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node_modules/webpack/lib/dependencies/HarmonyAcceptDependency.js

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+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+
+"use strict";
+
+const Template = require("../Template");
+const AwaitDependenciesInitFragment = require("../async-modules/AwaitDependenciesInitFragment");
+const makeSerializable = require("../util/makeSerializable");
+const HarmonyImportDependency = require("./HarmonyImportDependency");
+const { ImportPhaseUtils } = require("./ImportPhase");
+const NullDependency = require("./NullDependency");
+
+/** @typedef {import("webpack-sources").ReplaceSource} ReplaceSource */
+/** @typedef {import("../Dependency")} Dependency */
+/** @typedef {import("../DependencyTemplate").DependencyTemplateContext} DependencyTemplateContext */
+/** @typedef {import("../javascript/JavascriptParser").Range} Range */
+/** @typedef {import("../serialization/ObjectMiddleware").ObjectDeserializerContext} ObjectDeserializerContext */
+/** @typedef {import("../serialization/ObjectMiddleware").ObjectSerializerContext} ObjectSerializerContext */
+/** @typedef {import("./HarmonyAcceptImportDependency")} HarmonyAcceptImportDependency */
+/** @typedef {import("../Module")} Module */
+/** @typedef {import("../Module").ModuleId} ModuleId */
+
+class HarmonyAcceptDependency extends NullDependency {
+	/**
+	 * @param {Range} range expression range
+	 * @param {HarmonyAcceptImportDependency[]} dependencies import dependencies
+	 * @param {boolean} hasCallback true, if the range wraps an existing callback
+	 */
+	constructor(range, dependencies, hasCallback) {
+		super();
+		this.range = range;
+		this.dependencies = dependencies;
+		this.hasCallback = hasCallback;
+	}
+
+	get type() {
+		return "accepted harmony modules";
+	}
+
+	/**
+	 * @param {ObjectSerializerContext} context context
+	 */
+	serialize(context) {
+		const { write } = context;
+		write(this.range);
+		write(this.dependencies);
+		write(this.hasCallback);
+		super.serialize(context);
+	}
+
+	/**
+	 * @param {ObjectDeserializerContext} context context
+	 */
+	deserialize(context) {
+		const { read } = context;
+		this.range = read();
+		this.dependencies = read();
+		this.hasCallback = read();
+		super.deserialize(context);
+	}
+}
+
+makeSerializable(
+	HarmonyAcceptDependency,
+	"webpack/lib/dependencies/HarmonyAcceptDependency"
+);
+
+HarmonyAcceptDependency.Template = class HarmonyAcceptDependencyTemplate extends (
+	NullDependency.Template
+) {
+	/**
+	 * @param {Dependency} dependency the dependency for which the template should be applied
+	 * @param {ReplaceSource} source the current replace source which can be modified
+	 * @param {DependencyTemplateContext} templateContext the context object
+	 * @returns {void}
+	 */
+	apply(dependency, source, templateContext) {
+		const dep = /** @type {HarmonyAcceptDependency} */ (dependency);
+		const {
+			module,
+			runtime,
+			runtimeRequirements,
+			runtimeTemplate,
+			moduleGraph,
+			chunkGraph
+		} = templateContext;
+
+		/**
+		 * @param {Dependency} dependency the dependency to get module id for
+		 * @returns {ModuleId | null} the module id or null if not found
+		 */
+		const getDependencyModuleId = (dependency) =>
+			chunkGraph.getModuleId(
+				/** @type {Module} */ (moduleGraph.getModule(dependency))
+			);
+
+		/**
+		 * @param {Dependency} a the first dependency
+		 * @param {Dependency} b the second dependency
+		 * @returns {boolean} true if the dependencies are related
+		 */
+		const isRelatedHarmonyImportDependency = (a, b) =>
+			a !== b &&
+			b instanceof HarmonyImportDependency &&
+			getDependencyModuleId(a) === getDependencyModuleId(b);
+
+		/**
+		 * HarmonyAcceptImportDependency lacks a lot of information, such as the defer property.
+		 * One HarmonyAcceptImportDependency may need to generate multiple ImportStatements.
+		 * Therefore, we find its original HarmonyImportDependency for code generation.
+		 * @param {HarmonyAcceptImportDependency} dependency the dependency to get harmony import dependencies for
+		 * @returns {HarmonyImportDependency[]} array of related harmony import dependencies
+		 */
+		const getHarmonyImportDependencies = (dependency) => {
+			/** @type {HarmonyImportDependency[]} */
+			const result = [];
+			/** @type {HarmonyImportDependency | null} */
+			let deferDependency = null;
+			/** @type {HarmonyImportDependency | null} */
+			let noDeferredDependency = null;
+
+			for (const d of module.dependencies) {
+				if (deferDependency && noDeferredDependency) break;
+				if (isRelatedHarmonyImportDependency(dependency, d)) {
+					if (
+						ImportPhaseUtils.isDefer(
+							/** @type {HarmonyImportDependency} */ (d).phase
+						)
+					) {
+						deferDependency = /** @type {HarmonyImportDependency} */ (d);
+					} else {
+						noDeferredDependency = /** @type {HarmonyImportDependency} */ (d);
+					}
+				}
+			}
+			if (deferDependency) result.push(deferDependency);
+			if (noDeferredDependency) result.push(noDeferredDependency);
+			if (result.length === 0) {
+				// fallback to the original dependency
+				result.push(dependency);
+			}
+			return result;
+		};
+
+		/** @type {HarmonyImportDependency[]} */
+		const syncDeps = [];
+
+		/** @type {HarmonyAcceptImportDependency[]} */
+		const asyncDeps = [];
+
+		for (const dependency of dep.dependencies) {
+			const connection = moduleGraph.getConnection(dependency);
+
+			if (connection && moduleGraph.isAsync(connection.module)) {
+				asyncDeps.push(dependency);
+			} else {
+				syncDeps.push(...getHarmonyImportDependencies(dependency));
+			}
+		}
+
+		let content = syncDeps
+			.map((dependency) => {
+				const referencedModule = moduleGraph.getModule(dependency);
+				return {
+					dependency,
+					runtimeCondition: referencedModule
+						? HarmonyImportDependency.Template.getImportEmittedRuntime(
+								module,
+								referencedModule
+							)
+						: false
+				};
+			})
+			.filter(({ runtimeCondition }) => runtimeCondition !== false)
+			.map(({ dependency, runtimeCondition }) => {
+				const condition = runtimeTemplate.runtimeConditionExpression({
+					chunkGraph,
+					runtime,
+					runtimeCondition,
+					runtimeRequirements
+				});
+				const s = dependency.getImportStatement(true, templateContext);
+				const code = s[0] + s[1];
+				if (condition !== "true") {
+					return `if (${condition}) {\n${Template.indent(code)}\n}\n`;
+				}
+				return code;
+			})
+			.join("");
+
+		const promises = new Map(
+			asyncDeps.map((dependency) => [
+				dependency.getImportVar(moduleGraph),
+				dependency.getModuleExports(templateContext)
+			])
+		);
+
+		let optAsync = "";
+		if (promises.size !== 0) {
+			optAsync = "async ";
+			content += new AwaitDependenciesInitFragment(promises).getContent({
+				...templateContext,
+				type: "javascript"
+			});
+		}
+
+		if (dep.hasCallback) {
+			if (runtimeTemplate.supportsArrowFunction()) {
+				source.insert(
+					dep.range[0],
+					`${optAsync}__WEBPACK_OUTDATED_DEPENDENCIES__ => { ${content} return (`
+				);
+				source.insert(dep.range[1], ")(__WEBPACK_OUTDATED_DEPENDENCIES__); }");
+			} else {
+				source.insert(
+					dep.range[0],
+					`${optAsync}function(__WEBPACK_OUTDATED_DEPENDENCIES__) { ${content} return (`
+				);
+				source.insert(
+					dep.range[1],
+					")(__WEBPACK_OUTDATED_DEPENDENCIES__); }.bind(this)"
+				);
+			}
+			return;
+		}
+
+		const arrow = runtimeTemplate.supportsArrowFunction();
+		source.insert(
+			dep.range[1] - 0.5,
+			`, ${arrow ? `${optAsync}() =>` : `${optAsync}function()`} { ${content} }`
+		);
+	}
+};
+
+module.exports = HarmonyAcceptDependency;