366 lines
9.8 KiB
JavaScript
366 lines
9.8 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 Dependency = require("../Dependency");
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const { UsageState } = require("../ExportsInfo");
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const Template = require("../Template");
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const { equals } = require("../util/ArrayHelpers");
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const makeSerializable = require("../util/makeSerializable");
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const propertyAccess = require("../util/propertyAccess");
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const { handleDependencyBase } = require("./CommonJsDependencyHelpers");
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const ModuleDependency = require("./ModuleDependency");
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const processExportInfo = require("./processExportInfo");
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/** @typedef {import("webpack-sources").ReplaceSource} ReplaceSource */
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/** @typedef {import("../Dependency").ExportsSpec} ExportsSpec */
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/** @typedef {import("../Dependency").ReferencedExport} ReferencedExport */
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/** @typedef {import("../DependencyTemplate").DependencyTemplateContext} DependencyTemplateContext */
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/** @typedef {import("../Module")} Module */
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/** @typedef {import("../ModuleGraph")} ModuleGraph */
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/** @typedef {import("../util/runtime").RuntimeSpec} RuntimeSpec */
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const idsSymbol = Symbol("CommonJsExportRequireDependency.ids");
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const EMPTY_OBJECT = {};
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class CommonJsExportRequireDependency extends ModuleDependency {
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constructor(range, valueRange, base, names, request, ids, resultUsed) {
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super(request);
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this.range = range;
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this.valueRange = valueRange;
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this.base = base;
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this.names = names;
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this.ids = ids;
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this.resultUsed = resultUsed;
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this.asiSafe = undefined;
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}
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get type() {
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return "cjs export require";
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}
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/**
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* @param {ModuleGraph} moduleGraph the module graph
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* @returns {string[]} the imported id
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*/
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getIds(moduleGraph) {
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return moduleGraph.getMeta(this)[idsSymbol] || this.ids;
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}
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/**
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* @param {ModuleGraph} moduleGraph the module graph
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* @param {string[]} ids the imported ids
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* @returns {void}
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*/
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setIds(moduleGraph, ids) {
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moduleGraph.getMeta(this)[idsSymbol] = ids;
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}
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/**
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* Returns list of exports referenced by this dependency
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* @param {ModuleGraph} moduleGraph module graph
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* @param {RuntimeSpec} runtime the runtime for which the module is analysed
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* @returns {(string[] | ReferencedExport)[]} referenced exports
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*/
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getReferencedExports(moduleGraph, runtime) {
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const ids = this.getIds(moduleGraph);
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const getFullResult = () => {
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if (ids.length === 0) {
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return Dependency.EXPORTS_OBJECT_REFERENCED;
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} else {
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return [
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{
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name: ids,
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canMangle: false
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}
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];
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}
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};
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if (this.resultUsed) return getFullResult();
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let exportsInfo = moduleGraph.getExportsInfo(
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moduleGraph.getParentModule(this)
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);
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for (const name of this.names) {
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const exportInfo = exportsInfo.getReadOnlyExportInfo(name);
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const used = exportInfo.getUsed(runtime);
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if (used === UsageState.Unused) return Dependency.NO_EXPORTS_REFERENCED;
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if (used !== UsageState.OnlyPropertiesUsed) return getFullResult();
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exportsInfo = exportInfo.exportsInfo;
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if (!exportsInfo) return getFullResult();
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}
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if (exportsInfo.otherExportsInfo.getUsed(runtime) !== UsageState.Unused) {
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return getFullResult();
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}
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/** @type {string[][]} */
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const referencedExports = [];
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for (const exportInfo of exportsInfo.orderedExports) {
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processExportInfo(
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runtime,
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referencedExports,
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ids.concat(exportInfo.name),
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exportInfo,
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false
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);
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}
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return referencedExports.map(name => ({
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name,
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canMangle: false
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}));
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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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const ids = this.getIds(moduleGraph);
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if (this.names.length === 1) {
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const name = this.names[0];
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const from = moduleGraph.getConnection(this);
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if (!from) return;
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return {
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exports: [
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{
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name,
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from,
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export: ids.length === 0 ? null : ids,
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// we can't mangle names that are in an empty object
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// because one could access the prototype property
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// when export isn't set yet
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canMangle: !(name in EMPTY_OBJECT) && false
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}
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],
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dependencies: [from.module]
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};
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} else if (this.names.length > 0) {
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const name = this.names[0];
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return {
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exports: [
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{
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name,
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// we can't mangle names that are in an empty object
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// because one could access the prototype property
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// when export isn't set yet
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canMangle: !(name in EMPTY_OBJECT) && false
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}
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],
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dependencies: undefined
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};
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} else {
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const from = moduleGraph.getConnection(this);
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if (!from) return;
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const reexportInfo = this.getStarReexports(
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moduleGraph,
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undefined,
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from.module
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);
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if (reexportInfo) {
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return {
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exports: Array.from(reexportInfo.exports, name => {
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return {
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name,
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from,
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export: ids.concat(name),
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canMangle: !(name in EMPTY_OBJECT) && false
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};
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}),
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// TODO handle deep reexports
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dependencies: [from.module]
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};
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} else {
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return {
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exports: true,
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from: ids.length === 0 ? from : undefined,
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canMangle: false,
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dependencies: [from.module]
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};
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}
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}
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}
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/**
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* @param {ModuleGraph} moduleGraph the module graph
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* @param {RuntimeSpec} runtime the runtime
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* @param {Module} importedModule the imported module (optional)
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* @returns {{exports?: Set<string>, checked?: Set<string>}} information
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*/
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getStarReexports(
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moduleGraph,
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runtime,
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importedModule = moduleGraph.getModule(this)
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) {
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let importedExportsInfo = moduleGraph.getExportsInfo(importedModule);
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const ids = this.getIds(moduleGraph);
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if (ids.length > 0)
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importedExportsInfo = importedExportsInfo.getNestedExportsInfo(ids);
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let exportsInfo = moduleGraph.getExportsInfo(
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moduleGraph.getParentModule(this)
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);
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if (this.names.length > 0)
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exportsInfo = exportsInfo.getNestedExportsInfo(this.names);
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const noExtraExports =
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importedExportsInfo &&
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importedExportsInfo.otherExportsInfo.provided === false;
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const noExtraImports =
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exportsInfo &&
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exportsInfo.otherExportsInfo.getUsed(runtime) === UsageState.Unused;
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if (!noExtraExports && !noExtraImports) {
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return;
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}
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const isNamespaceImport =
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importedModule.getExportsType(moduleGraph, false) === "namespace";
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/** @type {Set<string>} */
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const exports = new Set();
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/** @type {Set<string>} */
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const checked = new Set();
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if (noExtraImports) {
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for (const exportInfo of exportsInfo.orderedExports) {
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const name = exportInfo.name;
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if (exportInfo.getUsed(runtime) === UsageState.Unused) continue;
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if (name === "__esModule" && isNamespaceImport) {
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exports.add(name);
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} else if (importedExportsInfo) {
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const importedExportInfo = importedExportsInfo.getReadOnlyExportInfo(
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name
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);
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if (importedExportInfo.provided === false) continue;
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exports.add(name);
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if (importedExportInfo.provided === true) continue;
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checked.add(name);
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} else {
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exports.add(name);
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checked.add(name);
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}
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}
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} else if (noExtraExports) {
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for (const importedExportInfo of importedExportsInfo.orderedExports) {
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const name = importedExportInfo.name;
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if (importedExportInfo.provided === false) continue;
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if (exportsInfo) {
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const exportInfo = exportsInfo.getReadOnlyExportInfo(name);
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if (exportInfo.getUsed(runtime) === UsageState.Unused) continue;
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}
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exports.add(name);
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if (importedExportInfo.provided === true) continue;
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checked.add(name);
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}
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if (isNamespaceImport) {
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exports.add("__esModule");
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checked.delete("__esModule");
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}
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}
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return { exports, checked };
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}
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serialize(context) {
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const { write } = context;
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write(this.asiSafe);
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write(this.range);
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write(this.valueRange);
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write(this.base);
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write(this.names);
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write(this.ids);
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write(this.resultUsed);
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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.asiSafe = read();
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this.range = read();
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this.valueRange = read();
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this.base = read();
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this.names = read();
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this.ids = read();
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this.resultUsed = 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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CommonJsExportRequireDependency,
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"webpack/lib/dependencies/CommonJsExportRequireDependency"
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);
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CommonJsExportRequireDependency.Template = class CommonJsExportRequireDependencyTemplate extends (
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ModuleDependency.Template
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) {
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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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{
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module,
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runtimeTemplate,
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chunkGraph,
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moduleGraph,
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runtimeRequirements,
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runtime
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}
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) {
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const dep = /** @type {CommonJsExportRequireDependency} */ (dependency);
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const used = moduleGraph
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.getExportsInfo(module)
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.getUsedName(dep.names, runtime);
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const [type, base] = handleDependencyBase(
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dep.base,
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module,
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runtimeRequirements
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);
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const importedModule = moduleGraph.getModule(dep);
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let requireExpr = runtimeTemplate.moduleExports({
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module: importedModule,
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chunkGraph,
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request: dep.request,
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weak: dep.weak,
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runtimeRequirements
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});
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const ids = dep.getIds(moduleGraph);
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const usedImported = moduleGraph
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.getExportsInfo(importedModule)
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.getUsedName(ids, runtime);
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if (usedImported) {
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const comment = equals(usedImported, ids)
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? ""
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: Template.toNormalComment(propertyAccess(ids)) + " ";
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requireExpr += `${comment}${propertyAccess(usedImported)}`;
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}
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switch (type) {
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case "expression":
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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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used
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? `${base}${propertyAccess(used)} = ${requireExpr}`
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: `/* unused reexport */ ${requireExpr}`
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);
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return;
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case "Object.defineProperty":
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throw new Error("TODO");
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default:
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throw new Error("Unexpected type");
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}
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}
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};
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module.exports = CommonJsExportRequireDependency;
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