pkg.version, product.commit));
	}

	// Extensions Management
	else if (shouldSpawnCliProcess(args)) {
		const cli = await new Promise<IMainCli>((c, e) => require(['vs/code/node/cliProcessMain'], c, e));
		await cli.main(args);

		return;
	}

	// Write File
	else if (args['file-write']) {
		const source = args._[0];
		const target = args._[1];

		// Validate
		if (
			!source || !target || source === target ||					// make sure source and target are provided and are not the same
			!paths.isAbsolute(source) || !paths.isAbsolute(target) ||	// make sure both source and target are absolute paths
			!fs.existsSync(source) || !fs.statSync(source).isFile() ||	// make sure source exists as file
			!fs.existsSync(target) || !fs.statSync(target).isFile()		// make sure target exists as file
		) {
			throw new Error('Using --file-write with invalid arguments.');
		}

		try {

			// Check for readonly status and chmod if so if we are told so
			let targetMode: number = 0;
			let restoreMode = false;
			if (!!args['file-chmod']) {
				targetMode = fs.statSync(target).mode;
				if (!(targetMode & 128) /* readonly */) {
					fs.chmodSync(target, targetMode | 128);
					restoreMode = true;
				}
			}

			// Write source to target
			const data = fs.readFileSync(source);
			if (isWindows) {
				// On Windows we use a different strategy of saving the file
				// by first truncating the file and then writing with r+ mode.
				// This helps to save hidden files on Windows
				// (see https://github.com/Microsoft/vscode/issues/931) and
				// prevent removing alternate data streams
				// (see https://github.com/Microsoft/vscode/issues/6363)
				fs.truncateSync(target, 0);
				writeFileSync(target, data, { flag: 'r+' });
			} else {
				writeFileSync(target, data);
			}

			// Restore previous mode as needed
			if (restoreMode) {
				fs.chmodSync(target, targetMode);
			}
		} catch (error) {
			error.message = `Error using --file-write: ${error.message}`;
			throw error;
		}
	}

	// Just Code
	else {
		const env = assign({}, process.env, {
			'VSCODE_CLI': '1', // this will signal Code that it was spawned from this module
			'ELECTRON_NO_ATTACH_CONSOLE': '1'
		});

		delete env['ELECTRON_RUN_AS_NODE'];

		const processCallbacks: ((child: ChildProcess) => Promise<any>)[] = [];

		const verbose = args.verbose || args.status || typeof args['upload-logs'] !== 'undefined';
		if (verbose) {
			env['ELECTRON_ENABLE_LOGGING'] = '1';

			processCallbacks.push(async child => {
				child.stdout.on('data', (data: Buffer) => console.log(data.toString('utf8').trim()));
				child.stderr.on('data', (data: Buffer) => console.log(data.toString('utf8').trim()));
//.........这里部分代码省略.........

			processCallbacks.push(async _child => {

				class Profiler {
					static async start(name: string, filenamePrefix: string, opts: { port: number, tries?: number, target?: (targets: Target[]) => Target }) {
						const profiler = await import('v8-inspect-profiler');

						let session: ProfilingSession;
						try {
							session = await profiler.startProfiling(opts);
						} catch (err) {
							console.error(`FAILED to start profiling for '${name}' on port '${opts.port}'`);
						}

						return {
							async stop() {
								if (!session) {
									return;
								}
								let suffix = '';
								let profile = await session.stop();
								if (!process.env['VSCODE_DEV']) {
									// when running from a not-development-build we remove
									// absolute filenames because we don't want to reveal anything
									// about users. We also append the `.txt` suffix to make it
									// easier to attach these files to GH issues
									profile = profiler.rewriteAbsolutePaths(profile, 'piiRemoved');
									suffix = '.txt';
								}

								await profiler.writeProfile(profile, `${filenamePrefix}.${name}.cpuprofile${suffix}`);
							}
						};
					}
				}

				try {
					// load and start profiler
					const mainProfileRequest = Profiler.start('main', filenamePrefix, { port: portMain });
					const extHostProfileRequest = Profiler.start('extHost', filenamePrefix, { port: portExthost, tries: 300 });
					const rendererProfileRequest = Profiler.start('renderer', filenamePrefix, {
						port: portRenderer,
						tries: 200,
						target: function (targets) {
							return targets.filter(target => {
								if (!target.webSocketDebuggerUrl) {
									return false;
								}
								if (target.type === 'page') {
									return target.url.indexOf('workbench/workbench.html') > 0;
								} else {
									return true;
								}
							})[0];
						}
					});

					const main = await mainProfileRequest;
					const extHost = await extHostProfileRequest;
					const renderer = await rendererProfileRequest;

					// wait for the renderer to delete the
					// marker file
					await whenDeleted(filenamePrefix);

					// stop profiling
					await main.stop();
					await renderer.stop();
					await extHost.stop();

					// re-create the marker file to signal that profiling is done
					writeFileSync(filenamePrefix, '');

				} catch (e) {
					console.error('Failed to profile startup. Make sure to quit Code first.');
				}
			});