mirror of https://github.com/webpack/webpack.git
719 lines
21 KiB
JavaScript
719 lines
21 KiB
JavaScript
/*
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MIT License http://www.opensource.org/licenses/mit-license.php
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Author Tobias Koppers @sokra
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*/
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"use strict";
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const { OriginalSource, RawSource } = require("webpack-sources");
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const ConcatenationScope = require("./ConcatenationScope");
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const { UsageState } = require("./ExportsInfo");
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const InitFragment = require("./InitFragment");
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const Module = require("./Module");
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const RuntimeGlobals = require("./RuntimeGlobals");
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const Template = require("./Template");
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const StaticExportsDependency = require("./dependencies/StaticExportsDependency");
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const createHash = require("./util/createHash");
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const extractUrlAndGlobal = require("./util/extractUrlAndGlobal");
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const makeSerializable = require("./util/makeSerializable");
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const propertyAccess = require("./util/propertyAccess");
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const { register } = require("./util/serialization");
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/** @typedef {import("webpack-sources").Source} Source */
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/** @typedef {import("../declarations/WebpackOptions").WebpackOptionsNormalized} WebpackOptions */
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/** @typedef {import("./Chunk")} Chunk */
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/** @typedef {import("./ChunkGraph")} ChunkGraph */
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/** @typedef {import("./Compilation")} Compilation */
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/** @typedef {import("./Dependency").UpdateHashContext} UpdateHashContext */
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/** @typedef {import("./DependencyTemplates")} DependencyTemplates */
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/** @typedef {import("./ExportsInfo")} ExportsInfo */
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/** @typedef {import("./Module").CodeGenerationContext} CodeGenerationContext */
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/** @typedef {import("./Module").CodeGenerationResult} CodeGenerationResult */
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/** @typedef {import("./Module").ConcatenationBailoutReasonContext} ConcatenationBailoutReasonContext */
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/** @typedef {import("./Module").LibIdentOptions} LibIdentOptions */
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/** @typedef {import("./Module").NeedBuildContext} NeedBuildContext */
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/** @typedef {import("./NormalModuleFactory")} NormalModuleFactory */
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/** @typedef {import("./RequestShortener")} RequestShortener */
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/** @typedef {import("./ResolverFactory").ResolverWithOptions} ResolverWithOptions */
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/** @typedef {import("./RuntimeTemplate")} RuntimeTemplate */
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/** @typedef {import("./WebpackError")} WebpackError */
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/** @typedef {import("./javascript/JavascriptModulesPlugin").ChunkRenderContext} ChunkRenderContext */
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/** @typedef {import("./util/Hash")} Hash */
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/** @typedef {typeof import("./util/Hash")} HashConstructor */
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/** @typedef {import("./util/fs").InputFileSystem} InputFileSystem */
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/** @typedef {import("./util/runtime").RuntimeSpec} RuntimeSpec */
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/**
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* @typedef {Object} SourceData
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* @property {boolean=} iife
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* @property {string=} init
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* @property {string} expression
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* @property {InitFragment<ChunkRenderContext>[]=} chunkInitFragments
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* @property {ReadonlySet<string>=} runtimeRequirements
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*/
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const TYPES = new Set(["javascript"]);
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const RUNTIME_REQUIREMENTS = new Set([RuntimeGlobals.module]);
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const RUNTIME_REQUIREMENTS_FOR_SCRIPT = new Set([RuntimeGlobals.loadScript]);
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const RUNTIME_REQUIREMENTS_FOR_MODULE = new Set([
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RuntimeGlobals.definePropertyGetters
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]);
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const EMPTY_RUNTIME_REQUIREMENTS = new Set([]);
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/**
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* @param {string|string[]} variableName the variable name or path
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* @param {string} type the module system
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* @returns {SourceData} the generated source
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*/
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const getSourceForGlobalVariableExternal = (variableName, type) => {
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if (!Array.isArray(variableName)) {
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// make it an array as the look up works the same basically
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variableName = [variableName];
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}
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// needed for e.g. window["some"]["thing"]
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const objectLookup = variableName.map(r => `[${JSON.stringify(r)}]`).join("");
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return {
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iife: type === "this",
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expression: `${type}${objectLookup}`
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};
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};
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/**
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* @param {string|string[]} moduleAndSpecifiers the module request
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* @returns {SourceData} the generated source
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*/
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const getSourceForCommonJsExternal = moduleAndSpecifiers => {
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if (!Array.isArray(moduleAndSpecifiers)) {
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return {
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expression: `require(${JSON.stringify(moduleAndSpecifiers)})`
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};
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}
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const moduleName = moduleAndSpecifiers[0];
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return {
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expression: `require(${JSON.stringify(moduleName)})${propertyAccess(
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moduleAndSpecifiers,
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1
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)}`
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};
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};
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/**
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* @param {string|string[]} moduleAndSpecifiers the module request
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* @returns {SourceData} the generated source
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*/
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const getSourceForCommonJsExternalInNodeModule = moduleAndSpecifiers => {
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const chunkInitFragments = [
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new InitFragment(
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'import { createRequire as __WEBPACK_EXTERNAL_createRequire } from "module";\n',
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InitFragment.STAGE_HARMONY_IMPORTS,
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0,
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"external module node-commonjs"
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)
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];
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if (!Array.isArray(moduleAndSpecifiers)) {
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return {
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expression: `__WEBPACK_EXTERNAL_createRequire(import.meta.url)(${JSON.stringify(
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moduleAndSpecifiers
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)})`,
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chunkInitFragments
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};
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}
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const moduleName = moduleAndSpecifiers[0];
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return {
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expression: `__WEBPACK_EXTERNAL_createRequire(import.meta.url)(${JSON.stringify(
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moduleName
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)})${propertyAccess(moduleAndSpecifiers, 1)}`,
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chunkInitFragments
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};
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};
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/**
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* @param {string|string[]} moduleAndSpecifiers the module request
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* @param {RuntimeTemplate} runtimeTemplate the runtime template
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* @returns {SourceData} the generated source
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*/
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const getSourceForImportExternal = (moduleAndSpecifiers, runtimeTemplate) => {
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const importName = runtimeTemplate.outputOptions.importFunctionName;
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if (!runtimeTemplate.supportsDynamicImport() && importName === "import") {
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throw new Error(
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"The target environment doesn't support 'import()' so it's not possible to use external type 'import'"
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);
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}
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if (!Array.isArray(moduleAndSpecifiers)) {
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return {
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expression: `${importName}(${JSON.stringify(moduleAndSpecifiers)});`
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};
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}
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if (moduleAndSpecifiers.length === 1) {
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return {
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expression: `${importName}(${JSON.stringify(moduleAndSpecifiers[0])});`
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};
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}
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const moduleName = moduleAndSpecifiers[0];
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return {
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expression: `${importName}(${JSON.stringify(
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moduleName
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)}).then(${runtimeTemplate.returningFunction(
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`module${propertyAccess(moduleAndSpecifiers, 1)}`,
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"module"
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)});`
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};
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};
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class ModuleExternalInitFragment extends InitFragment {
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/**
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* @param {string} request import source
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* @param {string=} ident recomputed ident
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* @param {string | HashConstructor=} hashFunction the hash function to use
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*/
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constructor(request, ident, hashFunction = "md4") {
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if (ident === undefined) {
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ident = Template.toIdentifier(request);
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if (ident !== request) {
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ident += `_${createHash(hashFunction)
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.update(request)
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.digest("hex")
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.slice(0, 8)}`;
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}
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}
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const identifier = `__WEBPACK_EXTERNAL_MODULE_${ident}__`;
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super(
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`import * as ${identifier} from ${JSON.stringify(request)};\n`,
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InitFragment.STAGE_HARMONY_IMPORTS,
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0,
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`external module import ${ident}`
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);
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this._ident = ident;
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this._identifier = identifier;
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this._request = request;
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}
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getNamespaceIdentifier() {
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return this._identifier;
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}
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}
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register(
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ModuleExternalInitFragment,
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"webpack/lib/ExternalModule",
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"ModuleExternalInitFragment",
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{
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serialize(obj, { write }) {
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write(obj._request);
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write(obj._ident);
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},
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deserialize({ read }) {
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return new ModuleExternalInitFragment(read(), read());
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}
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}
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);
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const generateModuleRemapping = (input, exportsInfo, runtime) => {
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if (exportsInfo.otherExportsInfo.getUsed(runtime) === UsageState.Unused) {
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const properties = [];
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for (const exportInfo of exportsInfo.orderedExports) {
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const used = exportInfo.getUsedName(exportInfo.name, runtime);
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if (!used) continue;
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const nestedInfo = exportInfo.getNestedExportsInfo();
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if (nestedInfo) {
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const nestedExpr = generateModuleRemapping(
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`${input}${propertyAccess([exportInfo.name])}`,
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nestedInfo
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);
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if (nestedExpr) {
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properties.push(`[${JSON.stringify(used)}]: y(${nestedExpr})`);
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continue;
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}
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}
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properties.push(
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`[${JSON.stringify(used)}]: () => ${input}${propertyAccess([
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exportInfo.name
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])}`
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);
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}
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return `x({ ${properties.join(", ")} })`;
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}
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};
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/**
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* @param {string|string[]} moduleAndSpecifiers the module request
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* @param {ExportsInfo} exportsInfo exports info of this module
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* @param {RuntimeSpec} runtime the runtime
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* @param {string | HashConstructor=} hashFunction the hash function to use
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* @returns {SourceData} the generated source
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*/
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const getSourceForModuleExternal = (
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moduleAndSpecifiers,
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exportsInfo,
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runtime,
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hashFunction
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) => {
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if (!Array.isArray(moduleAndSpecifiers))
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moduleAndSpecifiers = [moduleAndSpecifiers];
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const initFragment = new ModuleExternalInitFragment(
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moduleAndSpecifiers[0],
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undefined,
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hashFunction
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);
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const baseAccess = `${initFragment.getNamespaceIdentifier()}${propertyAccess(
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moduleAndSpecifiers,
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1
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)}`;
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const moduleRemapping = generateModuleRemapping(
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baseAccess,
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exportsInfo,
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runtime
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);
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let expression = moduleRemapping || baseAccess;
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return {
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expression,
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init: `var x = y => { var x = {}; ${RuntimeGlobals.definePropertyGetters}(x, y); return x; }\nvar y = x => () => x`,
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runtimeRequirements: moduleRemapping
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? RUNTIME_REQUIREMENTS_FOR_MODULE
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: undefined,
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chunkInitFragments: [initFragment]
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};
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};
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/**
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* @param {string|string[]} urlAndGlobal the script request
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* @param {RuntimeTemplate} runtimeTemplate the runtime template
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* @returns {SourceData} the generated source
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*/
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const getSourceForScriptExternal = (urlAndGlobal, runtimeTemplate) => {
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if (typeof urlAndGlobal === "string") {
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urlAndGlobal = extractUrlAndGlobal(urlAndGlobal);
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}
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const url = urlAndGlobal[0];
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const globalName = urlAndGlobal[1];
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return {
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init: "var __webpack_error__ = new Error();",
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expression: `new Promise(${runtimeTemplate.basicFunction(
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"resolve, reject",
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[
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`if(typeof ${globalName} !== "undefined") return resolve();`,
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`${RuntimeGlobals.loadScript}(${JSON.stringify(
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url
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)}, ${runtimeTemplate.basicFunction("event", [
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`if(typeof ${globalName} !== "undefined") return resolve();`,
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"var errorType = event && (event.type === 'load' ? 'missing' : event.type);",
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"var realSrc = event && event.target && event.target.src;",
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"__webpack_error__.message = 'Loading script failed.\\n(' + errorType + ': ' + realSrc + ')';",
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"__webpack_error__.name = 'ScriptExternalLoadError';",
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"__webpack_error__.type = errorType;",
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"__webpack_error__.request = realSrc;",
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"reject(__webpack_error__);"
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])}, ${JSON.stringify(globalName)});`
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]
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)}).then(${runtimeTemplate.returningFunction(
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`${globalName}${propertyAccess(urlAndGlobal, 2)}`
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)})`,
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runtimeRequirements: RUNTIME_REQUIREMENTS_FOR_SCRIPT
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};
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};
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/**
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* @param {string} variableName the variable name to check
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* @param {string} request the request path
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* @param {RuntimeTemplate} runtimeTemplate the runtime template
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* @returns {string} the generated source
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*/
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const checkExternalVariable = (variableName, request, runtimeTemplate) => {
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return `if(typeof ${variableName} === 'undefined') { ${runtimeTemplate.throwMissingModuleErrorBlock(
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{ request }
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)} }\n`;
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};
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/**
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* @param {string|number} id the module id
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* @param {boolean} optional true, if the module is optional
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* @param {string|string[]} request the request path
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* @param {RuntimeTemplate} runtimeTemplate the runtime template
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* @returns {SourceData} the generated source
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*/
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const getSourceForAmdOrUmdExternal = (
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id,
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optional,
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request,
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runtimeTemplate
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) => {
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const externalVariable = `__WEBPACK_EXTERNAL_MODULE_${Template.toIdentifier(
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`${id}`
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)}__`;
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return {
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init: optional
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? checkExternalVariable(
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externalVariable,
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Array.isArray(request) ? request.join(".") : request,
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runtimeTemplate
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)
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: undefined,
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expression: externalVariable
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};
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};
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/**
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* @param {boolean} optional true, if the module is optional
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* @param {string|string[]} request the request path
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* @param {RuntimeTemplate} runtimeTemplate the runtime template
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* @returns {SourceData} the generated source
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*/
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const getSourceForDefaultCase = (optional, request, runtimeTemplate) => {
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if (!Array.isArray(request)) {
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// make it an array as the look up works the same basically
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request = [request];
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}
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const variableName = request[0];
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const objectLookup = propertyAccess(request, 1);
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return {
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init: optional
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? checkExternalVariable(variableName, request.join("."), runtimeTemplate)
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: undefined,
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expression: `${variableName}${objectLookup}`
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};
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};
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class ExternalModule extends Module {
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constructor(request, type, userRequest) {
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super("javascript/dynamic", null);
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// Info from Factory
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/** @type {string | string[] | Record<string, string | string[]>} */
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this.request = request;
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/** @type {string} */
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this.externalType = type;
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/** @type {string} */
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this.userRequest = userRequest;
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}
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/**
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* @returns {Set<string>} types available (do not mutate)
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*/
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getSourceTypes() {
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return TYPES;
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}
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/**
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* @param {LibIdentOptions} options options
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* @returns {string | null} an identifier for library inclusion
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*/
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libIdent(options) {
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return this.userRequest;
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}
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/**
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* @param {Chunk} chunk the chunk which condition should be checked
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* @param {Compilation} compilation the compilation
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* @returns {boolean} true, if the chunk is ok for the module
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*/
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chunkCondition(chunk, { chunkGraph }) {
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return chunkGraph.getNumberOfEntryModules(chunk) > 0;
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}
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/**
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* @returns {string} a unique identifier of the module
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*/
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identifier() {
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return `external ${this.externalType} ${JSON.stringify(this.request)}`;
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}
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/**
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* @param {RequestShortener} requestShortener the request shortener
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* @returns {string} a user readable identifier of the module
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*/
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readableIdentifier(requestShortener) {
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return "external " + JSON.stringify(this.request);
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}
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/**
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* @param {NeedBuildContext} context context info
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* @param {function(WebpackError=, boolean=): void} callback callback function, returns true, if the module needs a rebuild
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* @returns {void}
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*/
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needBuild(context, callback) {
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return callback(null, !this.buildMeta);
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}
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/**
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* @param {WebpackOptions} options webpack options
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* @param {Compilation} compilation the compilation
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* @param {ResolverWithOptions} resolver the resolver
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* @param {InputFileSystem} fs the file system
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* @param {function(WebpackError=): void} callback callback function
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* @returns {void}
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*/
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build(options, compilation, resolver, fs, callback) {
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this.buildMeta = {
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async: false,
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exportsType: undefined
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};
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this.buildInfo = {
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strict: true,
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topLevelDeclarations: new Set(),
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module: compilation.outputOptions.module
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};
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const { request, externalType } = this._getRequestAndExternalType();
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this.buildMeta.exportsType = "dynamic";
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let canMangle = false;
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this.clearDependenciesAndBlocks();
|
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switch (externalType) {
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case "this":
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this.buildInfo.strict = false;
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break;
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case "system":
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if (!Array.isArray(request) || request.length === 1) {
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this.buildMeta.exportsType = "namespace";
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canMangle = true;
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}
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break;
|
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case "module":
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if (this.buildInfo.module) {
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if (!Array.isArray(request) || request.length === 1) {
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this.buildMeta.exportsType = "namespace";
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canMangle = true;
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}
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} else {
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this.buildMeta.async = true;
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if (!Array.isArray(request) || request.length === 1) {
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this.buildMeta.exportsType = "namespace";
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canMangle = false;
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}
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}
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break;
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case "script":
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case "promise":
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this.buildMeta.async = true;
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break;
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case "import":
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this.buildMeta.async = true;
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if (!Array.isArray(request) || request.length === 1) {
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this.buildMeta.exportsType = "namespace";
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canMangle = false;
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}
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break;
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}
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this.addDependency(new StaticExportsDependency(true, canMangle));
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callback();
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}
|
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|
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restoreFromUnsafeCache(unsafeCacheData, normalModuleFactory) {
|
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this._restoreFromUnsafeCache(unsafeCacheData, normalModuleFactory);
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}
|
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|
|
/**
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|
* @param {ConcatenationBailoutReasonContext} context context
|
|
* @returns {string | undefined} reason why this module can't be concatenated, undefined when it can be concatenated
|
|
*/
|
|
getConcatenationBailoutReason({ moduleGraph }) {
|
|
switch (this.externalType) {
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|
case "amd":
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case "amd-require":
|
|
case "umd":
|
|
case "umd2":
|
|
case "system":
|
|
case "jsonp":
|
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return `${this.externalType} externals can't be concatenated`;
|
|
}
|
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return undefined;
|
|
}
|
|
|
|
_getRequestAndExternalType() {
|
|
let { request, externalType } = this;
|
|
if (typeof request === "object" && !Array.isArray(request))
|
|
request = request[externalType];
|
|
return { request, externalType };
|
|
}
|
|
|
|
_getSourceData(runtimeTemplate, moduleGraph, chunkGraph, runtime) {
|
|
const { request, externalType } = this._getRequestAndExternalType();
|
|
switch (externalType) {
|
|
case "this":
|
|
case "window":
|
|
case "self":
|
|
return getSourceForGlobalVariableExternal(request, this.externalType);
|
|
case "global":
|
|
return getSourceForGlobalVariableExternal(
|
|
request,
|
|
runtimeTemplate.globalObject
|
|
);
|
|
case "commonjs":
|
|
case "commonjs2":
|
|
case "commonjs-module":
|
|
return getSourceForCommonJsExternal(request);
|
|
case "node-commonjs":
|
|
return this.buildInfo.module
|
|
? getSourceForCommonJsExternalInNodeModule(request)
|
|
: getSourceForCommonJsExternal(request);
|
|
case "amd":
|
|
case "amd-require":
|
|
case "umd":
|
|
case "umd2":
|
|
case "system":
|
|
case "jsonp": {
|
|
const id = chunkGraph.getModuleId(this);
|
|
return getSourceForAmdOrUmdExternal(
|
|
id !== null ? id : this.identifier(),
|
|
this.isOptional(moduleGraph),
|
|
request,
|
|
runtimeTemplate
|
|
);
|
|
}
|
|
case "import":
|
|
return getSourceForImportExternal(request, runtimeTemplate);
|
|
case "script":
|
|
return getSourceForScriptExternal(request, runtimeTemplate);
|
|
case "module": {
|
|
if (!this.buildInfo.module) {
|
|
if (!runtimeTemplate.supportsDynamicImport()) {
|
|
throw new Error(
|
|
"The target environment doesn't support dynamic import() syntax so it's not possible to use external type 'module' within a script" +
|
|
(runtimeTemplate.supportsEcmaScriptModuleSyntax()
|
|
? "\nDid you mean to build a EcmaScript Module ('output.module: true')?"
|
|
: "")
|
|
);
|
|
}
|
|
return getSourceForImportExternal(request, runtimeTemplate);
|
|
}
|
|
if (!runtimeTemplate.supportsEcmaScriptModuleSyntax()) {
|
|
throw new Error(
|
|
"The target environment doesn't support EcmaScriptModule syntax so it's not possible to use external type 'module'"
|
|
);
|
|
}
|
|
return getSourceForModuleExternal(
|
|
request,
|
|
moduleGraph.getExportsInfo(this),
|
|
runtime,
|
|
runtimeTemplate.outputOptions.hashFunction
|
|
);
|
|
}
|
|
case "var":
|
|
case "promise":
|
|
case "const":
|
|
case "let":
|
|
case "assign":
|
|
default:
|
|
return getSourceForDefaultCase(
|
|
this.isOptional(moduleGraph),
|
|
request,
|
|
runtimeTemplate
|
|
);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @param {CodeGenerationContext} context context for code generation
|
|
* @returns {CodeGenerationResult} result
|
|
*/
|
|
codeGeneration({
|
|
runtimeTemplate,
|
|
moduleGraph,
|
|
chunkGraph,
|
|
runtime,
|
|
concatenationScope
|
|
}) {
|
|
const sourceData = this._getSourceData(
|
|
runtimeTemplate,
|
|
moduleGraph,
|
|
chunkGraph,
|
|
runtime
|
|
);
|
|
|
|
let sourceString = sourceData.expression;
|
|
if (sourceData.iife)
|
|
sourceString = `(function() { return ${sourceString}; }())`;
|
|
if (concatenationScope) {
|
|
sourceString = `${runtimeTemplate.supportsConst() ? "const" : "var"} ${
|
|
ConcatenationScope.NAMESPACE_OBJECT_EXPORT
|
|
} = ${sourceString};`;
|
|
concatenationScope.registerNamespaceExport(
|
|
ConcatenationScope.NAMESPACE_OBJECT_EXPORT
|
|
);
|
|
} else {
|
|
sourceString = `module.exports = ${sourceString};`;
|
|
}
|
|
if (sourceData.init) sourceString = `${sourceData.init}\n${sourceString}`;
|
|
|
|
let data = undefined;
|
|
if (sourceData.chunkInitFragments) {
|
|
data = new Map();
|
|
data.set("chunkInitFragments", sourceData.chunkInitFragments);
|
|
}
|
|
|
|
const sources = new Map();
|
|
if (this.useSourceMap || this.useSimpleSourceMap) {
|
|
sources.set(
|
|
"javascript",
|
|
new OriginalSource(sourceString, this.identifier())
|
|
);
|
|
} else {
|
|
sources.set("javascript", new RawSource(sourceString));
|
|
}
|
|
|
|
let runtimeRequirements = sourceData.runtimeRequirements;
|
|
if (!concatenationScope) {
|
|
if (!runtimeRequirements) {
|
|
runtimeRequirements = RUNTIME_REQUIREMENTS;
|
|
} else {
|
|
const set = new Set(runtimeRequirements);
|
|
set.add(RuntimeGlobals.module);
|
|
runtimeRequirements = set;
|
|
}
|
|
}
|
|
|
|
return {
|
|
sources,
|
|
runtimeRequirements: runtimeRequirements || EMPTY_RUNTIME_REQUIREMENTS,
|
|
data
|
|
};
|
|
}
|
|
|
|
/**
|
|
* @param {string=} type the source type for which the size should be estimated
|
|
* @returns {number} the estimated size of the module (must be non-zero)
|
|
*/
|
|
size(type) {
|
|
return 42;
|
|
}
|
|
|
|
/**
|
|
* @param {Hash} hash the hash used to track dependencies
|
|
* @param {UpdateHashContext} context context
|
|
* @returns {void}
|
|
*/
|
|
updateHash(hash, context) {
|
|
const { chunkGraph } = context;
|
|
hash.update(
|
|
`${this.externalType}${JSON.stringify(this.request)}${this.isOptional(
|
|
chunkGraph.moduleGraph
|
|
)}`
|
|
);
|
|
super.updateHash(hash, context);
|
|
}
|
|
|
|
serialize(context) {
|
|
const { write } = context;
|
|
|
|
write(this.request);
|
|
write(this.externalType);
|
|
write(this.userRequest);
|
|
|
|
super.serialize(context);
|
|
}
|
|
|
|
deserialize(context) {
|
|
const { read } = context;
|
|
|
|
this.request = read();
|
|
this.externalType = read();
|
|
this.userRequest = read();
|
|
|
|
super.deserialize(context);
|
|
}
|
|
}
|
|
|
|
makeSerializable(ExternalModule, "webpack/lib/ExternalModule");
|
|
|
|
module.exports = ExternalModule;
|