mirror of https://github.com/webpack/webpack.git
619 lines
21 KiB
JavaScript
619 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 Module = require("../Module");
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const Template = require("../Template");
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const Parser = require("../Parser");
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const acorn = require("acorn");
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const escope = require("escope");
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const ReplaceSource = require("webpack-sources/lib/ReplaceSource");
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const ConcatSource = require("webpack-sources/lib/ConcatSource");
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const HarmonyImportDependency = require("../dependencies/HarmonyImportDependency");
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const HarmonyImportSpecifierDependency = require("../dependencies/HarmonyImportSpecifierDependency");
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const HarmonyExportSpecifierDependency = require("../dependencies/HarmonyExportSpecifierDependency");
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const HarmonyExportExpressionDependency = require("../dependencies/HarmonyExportExpressionDependency");
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const HarmonyExportImportedSpecifierDependency = require("../dependencies/HarmonyExportImportedSpecifierDependency");
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const HarmonyCompatibilityDependency = require("../dependencies/HarmonyCompatibilityDependency");
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const HarmonyModulesHelpers = require("../dependencies/HarmonyModulesHelpers");
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function getFinalName(info, exportName, moduleToInfoMap, requestShortener) {
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const directExport = info.exportMap.get(exportName);
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if(directExport) {
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if(exportName === true)
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info.needNamespaceObject = true;
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const name = info.internalNames.get(directExport);
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if(!name)
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throw new Error(`The export "${directExport}" in "${info.module.readableIdentifier(requestShortener)}" has no internal name`);
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return name;
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}
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const reexport = info.reexportMap.get(exportName);
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if(reexport) {
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const refInfo = moduleToInfoMap.get(reexport.module);
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if(refInfo) {
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// module is in the concatenation
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return getFinalName(refInfo, reexport.exportName, moduleToInfoMap, requestShortener);
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} else {
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const dep = reexport.dependency;
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const importedModule = reexport.module;
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const exportName = reexport.exportName;
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const isHarmonyModule = importedModule && (!importedModule.meta || importedModule.meta.harmonyModule);
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const importedVar = dep.importedVar;
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const used = importedModule.isUsed(exportName);
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if(!used) return "/* unused reexport */undefined";
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if(!isHarmonyModule && exportName === "default") {
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return `${importedVar}_default.a`;
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}
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return `${importedVar}[${JSON.stringify(used)}]`;
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}
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}
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throw new Error(`Cannot get final name for export "${exportName}" in "${info.module.readableIdentifier(requestShortener)}"` +
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` (known exports: ${Array.from(info.exportMap.keys()).join(" ")}, ` +
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`known reexports: ${Array.from(info.reexportMap.keys()).join(" ")})`);
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}
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function getSymbolsFromScope(s, untilScope) {
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const allUsedNames = new Set();
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let scope = s;
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while(scope) {
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if(untilScope === scope) break;
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scope.variables.forEach(variable => allUsedNames.add(variable.name));
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scope = scope.upper;
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}
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return allUsedNames;
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}
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function getAllReferences(variable) {
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let set = variable.references;
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// Look for inner scope variables too (like in class Foo { t() { Foo } })
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const identifiers = new Set(variable.identifiers);
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for(const scope of variable.scope.childScopes) {
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for(const innerVar of scope.variables) {
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if(innerVar.identifiers.some(id => identifiers.has(id))) {
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set = set.concat(innerVar.references);
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break;
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}
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}
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}
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return set;
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}
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function reduceSet(a, b) {
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for(const item of b)
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a.add(item);
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return a;
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}
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function getPathInAst(ast, node) {
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if(ast === node) {
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return [];
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}
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const nr = node.range;
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var i;
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if(Array.isArray(ast)) {
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for(i = 0; i < ast.length; i++) {
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const enterResult = enterNode(ast[i]);
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if(typeof enterResult !== "undefined")
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return enterResult;
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}
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} else if(ast && typeof ast === "object") {
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const keys = Object.keys(ast);
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for(i = 0; i < keys.length; i++) {
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const value = ast[keys[i]];
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if(Array.isArray(value)) {
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const pathResult = getPathInAst(value, node);
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if(typeof pathResult !== "undefined")
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return pathResult;
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} else if(value && typeof value === "object") {
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const enterResult = enterNode(value);
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if(typeof enterResult !== "undefined")
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return enterResult;
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}
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}
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}
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function enterNode(n) {
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const r = n.range;
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if(r) {
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if(r[0] <= nr[0] && r[1] >= nr[1]) {
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const path = getPathInAst(n, node);
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if(path) {
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path.push(n);
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return path;
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}
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}
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}
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return undefined;
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}
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}
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class ConcatenatedModule extends Module {
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constructor(rootModule, modules) {
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super();
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super.setChunks(rootModule._chunks);
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this.rootModule = rootModule;
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this.modules = modules;
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this.usedExports = rootModule.usedExports;
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this.providedExports = rootModule.providedExports;
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this.optimizationBailout = rootModule.optimizationBailout;
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this.used = rootModule.used;
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this.index = rootModule.index;
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this.index2 = rootModule.index2;
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this.depth = rootModule.depth;
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this.built = modules.some(m => m.built);
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this.cacheable = modules.every(m => m.cacheable);
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const modulesSet = new Set(modules);
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this.reasons = rootModule.reasons.filter(reason => !modulesSet.has(reason.module));
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this.meta = rootModule.meta;
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this.moduleArgument = rootModule.moduleArgument;
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this.exportsArgument = rootModule.exportsArgument;
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this.strict = true;
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this.dependencies = [];
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this.dependenciesWarnings = [];
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this.dependenciesErrors = [];
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this.fileDependencies = [];
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this.contextDependencies = [];
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this.warnings = [];
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this.errors = [];
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this.assets = {};
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for(const m of modules) {
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// populate dependencies
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m.dependencies.filter(dep => !modulesSet.has(dep.module))
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.forEach(d => this.dependencies.push(d));
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// populate dep warning
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m.dependenciesWarnings.forEach(depWarning => this.dependenciesWarnings.push(depWarning));
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// populate dep errors
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m.dependenciesErrors.forEach(depError => this.dependenciesErrors.push(depError));
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// populate file dependencies
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if(m.fileDependencies) m.fileDependencies.forEach(file => this.fileDependencies.push(file));
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// populate context dependencies
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if(m.contextDependencies) m.contextDependencies.forEach(context => this.contextDependencies.push(context));
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// populate warnings
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m.warnings.forEach(warning => this.warnings.push(warning));
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// populate errors
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m.errors.forEach(error => this.errors.push(error));
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Object.assign(this.assets, m.assets);
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}
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}
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identifier() {
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return this.modules.map(m => m.identifier()).join(" ");
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}
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readableIdentifier(requestShortener) {
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return this.rootModule.readableIdentifier(requestShortener) + ` + ${this.modules.length - 1} modules`;
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}
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libIdent(options) {
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return this.rootModule.libIdent(options);
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}
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nameForCondition() {
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return this.rootModule.nameForCondition();
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}
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build(options, compilation, resolver, fs, callback) {
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throw new Error("Cannot build this module. It should be already built.");
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}
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size() {
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// Guess size from embedded modules
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return this.modules.reduce((sum, m) => sum + m.size(), 0);
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}
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source(dependencyTemplates, outputOptions, requestShortener) {
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const modulesSet = new Set();
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this.modules.forEach(m => modulesSet.add(m));
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// Metainfo for each module
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const modulesWithInfo = this.modules.map((m, idx) => {
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const exportMap = new Map();
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const reexportMap = new Map();
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m.dependencies.forEach(dep => {
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if(dep instanceof HarmonyExportSpecifierDependency) {
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exportMap.set(dep.name, dep.id);
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} else if(dep instanceof HarmonyExportExpressionDependency) {
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exportMap.set("default", "__WEBPACK_MODULE_DEFAULT_EXPORT__");
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} else if(dep instanceof HarmonyExportImportedSpecifierDependency) {
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const exportName = dep.name;
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const importName = dep.id;
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const importModule = dep.importDependency.module;
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const innerReexport = modulesSet.has(importModule);
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if(exportName && importName) {
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reexportMap.set(exportName, {
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module: importModule,
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exportName: importName,
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dependency: dep
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});
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} else if(exportName) {
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reexportMap.set(exportName, {
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module: importModule,
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exportName: true,
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dependency: dep
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});
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} else if(Array.isArray(importModule.providedExports)) {
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var activeExports = new Set(HarmonyModulesHelpers.getActiveExports(dep.originModule, dep));
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importModule.providedExports.forEach(name => {
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if(activeExports.has(name) || name === "default")
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return;
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reexportMap.set(name, {
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module: importModule,
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exportName: name,
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dependency: dep
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});
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});
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} else if(innerReexport) {
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throw new Error(`Module "${importModule.readableIdentifier(requestShortener)}" doesn't provide static exports for "export *" in ${m.readableIdentifier(requestShortener)}`);
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}
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}
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});
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return {
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module: m,
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index: idx,
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ast: undefined,
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source: undefined,
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globalScope: undefined,
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moduleScope: undefined,
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internalNames: new Map(),
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exportMap: exportMap,
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reexportMap: reexportMap,
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needCompatibilityFlag: false,
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needNamespaceObject: false,
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namespaceObjectSource: null
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};
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});
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// Create mapping from module to info
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const moduleToInfoMap = new Map();
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modulesWithInfo.forEach(m => moduleToInfoMap.set(m.module, m));
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// Configure template decorators for dependencies
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const innerDependencyTemplates = new Map(dependencyTemplates);
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innerDependencyTemplates.set(HarmonyImportSpecifierDependency, new HarmonyImportSpecifierDependencyConcatenatedTemplate(
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dependencyTemplates.get(HarmonyImportSpecifierDependency),
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moduleToInfoMap
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));
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innerDependencyTemplates.set(HarmonyImportDependency, new HarmonyImportDependencyConcatenatedTemplate(
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dependencyTemplates.get(HarmonyImportDependency),
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moduleToInfoMap
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));
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innerDependencyTemplates.set(HarmonyExportSpecifierDependency, new HarmonyExportSpecifierDependencyConcatenatedTemplate(
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dependencyTemplates.get(HarmonyExportSpecifierDependency),
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this.rootModule
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));
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innerDependencyTemplates.set(HarmonyExportExpressionDependency, new HarmonyExportExpressionDependencyConcatenatedTemplate(
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dependencyTemplates.get(HarmonyExportExpressionDependency),
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this.rootModule,
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moduleToInfoMap
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));
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innerDependencyTemplates.set(HarmonyExportImportedSpecifierDependency, new HarmonyExportImportedSpecifierDependencyConcatenatedTemplate(
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dependencyTemplates.get(HarmonyExportImportedSpecifierDependency),
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this.rootModule,
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moduleToInfoMap
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));
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innerDependencyTemplates.set(HarmonyCompatibilityDependency, new HarmonyCompatibilityDependencyConcatenatedTemplate(
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dependencyTemplates.get(HarmonyCompatibilityDependency),
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this.rootModule,
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moduleToInfoMap
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));
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// Generate source code and analyse scopes
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// Prepare a ReplaceSource for the final source
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modulesWithInfo.forEach(info => {
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const m = info.module;
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const source = m.source(innerDependencyTemplates, outputOptions, requestShortener);
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const code = source.source();
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const ast = acorn.parse(code, {
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ranges: true,
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locations: true,
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ecmaVersion: Parser.ECMA_VERSION,
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sourceType: "module"
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});
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const scopeManager = escope.analyze(ast, {
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ecmaVersion: 6,
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sourceType: "module",
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optimistic: true,
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ignoreEval: true,
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impliedStrict: true
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});
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const globalScope = scopeManager.acquire(ast);
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const moduleScope = globalScope.childScopes[0];
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const resultSource = new ReplaceSource(source);
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info.ast = ast;
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info.source = resultSource;
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info.globalScope = globalScope;
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info.moduleScope = moduleScope;
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});
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// List of all used names to avoid conflicts
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const allUsedNames = new Set(["__WEBPACK_MODULE_DEFAULT_EXPORT__", "defaultExport", "Object"]);
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// get all global names
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modulesWithInfo.forEach(info => {
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info.globalScope.through.forEach(reference => {
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const name = reference.identifier.name;
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if(/^__WEBPACK_MODULE_REFERENCE__\d+_(\d+|ns)__$/.test(name)) {
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for(const s of getSymbolsFromScope(reference.from, info.moduleScope)) {
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allUsedNames.add(s);
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}
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} else {
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allUsedNames.add(name);
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}
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});
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});
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modulesWithInfo.forEach(info => {
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const namespaceObjectName = this.findNewName("namespaceObject", allUsedNames, null, info.module.readableIdentifier(requestShortener));
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allUsedNames.add(namespaceObjectName);
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info.internalNames.set(namespaceObjectName, namespaceObjectName);
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info.exportMap.set(true, namespaceObjectName);
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info.moduleScope.variables.forEach(variable => {
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const name = variable.name;
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if(allUsedNames.has(name)) {
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const references = getAllReferences(variable);
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const symbolsInReferences = references.map(ref => getSymbolsFromScope(ref.from, info.moduleScope)).reduce(reduceSet, new Set());
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const newName = this.findNewName(name, allUsedNames, symbolsInReferences, info.module.readableIdentifier(requestShortener));
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allUsedNames.add(newName);
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info.internalNames.set(name, newName);
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const source = info.source;
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const allIdentifiers = new Set(references.map(r => r.identifier).concat(variable.identifiers));
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for(const identifier of allIdentifiers) {
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const r = identifier.range;
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const path = getPathInAst(info.ast, identifier);
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if(path && path.length > 1 && path[1].type === "Property" && path[1].shorthand) {
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source.insert(r[1], `: ${newName}`);
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} else {
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source.replace(r[0], r[1] - 1, newName);
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}
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}
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} else {
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allUsedNames.add(name);
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info.internalNames.set(name, name);
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}
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});
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});
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modulesWithInfo.forEach(info => {
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info.globalScope.through.forEach(reference => {
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const name = reference.identifier.name;
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const match = /^__WEBPACK_MODULE_REFERENCE__(\d+)_(\d+|ns)__$/.exec(name);
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if(match) {
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const referencedModule = modulesWithInfo[+match[1]];
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let exportName;
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if(match[2] === "ns") {
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exportName = true;
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} else {
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const exportIdx = +match[2];
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exportName = referencedModule.module.providedExports[exportIdx];
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}
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const finalName = getFinalName(referencedModule, exportName, moduleToInfoMap, requestShortener);
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const r = reference.identifier.range;
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const source = info.source;
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source.replace(r[0], r[1] - 1, finalName);
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}
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});
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});
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const result = new ConcatSource();
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if(moduleToInfoMap.get(this.rootModule).needCompatibilityFlag) {
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result.add(`Object.defineProperty(${this.rootModule.exportsArgument || "exports"}, "__esModule", { value: true });\n`);
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}
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let generated = true;
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const ensureNsObjSource = info => {
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if(info.needNamespaceObject && !info.namespaceObjectSource) {
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const name = info.exportMap.get(true);
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const nsObj = [`var ${name} = {};`];
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for(const exportName of info.module.providedExports) {
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const finalName = getFinalName(info, exportName, moduleToInfoMap, requestShortener);
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nsObj.push(`__webpack_require__.d(${name}, ${JSON.stringify(exportName)}, function() { return ${finalName}; });`);
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}
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info.namespaceObjectSource = nsObj.join("\n") + "\n";
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generated = true;
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}
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};
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while(generated) {
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generated = false;
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modulesWithInfo.forEach(ensureNsObjSource);
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}
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modulesWithInfo.forEach(info => {
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result.add(`\n// CONCATENATED MODULE: ${info.module.readableIdentifier(requestShortener)}\n`);
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if(info.namespaceObjectSource) {
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result.add(info.namespaceObjectSource);
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}
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result.add(info.source);
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});
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return result;
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}
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findNewName(oldName, usedNamed1, usedNamed2, extraInfo) {
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let name = oldName;
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if(name === "__WEBPACK_MODULE_DEFAULT_EXPORT__")
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name = "defaultExport";
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// Remove uncool stuff
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extraInfo = extraInfo.replace(/(\/index)?\.([a-zA-Z0-9]{1,4})$/, "");
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const splittedInfo = extraInfo.split("/");
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while(splittedInfo.length) {
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name = splittedInfo.pop() + "_" + name;
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const nameIdent = Template.toIdentifier(name);
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if(!usedNamed1.has(nameIdent) && (!usedNamed2 || !usedNamed2.has(nameIdent))) return nameIdent;
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}
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while(usedNamed1.has(name = name + "_") || (usedNamed2 && usedNamed2.has(name))) { /* do nothing */ }
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return name;
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}
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}
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class HarmonyImportSpecifierDependencyConcatenatedTemplate {
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constructor(originalTemplate, modulesMap) {
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this.originalTemplate = originalTemplate;
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this.modulesMap = modulesMap;
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}
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apply(dep, source, outputOptions, requestShortener, dependencyTemplates) {
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const module = dep.importDependency.module;
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const info = this.modulesMap.get(module);
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if(!info) {
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this.originalTemplate.apply(dep, source, outputOptions, requestShortener, dependencyTemplates);
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return;
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}
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if(!Array.isArray(module.providedExports))
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throw new Error(`Module ${module.resource} has no static exports ${module.providedExports}`);
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let content;
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if(dep.id === null) {
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content = `__WEBPACK_MODULE_REFERENCE__${info.index}_ns__`;
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} else {
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const exportIdx = (module.providedExports).indexOf(dep.id);
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content = exportIdx === -1 ? "undefined" : `__WEBPACK_MODULE_REFERENCE__${info.index}_${exportIdx}__`;
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}
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if(dep.shorthand) {
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content = dep.name + ": " + content;
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}
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source.replace(dep.range[0], dep.range[1] - 1, content);
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}
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}
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|
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class HarmonyImportDependencyConcatenatedTemplate {
|
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constructor(originalTemplate, modulesMap) {
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this.originalTemplate = originalTemplate;
|
|
this.modulesMap = modulesMap;
|
|
}
|
|
|
|
apply(dep, source, outputOptions, requestShortener, dependencyTemplates) {
|
|
const module = dep.module;
|
|
const info = this.modulesMap.get(module);
|
|
if(!info) {
|
|
this.originalTemplate.apply(dep, source, outputOptions, requestShortener, dependencyTemplates);
|
|
return;
|
|
}
|
|
source.replace(dep.range[0], dep.range[1] - 1, "");
|
|
}
|
|
}
|
|
|
|
class HarmonyExportSpecifierDependencyConcatenatedTemplate {
|
|
constructor(originalTemplate, rootModule) {
|
|
this.originalTemplate = originalTemplate;
|
|
this.rootModule = rootModule;
|
|
}
|
|
|
|
apply(dep, source, outputOptions, requestShortener, dependencyTemplates) {
|
|
if(dep.originModule === this.rootModule) {
|
|
this.originalTemplate.apply(dep, source, outputOptions, requestShortener, dependencyTemplates);
|
|
}
|
|
}
|
|
}
|
|
|
|
class HarmonyExportExpressionDependencyConcatenatedTemplate {
|
|
constructor(originalTemplate, rootModule) {
|
|
this.originalTemplate = originalTemplate;
|
|
this.rootModule = rootModule;
|
|
}
|
|
|
|
apply(dep, source, outputOptions, requestShortener, dependencyTemplates) {
|
|
if(dep.originModule === this.rootModule) {
|
|
this.originalTemplate.apply(dep, source, outputOptions, requestShortener, dependencyTemplates);
|
|
} else {
|
|
const content = "/* harmony default export */ var __WEBPACK_MODULE_DEFAULT_EXPORT__ = ";
|
|
|
|
if(dep.range) {
|
|
source.replace(dep.rangeStatement[0], dep.range[0] - 1, content + "(");
|
|
source.replace(dep.range[1], dep.rangeStatement[1] - 1, ");");
|
|
return;
|
|
}
|
|
|
|
source.replace(dep.rangeStatement[0], dep.rangeStatement[1] - 1, content);
|
|
}
|
|
}
|
|
}
|
|
|
|
class HarmonyExportImportedSpecifierDependencyConcatenatedTemplate {
|
|
constructor(originalTemplate, rootModule, modulesMap) {
|
|
this.originalTemplate = originalTemplate;
|
|
this.rootModule = rootModule;
|
|
this.modulesMap = modulesMap;
|
|
}
|
|
|
|
getExports(dep) {
|
|
const active = HarmonyModulesHelpers.isActive(dep.originModule, dep);
|
|
if(!active) return [];
|
|
const importModule = dep.importDependency.module;
|
|
if(dep.id) {
|
|
// export { named } from "module"
|
|
return [{
|
|
name: dep.name,
|
|
id: dep.id,
|
|
module: importModule
|
|
}];
|
|
}
|
|
if(dep.name) {
|
|
// export * as abc from "module"
|
|
return [{
|
|
name: dep.name,
|
|
id: true,
|
|
module: importModule
|
|
}];
|
|
}
|
|
// export * from "module"
|
|
const activeExports = new Set(HarmonyModulesHelpers.getActiveExports(dep.originModule, dep));
|
|
return importModule.providedExports.filter(exp => exp !== "default" && !activeExports.has(exp)).map(exp => {
|
|
return {
|
|
name: exp,
|
|
id: exp,
|
|
module: importModule
|
|
};
|
|
});
|
|
}
|
|
|
|
apply(dep, source, outputOptions, requestShortener, dependencyTemplates) {
|
|
if(dep.originModule === this.rootModule) {
|
|
if(this.modulesMap.get(dep.importDependency.module)) {
|
|
const exportDefs = this.getExports(dep);
|
|
exportDefs.forEach(def => {
|
|
const info = this.modulesMap.get(def.module);
|
|
const used = dep.originModule.isUsed(def.name);
|
|
if(!used) {
|
|
source.insert(-1, `/* unused concated harmony import ${dep.name} */\n`);
|
|
}
|
|
let finalName;
|
|
if(def.id === true) {
|
|
finalName = `__WEBPACK_MODULE_REFERENCE__${info.index}_ns__`;
|
|
} else {
|
|
const exportIdx = def.module.providedExports.indexOf(def.id);
|
|
finalName = exportIdx < 0 ? "undefined" : `__WEBPACK_MODULE_REFERENCE__${info.index}_${exportIdx}__`;
|
|
}
|
|
const exportsName = this.rootModule.exportsArgument || "exports";
|
|
const content = `/* concated harmony reexport */__webpack_require__.d(${exportsName}, ${JSON.stringify(used)}, function() { return ${finalName}; });\n`;
|
|
source.insert(-1, content);
|
|
});
|
|
} else {
|
|
this.originalTemplate.apply(dep, source, outputOptions, requestShortener, dependencyTemplates);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
class HarmonyCompatibilityDependencyConcatenatedTemplate {
|
|
constructor(originalTemplate, rootModule, modulesMap) {
|
|
this.originalTemplate = originalTemplate;
|
|
this.rootModule = rootModule;
|
|
this.modulesMap = modulesMap;
|
|
}
|
|
|
|
apply(dep, source, outputOptions, requestShortener, dependencyTemplates) {
|
|
if(dep.originModule === this.rootModule) {
|
|
this.modulesMap.get(this.rootModule).needCompatibilityFlag = true;
|
|
}
|
|
}
|
|
}
|
|
|
|
module.exports = ConcatenatedModule;
|