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app_vue/node_modules/webpack/lib/ids/IdHelpers.js

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+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+
+"use strict";
+
+const createHash = require("../util/createHash");
+const { makePathsRelative } = require("../util/identifier");
+const numberHash = require("../util/numberHash");
+
+/** @typedef {import("../Chunk")} Chunk */
+/** @typedef {import("../ChunkGraph")} ChunkGraph */
+/** @typedef {import("../Compilation")} Compilation */
+/** @typedef {import("../Module")} Module */
+/** @typedef {typeof import("../util/Hash")} Hash */
+/** @typedef {import("../util/identifier").AssociatedObjectForCache} AssociatedObjectForCache */
+
+/**
+ * @param {string} str string to hash
+ * @param {number} len max length of the hash
+ * @param {string | Hash} hashFunction hash function to use
+ * @returns {string} hash
+ */
+const getHash = (str, len, hashFunction) => {
+	const hash = createHash(hashFunction);
+	hash.update(str);
+	const digest = /** @type {string} */ (hash.digest("hex"));
+	return digest.slice(0, len);
+};
+
+/**
+ * @param {string} str the string
+ * @returns {string} string prefixed by an underscore if it is a number
+ */
+const avoidNumber = str => {
+	// max length of a number is 21 chars, bigger numbers a written as "...e+xx"
+	if (str.length > 21) return str;
+	const firstChar = str.charCodeAt(0);
+	// skip everything that doesn't look like a number
+	// charCodes: "-": 45, "1": 49, "9": 57
+	if (firstChar < 49) {
+		if (firstChar !== 45) return str;
+	} else if (firstChar > 57) {
+		return str;
+	}
+	if (str === String(Number(str))) {
+		return `_${str}`;
+	}
+	return str;
+};
+
+/**
+ * @param {string} request the request
+ * @returns {string} id representation
+ */
+const requestToId = request =>
+	request.replace(/^(\.\.?\/)+/, "").replace(/(^[.-]|[^a-zA-Z0-9_-])+/g, "_");
+module.exports.requestToId = requestToId;
+
+/**
+ * @param {string} string the string
+ * @param {string} delimiter separator for string and hash
+ * @param {string | Hash} hashFunction hash function to use
+ * @returns {string} string with limited max length to 100 chars
+ */
+const shortenLongString = (string, delimiter, hashFunction) => {
+	if (string.length < 100) return string;
+	return (
+		string.slice(0, 100 - 6 - delimiter.length) +
+		delimiter +
+		getHash(string, 6, hashFunction)
+	);
+};
+
+/**
+ * @param {Module} module the module
+ * @param {string} context context directory
+ * @param {AssociatedObjectForCache=} associatedObjectForCache an object to which the cache will be attached
+ * @returns {string} short module name
+ */
+const getShortModuleName = (module, context, associatedObjectForCache) => {
+	const libIdent = module.libIdent({ context, associatedObjectForCache });
+	if (libIdent) return avoidNumber(libIdent);
+	const nameForCondition = module.nameForCondition();
+	if (nameForCondition)
+		return avoidNumber(
+			makePathsRelative(context, nameForCondition, associatedObjectForCache)
+		);
+	return "";
+};
+module.exports.getShortModuleName = getShortModuleName;
+
+/**
+ * @param {string} shortName the short name
+ * @param {Module} module the module
+ * @param {string} context context directory
+ * @param {string | Hash} hashFunction hash function to use
+ * @param {AssociatedObjectForCache=} associatedObjectForCache an object to which the cache will be attached
+ * @returns {string} long module name
+ */
+const getLongModuleName = (
+	shortName,
+	module,
+	context,
+	hashFunction,
+	associatedObjectForCache
+) => {
+	const fullName = getFullModuleName(module, context, associatedObjectForCache);
+	return `${shortName}?${getHash(fullName, 4, hashFunction)}`;
+};
+module.exports.getLongModuleName = getLongModuleName;
+
+/**
+ * @param {Module} module the module
+ * @param {string} context context directory
+ * @param {AssociatedObjectForCache=} associatedObjectForCache an object to which the cache will be attached
+ * @returns {string} full module name
+ */
+const getFullModuleName = (module, context, associatedObjectForCache) =>
+	makePathsRelative(context, module.identifier(), associatedObjectForCache);
+module.exports.getFullModuleName = getFullModuleName;
+
+/**
+ * @param {Chunk} chunk the chunk
+ * @param {ChunkGraph} chunkGraph the chunk graph
+ * @param {string} context context directory
+ * @param {string} delimiter delimiter for names
+ * @param {string | Hash} hashFunction hash function to use
+ * @param {AssociatedObjectForCache=} associatedObjectForCache an object to which the cache will be attached
+ * @returns {string} short chunk name
+ */
+const getShortChunkName = (
+	chunk,
+	chunkGraph,
+	context,
+	delimiter,
+	hashFunction,
+	associatedObjectForCache
+) => {
+	const modules = chunkGraph.getChunkRootModules(chunk);
+	const shortModuleNames = modules.map(m =>
+		requestToId(getShortModuleName(m, context, associatedObjectForCache))
+	);
+	chunk.idNameHints.sort();
+	const chunkName = Array.from(chunk.idNameHints)
+		.concat(shortModuleNames)
+		.filter(Boolean)
+		.join(delimiter);
+	return shortenLongString(chunkName, delimiter, hashFunction);
+};
+module.exports.getShortChunkName = getShortChunkName;
+
+/**
+ * @param {Chunk} chunk the chunk
+ * @param {ChunkGraph} chunkGraph the chunk graph
+ * @param {string} context context directory
+ * @param {string} delimiter delimiter for names
+ * @param {string | Hash} hashFunction hash function to use
+ * @param {AssociatedObjectForCache=} associatedObjectForCache an object to which the cache will be attached
+ * @returns {string} short chunk name
+ */
+const getLongChunkName = (
+	chunk,
+	chunkGraph,
+	context,
+	delimiter,
+	hashFunction,
+	associatedObjectForCache
+) => {
+	const modules = chunkGraph.getChunkRootModules(chunk);
+	const shortModuleNames = modules.map(m =>
+		requestToId(getShortModuleName(m, context, associatedObjectForCache))
+	);
+	const longModuleNames = modules.map(m =>
+		requestToId(
+			getLongModuleName("", m, context, hashFunction, associatedObjectForCache)
+		)
+	);
+	chunk.idNameHints.sort();
+	const chunkName = Array.from(chunk.idNameHints)
+		.concat(shortModuleNames, longModuleNames)
+		.filter(Boolean)
+		.join(delimiter);
+	return shortenLongString(chunkName, delimiter, hashFunction);
+};
+module.exports.getLongChunkName = getLongChunkName;
+
+/**
+ * @param {Chunk} chunk the chunk
+ * @param {ChunkGraph} chunkGraph the chunk graph
+ * @param {string} context context directory
+ * @param {AssociatedObjectForCache=} associatedObjectForCache an object to which the cache will be attached
+ * @returns {string} full chunk name
+ */
+const getFullChunkName = (
+	chunk,
+	chunkGraph,
+	context,
+	associatedObjectForCache
+) => {
+	if (chunk.name) return chunk.name;
+	const modules = chunkGraph.getChunkRootModules(chunk);
+	const fullModuleNames = modules.map(m =>
+		makePathsRelative(context, m.identifier(), associatedObjectForCache)
+	);
+	return fullModuleNames.join();
+};
+module.exports.getFullChunkName = getFullChunkName;
+
+/**
+ * @template K
+ * @template V
+ * @param {Map<K, V[]>} map a map from key to values
+ * @param {K} key key
+ * @param {V} value value
+ * @returns {void}
+ */
+const addToMapOfItems = (map, key, value) => {
+	let array = map.get(key);
+	if (array === undefined) {
+		array = [];
+		map.set(key, array);
+	}
+	array.push(value);
+};
+
+/**
+ * @param {Compilation} compilation the compilation
+ * @param {((module: Module) => boolean)=} filter filter modules
+ * @returns {[Set<string>, Module[]]} used module ids as strings and modules without id matching the filter
+ */
+const getUsedModuleIdsAndModules = (compilation, filter) => {
+	const chunkGraph = compilation.chunkGraph;
+
+	const modules = [];
+
+	/** @type {Set<string>} */
+	const usedIds = new Set();
+	if (compilation.usedModuleIds) {
+		for (const id of compilation.usedModuleIds) {
+			usedIds.add(String(id));
+		}
+	}
+
+	for (const module of compilation.modules) {
+		if (!module.needId) continue;
+		const moduleId = chunkGraph.getModuleId(module);
+		if (moduleId !== null) {
+			usedIds.add(String(moduleId));
+		} else if (
+			(!filter || filter(module)) &&
+			chunkGraph.getNumberOfModuleChunks(module) !== 0
+		) {
+			modules.push(module);
+		}
+	}
+
+	return [usedIds, modules];
+};
+module.exports.getUsedModuleIdsAndModules = getUsedModuleIdsAndModules;
+
+/**
+ * @param {Compilation} compilation the compilation
+ * @returns {Set<string>} used chunk ids as strings
+ */
+const getUsedChunkIds = compilation => {
+	/** @type {Set<string>} */
+	const usedIds = new Set();
+	if (compilation.usedChunkIds) {
+		for (const id of compilation.usedChunkIds) {
+			usedIds.add(String(id));
+		}
+	}
+
+	for (const chunk of compilation.chunks) {
+		const chunkId = chunk.id;
+		if (chunkId !== null) {
+			usedIds.add(String(chunkId));
+		}
+	}
+
+	return usedIds;
+};
+module.exports.getUsedChunkIds = getUsedChunkIds;
+
+/**
+ * @template T
+ * @param {Iterable<T>} items list of items to be named
+ * @param {(item: T) => string} getShortName get a short name for an item
+ * @param {(item: T, name: string) => string} getLongName get a long name for an item
+ * @param {(a: T, b: T) => -1 | 0 | 1} comparator order of items
+ * @param {Set<string>} usedIds already used ids, will not be assigned
+ * @param {(item: T, name: string) => void} assignName assign a name to an item
+ * @returns {T[]} list of items without a name
+ */
+const assignNames = (
+	items,
+	getShortName,
+	getLongName,
+	comparator,
+	usedIds,
+	assignName
+) => {
+	/** @type {Map<string, T[]>} */
+	const nameToItems = new Map();
+
+	for (const item of items) {
+		const name = getShortName(item);
+		addToMapOfItems(nameToItems, name, item);
+	}
+
+	/** @type {Map<string, T[]>} */
+	const nameToItems2 = new Map();
+
+	for (const [name, items] of nameToItems) {
+		if (items.length > 1 || !name) {
+			for (const item of items) {
+				const longName = getLongName(item, name);
+				addToMapOfItems(nameToItems2, longName, item);
+			}
+		} else {
+			addToMapOfItems(nameToItems2, name, items[0]);
+		}
+	}
+
+	/** @type {T[]} */
+	const unnamedItems = [];
+
+	for (const [name, items] of nameToItems2) {
+		if (!name) {
+			for (const item of items) {
+				unnamedItems.push(item);
+			}
+		} else if (items.length === 1 && !usedIds.has(name)) {
+			assignName(items[0], name);
+			usedIds.add(name);
+		} else {
+			items.sort(comparator);
+			let i = 0;
+			for (const item of items) {
+				while (nameToItems2.has(name + i) && usedIds.has(name + i)) i++;
+				assignName(item, name + i);
+				usedIds.add(name + i);
+				i++;
+			}
+		}
+	}
+
+	unnamedItems.sort(comparator);
+	return unnamedItems;
+};
+module.exports.assignNames = assignNames;
+
+/**
+ * @template T
+ * @param {T[]} items list of items to be named
+ * @param {(item: T) => string} getName get a name for an item
+ * @param {(a: T, n: T) => -1 | 0 | 1} comparator order of items
+ * @param {(item: T, id: number) => boolean} assignId assign an id to an item
+ * @param {number[]} ranges usable ranges for ids
+ * @param {number} expandFactor factor to create more ranges
+ * @param {number} extraSpace extra space to allocate, i. e. when some ids are already used
+ * @param {number} salt salting number to initialize hashing
+ * @returns {void}
+ */
+const assignDeterministicIds = (
+	items,
+	getName,
+	comparator,
+	assignId,
+	ranges = [10],
+	expandFactor = 10,
+	extraSpace = 0,
+	salt = 0
+) => {
+	items.sort(comparator);
+
+	// max 5% fill rate
+	const optimalRange = Math.min(
+		items.length * 20 + extraSpace,
+		Number.MAX_SAFE_INTEGER
+	);
+
+	let i = 0;
+	let range = ranges[i];
+	while (range < optimalRange) {
+		i++;
+		if (i < ranges.length) {
+			range = Math.min(ranges[i], Number.MAX_SAFE_INTEGER);
+		} else if (expandFactor) {
+			range = Math.min(range * expandFactor, Number.MAX_SAFE_INTEGER);
+		} else {
+			break;
+		}
+	}
+
+	for (const item of items) {
+		const ident = getName(item);
+		let id;
+		let i = salt;
+		do {
+			id = numberHash(ident + i++, range);
+		} while (!assignId(item, id));
+	}
+};
+module.exports.assignDeterministicIds = assignDeterministicIds;
+
+/**
+ * @param {Set<string>} usedIds used ids
+ * @param {Iterable<Module>} modules the modules
+ * @param {Compilation} compilation the compilation
+ * @returns {void}
+ */
+const assignAscendingModuleIds = (usedIds, modules, compilation) => {
+	const chunkGraph = compilation.chunkGraph;
+
+	let nextId = 0;
+	let assignId;
+	if (usedIds.size > 0) {
+		/**
+		 * @param {Module} module the module
+		 */
+		assignId = module => {
+			if (chunkGraph.getModuleId(module) === null) {
+				while (usedIds.has(String(nextId))) nextId++;
+				chunkGraph.setModuleId(module, nextId++);
+			}
+		};
+	} else {
+		/**
+		 * @param {Module} module the module
+		 */
+		assignId = module => {
+			if (chunkGraph.getModuleId(module) === null) {
+				chunkGraph.setModuleId(module, nextId++);
+			}
+		};
+	}
+	for (const module of modules) {
+		assignId(module);
+	}
+};
+module.exports.assignAscendingModuleIds = assignAscendingModuleIds;
+
+/**
+ * @param {Iterable<Chunk>} chunks the chunks
+ * @param {Compilation} compilation the compilation
+ * @returns {void}
+ */
+const assignAscendingChunkIds = (chunks, compilation) => {
+	const usedIds = getUsedChunkIds(compilation);
+
+	let nextId = 0;
+	if (usedIds.size > 0) {
+		for (const chunk of chunks) {
+			if (chunk.id === null) {
+				while (usedIds.has(String(nextId))) nextId++;
+				chunk.id = nextId;
+				chunk.ids = [nextId];
+				nextId++;
+			}
+		}
+	} else {
+		for (const chunk of chunks) {
+			if (chunk.id === null) {
+				chunk.id = nextId;
+				chunk.ids = [nextId];
+				nextId++;
+			}
+		}
+	}
+};
+module.exports.assignAscendingChunkIds = assignAscendingChunkIds;