183 lines
4.7 KiB
JavaScript
183 lines
4.7 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 InitFragment = require("../InitFragment");
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const { UsageState } = require("../ModuleGraph");
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const RuntimeGlobals = require("../RuntimeGlobals");
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const makeSerializable = require("../util/makeSerializable");
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const propertyAccess = require("../util/propertyAccess");
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const NullDependency = require("./NullDependency");
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/** @typedef {import("webpack-sources").ReplaceSource} ReplaceSource */
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/** @typedef {import("../Dependency")} Dependency */
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/** @typedef {import("../Dependency").ExportsSpec} ExportsSpec */
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/** @typedef {import("../DependencyTemplate").DependencyTemplateContext} DependencyTemplateContext */
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/** @typedef {import("../ModuleGraph")} ModuleGraph */
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class CommonJsExportsDependency extends NullDependency {
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constructor(range, base, names) {
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super();
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this.range = range;
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this.base = base;
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this.names = names;
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}
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get type() {
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return "cjs exports";
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}
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/**
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* Returns the exported names
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* @param {ModuleGraph} moduleGraph module graph
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* @returns {ExportsSpec | undefined} export names
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*/
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getExports(moduleGraph) {
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return {
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exports: [this.names[0]],
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dependencies: undefined
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};
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}
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serialize(context) {
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const { write } = context;
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write(this.range);
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write(this.base);
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write(this.names);
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super.serialize(context);
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}
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deserialize(context) {
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const { read } = context;
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this.range = read();
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this.base = read();
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this.names = read();
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super.deserialize(context);
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}
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}
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makeSerializable(
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CommonJsExportsDependency,
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"webpack/lib/dependencies/CommonJsExportsDependency"
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);
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CommonJsExportsDependency.Template = class CommonJsExportsDependencyTemplate extends NullDependency.Template {
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/**
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* @param {Dependency} dependency the dependency for which the template should be applied
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* @param {ReplaceSource} source the current replace source which can be modified
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* @param {DependencyTemplateContext} templateContext the context object
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* @returns {void}
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*/
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apply(
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dependency,
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source,
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{ module, moduleGraph, initFragments, runtimeRequirements }
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) {
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const dep = /** @type {CommonJsExportsDependency} */ (dependency);
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let used;
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if (module.buildMeta.exportsType === "default") {
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const defaultInfo = moduleGraph.getExportInfo(module, "default");
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if (defaultInfo.used === UsageState.Used) {
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used = dep.names;
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} else {
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used = defaultInfo.exportsInfo.getUsedName(dep.names);
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}
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} else {
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used = moduleGraph.getExportsInfo(module).getUsedName(dep.names);
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}
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let base = undefined;
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let type;
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switch (dep.base) {
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case "exports":
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runtimeRequirements.add(RuntimeGlobals.exports);
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base = module.exportsArgument;
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type = "expression";
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break;
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case "module.exports":
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runtimeRequirements.add(RuntimeGlobals.module);
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base = `${module.moduleArgument}.exports`;
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type = "expression";
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break;
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case "this":
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runtimeRequirements.add(RuntimeGlobals.thisAsExports);
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base = "this";
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type = "expression";
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break;
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case "Object.defineProperty(exports)":
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runtimeRequirements.add(RuntimeGlobals.exports);
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base = module.exportsArgument;
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type = "Object.defineProperty";
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break;
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case "Object.defineProperty(module.exports)":
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runtimeRequirements.add(RuntimeGlobals.module);
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base = `${module.moduleArgument}.exports`;
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type = "Object.defineProperty";
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break;
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case "Object.defineProperty(this)":
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runtimeRequirements.add(RuntimeGlobals.thisAsExports);
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base = "this";
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type = "Object.defineProperty";
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break;
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default:
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throw new Error(`Unsupported base ${dep.base}`);
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}
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switch (type) {
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case "expression":
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if (!used) {
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initFragments.push(
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new InitFragment(
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"var __webpack_unused_export__;\n",
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InitFragment.STAGE_CONSTANTS,
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0,
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"__webpack_unused_export__"
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)
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);
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source.replace(
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dep.range[0],
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dep.range[1] - 1,
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"__webpack_unused_export__"
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);
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return;
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}
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source.replace(
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dep.range[0],
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dep.range[1] - 1,
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`${base}${propertyAccess(used)}`
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);
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return;
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case "Object.defineProperty":
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if (!used) {
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initFragments.push(
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new InitFragment(
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"var __webpack_unused_export__;\n",
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InitFragment.STAGE_CONSTANTS,
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0,
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"__webpack_unused_export__"
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)
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);
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source.replace(
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dep.range[0],
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dep.range[1] - 1,
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"__webpack_unused_export__ = ("
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);
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return;
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}
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source.replace(
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dep.range[0],
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dep.range[1] - 1,
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`Object.defineProperty(${base}${propertyAccess(
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used.slice(0, -1)
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)}, ${JSON.stringify(used[used.length - 1])}, `
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);
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return;
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}
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}
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};
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module.exports = CommonJsExportsDependency;
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