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app_vue/node_modules/webpack/lib/dependencies/HarmonyImportDependency.js

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+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+
+"use strict";
+
+const ConditionalInitFragment = require("../ConditionalInitFragment");
+const Dependency = require("../Dependency");
+const HarmonyLinkingError = require("../HarmonyLinkingError");
+const InitFragment = require("../InitFragment");
+const Template = require("../Template");
+const AwaitDependenciesInitFragment = require("../async-modules/AwaitDependenciesInitFragment");
+const { filterRuntime, mergeRuntime } = require("../util/runtime");
+const ModuleDependency = require("./ModuleDependency");
+
+/** @typedef {import("webpack-sources").ReplaceSource} ReplaceSource */
+/** @typedef {import("webpack-sources").Source} Source */
+/** @typedef {import("../ChunkGraph")} ChunkGraph */
+/** @typedef {import("../Dependency").ReferencedExport} ReferencedExport */
+/** @typedef {import("../Dependency").UpdateHashContext} UpdateHashContext */
+/** @typedef {import("../DependencyTemplate").DependencyTemplateContext} DependencyTemplateContext */
+/** @typedef {import("../ExportsInfo")} ExportsInfo */
+/** @typedef {import("../Module")} Module */
+/** @typedef {import("../Module").BuildMeta} BuildMeta */
+/** @typedef {import("../ModuleGraph")} ModuleGraph */
+/** @typedef {import("../RuntimeTemplate")} RuntimeTemplate */
+/** @typedef {import("../WebpackError")} WebpackError */
+/** @typedef {import("../javascript/JavascriptParser").ImportAttributes} ImportAttributes */
+/** @typedef {import("../serialization/ObjectMiddleware").ObjectDeserializerContext} ObjectDeserializerContext */
+/** @typedef {import("../serialization/ObjectMiddleware").ObjectSerializerContext} ObjectSerializerContext */
+/** @typedef {import("../util/Hash")} Hash */
+/** @typedef {import("../util/runtime").RuntimeSpec} RuntimeSpec */
+
+/** @typedef {0 | 1 | 2 | 3 | false} ExportPresenceMode */
+
+const ExportPresenceModes = {
+	NONE: /** @type {ExportPresenceMode} */ (0),
+	WARN: /** @type {ExportPresenceMode} */ (1),
+	AUTO: /** @type {ExportPresenceMode} */ (2),
+	ERROR: /** @type {ExportPresenceMode} */ (3),
+	/**
+	 * @param {string | false} str param
+	 * @returns {ExportPresenceMode} result
+	 */
+	fromUserOption(str) {
+		switch (str) {
+			case "error":
+				return ExportPresenceModes.ERROR;
+			case "warn":
+				return ExportPresenceModes.WARN;
+			case "auto":
+				return ExportPresenceModes.AUTO;
+			case false:
+				return ExportPresenceModes.NONE;
+			default:
+				throw new Error(`Invalid export presence value ${str}`);
+		}
+	}
+};
+
+class HarmonyImportDependency extends ModuleDependency {
+	/**
+	 * @param {string} request request string
+	 * @param {number} sourceOrder source order
+	 * @param {ImportAttributes=} attributes import attributes
+	 */
+	constructor(request, sourceOrder, attributes) {
+		super(request);
+		this.sourceOrder = sourceOrder;
+		this.assertions = attributes;
+	}
+
+	get category() {
+		return "esm";
+	}
+
+	/**
+	 * Returns list of exports referenced by this dependency
+	 * @param {ModuleGraph} moduleGraph module graph
+	 * @param {RuntimeSpec} runtime the runtime for which the module is analysed
+	 * @returns {(string[] | ReferencedExport)[]} referenced exports
+	 */
+	getReferencedExports(moduleGraph, runtime) {
+		return Dependency.NO_EXPORTS_REFERENCED;
+	}
+
+	/**
+	 * @param {ModuleGraph} moduleGraph the module graph
+	 * @returns {string} name of the variable for the import
+	 */
+	getImportVar(moduleGraph) {
+		const module = /** @type {Module} */ (moduleGraph.getParentModule(this));
+		const meta = moduleGraph.getMeta(module);
+		let importVarMap = meta.importVarMap;
+		if (!importVarMap) meta.importVarMap = importVarMap = new Map();
+		let importVar = importVarMap.get(
+			/** @type {Module} */ (moduleGraph.getModule(this))
+		);
+		if (importVar) return importVar;
+		importVar = `${Template.toIdentifier(
+			`${this.userRequest}`
+		)}__WEBPACK_IMPORTED_MODULE_${importVarMap.size}__`;
+		importVarMap.set(
+			/** @type {Module} */ (moduleGraph.getModule(this)),
+			importVar
+		);
+		return importVar;
+	}
+
+	/**
+	 * @param {boolean} update create new variables or update existing one
+	 * @param {DependencyTemplateContext} templateContext the template context
+	 * @returns {[string, string]} the import statement and the compat statement
+	 */
+	getImportStatement(
+		update,
+		{ runtimeTemplate, module, moduleGraph, chunkGraph, runtimeRequirements }
+	) {
+		return runtimeTemplate.importStatement({
+			update,
+			module: /** @type {Module} */ (moduleGraph.getModule(this)),
+			chunkGraph,
+			importVar: this.getImportVar(moduleGraph),
+			request: this.request,
+			originModule: module,
+			runtimeRequirements
+		});
+	}
+
+	/**
+	 * @param {ModuleGraph} moduleGraph module graph
+	 * @param {string[]} ids imported ids
+	 * @param {string} additionalMessage extra info included in the error message
+	 * @returns {WebpackError[] | undefined} errors
+	 */
+	getLinkingErrors(moduleGraph, ids, additionalMessage) {
+		const importedModule = moduleGraph.getModule(this);
+		// ignore errors for missing or failed modules
+		if (!importedModule || importedModule.getNumberOfErrors() > 0) {
+			return;
+		}
+
+		const parentModule =
+			/** @type {Module} */
+			(moduleGraph.getParentModule(this));
+		const exportsType = importedModule.getExportsType(
+			moduleGraph,
+			/** @type {BuildMeta} */ (parentModule.buildMeta).strictHarmonyModule
+		);
+		if (exportsType === "namespace" || exportsType === "default-with-named") {
+			if (ids.length === 0) {
+				return;
+			}
+
+			if (
+				(exportsType !== "default-with-named" || ids[0] !== "default") &&
+				moduleGraph.isExportProvided(importedModule, ids) === false
+			) {
+				// We are sure that it's not provided
+
+				// Try to provide detailed info in the error message
+				let pos = 0;
+				let exportsInfo = moduleGraph.getExportsInfo(importedModule);
+				while (pos < ids.length && exportsInfo) {
+					const id = ids[pos++];
+					const exportInfo = exportsInfo.getReadOnlyExportInfo(id);
+					if (exportInfo.provided === false) {
+						// We are sure that it's not provided
+						const providedExports = exportsInfo.getProvidedExports();
+						const moreInfo = !Array.isArray(providedExports)
+							? " (possible exports unknown)"
+							: providedExports.length === 0
+								? " (module has no exports)"
+								: ` (possible exports: ${providedExports.join(", ")})`;
+						return [
+							new HarmonyLinkingError(
+								`export ${ids
+									.slice(0, pos)
+									.map(id => `'${id}'`)
+									.join(".")} ${additionalMessage} was not found in '${
+									this.userRequest
+								}'${moreInfo}`
+							)
+						];
+					}
+					exportsInfo =
+						/** @type {ExportsInfo} */
+						(exportInfo.getNestedExportsInfo());
+				}
+
+				// General error message
+				return [
+					new HarmonyLinkingError(
+						`export ${ids
+							.map(id => `'${id}'`)
+							.join(".")} ${additionalMessage} was not found in '${
+							this.userRequest
+						}'`
+					)
+				];
+			}
+		}
+		switch (exportsType) {
+			case "default-only":
+				// It's has only a default export
+				if (ids.length > 0 && ids[0] !== "default") {
+					// In strict harmony modules we only support the default export
+					return [
+						new HarmonyLinkingError(
+							`Can't import the named export ${ids
+								.map(id => `'${id}'`)
+								.join(
+									"."
+								)} ${additionalMessage} from default-exporting module (only default export is available)`
+						)
+					];
+				}
+				break;
+			case "default-with-named":
+				// It has a default export and named properties redirect
+				// In some cases we still want to warn here
+				if (
+					ids.length > 0 &&
+					ids[0] !== "default" &&
+					/** @type {BuildMeta} */
+					(importedModule.buildMeta).defaultObject === "redirect-warn"
+				) {
+					// For these modules only the default export is supported
+					return [
+						new HarmonyLinkingError(
+							`Should not import the named export ${ids
+								.map(id => `'${id}'`)
+								.join(
+									"."
+								)} ${additionalMessage} from default-exporting module (only default export is available soon)`
+						)
+					];
+				}
+				break;
+		}
+	}
+
+	/**
+	 * @param {ObjectSerializerContext} context context
+	 */
+	serialize(context) {
+		const { write } = context;
+		write(this.sourceOrder);
+		write(this.assertions);
+		super.serialize(context);
+	}
+
+	/**
+	 * @param {ObjectDeserializerContext} context context
+	 */
+	deserialize(context) {
+		const { read } = context;
+		this.sourceOrder = read();
+		this.assertions = read();
+		super.deserialize(context);
+	}
+}
+
+module.exports = HarmonyImportDependency;
+
+/** @type {WeakMap<Module, WeakMap<Module, RuntimeSpec | boolean>>} */
+const importEmittedMap = new WeakMap();
+
+HarmonyImportDependency.Template = class HarmonyImportDependencyTemplate extends (
+	ModuleDependency.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 {HarmonyImportDependency} */ (dependency);
+		const { module, chunkGraph, moduleGraph, runtime } = templateContext;
+
+		const connection = moduleGraph.getConnection(dep);
+		if (connection && !connection.isTargetActive(runtime)) return;
+
+		const referencedModule = connection && connection.module;
+
+		if (
+			connection &&
+			connection.weak &&
+			referencedModule &&
+			chunkGraph.getModuleId(referencedModule) === null
+		) {
+			// in weak references, module might not be in any chunk
+			// but that's ok, we don't need that logic in this case
+			return;
+		}
+
+		const moduleKey = referencedModule
+			? referencedModule.identifier()
+			: dep.request;
+		const key = `harmony import ${moduleKey}`;
+
+		const runtimeCondition = dep.weak
+			? false
+			: connection
+				? filterRuntime(runtime, r => connection.isTargetActive(r))
+				: true;
+
+		if (module && referencedModule) {
+			let emittedModules = importEmittedMap.get(module);
+			if (emittedModules === undefined) {
+				emittedModules = new WeakMap();
+				importEmittedMap.set(module, emittedModules);
+			}
+			let mergedRuntimeCondition = runtimeCondition;
+			const oldRuntimeCondition = emittedModules.get(referencedModule) || false;
+			if (oldRuntimeCondition !== false && mergedRuntimeCondition !== true) {
+				if (mergedRuntimeCondition === false || oldRuntimeCondition === true) {
+					mergedRuntimeCondition = oldRuntimeCondition;
+				} else {
+					mergedRuntimeCondition = mergeRuntime(
+						oldRuntimeCondition,
+						mergedRuntimeCondition
+					);
+				}
+			}
+			emittedModules.set(referencedModule, mergedRuntimeCondition);
+		}
+
+		const importStatement = dep.getImportStatement(false, templateContext);
+		if (
+			referencedModule &&
+			templateContext.moduleGraph.isAsync(referencedModule)
+		) {
+			templateContext.initFragments.push(
+				new ConditionalInitFragment(
+					importStatement[0],
+					InitFragment.STAGE_HARMONY_IMPORTS,
+					dep.sourceOrder,
+					key,
+					runtimeCondition
+				)
+			);
+			templateContext.initFragments.push(
+				new AwaitDependenciesInitFragment(
+					new Set([dep.getImportVar(templateContext.moduleGraph)])
+				)
+			);
+			templateContext.initFragments.push(
+				new ConditionalInitFragment(
+					importStatement[1],
+					InitFragment.STAGE_ASYNC_HARMONY_IMPORTS,
+					dep.sourceOrder,
+					`${key} compat`,
+					runtimeCondition
+				)
+			);
+		} else {
+			templateContext.initFragments.push(
+				new ConditionalInitFragment(
+					importStatement[0] + importStatement[1],
+					InitFragment.STAGE_HARMONY_IMPORTS,
+					dep.sourceOrder,
+					key,
+					runtimeCondition
+				)
+			);
+		}
+	}
+
+	/**
+	 * @param {Module} module the module
+	 * @param {Module} referencedModule the referenced module
+	 * @returns {RuntimeSpec | boolean} runtimeCondition in which this import has been emitted
+	 */
+	static getImportEmittedRuntime(module, referencedModule) {
+		const emittedModules = importEmittedMap.get(module);
+		if (emittedModules === undefined) return false;
+		return emittedModules.get(referencedModule) || false;
+	}
+};
+
+module.exports.ExportPresenceModes = ExportPresenceModes;