mirror of https://github.com/webpack/webpack.git
106 lines
2.9 KiB
JavaScript
106 lines
2.9 KiB
JavaScript
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/*
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MIT License http://www.opensource.org/licenses/mit-license.php
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Author Ivan Kopeykin @vankop
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*/
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"use strict";
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const InitFragment = require("../InitFragment");
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const makeSerializable = require("../util/makeSerializable");
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const CachedConstDependency = require("./CachedConstDependency");
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/** @typedef {import("webpack-sources").ReplaceSource} ReplaceSource */
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/** @typedef {import("../Dependency")} Dependency */
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/** @typedef {import("../DependencyTemplate").DependencyTemplateContext} DependencyTemplateContext */
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/** @typedef {import("../javascript/JavascriptModulesPlugin").ChunkRenderContext} ChunkRenderContext */
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class ExternalModuleDependency extends CachedConstDependency {
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constructor(module, imports, expression, range, identifier) {
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super(expression, range, identifier);
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if (imports.length === 0) throw new Error("Imports should be provided");
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this.importedModule = module;
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this.imports = imports;
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}
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/**
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* Update the hash
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* @param {Hash} hash hash to be updated
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* @param {UpdateHashContext} context context
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* @returns {void}
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*/
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updateHash(hash, context) {
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if (!this._hashUpdate)
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this._hashUpdate = `${this.importedModule}${JSON.stringify(
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this.imports
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)}${this.identifier}${this.range}${this.expression}`;
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hash.update(this._hashUpdate);
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}
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serialize(context) {
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super.serialize(context);
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const { write } = context;
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write(this.importedModule);
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write(this.imports);
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}
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deserialize(context) {
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super.deserialize(context);
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const { read } = context;
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this.importedModule = read();
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this.imports = read();
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}
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}
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makeSerializable(
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ExternalModuleDependency,
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"webpack/lib/dependencies/ExternalModuleDependency"
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);
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ExternalModuleDependency.Template = class ExternalModuleDependencyTemplate extends (
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CachedConstDependency.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(dependency, source, templateContext) {
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super.apply(dependency, source, templateContext);
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const dep = /** @type {ExternalModuleDependency} */ (dependency);
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const { chunkInitFragments } = templateContext;
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let importsString;
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const namedImports = [];
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for (const { name, value } of dep.imports) {
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if (name === "default") {
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importsString = value || dep.importedModule;
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} else {
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namedImports.push(value !== name ? `${name} as ${value}` : name);
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}
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}
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if (namedImports.length > 0) {
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const named = `{${namedImports.join(",")}}`;
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importsString = importsString ? `${importsString}, ${named}` : named;
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}
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importsString = `import ${importsString} from ${JSON.stringify(
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dep.importedModule
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)};`;
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chunkInitFragments.push(
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new InitFragment(
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importsString,
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InitFragment.STAGE_CONSTANTS,
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0,
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importsString
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)
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);
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}
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};
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module.exports = ExternalModuleDependency;
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