mirror of https://github.com/webpack/webpack.git
102 lines
3.1 KiB
JavaScript
102 lines
3.1 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 ModuleDependency = require("./ModuleDependency");
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const Template = require("../Template");
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class HarmonyImportDependency extends ModuleDependency {
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constructor(request, originModule, sourceOrder, parserScope) {
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super(request);
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this.originModule = originModule;
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this.sourceOrder = sourceOrder;
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this.parserScope = parserScope;
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}
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getReference() {
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if(!this.module) return null;
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return {
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module: this.module,
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importedNames: false,
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weak: this.weak
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};
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}
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getImportVar() {
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let importVarMap = this.parserScope.importVarMap;
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if(!importVarMap) this.parserScope.importVarMap = importVarMap = new Map();
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let importVar = importVarMap.get(this.module);
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if(importVar) return importVar;
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importVar = `${Template.toIdentifier(`${this.userRequest}`)}__WEBPACK_IMPORTED_MODULE_${importVarMap.size}__`;
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importVarMap.set(this.module, importVar);
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return importVar;
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}
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getImportStatement(declare, runtime) {
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const module = this.module;
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const comment = runtime.outputOptions.pathinfo ? Template.toComment(runtime.requestShortener.shorten(this.request)) : "";
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const optDeclaration = declare ? "var " : "";
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const optNewline = declare ? "\n" : " ";
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if(!module) {
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const stringifiedError = JSON.stringify(`Cannot find module "${this.request}"`);
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return `throw new Error(${stringifiedError});${optNewline}`;
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}
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const importVar = this.getImportVar();
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if(importVar) {
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const isHarmonyModule = module.meta && module.meta.harmonyModule;
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const content = `/* harmony import */ ${optDeclaration}${importVar} = __webpack_require__(${comment}${JSON.stringify(module.id)});${optNewline}`;
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if(isHarmonyModule || this.originModule.meta.strictHarmonyModule) {
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return content;
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}
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return `${content}/* harmony import */ ${optDeclaration}${importVar}_default = /*#__PURE__*/__webpack_require__.n(${importVar});${optNewline}`;
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}
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return "";
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}
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updateHash(hash) {
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super.updateHash(hash);
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const importedModule = this.module;
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hash.update((importedModule && (!importedModule.meta || importedModule.meta.harmonyModule)) + "");
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hash.update((importedModule && importedModule.id) + "");
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}
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}
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module.exports = HarmonyImportDependency;
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const importEmittedMap = new WeakMap();
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HarmonyImportDependency.Template = class HarmonyImportDependencyTemplate {
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apply() {}
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getHarmonyInitOrder(dep) {
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return dep.sourceOrder;
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}
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static isImportEmitted(dep, source) {
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let sourceInfo = importEmittedMap.get(source);
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if(!sourceInfo) return false;
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const key = dep.module || dep.request;
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return key && sourceInfo.emittedImports.get(key);
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}
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harmonyInit(dep, source, runtime) {
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let sourceInfo = importEmittedMap.get(source);
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if(!sourceInfo) {
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importEmittedMap.set(source, sourceInfo = {
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emittedImports: new Map()
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});
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}
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const key = dep.module || dep.request;
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if(key && sourceInfo.emittedImports.get(key)) return;
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sourceInfo.emittedImports.set(key, true);
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const content = dep.getImportStatement(true, runtime);
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source.insert(-1, content);
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}
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};
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