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vscode-react-native/tools

tools/gulp-extras.js

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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"use strict";
4
5const child_process = require("child_process");
6const fs = require("fs");
7const log = require("fancy-log");
8const colors = require("ansi-colors");
9const path = require("path");
10const PluginError = require("plugin-error");
11const through = require("through2");
12
13/**
14 * Pretty logger using 'log'
15 * @param {string} pluginName Name of the pluginName
16 * @param {Object} file A gulp file to report on
17 * @param {string} message The error message to display
18 */
19function logError(pluginName, file, message) {
20 const sourcePath = path.relative(__dirname, file.path).replace(/..\//g, "''");
21 log(`[${colors.cyan(pluginName)}] ${colors.red("error")} ${sourcePath}: ${message}`);
22}
23
24/**
25 * Plugin to verify the Microsoft copyright notice is present
26 */
27function checkCopyright() {
28 const pluginName = "check-copyright";
29 let hadErrors = false;
30 const copyrightNotice =
31 "// Copyright (c) Microsoft Corporation. All rights reserved.\n// Licensed under the MIT license. See LICENSE file in the project root for details.";
32
33 return through.obj(
34 function (file, encoding, callback) {
35 if (file.isBuffer()) {
36 let fileContents = file.contents.toString(encoding);
37 fileContents = fileContents.replace("\r\n", "\n");
38 fileContents = fileContents.replace('"use strict";\n', "");
39 fileContents = fileContents.replace(
40 'Object.defineProperty(exports, "__esModule", { value: true });\n',
41 "",
42 );
43
44 if (fileContents.indexOf(copyrightNotice) !== 0) {
45 logError(pluginName, file, "missing copyright notice");
46 hadErrors = true;
47 }
48 }
49
50 callback(null, file);
51 },
52 function (callback) {
53 if (hadErrors) {
54 return this.emit("error", new PluginError(pluginName, "Failed copyright check"));
55 }
56 callback();
57 },
58 );
59}
60
61/**
62 * Helper function to check if a file exists case sensitive
63 * @param {string} filePath The path to check
64 * @returns {boolean} If the path exists case sensitive
65 */
66function existsCaseSensitive(filePath) {
67 if (fs.existsSync(filePath)) {
68 const fileName = path.basename(filePath);
69 return fs.readdirSync(path.dirname(filePath)).indexOf(fileName) !== -1;
70 }
71
72 return false;
73}
74
75function executeCommand(command, args, callback, opts) {
76 const proc = child_process.spawn(
77 command + (process.platform === "win32" ? ".cmd" : ""),
78 args,
79 Object.assign({}, opts, { shell: true }),
80 );
81 let errorSignaled = false;
82
83 proc.stdout.on("data", data => {
84 log(`${data}`);
85 });
86
87 proc.stderr.on("data", data => {
88 log.error(`${data}`);
89 });
90
91 proc.on("error", error => {
92 if (!errorSignaled) {
93 callback(`An error occurred. ${error}`);
94 errorSignaled = true;
95 }
96 });
97
98 proc.on("exit", code => {
99 if (code === 0) {
100 callback();
101 } else if (!errorSignaled) {
102 callback(`Error code: ${code}`);
103 errorSignaled = true;
104 }
105 });
106}
107
108async function withTimeout(promise, ms, { onTimeout, fallbackValue } = {}) {
109 let timer;
110 const guarded = promise
111 .then(value => ({ kind: "ok", value }))
112 .catch(error => ({ kind: "error", error }));
113
114 const timed = new Promise(resolve => {
115 timer = setTimeout(() => {
116 if (onTimeout) onTimeout();
117 resolve({ kind: "timeout", value: fallbackValue });
118 }, ms);
119 });
120
121 const result = await Promise.race([guarded, timed]);
122 clearTimeout(timer);
123
124 if (result.kind === "error") throw result.error;
125 if (result.kind === "timeout") return result.value;
126 return result.value;
127}
128
129module.exports = {
130 checkCopyright,
131 executeCommand,
132 withTimeout,
133};
134