source: trip-planner-front/node_modules/webpack/lib/config/target.js@ 6a3a178

Last change on this file since 6a3a178 was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago

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1/*
2 MIT License http://www.opensource.org/licenses/mit-license.php
3 Author Tobias Koppers @sokra
4*/
5
6"use strict";
7
8const memoize = require("../util/memoize");
9
10const getBrowserslistTargetHandler = memoize(() =>
11 require("./browserslistTargetHandler")
12);
13
14/**
15 * @param {string} context the context directory
16 * @returns {string} default target
17 */
18const getDefaultTarget = context => {
19 const browsers = getBrowserslistTargetHandler().load(null, context);
20 return browsers ? "browserslist" : "web";
21};
22
23/**
24 * @typedef {Object} PlatformTargetProperties
25 * @property {boolean | null} web web platform, importing of http(s) and std: is available
26 * @property {boolean | null} browser browser platform, running in a normal web browser
27 * @property {boolean | null} webworker (Web)Worker platform, running in a web/shared/service worker
28 * @property {boolean | null} node node platform, require of node built-in modules is available
29 * @property {boolean | null} nwjs nwjs platform, require of legacy nw.gui is available
30 * @property {boolean | null} electron electron platform, require of some electron built-in modules is available
31 */
32
33/**
34 * @typedef {Object} ElectronContextTargetProperties
35 * @property {boolean | null} electronMain in main context
36 * @property {boolean | null} electronPreload in preload context
37 * @property {boolean | null} electronRenderer in renderer context with node integration
38 */
39
40/**
41 * @typedef {Object} ApiTargetProperties
42 * @property {boolean | null} require has require function available
43 * @property {boolean | null} nodeBuiltins has node.js built-in modules available
44 * @property {boolean | null} document has document available (allows script tags)
45 * @property {boolean | null} importScripts has importScripts available
46 * @property {boolean | null} importScriptsInWorker has importScripts available when creating a worker
47 * @property {boolean | null} fetchWasm has fetch function available for WebAssembly
48 * @property {boolean | null} global has global variable available
49 */
50
51/**
52 * @typedef {Object} EcmaTargetProperties
53 * @property {boolean | null} globalThis has globalThis variable available
54 * @property {boolean | null} bigIntLiteral big int literal syntax is available
55 * @property {boolean | null} const const and let variable declarations are available
56 * @property {boolean | null} arrowFunction arrow functions are available
57 * @property {boolean | null} forOf for of iteration is available
58 * @property {boolean | null} destructuring destructuring is available
59 * @property {boolean | null} dynamicImport async import() is available
60 * @property {boolean | null} dynamicImportInWorker async import() is available when creating a worker
61 * @property {boolean | null} module ESM syntax is available (when in module)
62 */
63
64///** @typedef {PlatformTargetProperties | ApiTargetProperties | EcmaTargetProperties | PlatformTargetProperties & ApiTargetProperties | PlatformTargetProperties & EcmaTargetProperties | ApiTargetProperties & EcmaTargetProperties} TargetProperties */
65/** @template T @typedef {{ [P in keyof T]?: never }} Never<T> */
66/** @template A @template B @typedef {(A & Never<B>) | (Never<A> & B) | (A & B)} Mix<A,B> */
67/** @typedef {Mix<Mix<PlatformTargetProperties, ElectronContextTargetProperties>, Mix<ApiTargetProperties, EcmaTargetProperties>>} TargetProperties */
68
69const versionDependent = (major, minor) => {
70 if (!major) return () => /** @type {undefined} */ (undefined);
71 major = +major;
72 minor = minor ? +minor : 0;
73 return (vMajor, vMinor = 0) => {
74 return major > vMajor || (major === vMajor && minor >= vMinor);
75 };
76};
77
78/** @type {[string, string, RegExp, (...args: string[]) => TargetProperties | false][]} */
79const TARGETS = [
80 [
81 "browserslist / browserslist:env / browserslist:query / browserslist:path-to-config / browserslist:path-to-config:env",
82 "Resolve features from browserslist. Will resolve browserslist config automatically. Only browser or node queries are supported (electron is not supported). Examples: 'browserslist:modern' to use 'modern' environment from browserslist config",
83 /^browserslist(?::(.+))?$/,
84 (rest, context) => {
85 const browserslistTargetHandler = getBrowserslistTargetHandler();
86 const browsers = browserslistTargetHandler.load(
87 rest ? rest.trim() : null,
88 context
89 );
90 if (!browsers) {
91 throw new Error(`No browserslist config found to handle the 'browserslist' target.
92See https://github.com/browserslist/browserslist#queries for possible ways to provide a config.
93The recommended way is to add a 'browserslist' key to your package.json and list supported browsers (resp. node.js versions).
94You can also more options via the 'target' option: 'browserslist' / 'browserslist:env' / 'browserslist:query' / 'browserslist:path-to-config' / 'browserslist:path-to-config:env'`);
95 }
96 return browserslistTargetHandler.resolve(browsers);
97 }
98 ],
99 [
100 "web",
101 "Web browser.",
102 /^web$/,
103 () => {
104 return {
105 web: true,
106 browser: true,
107 webworker: null,
108 node: false,
109 electron: false,
110 nwjs: false,
111
112 document: true,
113 importScriptsInWorker: true,
114 fetchWasm: true,
115 nodeBuiltins: false,
116 importScripts: false,
117 require: false,
118 global: false
119 };
120 }
121 ],
122 [
123 "webworker",
124 "Web Worker, SharedWorker or Service Worker.",
125 /^webworker$/,
126 () => {
127 return {
128 web: true,
129 browser: true,
130 webworker: true,
131 node: false,
132 electron: false,
133 nwjs: false,
134
135 importScripts: true,
136 importScriptsInWorker: true,
137 fetchWasm: true,
138 nodeBuiltins: false,
139 require: false,
140 document: false,
141 global: false
142 };
143 }
144 ],
145 [
146 "[async-]node[X[.Y]]",
147 "Node.js in version X.Y. The 'async-' prefix will load chunks asynchronously via 'fs' and 'vm' instead of 'require()'. Examples: node14.5, async-node10.",
148 /^(async-)?node(\d+(?:\.(\d+))?)?$/,
149 (asyncFlag, major, minor) => {
150 const v = versionDependent(major, minor);
151 // see https://node.green/
152 return {
153 node: true,
154 electron: false,
155 nwjs: false,
156 web: false,
157 webworker: false,
158 browser: false,
159
160 require: !asyncFlag,
161 nodeBuiltins: true,
162 global: true,
163 document: false,
164 fetchWasm: false,
165 importScripts: false,
166 importScriptsInWorker: false,
167
168 globalThis: v(12),
169 const: v(6),
170 arrowFunction: v(6),
171 forOf: v(5),
172 destructuring: v(6),
173 bigIntLiteral: v(10, 4),
174 dynamicImport: v(12, 17),
175 dynamicImportInWorker: major ? false : undefined,
176 module: v(12, 17)
177 };
178 }
179 ],
180 [
181 "electron[X[.Y]]-main/preload/renderer",
182 "Electron in version X.Y. Script is running in main, preload resp. renderer context.",
183 /^electron(\d+(?:\.(\d+))?)?-(main|preload|renderer)$/,
184 (major, minor, context) => {
185 const v = versionDependent(major, minor);
186 // see https://node.green/ + https://github.com/electron/releases
187 return {
188 node: true,
189 electron: true,
190 web: context !== "main",
191 webworker: false,
192 browser: false,
193 nwjs: false,
194
195 electronMain: context === "main",
196 electronPreload: context === "preload",
197 electronRenderer: context === "renderer",
198
199 global: true,
200 nodeBuiltins: true,
201 require: true,
202 document: context === "renderer",
203 fetchWasm: context === "renderer",
204 importScripts: false,
205 importScriptsInWorker: true,
206
207 globalThis: v(5),
208 const: v(1, 1),
209 arrowFunction: v(1, 1),
210 forOf: v(0, 36),
211 destructuring: v(1, 1),
212 bigIntLiteral: v(4),
213 dynamicImport: v(11),
214 dynamicImportInWorker: major ? false : undefined,
215 module: v(11)
216 };
217 }
218 ],
219 [
220 "nwjs[X[.Y]] / node-webkit[X[.Y]]",
221 "NW.js in version X.Y.",
222 /^(?:nwjs|node-webkit)(\d+(?:\.(\d+))?)?$/,
223 (major, minor) => {
224 const v = versionDependent(major, minor);
225 // see https://node.green/ + https://github.com/nwjs/nw.js/blob/nw48/CHANGELOG.md
226 return {
227 node: true,
228 web: true,
229 nwjs: true,
230 webworker: null,
231 browser: false,
232 electron: false,
233
234 global: true,
235 nodeBuiltins: true,
236 document: false,
237 importScriptsInWorker: false,
238 fetchWasm: false,
239 importScripts: false,
240 require: false,
241
242 globalThis: v(0, 43),
243 const: v(0, 15),
244 arrowFunction: v(0, 15),
245 forOf: v(0, 13),
246 destructuring: v(0, 15),
247 bigIntLiteral: v(0, 32),
248 dynamicImport: v(0, 43),
249 dynamicImportInWorker: major ? false : undefined,
250 module: v(0, 43)
251 };
252 }
253 ],
254 [
255 "esX",
256 "EcmaScript in this version. Examples: es2020, es5.",
257 /^es(\d+)$/,
258 version => {
259 let v = +version;
260 if (v < 1000) v = v + 2009;
261 return {
262 const: v >= 2015,
263 arrowFunction: v >= 2015,
264 forOf: v >= 2015,
265 destructuring: v >= 2015,
266 module: v >= 2015,
267 globalThis: v >= 2020,
268 bigIntLiteral: v >= 2020,
269 dynamicImport: v >= 2020,
270 dynamicImportInWorker: v >= 2020
271 };
272 }
273 ]
274];
275
276/**
277 * @param {string} target the target
278 * @param {string} context the context directory
279 * @returns {TargetProperties} target properties
280 */
281const getTargetProperties = (target, context) => {
282 for (const [, , regExp, handler] of TARGETS) {
283 const match = regExp.exec(target);
284 if (match) {
285 const [, ...args] = match;
286 const result = handler(...args, context);
287 if (result) return result;
288 }
289 }
290 throw new Error(
291 `Unknown target '${target}'. The following targets are supported:\n${TARGETS.map(
292 ([name, description]) => `* ${name}: ${description}`
293 ).join("\n")}`
294 );
295};
296
297const mergeTargetProperties = targetProperties => {
298 const keys = new Set();
299 for (const tp of targetProperties) {
300 for (const key of Object.keys(tp)) {
301 keys.add(key);
302 }
303 }
304 const result = {};
305 for (const key of keys) {
306 let hasTrue = false;
307 let hasFalse = false;
308 for (const tp of targetProperties) {
309 const value = tp[key];
310 switch (value) {
311 case true:
312 hasTrue = true;
313 break;
314 case false:
315 hasFalse = true;
316 break;
317 }
318 }
319 if (hasTrue || hasFalse)
320 result[key] = hasFalse && hasTrue ? null : hasTrue ? true : false;
321 }
322 return /** @type {TargetProperties} */ (result);
323};
324
325/**
326 * @param {string[]} targets the targets
327 * @param {string} context the context directory
328 * @returns {TargetProperties} target properties
329 */
330const getTargetsProperties = (targets, context) => {
331 return mergeTargetProperties(
332 targets.map(t => getTargetProperties(t, context))
333 );
334};
335
336exports.getDefaultTarget = getDefaultTarget;
337exports.getTargetProperties = getTargetProperties;
338exports.getTargetsProperties = getTargetsProperties;
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