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app_vue/node_modules/webpack/lib/container/FallbackModule.js

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+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra and Zackary Jackson @ScriptedAlchemy
+*/
+
+"use strict";
+
+const { RawSource } = require("webpack-sources");
+const Module = require("../Module");
+const { JS_TYPES } = require("../ModuleSourceTypesConstants");
+const { WEBPACK_MODULE_TYPE_FALLBACK } = require("../ModuleTypeConstants");
+const RuntimeGlobals = require("../RuntimeGlobals");
+const Template = require("../Template");
+const makeSerializable = require("../util/makeSerializable");
+const FallbackItemDependency = require("./FallbackItemDependency");
+
+/** @typedef {import("../../declarations/WebpackOptions").WebpackOptionsNormalized} WebpackOptions */
+/** @typedef {import("../Chunk")} Chunk */
+/** @typedef {import("../ChunkGraph")} ChunkGraph */
+/** @typedef {import("../ChunkGroup")} ChunkGroup */
+/** @typedef {import("../Compilation")} Compilation */
+/** @typedef {import("../Module").BuildCallback} BuildCallback */
+/** @typedef {import("../Module").CodeGenerationContext} CodeGenerationContext */
+/** @typedef {import("../Module").CodeGenerationResult} CodeGenerationResult */
+/** @typedef {import("../Module").LibIdentOptions} LibIdentOptions */
+/** @typedef {import("../Module").NeedBuildCallback} NeedBuildCallback */
+/** @typedef {import("../Module").NeedBuildContext} NeedBuildContext */
+/** @typedef {import("../Module").SourceTypes} SourceTypes */
+/** @typedef {import("../RequestShortener")} RequestShortener */
+/** @typedef {import("../ResolverFactory").ResolverWithOptions} ResolverWithOptions */
+/** @typedef {import("../WebpackError")} WebpackError */
+/** @typedef {import("../serialization/ObjectMiddleware").ObjectDeserializerContext} ObjectDeserializerContext */
+/** @typedef {import("../serialization/ObjectMiddleware").ObjectSerializerContext} ObjectSerializerContext */
+/** @typedef {import("../util/Hash")} Hash */
+/** @typedef {import("../util/fs").InputFileSystem} InputFileSystem */
+
+const RUNTIME_REQUIREMENTS = new Set([RuntimeGlobals.module]);
+
+class FallbackModule extends Module {
+	/**
+	 * @param {string[]} requests list of requests to choose one
+	 */
+	constructor(requests) {
+		super(WEBPACK_MODULE_TYPE_FALLBACK);
+		this.requests = requests;
+		this._identifier = `fallback ${this.requests.join(" ")}`;
+	}
+
+	/**
+	 * @returns {string} a unique identifier of the module
+	 */
+	identifier() {
+		return this._identifier;
+	}
+
+	/**
+	 * @param {RequestShortener} requestShortener the request shortener
+	 * @returns {string} a user readable identifier of the module
+	 */
+	readableIdentifier(requestShortener) {
+		return this._identifier;
+	}
+
+	/**
+	 * @param {LibIdentOptions} options options
+	 * @returns {string | null} an identifier for library inclusion
+	 */
+	libIdent(options) {
+		return `${this.layer ? `(${this.layer})/` : ""}webpack/container/fallback/${
+			this.requests[0]
+		}/and ${this.requests.length - 1} more`;
+	}
+
+	/**
+	 * @param {Chunk} chunk the chunk which condition should be checked
+	 * @param {Compilation} compilation the compilation
+	 * @returns {boolean} true, if the chunk is ok for the module
+	 */
+	chunkCondition(chunk, { chunkGraph }) {
+		return chunkGraph.getNumberOfEntryModules(chunk) > 0;
+	}
+
+	/**
+	 * @param {NeedBuildContext} context context info
+	 * @param {NeedBuildCallback} callback callback function, returns true, if the module needs a rebuild
+	 * @returns {void}
+	 */
+	needBuild(context, callback) {
+		callback(null, !this.buildInfo);
+	}
+
+	/**
+	 * @param {WebpackOptions} options webpack options
+	 * @param {Compilation} compilation the compilation
+	 * @param {ResolverWithOptions} resolver the resolver
+	 * @param {InputFileSystem} fs the file system
+	 * @param {BuildCallback} callback callback function
+	 * @returns {void}
+	 */
+	build(options, compilation, resolver, fs, callback) {
+		this.buildMeta = {};
+		this.buildInfo = {
+			strict: true
+		};
+
+		this.clearDependenciesAndBlocks();
+		for (const request of this.requests)
+			this.addDependency(new FallbackItemDependency(request));
+
+		callback();
+	}
+
+	/**
+	 * @param {string=} type the source type for which the size should be estimated
+	 * @returns {number} the estimated size of the module (must be non-zero)
+	 */
+	size(type) {
+		return this.requests.length * 5 + 42;
+	}
+
+	/**
+	 * @returns {SourceTypes} types available (do not mutate)
+	 */
+	getSourceTypes() {
+		return JS_TYPES;
+	}
+
+	/**
+	 * @param {CodeGenerationContext} context context for code generation
+	 * @returns {CodeGenerationResult} result
+	 */
+	codeGeneration({ runtimeTemplate, moduleGraph, chunkGraph }) {
+		const ids = this.dependencies.map(dep =>
+			chunkGraph.getModuleId(/** @type {Module} */ (moduleGraph.getModule(dep)))
+		);
+		const code = Template.asString([
+			`var ids = ${JSON.stringify(ids)};`,
+			"var error, result, i = 0;",
+			`var loop = ${runtimeTemplate.basicFunction("next", [
+				"while(i < ids.length) {",
+				Template.indent([
+					`try { next = ${RuntimeGlobals.require}(ids[i++]); } catch(e) { return handleError(e); }`,
+					"if(next) return next.then ? next.then(handleResult, handleError) : handleResult(next);"
+				]),
+				"}",
+				"if(error) throw error;"
+			])}`,
+			`var handleResult = ${runtimeTemplate.basicFunction("result", [
+				"if(result) return result;",
+				"return loop();"
+			])};`,
+			`var handleError = ${runtimeTemplate.basicFunction("e", [
+				"error = e;",
+				"return loop();"
+			])};`,
+			"module.exports = loop();"
+		]);
+		const sources = new Map();
+		sources.set("javascript", new RawSource(code));
+		return { sources, runtimeRequirements: RUNTIME_REQUIREMENTS };
+	}
+
+	/**
+	 * @param {ObjectSerializerContext} context context
+	 */
+	serialize(context) {
+		const { write } = context;
+		write(this.requests);
+		super.serialize(context);
+	}
+
+	/**
+	 * @param {ObjectDeserializerContext} context context
+	 * @returns {FallbackModule} deserialized fallback module
+	 */
+	static deserialize(context) {
+		const { read } = context;
+		const obj = new FallbackModule(read());
+		obj.deserialize(context);
+		return obj;
+	}
+}
+
+makeSerializable(FallbackModule, "webpack/lib/container/FallbackModule");
+
+module.exports = FallbackModule;