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app_vue/node_modules/webpack/lib/library/AssignLibraryPlugin.js

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+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+
+"use strict";
+
+const { ConcatSource } = require("webpack-sources");
+const { UsageState } = require("../ExportsInfo");
+const RuntimeGlobals = require("../RuntimeGlobals");
+const Template = require("../Template");
+const propertyAccess = require("../util/propertyAccess");
+const { getEntryRuntime } = require("../util/runtime");
+const AbstractLibraryPlugin = require("./AbstractLibraryPlugin");
+
+/** @typedef {import("webpack-sources").Source} Source */
+/** @typedef {import("../../declarations/WebpackOptions").LibraryOptions} LibraryOptions */
+/** @typedef {import("../../declarations/WebpackOptions").LibraryType} LibraryType */
+/** @typedef {import("../Chunk")} Chunk */
+/** @typedef {import("../Compilation")} Compilation */
+/** @typedef {import("../Compilation").ChunkHashContext} ChunkHashContext */
+/** @typedef {import("../Module")} Module */
+/** @typedef {import("../javascript/JavascriptModulesPlugin").RenderContext} RenderContext */
+/** @typedef {import("../javascript/JavascriptModulesPlugin").StartupRenderContext} StartupRenderContext */
+/** @typedef {import("../util/Hash")} Hash */
+/** @template T @typedef {import("./AbstractLibraryPlugin").LibraryContext<T>} LibraryContext<T> */
+
+const KEYWORD_REGEX =
+	/^(await|break|case|catch|class|const|continue|debugger|default|delete|do|else|enum|export|extends|false|finally|for|function|if|implements|import|in|instanceof|interface|let|new|null|package|private|protected|public|return|super|switch|static|this|throw|try|true|typeof|var|void|while|with|yield)$/;
+const IDENTIFIER_REGEX =
+	/^[\p{L}\p{Nl}$_][\p{L}\p{Nl}$\p{Mn}\p{Mc}\p{Nd}\p{Pc}]*$/iu;
+
+/**
+ * Validates the library name by checking for keywords and valid characters
+ * @param {string} name name to be validated
+ * @returns {boolean} true, when valid
+ */
+const isNameValid = name =>
+	!KEYWORD_REGEX.test(name) && IDENTIFIER_REGEX.test(name);
+
+/**
+ * @param {string[]} accessor variable plus properties
+ * @param {number} existingLength items of accessor that are existing already
+ * @param {boolean=} initLast if the last property should also be initialized to an object
+ * @returns {string} code to access the accessor while initializing
+ */
+const accessWithInit = (accessor, existingLength, initLast = false) => {
+	// This generates for [a, b, c, d]:
+	// (((a = typeof a === "undefined" ? {} : a).b = a.b || {}).c = a.b.c || {}).d
+	const base = accessor[0];
+	if (accessor.length === 1 && !initLast) return base;
+	let current =
+		existingLength > 0
+			? base
+			: `(${base} = typeof ${base} === "undefined" ? {} : ${base})`;
+
+	// i is the current position in accessor that has been printed
+	let i = 1;
+
+	// all properties printed so far (excluding base)
+	/** @type {string[] | undefined} */
+	let propsSoFar;
+
+	// if there is existingLength, print all properties until this position as property access
+	if (existingLength > i) {
+		propsSoFar = accessor.slice(1, existingLength);
+		i = existingLength;
+		current += propertyAccess(propsSoFar);
+	} else {
+		propsSoFar = [];
+	}
+
+	// all remaining properties (except the last one when initLast is not set)
+	// should be printed as initializer
+	const initUntil = initLast ? accessor.length : accessor.length - 1;
+	for (; i < initUntil; i++) {
+		const prop = accessor[i];
+		propsSoFar.push(prop);
+		current = `(${current}${propertyAccess([prop])} = ${base}${propertyAccess(
+			propsSoFar
+		)} || {})`;
+	}
+
+	// print the last property as property access if not yet printed
+	if (i < accessor.length)
+		current = `${current}${propertyAccess([accessor[accessor.length - 1]])}`;
+
+	return current;
+};
+
+/**
+ * @typedef {object} AssignLibraryPluginOptions
+ * @property {LibraryType} type
+ * @property {string[] | "global"} prefix name prefix
+ * @property {string | false} declare declare name as variable
+ * @property {"error"|"static"|"copy"|"assign"} unnamed behavior for unnamed library name
+ * @property {"copy"|"assign"=} named behavior for named library name
+ */
+
+/**
+ * @typedef {object} AssignLibraryPluginParsed
+ * @property {string | string[]} name
+ * @property {string | string[] | undefined} export
+ */
+
+/**
+ * @typedef {AssignLibraryPluginParsed} T
+ * @extends {AbstractLibraryPlugin<AssignLibraryPluginParsed>}
+ */
+class AssignLibraryPlugin extends AbstractLibraryPlugin {
+	/**
+	 * @param {AssignLibraryPluginOptions} options the plugin options
+	 */
+	constructor(options) {
+		super({
+			pluginName: "AssignLibraryPlugin",
+			type: options.type
+		});
+		this.prefix = options.prefix;
+		this.declare = options.declare;
+		this.unnamed = options.unnamed;
+		this.named = options.named || "assign";
+	}
+
+	/**
+	 * @param {LibraryOptions} library normalized library option
+	 * @returns {T | false} preprocess as needed by overriding
+	 */
+	parseOptions(library) {
+		const { name } = library;
+		if (this.unnamed === "error") {
+			if (typeof name !== "string" && !Array.isArray(name)) {
+				throw new Error(
+					`Library name must be a string or string array. ${AbstractLibraryPlugin.COMMON_LIBRARY_NAME_MESSAGE}`
+				);
+			}
+		} else if (name && typeof name !== "string" && !Array.isArray(name)) {
+			throw new Error(
+				`Library name must be a string, string array or unset. ${AbstractLibraryPlugin.COMMON_LIBRARY_NAME_MESSAGE}`
+			);
+		}
+		const _name = /** @type {string | string[]} */ (name);
+		return {
+			name: _name,
+			export: library.export
+		};
+	}
+
+	/**
+	 * @param {Module} module the exporting entry module
+	 * @param {string} entryName the name of the entrypoint
+	 * @param {LibraryContext<T>} libraryContext context
+	 * @returns {void}
+	 */
+	finishEntryModule(
+		module,
+		entryName,
+		{ options, compilation, compilation: { moduleGraph } }
+	) {
+		const runtime = getEntryRuntime(compilation, entryName);
+		if (options.export) {
+			const exportsInfo = moduleGraph.getExportInfo(
+				module,
+				Array.isArray(options.export) ? options.export[0] : options.export
+			);
+			exportsInfo.setUsed(UsageState.Used, runtime);
+			exportsInfo.canMangleUse = false;
+		} else {
+			const exportsInfo = moduleGraph.getExportsInfo(module);
+			exportsInfo.setUsedInUnknownWay(runtime);
+		}
+		moduleGraph.addExtraReason(module, "used as library export");
+	}
+
+	/**
+	 * @param {Compilation} compilation the compilation
+	 * @returns {string[]} the prefix
+	 */
+	_getPrefix(compilation) {
+		return this.prefix === "global"
+			? [compilation.runtimeTemplate.globalObject]
+			: this.prefix;
+	}
+
+	/**
+	 * @param {AssignLibraryPluginParsed} options the library options
+	 * @param {Chunk} chunk the chunk
+	 * @param {Compilation} compilation the compilation
+	 * @returns {Array<string>} the resolved full name
+	 */
+	_getResolvedFullName(options, chunk, compilation) {
+		const prefix = this._getPrefix(compilation);
+		const fullName = options.name ? prefix.concat(options.name) : prefix;
+		return fullName.map(n =>
+			compilation.getPath(n, {
+				chunk
+			})
+		);
+	}
+
+	/**
+	 * @param {Source} source source
+	 * @param {RenderContext} renderContext render context
+	 * @param {LibraryContext<T>} libraryContext context
+	 * @returns {Source} source with library export
+	 */
+	render(source, { chunk }, { options, compilation }) {
+		const fullNameResolved = this._getResolvedFullName(
+			options,
+			chunk,
+			compilation
+		);
+		if (this.declare) {
+			const base = fullNameResolved[0];
+			if (!isNameValid(base)) {
+				throw new Error(
+					`Library name base (${base}) must be a valid identifier when using a var declaring library type. Either use a valid identifier (e. g. ${Template.toIdentifier(
+						base
+					)}) or use a different library type (e. g. 'type: "global"', which assign a property on the global scope instead of declaring a variable). ${
+						AbstractLibraryPlugin.COMMON_LIBRARY_NAME_MESSAGE
+					}`
+				);
+			}
+			source = new ConcatSource(`${this.declare} ${base};\n`, source);
+		}
+		return source;
+	}
+
+	/**
+	 * @param {Module} module the exporting entry module
+	 * @param {RenderContext} renderContext render context
+	 * @param {LibraryContext<T>} libraryContext context
+	 * @returns {string | undefined} bailout reason
+	 */
+	embedInRuntimeBailout(
+		module,
+		{ chunk, codeGenerationResults },
+		{ options, compilation }
+	) {
+		const { data } = codeGenerationResults.get(module, chunk.runtime);
+		const topLevelDeclarations =
+			(data && data.get("topLevelDeclarations")) ||
+			(module.buildInfo && module.buildInfo.topLevelDeclarations);
+		if (!topLevelDeclarations)
+			return "it doesn't tell about top level declarations.";
+		const fullNameResolved = this._getResolvedFullName(
+			options,
+			chunk,
+			compilation
+		);
+		const base = fullNameResolved[0];
+		if (topLevelDeclarations.has(base))
+			return `it declares '${base}' on top-level, which conflicts with the current library output.`;
+	}
+
+	/**
+	 * @param {RenderContext} renderContext render context
+	 * @param {LibraryContext<T>} libraryContext context
+	 * @returns {string | undefined} bailout reason
+	 */
+	strictRuntimeBailout({ chunk }, { options, compilation }) {
+		if (
+			this.declare ||
+			this.prefix === "global" ||
+			this.prefix.length > 0 ||
+			!options.name
+		) {
+			return;
+		}
+		return "a global variable is assign and maybe created";
+	}
+
+	/**
+	 * @param {Source} source source
+	 * @param {Module} module module
+	 * @param {StartupRenderContext} renderContext render context
+	 * @param {LibraryContext<T>} libraryContext context
+	 * @returns {Source} source with library export
+	 */
+	renderStartup(
+		source,
+		module,
+		{ moduleGraph, chunk },
+		{ options, compilation }
+	) {
+		const fullNameResolved = this._getResolvedFullName(
+			options,
+			chunk,
+			compilation
+		);
+		const staticExports = this.unnamed === "static";
+		const exportAccess = options.export
+			? propertyAccess(
+					Array.isArray(options.export) ? options.export : [options.export]
+				)
+			: "";
+		const result = new ConcatSource(source);
+		if (staticExports) {
+			const exportsInfo = moduleGraph.getExportsInfo(module);
+			const exportTarget = accessWithInit(
+				fullNameResolved,
+				this._getPrefix(compilation).length,
+				true
+			);
+
+			/** @type {string[]} */
+			const provided = [];
+			for (const exportInfo of exportsInfo.orderedExports) {
+				if (!exportInfo.provided) continue;
+				const nameAccess = propertyAccess([exportInfo.name]);
+				result.add(
+					`${exportTarget}${nameAccess} = ${RuntimeGlobals.exports}${exportAccess}${nameAccess};\n`
+				);
+				provided.push(exportInfo.name);
+			}
+
+			const webpackExportTarget = accessWithInit(
+				fullNameResolved,
+				this._getPrefix(compilation).length,
+				true
+			);
+			/** @type {string} */
+			let exports = RuntimeGlobals.exports;
+			if (exportAccess) {
+				result.add(
+					`var __webpack_exports_export__ = ${RuntimeGlobals.exports}${exportAccess};\n`
+				);
+				exports = "__webpack_exports_export__";
+			}
+			result.add(`for(var __webpack_i__ in ${exports}) {\n`);
+			const hasProvided = provided.length > 0;
+			if (hasProvided) {
+				result.add(
+					`  if (${JSON.stringify(provided)}.indexOf(__webpack_i__) === -1) {\n`
+				);
+			}
+			result.add(
+				`  ${hasProvided ? "  " : ""}${webpackExportTarget}[__webpack_i__] = ${exports}[__webpack_i__];\n`
+			);
+			result.add(hasProvided ? "  }\n}\n" : "\n");
+			result.add(
+				`Object.defineProperty(${exportTarget}, "__esModule", { value: true });\n`
+			);
+		} else if (options.name ? this.named === "copy" : this.unnamed === "copy") {
+			result.add(
+				`var __webpack_export_target__ = ${accessWithInit(
+					fullNameResolved,
+					this._getPrefix(compilation).length,
+					true
+				)};\n`
+			);
+			/** @type {string} */
+			let exports = RuntimeGlobals.exports;
+			if (exportAccess) {
+				result.add(
+					`var __webpack_exports_export__ = ${RuntimeGlobals.exports}${exportAccess};\n`
+				);
+				exports = "__webpack_exports_export__";
+			}
+			result.add(
+				`for(var __webpack_i__ in ${exports}) __webpack_export_target__[__webpack_i__] = ${exports}[__webpack_i__];\n`
+			);
+			result.add(
+				`if(${exports}.__esModule) Object.defineProperty(__webpack_export_target__, "__esModule", { value: true });\n`
+			);
+		} else {
+			result.add(
+				`${accessWithInit(
+					fullNameResolved,
+					this._getPrefix(compilation).length,
+					false
+				)} = ${RuntimeGlobals.exports}${exportAccess};\n`
+			);
+		}
+		return result;
+	}
+
+	/**
+	 * @param {Chunk} chunk the chunk
+	 * @param {Set<string>} set runtime requirements
+	 * @param {LibraryContext<T>} libraryContext context
+	 * @returns {void}
+	 */
+	runtimeRequirements(chunk, set, libraryContext) {
+		set.add(RuntimeGlobals.exports);
+	}
+
+	/**
+	 * @param {Chunk} chunk the chunk
+	 * @param {Hash} hash hash
+	 * @param {ChunkHashContext} chunkHashContext chunk hash context
+	 * @param {LibraryContext<T>} libraryContext context
+	 * @returns {void}
+	 */
+	chunkHash(chunk, hash, chunkHashContext, { options, compilation }) {
+		hash.update("AssignLibraryPlugin");
+		const fullNameResolved = this._getResolvedFullName(
+			options,
+			chunk,
+			compilation
+		);
+		if (options.name ? this.named === "copy" : this.unnamed === "copy") {
+			hash.update("copy");
+		}
+		if (this.declare) {
+			hash.update(this.declare);
+		}
+		hash.update(fullNameResolved.join("."));
+		if (options.export) {
+			hash.update(`${options.export}`);
+		}
+	}
+}
+
+module.exports = AssignLibraryPlugin;