microsoft/vscode-react-native
Publicmirrored from https://github.com/microsoft/vscode-react-nativeAvailable
src/common/node/childProcess.ts
95lines · modecode
| 1 | // Copyright (c) Microsoft Corporation. All rights reserved. |
| 2 | // Licensed under the MIT license. See LICENSE file in the project root for details. |
| 3 | |
| 4 | import * as child_process from "child_process"; |
| 5 | import Q = require("q"); |
| 6 | import {NestedError} from "../nestedError"; |
| 7 | |
| 8 | export interface IExecResult { |
| 9 | process: child_process.ChildProcess; |
| 10 | outcome: Q.Promise<Buffer>; |
| 11 | } |
| 12 | |
| 13 | export interface ISpawnResult { |
| 14 | spawnedProcess: child_process.ChildProcess; |
| 15 | stdin: NodeJS.WritableStream; |
| 16 | stdout: NodeJS.ReadableStream; |
| 17 | stderr: NodeJS.ReadableStream; |
| 18 | outcome: Q.Promise<void>; |
| 19 | } |
| 20 | |
| 21 | interface IExecOptions { |
| 22 | cwd?: string; |
| 23 | stdio?: any; |
| 24 | env?: any; |
| 25 | encoding?: string; |
| 26 | timeout?: number; |
| 27 | maxBuffer?: number; |
| 28 | killSignal?: string; |
| 29 | } |
| 30 | |
| 31 | interface ISpawnOptions { |
| 32 | cwd?: string; |
| 33 | stdio?: any; |
| 34 | env?: any; |
| 35 | detached?: boolean; |
| 36 | } |
| 37 | |
| 38 | export class ChildProcess { |
| 39 | public exec(command: string, options: IExecOptions = {}): IExecResult { |
| 40 | let outcome = Q.defer<Buffer>(); |
| 41 | |
| 42 | let execProcess = child_process.exec(command, options, (error: Error, stdout: Buffer, stderr: Buffer) => { |
| 43 | if (error) { |
| 44 | outcome.reject(new NestedError(`Error while executing command ${command}`, error, stderr)); |
| 45 | } else { |
| 46 | outcome.resolve(stdout); |
| 47 | } |
| 48 | }); |
| 49 | |
| 50 | return { process: execProcess, outcome: outcome.promise }; |
| 51 | } |
| 52 | |
| 53 | public execToString(command: string, options: IExecOptions = {}): Q.Promise<string> { |
| 54 | return this.exec(command).outcome.then(stdout => stdout.toString()); |
| 55 | } |
| 56 | |
| 57 | public spawnWithExitHandler(command: string, args?: string[], options: ISpawnOptions = {}): ISpawnResult { |
| 58 | let outcome = Q.defer<void>(); |
| 59 | |
| 60 | let spawnedProcess = child_process.spawn(command, args, options); |
| 61 | spawnedProcess.once("error", (error: any) => { |
| 62 | outcome.reject(error); |
| 63 | }); |
| 64 | spawnedProcess.once("exit", (code: number) => { |
| 65 | if (code === 0) { |
| 66 | outcome.resolve(void 0); |
| 67 | } else { |
| 68 | outcome.reject(new Error(`Command ${command} failed with error code ${code}`)); |
| 69 | } |
| 70 | }); |
| 71 | |
| 72 | return { |
| 73 | spawnedProcess: spawnedProcess, |
| 74 | stdin: spawnedProcess.stdin, |
| 75 | stdout: spawnedProcess.stdout, |
| 76 | stderr: spawnedProcess.stderr, |
| 77 | outcome: outcome.promise }; |
| 78 | } |
| 79 | |
| 80 | public spawn(command: string, args?: string[], options: ISpawnOptions = {}): ISpawnResult { |
| 81 | let outcome = Q.defer<void>(); |
| 82 | let spawnedProcess = child_process.spawn(command, args, options); |
| 83 | spawnedProcess.once("error", (error: any) => { |
| 84 | outcome.reject(new NestedError(`Error while executing command ${command}`, error)); |
| 85 | }); |
| 86 | |
| 87 | return { |
| 88 | spawnedProcess: spawnedProcess, |
| 89 | stdin: spawnedProcess.stdin, |
| 90 | stdout: spawnedProcess.stdout, |
| 91 | stderr: spawnedProcess.stderr, |
| 92 | outcome: outcome.promise |
| 93 | }; |
| 94 | } |
| 95 | } |
| 96 | |