source: trip-planner-front/node_modules/webpack/lib/library/SystemLibraryPlugin.js@ 6a3a178

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

initial commit
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1/*
2 MIT License http://www.opensource.org/licenses/mit-license.php
3 Author Joel Denning @joeldenning
4*/
5
6"use strict";
7
8const { ConcatSource } = require("webpack-sources");
9const { UsageState } = require("../ExportsInfo");
10const ExternalModule = require("../ExternalModule");
11const Template = require("../Template");
12const propertyAccess = require("../util/propertyAccess");
13const AbstractLibraryPlugin = require("./AbstractLibraryPlugin");
14
15/** @typedef {import("webpack-sources").Source} Source */
16/** @typedef {import("../../declarations/WebpackOptions").LibraryOptions} LibraryOptions */
17/** @typedef {import("../../declarations/WebpackOptions").LibraryType} LibraryType */
18/** @typedef {import("../Chunk")} Chunk */
19/** @typedef {import("../Compilation").ChunkHashContext} ChunkHashContext */
20/** @typedef {import("../Compiler")} Compiler */
21/** @typedef {import("../javascript/JavascriptModulesPlugin").RenderContext} RenderContext */
22/** @typedef {import("../util/Hash")} Hash */
23/** @template T @typedef {import("./AbstractLibraryPlugin").LibraryContext<T>} LibraryContext<T> */
24
25/**
26 * @typedef {Object} SystemLibraryPluginOptions
27 * @property {LibraryType} type
28 */
29
30/**
31 * @typedef {Object} SystemLibraryPluginParsed
32 * @property {string} name
33 */
34
35/**
36 * @typedef {SystemLibraryPluginParsed} T
37 * @extends {AbstractLibraryPlugin<SystemLibraryPluginParsed>}
38 */
39class SystemLibraryPlugin extends AbstractLibraryPlugin {
40 /**
41 * @param {SystemLibraryPluginOptions} options the plugin options
42 */
43 constructor(options) {
44 super({
45 pluginName: "SystemLibraryPlugin",
46 type: options.type
47 });
48 }
49
50 /**
51 * @param {LibraryOptions} library normalized library option
52 * @returns {T | false} preprocess as needed by overriding
53 */
54 parseOptions(library) {
55 const { name } = library;
56 if (name && typeof name !== "string") {
57 throw new Error(
58 `System.js library name must be a simple string or unset. ${AbstractLibraryPlugin.COMMON_LIBRARY_NAME_MESSAGE}`
59 );
60 }
61 return {
62 name: /** @type {string=} */ (name)
63 };
64 }
65
66 /**
67 * @param {Source} source source
68 * @param {RenderContext} renderContext render context
69 * @param {LibraryContext<T>} libraryContext context
70 * @returns {Source} source with library export
71 */
72 render(source, { chunkGraph, moduleGraph, chunk }, { options, compilation }) {
73 const modules = chunkGraph
74 .getChunkModules(chunk)
75 .filter(m => m instanceof ExternalModule && m.externalType === "system");
76 const externals = /** @type {ExternalModule[]} */ (modules);
77
78 // The name this bundle should be registered as with System
79 const name = options.name
80 ? `${JSON.stringify(compilation.getPath(options.name, { chunk }))}, `
81 : "";
82
83 // The array of dependencies that are external to webpack and will be provided by System
84 const systemDependencies = JSON.stringify(
85 externals.map(m =>
86 typeof m.request === "object" && !Array.isArray(m.request)
87 ? m.request.amd
88 : m.request
89 )
90 );
91
92 // The name of the variable provided by System for exporting
93 const dynamicExport = "__WEBPACK_DYNAMIC_EXPORT__";
94
95 // An array of the internal variable names for the webpack externals
96 const externalWebpackNames = externals.map(
97 m =>
98 `__WEBPACK_EXTERNAL_MODULE_${Template.toIdentifier(
99 `${chunkGraph.getModuleId(m)}`
100 )}__`
101 );
102
103 // Declaring variables for the internal variable names for the webpack externals
104 const externalVarDeclarations = externalWebpackNames
105 .map(name => `var ${name} = {};`)
106 .join("\n");
107
108 // Define __esModule flag on all internal variables and helpers
109 const externalVarInitialization = [];
110
111 // The system.register format requires an array of setter functions for externals.
112 const setters =
113 externalWebpackNames.length === 0
114 ? ""
115 : Template.asString([
116 "setters: [",
117 Template.indent(
118 externals
119 .map((module, i) => {
120 const external = externalWebpackNames[i];
121 const exportsInfo = moduleGraph.getExportsInfo(module);
122 const otherUnused =
123 exportsInfo.otherExportsInfo.getUsed(chunk.runtime) ===
124 UsageState.Unused;
125 const instructions = [];
126 const handledNames = [];
127 for (const exportInfo of exportsInfo.orderedExports) {
128 const used = exportInfo.getUsedName(
129 undefined,
130 chunk.runtime
131 );
132 if (used) {
133 if (otherUnused || used !== exportInfo.name) {
134 instructions.push(
135 `${external}${propertyAccess([
136 used
137 ])} = module${propertyAccess([exportInfo.name])};`
138 );
139 handledNames.push(exportInfo.name);
140 }
141 } else {
142 handledNames.push(exportInfo.name);
143 }
144 }
145 if (!otherUnused) {
146 if (
147 !Array.isArray(module.request) ||
148 module.request.length === 1
149 ) {
150 externalVarInitialization.push(
151 `Object.defineProperty(${external}, "__esModule", { value: true });`
152 );
153 }
154 if (handledNames.length > 0) {
155 const name = `${external}handledNames`;
156 externalVarInitialization.push(
157 `var ${name} = ${JSON.stringify(handledNames)};`
158 );
159 instructions.push(
160 Template.asString([
161 "Object.keys(module).forEach(function(key) {",
162 Template.indent([
163 `if(${name}.indexOf(key) >= 0)`,
164 Template.indent(`${external}[key] = module[key];`)
165 ]),
166 "});"
167 ])
168 );
169 } else {
170 instructions.push(
171 Template.asString([
172 "Object.keys(module).forEach(function(key) {",
173 Template.indent([`${external}[key] = module[key];`]),
174 "});"
175 ])
176 );
177 }
178 }
179 if (instructions.length === 0) return "function() {}";
180 return Template.asString([
181 "function(module) {",
182 Template.indent(instructions),
183 "}"
184 ]);
185 })
186 .join(",\n")
187 ),
188 "],"
189 ]);
190
191 return new ConcatSource(
192 Template.asString([
193 `System.register(${name}${systemDependencies}, function(${dynamicExport}, __system_context__) {`,
194 Template.indent([
195 externalVarDeclarations,
196 Template.asString(externalVarInitialization),
197 "return {",
198 Template.indent([
199 setters,
200 "execute: function() {",
201 Template.indent(`${dynamicExport}(`)
202 ])
203 ]),
204 ""
205 ]),
206 source,
207 Template.asString([
208 "",
209 Template.indent([
210 Template.indent([Template.indent([");"]), "}"]),
211 "};"
212 ]),
213 "})"
214 ])
215 );
216 }
217
218 /**
219 * @param {Chunk} chunk the chunk
220 * @param {Hash} hash hash
221 * @param {ChunkHashContext} chunkHashContext chunk hash context
222 * @param {LibraryContext<T>} libraryContext context
223 * @returns {void}
224 */
225 chunkHash(chunk, hash, chunkHashContext, { options, compilation }) {
226 hash.update("SystemLibraryPlugin");
227 if (options.name) {
228 hash.update(compilation.getPath(options.name, { chunk }));
229 }
230 }
231}
232
233module.exports = SystemLibraryPlugin;
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