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vscode-react-native/src/common

src/common/commandExecutor.ts

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1// Copyright (c) Microsoft Corporation. All rights reserved.
2// Licensed under the MIT license. See LICENSE file in the project root for details.
3
4import * as Q from "q";
5import {ChildProcess} from "child_process";
6import {Log} from "./log/log";
7import {Node} from "./node/node";
8import {ISpawnResult} from "./node/childProcess";
9import {HostPlatform, HostPlatformId} from "../common/hostPlatform";
10import {ErrorHelper} from "./error/errorHelper";
11import {InternalErrorCode} from "./error/internalErrorCode";
12
13interface EnvironmentOptions {
14 REACT_DEBUGGER?: string;
15}
16
17interface Options {
18 env?: EnvironmentOptions;
19}
20
21export enum CommandStatus {
22 Start = 0,
23 End = 1
24}
25
26export class CommandExecutor {
27 private static ReactNativeCommand = "react-native";
28 private currentWorkingDirectory: string;
29
30 constructor(currentWorkingDirectory?: string) {
31 this.currentWorkingDirectory = currentWorkingDirectory || process.cwd();
32 }
33
34 public execute(command: string, options: Options = {}): Q.Promise<void> {
35 Log.logCommandStatus(command, CommandStatus.Start);
36 return new Node.ChildProcess().execToString(command, { cwd: this.currentWorkingDirectory, env: options.env })
37 .then(stdout => {
38 Log.logMessage(stdout);
39 Log.logCommandStatus(command, CommandStatus.End);
40 },
41 (reason: Error) =>
42 this.generateRejectionForCommand(command, reason));
43 }
44
45 /**
46 * Spawns a child process with the params passed
47 * This method waits until the spawned process finishes execution
48 * {command} - The command to be invoked in the child process
49 * {args} - Arguments to be passed to the command
50 * {options} - additional options with which the child process needs to be spawned
51 */
52 public spawn(command: string, args: string[], options: Options = {}): Q.Promise<any> {
53 return this.spawnChildProcess(command, args, true, options).outcome;
54 }
55
56 /**
57 * Spawns the React Native packager in a child process.
58 */
59 public spawnReactPackager(args?: string[], options: Options = {}): Q.Promise<ISpawnResult> {
60 let command = HostPlatform.getNpmCliCommand(CommandExecutor.ReactNativeCommand);
61 let runArguments = ["start"];
62
63 if (args) {
64 runArguments = runArguments.concat(args);
65 }
66
67 let spawnOptions = Object.assign({}, { cwd: this.currentWorkingDirectory }, options);
68 let result = this.spawnChildProcess(command, runArguments, false, spawnOptions);
69 return Q.resolve(result);
70 }
71
72 /**
73 * Kills the React Native packager in a child process.
74 */
75 public killReactPackager(packagerProcess: ChildProcess): Q.Promise<void> {
76 Log.logMessage("Stopping Packager");
77
78 if (packagerProcess) {
79 return Q({}).then(() => {
80 if (HostPlatform.getPlatformId() === HostPlatformId.WINDOWS) {
81 return new Node.ChildProcess().exec("taskkill /pid " + packagerProcess.pid + " /T /F").outcome;
82 } else {
83 packagerProcess.kill();
84 }
85 }).then(() => {
86 Log.logMessage("Packager stopped");
87 });
88
89 } else {
90 Log.logMessage("Packager not found");
91 return Q.resolve<void>(void 0);
92 }
93 }
94
95 /**
96 * Executes a react native command and waits for its completion.
97 */
98 public spawnReactCommand(command: string, args?: string[], waitForExit: boolean = true, options: Options = {}): ISpawnResult {
99 return this.spawnChildReactCommandProcess(command, args, waitForExit, options);
100 }
101
102 public spawnChildReactCommandProcess(command: string, args?: string[], waitForExit: boolean = true, options: Options = {}): ISpawnResult {
103 let runArguments = [command];
104 if (args) {
105 runArguments = runArguments.concat(args);
106 }
107
108 let reactCommand = HostPlatform.getNpmCliCommand(CommandExecutor.ReactNativeCommand);
109 return this.spawnChildProcess(reactCommand, runArguments, waitForExit, options);
110 }
111
112 private spawnChildProcess(command: string, args: string[], waitForExit: boolean = true, options: Options = {}): ISpawnResult {
113 let spawnOptions = Object.assign({}, { cwd: this.currentWorkingDirectory }, options);
114 let commandWithArgs = command + " " + args.join(" ");
115 let childProcessHelper = new Node.ChildProcess();
116
117 Log.logCommandStatus(commandWithArgs, CommandStatus.Start);
118 let result = waitForExit ? childProcessHelper.spawnWaitUntilFinished(command, args, spawnOptions) : childProcessHelper.spawnWaitUntilStarted(command, args, spawnOptions);
119
120 result.stderr.on("data", (data: Buffer) => {
121 Log.logStreamData(data, process.stderr);
122 });
123
124 result.stdout.on("data", (data: Buffer) => {
125 Log.logStreamData(data, process.stdout);
126 });
127
128 result.outcome = result.outcome.then(
129 () =>
130 Log.logCommandStatus(commandWithArgs, CommandStatus.End),
131 reason =>
132 this.generateRejectionForCommand(commandWithArgs, reason));
133 return result;
134 }
135
136 private generateRejectionForCommand(command: string, reason: any): Q.Promise<void> {
137 return Q.reject<void>(ErrorHelper.getNestedError(reason, InternalErrorCode.CommandFailed, command));
138 }
139}
140