SQL Operations Studio Public Preview 1 (0.23) release source code

extensions/git/src/util.ts

@@ -0,0 +1,191 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the Source EULA. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+'use strict';
+
+import { Event } from 'vscode';
+import { dirname } from 'path';
+import * as fs from 'fs';
+
+export function log(...args: any[]): void {
+	console.log.apply(console, ['git:', ...args]);
+}
+
+export interface IDisposable {
+	dispose(): void;
+}
+
+export function dispose<T extends IDisposable>(disposables: T[]): T[] {
+	disposables.forEach(d => d.dispose());
+	return [];
+}
+
+export function toDisposable(dispose: () => void): IDisposable {
+	return { dispose };
+}
+
+export function combinedDisposable(disposables: IDisposable[]): IDisposable {
+	return toDisposable(() => dispose(disposables));
+}
+
+export const EmptyDisposable = toDisposable(() => null);
+
+export function mapEvent<I, O>(event: Event<I>, map: (i: I) => O): Event<O> {
+	return (listener, thisArgs = null, disposables?) => event(i => listener.call(thisArgs, map(i)), null, disposables);
+}
+
+export function filterEvent<T>(event: Event<T>, filter: (e: T) => boolean): Event<T> {
+	return (listener, thisArgs = null, disposables?) => event(e => filter(e) && listener.call(thisArgs, e), null, disposables);
+}
+
+export function anyEvent<T>(...events: Event<T>[]): Event<T> {
+	return (listener, thisArgs = null, disposables?) => {
+		const result = combinedDisposable(events.map(event => event(i => listener.call(thisArgs, i))));
+
+		if (disposables) {
+			disposables.push(result);
+		}
+
+		return result;
+	};
+}
+
+export function done<T>(promise: Promise<T>): Promise<void> {
+	return promise.then<void>(() => void 0);
+}
+
+export function onceEvent<T>(event: Event<T>): Event<T> {
+	return (listener, thisArgs = null, disposables?) => {
+		const result = event(e => {
+			result.dispose();
+			return listener.call(thisArgs, e);
+		}, null, disposables);
+
+		return result;
+	};
+}
+
+export function eventToPromise<T>(event: Event<T>): Promise<T> {
+	return new Promise<T>(c => onceEvent(event)(c));
+}
+
+export function once(fn: (...args: any[]) => any): (...args: any[]) => any {
+	let didRun = false;
+
+	return (...args) => {
+		if (didRun) {
+			return;
+		}
+
+		return fn(...args);
+	};
+}
+
+export function assign<T>(destination: T, ...sources: any[]): T {
+	for (const source of sources) {
+		Object.keys(source).forEach(key => destination[key] = source[key]);
+	}
+
+	return destination;
+}
+
+export function uniqBy<T>(arr: T[], fn: (el: T) => string): T[] {
+	const seen = Object.create(null);
+
+	return arr.filter(el => {
+		const key = fn(el);
+
+		if (seen[key]) {
+			return false;
+		}
+
+		seen[key] = true;
+		return true;
+	});
+}
+
+export function groupBy<T>(arr: T[], fn: (el: T) => string): { [key: string]: T[] } {
+	return arr.reduce((result, el) => {
+		const key = fn(el);
+		result[key] = [...(result[key] || []), el];
+		return result;
+	}, Object.create(null));
+}
+
+export function denodeify<R>(fn: Function): (...args) => Promise<R> {
+	return (...args) => new Promise<R>((c, e) => fn(...args, (err, r) => err ? e(err) : c(r)));
+}
+
+export function nfcall<R>(fn: Function, ...args): Promise<R> {
+	return new Promise<R>((c, e) => fn(...args, (err, r) => err ? e(err) : c(r)));
+}
+
+export async function mkdirp(path: string, mode?: number): Promise<boolean> {
+	const mkdir = async () => {
+		try {
+			await nfcall(fs.mkdir, path, mode);
+		} catch (err) {
+			if (err.code === 'EEXIST') {
+				const stat = await nfcall<fs.Stats>(fs.stat, path);
+
+				if (stat.isDirectory) {
+					return;
+				}
+
+				throw new Error(`'${path}' exists and is not a directory.`);
+			}
+
+			throw err;
+		}
+	};
+
+	// is root?
+	if (path === dirname(path)) {
+		return true;
+	}
+
+	try {
+		await mkdir();
+	} catch (err) {
+		if (err.code !== 'ENOENT') {
+			throw err;
+		}
+
+		await mkdirp(dirname(path), mode);
+		await mkdir();
+	}
+
+	return true;
+}
+
+export function uniqueFilter<T>(keyFn: (t: T) => string): (t: T) => boolean {
+	const seen: { [key: string]: boolean; } = Object.create(null);
+
+	return element => {
+		const key = keyFn(element);
+
+		if (seen[key]) {
+			return false;
+		}
+
+		seen[key] = true;
+		return true;
+	};
+}
+
+export function find<T>(array: T[], fn: (t: T) => boolean): T | undefined {
+	let result: T | undefined = undefined;
+
+	array.some(e => {
+		if (fn(e)) {
+			result = e;
+			return true;
+		}
+
+		return false;
+	});
+
+	return result;
+}