/*
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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 makeSerializable = require("../util/makeSerializable");
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const { ImportPhaseUtils } = require("./ImportPhase");
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const ModuleDependency = require("./ModuleDependency");
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/** @typedef {import("webpack-sources").ReplaceSource} ReplaceSource */
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/** @typedef {import("../AsyncDependenciesBlock")} AsyncDependenciesBlock */
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/** @typedef {import("../Dependency").RawReferencedExports} RawReferencedExports */
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/** @typedef {import("../Dependency").ReferencedExports} ReferencedExports */
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/** @typedef {import("../DependencyTemplate").DependencyTemplateContext} DependencyTemplateContext */
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/** @typedef {import("../Module")} Module */
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/** @typedef {import("../Module").BuildMeta} BuildMeta */
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/** @typedef {import("../ModuleGraph")} ModuleGraph */
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/** @typedef {import("../javascript/JavascriptParser").ImportAttributes} ImportAttributes */
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/** @typedef {import("../javascript/JavascriptParser").Range} Range */
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/** @typedef {import("../serialization/ObjectMiddleware").ObjectDeserializerContext} ObjectDeserializerContext */
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/** @typedef {import("../serialization/ObjectMiddleware").ObjectSerializerContext} ObjectSerializerContext */
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/** @typedef {import("../util/runtime").RuntimeSpec} RuntimeSpec */
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/** @typedef {import("./ImportPhase").ImportPhaseType} ImportPhaseType */
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class ImportDependency extends ModuleDependency {
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/**
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* Creates an instance of ImportDependency.
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* @param {string} request the request
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* @param {Range} range expression range
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* @param {RawReferencedExports | null} referencedExports list of referenced exports
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* @param {ImportPhaseType} phase import phase
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* @param {ImportAttributes=} attributes import attributes
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*/
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constructor(request, range, referencedExports, phase, attributes) {
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super(request);
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this.range = range;
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this.referencedExports = referencedExports;
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this.phase = phase;
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this.attributes = attributes;
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}
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get type() {
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return "import()";
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}
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get category() {
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return "esm";
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}
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/**
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* Returns an identifier to merge equal requests.
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* @returns {string | null} an identifier to merge equal requests
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*/
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getResourceIdentifier() {
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let str = super.getResourceIdentifier();
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// We specifically use this check to avoid writing the default (`evaluation` or `0`) value and save memory
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if (this.phase) {
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str += `|phase${ImportPhaseUtils.stringify(this.phase)}`;
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}
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if (this.attributes) {
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str += `|attributes${JSON.stringify(this.attributes)}`;
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}
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return str;
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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 {ReferencedExports} referenced exports
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*/
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getReferencedExports(moduleGraph, runtime) {
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if (!this.referencedExports) return Dependency.EXPORTS_OBJECT_REFERENCED;
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/** @type {ReferencedExports} */
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const refs = [];
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for (const referencedExport of this.referencedExports) {
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if (referencedExport[0] === "default") {
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const selfModule =
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/** @type {Module} */
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(moduleGraph.getParentModule(this));
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const importedModule =
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/** @type {Module} */
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(moduleGraph.getModule(this));
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const exportsType = importedModule.getExportsType(
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moduleGraph,
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/** @type {BuildMeta} */
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(selfModule.buildMeta).strictHarmonyModule
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);
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if (
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exportsType === "default-only" ||
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exportsType === "default-with-named"
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) {
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return Dependency.EXPORTS_OBJECT_REFERENCED;
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}
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}
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refs.push({
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name: referencedExport,
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canMangle: false
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});
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}
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return refs;
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}
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/**
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* Serializes this instance into the provided serializer context.
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* @param {ObjectSerializerContext} context context
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*/
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serialize(context) {
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context.write(this.range);
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context.write(this.referencedExports);
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context.write(this.phase);
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context.write(this.attributes);
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super.serialize(context);
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}
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/**
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* Restores this instance from the provided deserializer context.
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* @param {ObjectDeserializerContext} context context
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*/
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deserialize(context) {
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this.range = context.read();
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this.referencedExports = context.read();
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this.phase = context.read();
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this.attributes = context.read();
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super.deserialize(context);
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}
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}
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makeSerializable(ImportDependency, "webpack/lib/dependencies/ImportDependency");
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ImportDependency.Template = class ImportDependencyTemplate extends (
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ModuleDependency.Template
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) {
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/**
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* Applies the plugin by registering its hooks on the compiler.
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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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{ runtimeTemplate, module, moduleGraph, chunkGraph, runtimeRequirements }
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) {
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const dep = /** @type {ImportDependency} */ (dependency);
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const block = /** @type {AsyncDependenciesBlock} */ (
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moduleGraph.getParentBlock(dep)
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);
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let content = runtimeTemplate.moduleNamespacePromise({
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chunkGraph,
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block,
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module: /** @type {Module} */ (moduleGraph.getModule(dep)),
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request: dep.request,
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strict: /** @type {BuildMeta} */ (module.buildMeta).strictHarmonyModule,
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dependency: dep,
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message: "import()",
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runtimeRequirements
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});
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// For source phase imports, unwrap the default export
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// import.source() should return the source directly, not a namespace
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if (ImportPhaseUtils.isSource(dep.phase)) {
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content = `${content}.then(${runtimeTemplate.returningFunction(
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'm["default"]',
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"m"
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)})`;
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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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module.exports = ImportDependency;
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