react-carousel-query/node_modules/webpack/lib/FileSystemInfo.js

A infinite carousel component made with react that handles the pagination for you.

/*
	MIT License http://www.opensource.org/licenses/mit-license.php
	Author Tobias Koppers @sokra
*/

"use strict";

const { create: createResolver } = require("enhanced-resolve");
const nodeModule = require("module");
const asyncLib = require("neo-async");
const { isAbsolute } = require("path");
const AsyncQueue = require("./util/AsyncQueue");
const StackedCacheMap = require("./util/StackedCacheMap");
const createHash = require("./util/createHash");
const { join, dirname, relative, lstatReadlinkAbsolute } = require("./util/fs");
const makeSerializable = require("./util/makeSerializable");
const processAsyncTree = require("./util/processAsyncTree");

/** @typedef {import("enhanced-resolve").Resolver} Resolver */
/** @typedef {import("enhanced-resolve").ResolveRequest} ResolveRequest */
/** @typedef {import("enhanced-resolve").ResolveFunctionAsync} ResolveFunctionAsync */
/** @typedef {import("./WebpackError")} WebpackError */
/** @typedef {import("./logging/Logger").Logger} Logger */
/** @typedef {import("./serialization/ObjectMiddleware").ObjectDeserializerContext} ObjectDeserializerContext */
/** @typedef {import("./serialization/ObjectMiddleware").ObjectSerializerContext} ObjectSerializerContext */
/** @typedef {typeof import("./util/Hash")} Hash */
/** @typedef {import("./util/fs").IStats} IStats */
/** @typedef {import("./util/fs").InputFileSystem} InputFileSystem */
/** @typedef {import("./util/fs").PathLike} PathLike */
/** @typedef {import("./util/fs").StringCallback} StringCallback */
/**
 * @template T
 * @typedef {import("./util/AsyncQueue").Callback<T>} ProcessorCallback
 */
/**
 * @template T, R
 * @typedef {import("./util/AsyncQueue").Processor<T, R>} Processor
 */

const supportsEsm = Number(process.versions.modules) >= 83;

/** @type {Set<string>} */
const builtinModules = new Set(nodeModule.builtinModules);

let FS_ACCURACY = 2000;

const EMPTY_SET = new Set();

const RBDT_RESOLVE_CJS = 0;
const RBDT_RESOLVE_ESM = 1;
const RBDT_RESOLVE_DIRECTORY = 2;
const RBDT_RESOLVE_CJS_FILE = 3;
const RBDT_RESOLVE_CJS_FILE_AS_CHILD = 4;
const RBDT_RESOLVE_ESM_FILE = 5;
const RBDT_DIRECTORY = 6;
const RBDT_FILE = 7;
const RBDT_DIRECTORY_DEPENDENCIES = 8;
const RBDT_FILE_DEPENDENCIES = 9;

/** @typedef {RBDT_RESOLVE_CJS | RBDT_RESOLVE_ESM | RBDT_RESOLVE_DIRECTORY | RBDT_RESOLVE_CJS_FILE | RBDT_RESOLVE_CJS_FILE_AS_CHILD | RBDT_RESOLVE_ESM_FILE | RBDT_DIRECTORY | RBDT_FILE | RBDT_DIRECTORY_DEPENDENCIES | RBDT_FILE_DEPENDENCIES} JobType */

const INVALID = Symbol("invalid");

/**
 * @typedef {object} FileSystemInfoEntry
 * @property {number} safeTime
 * @property {number=} timestamp
 */

/**
 * @typedef {object} ResolvedContextFileSystemInfoEntry
 * @property {number} safeTime
 * @property {string=} timestampHash
 */

/**
 * @typedef {object} ContextFileSystemInfoEntry
 * @property {number} safeTime
 * @property {string=} timestampHash
 * @property {ResolvedContextFileSystemInfoEntry=} resolved
 * @property {Set<string>=} symlinks
 */

/**
 * @typedef {object} TimestampAndHash
 * @property {number} safeTime
 * @property {number=} timestamp
 * @property {string} hash
 */

/**
 * @typedef {object} ResolvedContextTimestampAndHash
 * @property {number} safeTime
 * @property {string=} timestampHash
 * @property {string} hash
 */

/** @typedef {Set<string>} Symlinks */

/**
 * @typedef {object} ContextTimestampAndHash
 * @property {number} safeTime
 * @property {string=} timestampHash
 * @property {string} hash
 * @property {ResolvedContextTimestampAndHash=} resolved
 * @property {Symlinks=} symlinks
 */

/**
 * @typedef {object} ContextHash
 * @property {string} hash
 * @property {string=} resolved
 * @property {Symlinks=} symlinks
 */

/** @typedef {Set<string>} SnapshotContent */

/**
 * @typedef {object} SnapshotOptimizationEntry
 * @property {Snapshot} snapshot
 * @property {number} shared
 * @property {SnapshotContent | undefined} snapshotContent
 * @property {Set<SnapshotOptimizationEntry> | undefined} children
 */

/**
 * @typedef {object} ResolveBuildDependenciesResult
 * @property {Set<string>} files list of files
 * @property {Set<string>} directories list of directories
 * @property {Set<string>} missing list of missing entries
 * @property {Map<string, string | false | undefined>} resolveResults stored resolve results
 * @property {object} resolveDependencies dependencies of the resolving
 * @property {Set<string>} resolveDependencies.files list of files
 * @property {Set<string>} resolveDependencies.directories list of directories
 * @property {Set<string>} resolveDependencies.missing list of missing entries
 */

/**
 * @typedef {object} SnapshotOptions
 * @property {boolean=} hash should use hash to snapshot
 * @property {boolean=} timestamp should use timestamp to snapshot
 */

const DONE_ITERATOR_RESULT = new Set().keys().next();

// cspell:word tshs
// Tsh = Timestamp + Hash
// Tshs = Timestamp + Hash combinations

class SnapshotIterator {
	/**
	 * @param {() => IteratorResult<string>} next next
	 */
	constructor(next) {
		this.next = next;
	}
}

/**
 * @typedef {(snapshot: Snapshot) => (Map<string, any> | Set<string> | undefined)[]} GetMapsFunction
 */

class SnapshotIterable {
	/**
	 * @param {Snapshot} snapshot snapshot
	 * @param {GetMapsFunction} getMaps get maps function
	 */
	constructor(snapshot, getMaps) {
		this.snapshot = snapshot;
		this.getMaps = getMaps;
	}

	[Symbol.iterator]() {
		let state = 0;
		/** @type {IterableIterator<string>} */
		let it;
		/** @type {(snapshot: Snapshot) => (Map<string, any> | Set<string> | undefined)[]} */
		let getMaps;
		/** @type {(Map<string, any> | Set<string> | undefined)[]} */
		let maps;
		/** @type {Snapshot} */
		let snapshot;
		/** @type {Snapshot[] | undefined} */
		let queue;
		return new SnapshotIterator(() => {
			for (;;) {
				switch (state) {
					case 0:
						snapshot = this.snapshot;
						getMaps = this.getMaps;
						maps = getMaps(snapshot);
						state = 1;
					/* falls through */
					case 1:
						if (maps.length > 0) {
							const map = maps.pop();
							if (map !== undefined) {
								it = map.keys();
								state = 2;
							} else {
								break;
							}
						} else {
							state = 3;
							break;
						}
					/* falls through */
					case 2: {
						const result = it.next();
						if (!result.done) return result;
						state = 1;
						break;
					}
					case 3: {
						const children = snapshot.children;
						if (children !== undefined) {
							if (children.size === 1) {
								// shortcut for a single child
								// avoids allocation of queue
								for (const child of children) snapshot = child;
								maps = getMaps(snapshot);
								state = 1;
								break;
							}
							if (queue === undefined) queue = [];
							for (const child of children) {
								queue.push(child);
							}
						}
						if (queue !== undefined && queue.length > 0) {
							snapshot = /** @type {Snapshot} */ (queue.pop());
							maps = getMaps(snapshot);
							state = 1;
							break;
						} else {
							state = 4;
						}
					}
					/* falls through */
					case 4:
						return DONE_ITERATOR_RESULT;
				}
			}
		});
	}
}

/** @typedef {Map<string, FileSystemInfoEntry | null>} FileTimestamps */
/** @typedef {Map<string, string | null>} FileHashes */
/** @typedef {Map<string, TimestampAndHash | string | null>} FileTshs */
/** @typedef {Map<string, ResolvedContextFileSystemInfoEntry | null>} ContextTimestamps */
/** @typedef {Map<string, string | null>} ContextHashes */
/** @typedef {Map<string, ResolvedContextTimestampAndHash | null>} ContextTshs */
/** @typedef {Map<string, boolean>} MissingExistence */
/** @typedef {Map<string, string>} ManagedItemInfo */
/** @typedef {Set<string>} ManagedFiles */
/** @typedef {Set<string>} ManagedContexts */
/** @typedef {Set<string>} ManagedMissing */
/** @typedef {Set<Snapshot>} Children */

class Snapshot {
	constructor() {
		this._flags = 0;
		/** @type {Iterable<string> | undefined} */
		this._cachedFileIterable = undefined;
		/** @type {Iterable<string> | undefined} */
		this._cachedContextIterable = undefined;
		/** @type {Iterable<string> | undefined} */
		this._cachedMissingIterable = undefined;
		/** @type {number | undefined} */
		this.startTime = undefined;
		/** @type {FileTimestamps | undefined} */
		this.fileTimestamps = undefined;
		/** @type {FileHashes | undefined} */
		this.fileHashes = undefined;
		/** @type {FileTshs | undefined} */
		this.fileTshs = undefined;
		/** @type {ContextTimestamps | undefined} */
		this.contextTimestamps = undefined;
		/** @type {ContextHashes | undefined} */
		this.contextHashes = undefined;
		/** @type {ContextTshs | undefined} */
		this.contextTshs = undefined;
		/** @type {MissingExistence | undefined} */
		this.missingExistence = undefined;
		/** @type {ManagedItemInfo | undefined} */
		this.managedItemInfo = undefined;
		/** @type {ManagedFiles | undefined} */
		this.managedFiles = undefined;
		/** @type {ManagedContexts | undefined} */
		this.managedContexts = undefined;
		/** @type {ManagedMissing | undefined} */
		this.managedMissing = undefined;
		/** @type {Children | undefined} */
		this.children = undefined;
	}

	hasStartTime() {
		return (this._flags & 1) !== 0;
	}

	/**
	 * @param {number} value start value
	 */
	setStartTime(value) {
		this._flags = this._flags | 1;
		this.startTime = value;
	}

	/**
	 * @param {number | undefined} value value
	 * @param {Snapshot} snapshot snapshot
	 */
	setMergedStartTime(value, snapshot) {
		if (value) {
			if (snapshot.hasStartTime()) {
				this.setStartTime(
					Math.min(
						value,
						/** @type {NonNullable<Snapshot["startTime"]>} */
						(snapshot.startTime)
					)
				);
			} else {
				this.setStartTime(value);
			}
		} else if (snapshot.hasStartTime()) {
			this.setStartTime(
				/** @type {NonNullable<Snapshot["startTime"]>} */
				(snapshot.startTime)
			);
		}
	}

	hasFileTimestamps() {
		return (this._flags & 2) !== 0;
	}

	/**
	 * @param {FileTimestamps} value file timestamps
	 */
	setFileTimestamps(value) {
		this._flags = this._flags | 2;
		this.fileTimestamps = value;
	}

	hasFileHashes() {
		return (this._flags & 4) !== 0;
	}

	/**
	 * @param {FileHashes} value file hashes
	 */
	setFileHashes(value) {
		this._flags = this._flags | 4;
		this.fileHashes = value;
	}

	hasFileTshs() {
		return (this._flags & 8) !== 0;
	}

	/**
	 * @param {FileTshs} value file tshs
	 */
	setFileTshs(value) {
		this._flags = this._flags | 8;
		this.fileTshs = value;
	}

	hasContextTimestamps() {
		return (this._flags & 0x10) !== 0;
	}

	/**
	 * @param {ContextTimestamps} value context timestamps
	 */
	setContextTimestamps(value) {
		this._flags = this._flags | 0x10;
		this.contextTimestamps = value;
	}

	hasContextHashes() {
		return (this._flags & 0x20) !== 0;
	}

	/**
	 * @param {ContextHashes} value context hashes
	 */
	setContextHashes(value) {
		this._flags = this._flags | 0x20;
		this.contextHashes = value;
	}

	hasContextTshs() {
		return (this._flags & 0x40) !== 0;
	}

	/**
	 * @param {ContextTshs} value context tshs
	 */
	setContextTshs(value) {
		this._flags = this._flags | 0x40;
		this.contextTshs = value;
	}

	hasMissingExistence() {
		return (this._flags & 0x80) !== 0;
	}

	/**
	 * @param {MissingExistence} value context tshs
	 */
	setMissingExistence(value) {
		this._flags = this._flags | 0x80;
		this.missingExistence = value;
	}

	hasManagedItemInfo() {
		return (this._flags & 0x100) !== 0;
	}

	/**
	 * @param {ManagedItemInfo} value managed item info
	 */
	setManagedItemInfo(value) {
		this._flags = this._flags | 0x100;
		this.managedItemInfo = value;
	}

	hasManagedFiles() {
		return (this._flags & 0x200) !== 0;
	}

	/**
	 * @param {ManagedFiles} value managed files
	 */
	setManagedFiles(value) {
		this._flags = this._flags | 0x200;
		this.managedFiles = value;
	}

	hasManagedContexts() {
		return (this._flags & 0x400) !== 0;
	}

	/**
	 * @param {ManagedContexts} value managed contexts
	 */
	setManagedContexts(value) {
		this._flags = this._flags | 0x400;
		this.managedContexts = value;
	}

	hasManagedMissing() {
		return (this._flags & 0x800) !== 0;
	}

	/**
	 * @param {ManagedMissing} value managed missing
	 */
	setManagedMissing(value) {
		this._flags = this._flags | 0x800;
		this.managedMissing = value;
	}

	hasChildren() {
		return (this._flags & 0x1000) !== 0;
	}

	/**
	 * @param {Children} value children
	 */
	setChildren(value) {
		this._flags = this._flags | 0x1000;
		this.children = value;
	}

	/**
	 * @param {Snapshot} child children
	 */
	addChild(child) {
		if (!this.hasChildren()) {
			this.setChildren(new Set());
		}
		/** @type {Children} */
		(this.children).add(child);
	}

	/**
	 * @param {ObjectSerializerContext} context context
	 */
	serialize({ write }) {
		write(this._flags);
		if (this.hasStartTime()) write(this.startTime);
		if (this.hasFileTimestamps()) write(this.fileTimestamps);
		if (this.hasFileHashes()) write(this.fileHashes);
		if (this.hasFileTshs()) write(this.fileTshs);
		if (this.hasContextTimestamps()) write(this.contextTimestamps);
		if (this.hasContextHashes()) write(this.contextHashes);
		if (this.hasContextTshs()) write(this.contextTshs);
		if (this.hasMissingExistence()) write(this.missingExistence);
		if (this.hasManagedItemInfo()) write(this.managedItemInfo);
		if (this.hasManagedFiles()) write(this.managedFiles);
		if (this.hasManagedContexts()) write(this.managedContexts);
		if (this.hasManagedMissing()) write(this.managedMissing);
		if (this.hasChildren()) write(this.children);
	}

	/**
	 * @param {ObjectDeserializerContext} context context
	 */
	deserialize({ read }) {
		this._flags = read();
		if (this.hasStartTime()) this.startTime = read();
		if (this.hasFileTimestamps()) this.fileTimestamps = read();
		if (this.hasFileHashes()) this.fileHashes = read();
		if (this.hasFileTshs()) this.fileTshs = read();
		if (this.hasContextTimestamps()) this.contextTimestamps = read();
		if (this.hasContextHashes()) this.contextHashes = read();
		if (this.hasContextTshs()) this.contextTshs = read();
		if (this.hasMissingExistence()) this.missingExistence = read();
		if (this.hasManagedItemInfo()) this.managedItemInfo = read();
		if (this.hasManagedFiles()) this.managedFiles = read();
		if (this.hasManagedContexts()) this.managedContexts = read();
		if (this.hasManagedMissing()) this.managedMissing = read();
		if (this.hasChildren()) this.children = read();
	}

	/**
	 * @param {GetMapsFunction} getMaps first
	 * @returns {Iterable<string>} iterable
	 */
	_createIterable(getMaps) {
		return new SnapshotIterable(this, getMaps);
	}

	/**
	 * @returns {Iterable<string>} iterable
	 */
	getFileIterable() {
		if (this._cachedFileIterable === undefined) {
			this._cachedFileIterable = this._createIterable(s => [
				s.fileTimestamps,
				s.fileHashes,
				s.fileTshs,
				s.managedFiles
			]);
		}
		return this._cachedFileIterable;
	}

	/**
	 * @returns {Iterable<string>} iterable
	 */
	getContextIterable() {
		if (this._cachedContextIterable === undefined) {
			this._cachedContextIterable = this._createIterable(s => [
				s.contextTimestamps,
				s.contextHashes,
				s.contextTshs,
				s.managedContexts
			]);
		}
		return this._cachedContextIterable;
	}

	/**
	 * @returns {Iterable<string>} iterable
	 */
	getMissingIterable() {
		if (this._cachedMissingIterable === undefined) {
			this._cachedMissingIterable = this._createIterable(s => [
				s.missingExistence,
				s.managedMissing
			]);
		}
		return this._cachedMissingIterable;
	}
}

makeSerializable(Snapshot, "webpack/lib/FileSystemInfo", "Snapshot");

const MIN_COMMON_SNAPSHOT_SIZE = 3;

/**
 * @template U, T
 * @typedef {U extends true ? Set<string> : Map<string, T>} SnapshotOptimizationValue
 */

/**
 * @template T
 * @template {boolean} [U=false]
 */
class SnapshotOptimization {
	/**
	 * @param {function(Snapshot): boolean} has has value
	 * @param {function(Snapshot): SnapshotOptimizationValue<U, T> | undefined} get get value
	 * @param {function(Snapshot, SnapshotOptimizationValue<U, T>): void} set set value
	 * @param {boolean=} useStartTime use the start time of snapshots
	 * @param {U=} isSet value is an Set instead of a Map
	 */
	constructor(
		has,
		get,
		set,
		useStartTime = true,
		isSet = /** @type {U} */ (false)
	) {
		this._has = has;
		this._get = get;
		this._set = set;
		this._useStartTime = useStartTime;
		/** @type {U} */
		this._isSet = isSet;
		/** @type {Map<string, SnapshotOptimizationEntry>} */
		this._map = new Map();
		this._statItemsShared = 0;
		this._statItemsUnshared = 0;
		this._statSharedSnapshots = 0;
		this._statReusedSharedSnapshots = 0;
	}

	getStatisticMessage() {
		const total = this._statItemsShared + this._statItemsUnshared;
		if (total === 0) return;
		return `${
			this._statItemsShared && Math.round((this._statItemsShared * 100) / total)
		}% (${this._statItemsShared}/${total}) entries shared via ${
			this._statSharedSnapshots
		} shared snapshots (${
			this._statReusedSharedSnapshots + this._statSharedSnapshots
		} times referenced)`;
	}

	clear() {
		this._map.clear();
		this._statItemsShared = 0;
		this._statItemsUnshared = 0;
		this._statSharedSnapshots = 0;
		this._statReusedSharedSnapshots = 0;
	}

	/**
	 * @param {Snapshot} newSnapshot snapshot
	 * @param {Set<string>} capturedFiles files to snapshot/share
	 * @returns {void}
	 */
	optimize(newSnapshot, capturedFiles) {
		/**
		 * @param {SnapshotOptimizationEntry} entry optimization entry
		 * @returns {void}
		 */
		const increaseSharedAndStoreOptimizationEntry = entry => {
			if (entry.children !== undefined) {
				for (const child of entry.children) {
					increaseSharedAndStoreOptimizationEntry(child);
				}
			}
			entry.shared++;
			storeOptimizationEntry(entry);
		};
		/**
		 * @param {SnapshotOptimizationEntry} entry optimization entry
		 * @returns {void}
		 */
		const storeOptimizationEntry = entry => {
			for (const path of /** @type {SnapshotContent} */ (
				entry.snapshotContent
			)) {
				const old =
					/** @type {SnapshotOptimizationEntry} */
					(this._map.get(path));
				if (old.shared < entry.shared) {
					this._map.set(path, entry);
				}
				capturedFiles.delete(path);
			}
		};

		/** @type {SnapshotOptimizationEntry | undefined} */
		let newOptimizationEntry;

		const capturedFilesSize = capturedFiles.size;

		/** @type {Set<SnapshotOptimizationEntry> | undefined} */
		const optimizationEntries = new Set();

		for (const path of capturedFiles) {
			const optimizationEntry = this._map.get(path);
			if (optimizationEntry === undefined) {
				if (newOptimizationEntry === undefined) {
					newOptimizationEntry = {
						snapshot: newSnapshot,
						shared: 0,
						snapshotContent: undefined,
						children: undefined
					};
				}
				this._map.set(path, newOptimizationEntry);
				continue;
			} else {
				optimizationEntries.add(optimizationEntry);
			}
		}

		optimizationEntriesLabel: for (const optimizationEntry of optimizationEntries) {
			const snapshot = optimizationEntry.snapshot;
			if (optimizationEntry.shared > 0) {
				// It's a shared snapshot
				// We can't change it, so we can only use it when all files match
				// and startTime is compatible
				if (
					this._useStartTime &&
					newSnapshot.startTime &&
					(!snapshot.startTime || snapshot.startTime > newSnapshot.startTime)
				) {
					continue;
				}
				const nonSharedFiles = new Set();
				const snapshotContent =
					/** @type {NonNullable<SnapshotOptimizationEntry["snapshotContent"]>} */
					(optimizationEntry.snapshotContent);
				const snapshotEntries =
					/** @type {SnapshotOptimizationValue<U, T>} */
					(this._get(snapshot));
				for (const path of snapshotContent) {
					if (!capturedFiles.has(path)) {
						if (!snapshotEntries.has(path)) {
							// File is not shared and can't be removed from the snapshot
							// because it's in a child of the snapshot
							continue optimizationEntriesLabel;
						}
						nonSharedFiles.add(path);
						continue;
					}
				}
				if (nonSharedFiles.size === 0) {
					// The complete snapshot is shared
					// add it as child
					newSnapshot.addChild(snapshot);
					increaseSharedAndStoreOptimizationEntry(optimizationEntry);
					this._statReusedSharedSnapshots++;
				} else {
					// Only a part of the snapshot is shared
					const sharedCount = snapshotContent.size - nonSharedFiles.size;
					if (sharedCount < MIN_COMMON_SNAPSHOT_SIZE) {
						// Common part it too small
						continue;
					}
					// Extract common timestamps from both snapshots
					let commonMap;
					if (this._isSet) {
						commonMap = new Set();
						for (const path of /** @type {Set<string>} */ (snapshotEntries)) {
							if (nonSharedFiles.has(path)) continue;
							commonMap.add(path);
							snapshotEntries.delete(path);
						}
					} else {
						commonMap = new Map();
						const map = /** @type {Map<string, T>} */ (snapshotEntries);
						for (const [path, value] of map) {
							if (nonSharedFiles.has(path)) continue;
							commonMap.set(path, value);
							snapshotEntries.delete(path);
						}
					}
					// Create and attach snapshot
					const commonSnapshot = new Snapshot();
					if (this._useStartTime) {
						commonSnapshot.setMergedStartTime(newSnapshot.startTime, snapshot);
					}
					this._set(
						commonSnapshot,
						/** @type {SnapshotOptimizationValue<U, T>} */ (commonMap)
					);
					newSnapshot.addChild(commonSnapshot);
					snapshot.addChild(commonSnapshot);
					// Create optimization entry
					const newEntry = {
						snapshot: commonSnapshot,
						shared: optimizationEntry.shared + 1,
						snapshotContent: new Set(commonMap.keys()),
						children: undefined
					};
					if (optimizationEntry.children === undefined)
						optimizationEntry.children = new Set();
					optimizationEntry.children.add(newEntry);
					storeOptimizationEntry(newEntry);
					this._statSharedSnapshots++;
				}
			} else {
				// It's a unshared snapshot
				// We can extract a common shared snapshot
				// with all common files
				const snapshotEntries = this._get(snapshot);
				if (snapshotEntries === undefined) {
					// Incomplete snapshot, that can't be used
					continue;
				}
				let commonMap;
				if (this._isSet) {
					commonMap = new Set();
					const set = /** @type {Set<string>} */ (snapshotEntries);
					if (capturedFiles.size < set.size) {
						for (const path of capturedFiles) {
							if (set.has(path)) commonMap.add(path);
						}
					} else {
						for (const path of set) {
							if (capturedFiles.has(path)) commonMap.add(path);
						}
					}
				} else {
					commonMap = new Map();
					const map = /** @type {Map<string, T>} */ (snapshotEntries);
					for (const path of capturedFiles) {
						const ts = map.get(path);
						if (ts === undefined) continue;
						commonMap.set(path, ts);
					}
				}

				if (commonMap.size < MIN_COMMON_SNAPSHOT_SIZE) {
					// Common part it too small
					continue;
				}
				// Create and attach snapshot
				const commonSnapshot = new Snapshot();
				if (this._useStartTime) {
					commonSnapshot.setMergedStartTime(newSnapshot.startTime, snapshot);
				}
				this._set(
					commonSnapshot,
					/** @type {SnapshotOptimizationValue<U, T>} */
					(commonMap)
				);
				newSnapshot.addChild(commonSnapshot);
				snapshot.addChild(commonSnapshot);
				// Remove files from snapshot
				for (const path of commonMap.keys()) snapshotEntries.delete(path);
				const sharedCount = commonMap.size;
				this._statItemsUnshared -= sharedCount;
				this._statItemsShared += sharedCount;
				// Create optimization entry
				storeOptimizationEntry({
					snapshot: commonSnapshot,
					shared: 2,
					snapshotContent: new Set(commonMap.keys()),
					children: undefined
				});
				this._statSharedSnapshots++;
			}
		}
		const unshared = capturedFiles.size;
		this._statItemsUnshared += unshared;
		this._statItemsShared += capturedFilesSize - unshared;
	}
}

/**
 * @param {string} str input
 * @returns {string} result
 */
const parseString = str => {
	if (str[0] === "'" || str[0] === "`")
		str = `"${str.slice(1, -1).replace(/"/g, '\\"')}"`;
	return JSON.parse(str);
};

/* istanbul ignore next */
/**
 * @param {number} mtime mtime
 */
const applyMtime = mtime => {
	if (FS_ACCURACY > 1 && mtime % 2 !== 0) FS_ACCURACY = 1;
	else if (FS_ACCURACY > 10 && mtime % 20 !== 0) FS_ACCURACY = 10;
	else if (FS_ACCURACY > 100 && mtime % 200 !== 0) FS_ACCURACY = 100;
	else if (FS_ACCURACY > 1000 && mtime % 2000 !== 0) FS_ACCURACY = 1000;
};

/**
 * @template T
 * @template K
 * @param {Map<T, K> | undefined} a source map
 * @param {Map<T, K> | undefined} b joining map
 * @returns {Map<T, K>} joined map
 */
const mergeMaps = (a, b) => {
	if (!b || b.size === 0) return /** @type {Map<T, K>} */ (a);
	if (!a || a.size === 0) return /** @type {Map<T, K>} */ (b);
	/** @type {Map<T, K>} */
	const map = new Map(a);
	for (const [key, value] of b) {
		map.set(key, value);
	}
	return map;
};

/**
 * @template T
 * @param {Set<T> | undefined} a source map
 * @param {Set<T> | undefined} b joining map
 * @returns {Set<T>} joined map
 */
const mergeSets = (a, b) => {
	if (!b || b.size === 0) return /** @type {Set<T>} */ (a);
	if (!a || a.size === 0) return /** @type {Set<T>} */ (b);
	/** @type {Set<T>} */
	const map = new Set(a);
	for (const item of b) {
		map.add(item);
	}
	return map;
};

/**
 * Finding file or directory to manage
 * @param {string} managedPath path that is managing by {@link FileSystemInfo}
 * @param {string} path path to file or directory
 * @returns {string|null} managed item
 * @example
 * getManagedItem(
 *   '/Users/user/my-project/node_modules/',
 *   '/Users/user/my-project/node_modules/package/index.js'
 * ) === '/Users/user/my-project/node_modules/package'
 * getManagedItem(
 *   '/Users/user/my-project/node_modules/',
 *   '/Users/user/my-project/node_modules/package1/node_modules/package2'
 * ) === '/Users/user/my-project/node_modules/package1/node_modules/package2'
 * getManagedItem(
 *   '/Users/user/my-project/node_modules/',
 *   '/Users/user/my-project/node_modules/.bin/script.js'
 * ) === null // hidden files are disallowed as managed items
 * getManagedItem(
 *   '/Users/user/my-project/node_modules/',
 *   '/Users/user/my-project/node_modules/package'
 * ) === '/Users/user/my-project/node_modules/package'
 */
const getManagedItem = (managedPath, path) => {
	let i = managedPath.length;
	let slashes = 1;
	let startingPosition = true;
	loop: while (i < path.length) {
		switch (path.charCodeAt(i)) {
			case 47: // slash
			case 92: // backslash
				if (--slashes === 0) break loop;
				startingPosition = true;
				break;
			case 46: // .
				// hidden files are disallowed as managed items
				// it's probably .yarn-integrity or .cache
				if (startingPosition) return null;
				break;
			case 64: // @
				if (!startingPosition) return null;
				slashes++;
				break;
			default:
				startingPosition = false;
				break;
		}
		i++;
	}
	if (i === path.length) slashes--;
	// return null when path is incomplete
	if (slashes !== 0) return null;
	// if (path.slice(i + 1, i + 13) === "node_modules")
	if (
		path.length >= i + 13 &&
		path.charCodeAt(i + 1) === 110 &&
		path.charCodeAt(i + 2) === 111 &&
		path.charCodeAt(i + 3) === 100 &&
		path.charCodeAt(i + 4) === 101 &&
		path.charCodeAt(i + 5) === 95 &&
		path.charCodeAt(i + 6) === 109 &&
		path.charCodeAt(i + 7) === 111 &&
		path.charCodeAt(i + 8) === 100 &&
		path.charCodeAt(i + 9) === 117 &&
		path.charCodeAt(i + 10) === 108 &&
		path.charCodeAt(i + 11) === 101 &&
		path.charCodeAt(i + 12) === 115
	) {
		// if this is the end of the path
		if (path.length === i + 13) {
			// return the node_modules directory
			// it's special
			return path;
		}
		const c = path.charCodeAt(i + 13);
		// if next symbol is slash or backslash
		if (c === 47 || c === 92) {
			// Managed subpath
			return getManagedItem(path.slice(0, i + 14), path);
		}
	}
	return path.slice(0, i);
};

/**
 * @template {ContextFileSystemInfoEntry | ContextTimestampAndHash} T
 * @param {T | null} entry entry
 * @returns {T["resolved"] | null | undefined} the resolved entry
 */
const getResolvedTimestamp = entry => {
	if (entry === null) return null;
	if (entry.resolved !== undefined) return entry.resolved;
	return entry.symlinks === undefined ? entry : undefined;
};

/**
 * @param {ContextHash | null} entry entry
 * @returns {string | null | undefined} the resolved entry
 */
const getResolvedHash = entry => {
	if (entry === null) return null;
	if (entry.resolved !== undefined) return entry.resolved;
	return entry.symlinks === undefined ? entry.hash : undefined;
};

/**
 * @template T
 * @param {Set<T>} source source
 * @param {Set<T>} target target
 */
const addAll = (source, target) => {
	for (const key of source) target.add(key);
};

/** @typedef {Set<string>} LoggedPaths */

/**
 * Used to access information about the filesystem in a cached way
 */
class FileSystemInfo {
	/**
	 * @param {InputFileSystem} fs file system
	 * @param {object} options options
	 * @param {Iterable<string | RegExp>=} options.unmanagedPaths paths that are not managed by a package manager and the contents are subject to change
	 * @param {Iterable<string | RegExp>=} options.managedPaths paths that are only managed by a package manager
	 * @param {Iterable<string | RegExp>=} options.immutablePaths paths that are immutable
	 * @param {Logger=} options.logger logger used to log invalid snapshots
	 * @param {string | Hash=} options.hashFunction the hash function to use
	 */
	constructor(
		fs,
		{
			unmanagedPaths = [],
			managedPaths = [],
			immutablePaths = [],
			logger,
			hashFunction = "md4"
		} = {}
	) {
		this.fs = fs;
		this.logger = logger;
		this._remainingLogs = logger ? 40 : 0;
		/** @type {LoggedPaths | undefined} */
		this._loggedPaths = logger ? new Set() : undefined;
		this._hashFunction = hashFunction;
		/** @type {WeakMap<Snapshot, boolean | (function((WebpackError | null)=, boolean=): void)[]>} */
		this._snapshotCache = new WeakMap();
		this._fileTimestampsOptimization = new SnapshotOptimization(
			s => s.hasFileTimestamps(),
			s => s.fileTimestamps,
			(s, v) => s.setFileTimestamps(v)
		);
		this._fileHashesOptimization = new SnapshotOptimization(
			s => s.hasFileHashes(),
			s => s.fileHashes,
			(s, v) => s.setFileHashes(v),
			false
		);
		this._fileTshsOptimization = new SnapshotOptimization(
			s => s.hasFileTshs(),
			s => s.fileTshs,
			(s, v) => s.setFileTshs(v)
		);
		this._contextTimestampsOptimization = new SnapshotOptimization(
			s => s.hasContextTimestamps(),
			s => s.contextTimestamps,
			(s, v) => s.setContextTimestamps(v)
		);
		this._contextHashesOptimization = new SnapshotOptimization(
			s => s.hasContextHashes(),
			s => s.contextHashes,
			(s, v) => s.setContextHashes(v),
			false
		);
		this._contextTshsOptimization = new SnapshotOptimization(
			s => s.hasContextTshs(),
			s => s.contextTshs,
			(s, v) => s.setContextTshs(v)
		);
		this._missingExistenceOptimization = new SnapshotOptimization(
			s => s.hasMissingExistence(),
			s => s.missingExistence,
			(s, v) => s.setMissingExistence(v),
			false
		);
		this._managedItemInfoOptimization = new SnapshotOptimization(
			s => s.hasManagedItemInfo(),
			s => s.managedItemInfo,
			(s, v) => s.setManagedItemInfo(v),
			false
		);
		this._managedFilesOptimization = new SnapshotOptimization(
			s => s.hasManagedFiles(),
			s => s.managedFiles,
			(s, v) => s.setManagedFiles(v),
			false,
			true
		);
		this._managedContextsOptimization = new SnapshotOptimization(
			s => s.hasManagedContexts(),
			s => s.managedContexts,
			(s, v) => s.setManagedContexts(v),
			false,
			true
		);
		this._managedMissingOptimization = new SnapshotOptimization(
			s => s.hasManagedMissing(),
			s => s.managedMissing,
			(s, v) => s.setManagedMissing(v),
			false,
			true
		);
		/** @type {StackedCacheMap<string, FileSystemInfoEntry | "ignore" | null>} */
		this._fileTimestamps = new StackedCacheMap();
		/** @type {Map<string, string | null>} */
		this._fileHashes = new Map();
		/** @type {Map<string, TimestampAndHash | string>} */
		this._fileTshs = new Map();
		/** @type {StackedCacheMap<string, ContextFileSystemInfoEntry | "ignore" | null>} */
		this._contextTimestamps = new StackedCacheMap();
		/** @type {Map<string, ContextHash>} */
		this._contextHashes = new Map();
		/** @type {Map<string, ContextTimestampAndHash>} */
		this._contextTshs = new Map();
		/** @type {Map<string, string>} */
		this._managedItems = new Map();
		/** @type {AsyncQueue<string, string, FileSystemInfoEntry>} */
		this.fileTimestampQueue = new AsyncQueue({
			name: "file timestamp",
			parallelism: 30,
			processor: this._readFileTimestamp.bind(this)
		});
		/** @type {AsyncQueue<string, string, string>} */
		this.fileHashQueue = new AsyncQueue({
			name: "file hash",
			parallelism: 10,
			processor: this._readFileHash.bind(this)
		});
		/** @type {AsyncQueue<string, string, ContextFileSystemInfoEntry>} */
		this.contextTimestampQueue = new AsyncQueue({
			name: "context timestamp",
			parallelism: 2,
			processor: this._readContextTimestamp.bind(this)
		});
		/** @type {AsyncQueue<string, string, ContextHash>} */
		this.contextHashQueue = new AsyncQueue({
			name: "context hash",
			parallelism: 2,
			processor: this._readContextHash.bind(this)
		});
		/** @type {AsyncQueue<string, string, ContextTimestampAndHash>} */
		this.contextTshQueue = new AsyncQueue({
			name: "context hash and timestamp",
			parallelism: 2,
			processor: this._readContextTimestampAndHash.bind(this)
		});
		/** @type {AsyncQueue<string, string, string>} */
		this.managedItemQueue = new AsyncQueue({
			name: "managed item info",
			parallelism: 10,
			processor: this._getManagedItemInfo.bind(this)
		});
		/** @type {AsyncQueue<string, string, Set<string>>} */
		this.managedItemDirectoryQueue = new AsyncQueue({
			name: "managed item directory info",
			parallelism: 10,
			processor: this._getManagedItemDirectoryInfo.bind(this)
		});
		const _unmanagedPaths = Array.from(unmanagedPaths);
		this.unmanagedPathsWithSlash = /** @type {string[]} */ (
			_unmanagedPaths.filter(p => typeof p === "string")
		).map(p => join(fs, p, "_").slice(0, -1));
		this.unmanagedPathsRegExps = /** @type {RegExp[]} */ (
			_unmanagedPaths.filter(p => typeof p !== "string")
		);

		this.managedPaths = Array.from(managedPaths);
		this.managedPathsWithSlash = /** @type {string[]} */ (
			this.managedPaths.filter(p => typeof p === "string")
		).map(p => join(fs, p, "_").slice(0, -1));

		this.managedPathsRegExps = /** @type {RegExp[]} */ (
			this.managedPaths.filter(p => typeof p !== "string")
		);
		this.immutablePaths = Array.from(immutablePaths);
		this.immutablePathsWithSlash = /** @type {string[]} */ (
			this.immutablePaths.filter(p => typeof p === "string")
		).map(p => join(fs, p, "_").slice(0, -1));
		this.immutablePathsRegExps = /** @type {RegExp[]} */ (
			this.immutablePaths.filter(p => typeof p !== "string")
		);

		this._cachedDeprecatedFileTimestamps = undefined;
		this._cachedDeprecatedContextTimestamps = undefined;

		this._warnAboutExperimentalEsmTracking = false;

		this._statCreatedSnapshots = 0;
		this._statTestedSnapshotsCached = 0;
		this._statTestedSnapshotsNotCached = 0;
		this._statTestedChildrenCached = 0;
		this._statTestedChildrenNotCached = 0;
		this._statTestedEntries = 0;
	}

	logStatistics() {
		const logger = /** @type {Logger} */ (this.logger);
		/**
		 * @param {string} header header
		 * @param {string | undefined} message message
		 */
		const logWhenMessage = (header, message) => {
			if (message) {
				logger.log(`${header}: ${message}`);
			}
		};
		logger.log(`${this._statCreatedSnapshots} new snapshots created`);
		logger.log(
			`${
				this._statTestedSnapshotsNotCached &&
				Math.round(
					(this._statTestedSnapshotsNotCached * 100) /
						(this._statTestedSnapshotsCached +
							this._statTestedSnapshotsNotCached)
				)
			}% root snapshot uncached (${this._statTestedSnapshotsNotCached} / ${
				this._statTestedSnapshotsCached + this._statTestedSnapshotsNotCached
			})`
		);
		logger.log(
			`${
				this._statTestedChildrenNotCached &&
				Math.round(
					(this._statTestedChildrenNotCached * 100) /
						(this._statTestedChildrenCached + this._statTestedChildrenNotCached)
				)
			}% children snapshot uncached (${this._statTestedChildrenNotCached} / ${
				this._statTestedChildrenCached + this._statTestedChildrenNotCached
			})`
		);
		logger.log(`${this._statTestedEntries} entries tested`);
		logger.log(
			`File info in cache: ${this._fileTimestamps.size} timestamps ${this._fileHashes.size} hashes ${this._fileTshs.size} timestamp hash combinations`
		);
		logWhenMessage(
			"File timestamp snapshot optimization",
			this._fileTimestampsOptimization.getStatisticMessage()
		);
		logWhenMessage(
			"File hash snapshot optimization",
			this._fileHashesOptimization.getStatisticMessage()
		);
		logWhenMessage(
			"File timestamp hash combination snapshot optimization",
			this._fileTshsOptimization.getStatisticMessage()
		);
		logger.log(
			`Directory info in cache: ${this._contextTimestamps.size} timestamps ${this._contextHashes.size} hashes ${this._contextTshs.size} timestamp hash combinations`
		);
		logWhenMessage(
			"Directory timestamp snapshot optimization",
			this._contextTimestampsOptimization.getStatisticMessage()
		);
		logWhenMessage(
			"Directory hash snapshot optimization",
			this._contextHashesOptimization.getStatisticMessage()
		);
		logWhenMessage(
			"Directory timestamp hash combination snapshot optimization",
			this._contextTshsOptimization.getStatisticMessage()
		);
		logWhenMessage(
			"Missing items snapshot optimization",
			this._missingExistenceOptimization.getStatisticMessage()
		);
		logger.log(`Managed items info in cache: ${this._managedItems.size} items`);
		logWhenMessage(
			"Managed items snapshot optimization",
			this._managedItemInfoOptimization.getStatisticMessage()
		);
		logWhenMessage(
			"Managed files snapshot optimization",
			this._managedFilesOptimization.getStatisticMessage()
		);
		logWhenMessage(
			"Managed contexts snapshot optimization",
			this._managedContextsOptimization.getStatisticMessage()
		);
		logWhenMessage(
			"Managed missing snapshot optimization",
			this._managedMissingOptimization.getStatisticMessage()
		);
	}

	/**
	 * @param {string} path path
	 * @param {string} reason reason
	 * @param {any[]} args arguments
	 */
	_log(path, reason, ...args) {
		const key = path + reason;
		const loggedPaths = /** @type {LoggedPaths} */ (this._loggedPaths);
		if (loggedPaths.has(key)) return;
		loggedPaths.add(key);
		/** @type {Logger} */
		(this.logger).debug(`${path} invalidated because ${reason}`, ...args);
		if (--this._remainingLogs === 0) {
			/** @type {Logger} */
			(this.logger).debug(
				"Logging limit has been reached and no further logging will be emitted by FileSystemInfo"
			);
		}
	}

	clear() {
		this._remainingLogs = this.logger ? 40 : 0;
		if (this._loggedPaths !== undefined) this._loggedPaths.clear();

		this._snapshotCache = new WeakMap();
		this._fileTimestampsOptimization.clear();
		this._fileHashesOptimization.clear();
		this._fileTshsOptimization.clear();
		this._contextTimestampsOptimization.clear();
		this._contextHashesOptimization.clear();
		this._contextTshsOptimization.clear();
		this._missingExistenceOptimization.clear();
		this._managedItemInfoOptimization.clear();
		this._managedFilesOptimization.clear();
		this._managedContextsOptimization.clear();
		this._managedMissingOptimization.clear();
		this._fileTimestamps.clear();
		this._fileHashes.clear();
		this._fileTshs.clear();
		this._contextTimestamps.clear();
		this._contextHashes.clear();
		this._contextTshs.clear();
		this._managedItems.clear();
		this._managedItems.clear();

		this._cachedDeprecatedFileTimestamps = undefined;
		this._cachedDeprecatedContextTimestamps = undefined;

		this._statCreatedSnapshots = 0;
		this._statTestedSnapshotsCached = 0;
		this._statTestedSnapshotsNotCached = 0;
		this._statTestedChildrenCached = 0;
		this._statTestedChildrenNotCached = 0;
		this._statTestedEntries = 0;
	}

	/**
	 * @param {ReadonlyMap<string, FileSystemInfoEntry | "ignore" | null>} map timestamps
	 * @param {boolean=} immutable if 'map' is immutable and FileSystemInfo can keep referencing it
	 * @returns {void}
	 */
	addFileTimestamps(map, immutable) {
		this._fileTimestamps.addAll(map, immutable);
		this._cachedDeprecatedFileTimestamps = undefined;
	}

	/**
	 * @param {ReadonlyMap<string, FileSystemInfoEntry | "ignore" | null>} map timestamps
	 * @param {boolean=} immutable if 'map' is immutable and FileSystemInfo can keep referencing it
	 * @returns {void}
	 */
	addContextTimestamps(map, immutable) {
		this._contextTimestamps.addAll(map, immutable);
		this._cachedDeprecatedContextTimestamps = undefined;
	}

	/**
	 * @param {string} path file path
	 * @param {function((WebpackError | null)=, (FileSystemInfoEntry | "ignore" | null)=): void} callback callback function
	 * @returns {void}
	 */
	getFileTimestamp(path, callback) {
		const cache = this._fileTimestamps.get(path);
		if (cache !== undefined) return callback(null, cache);
		this.fileTimestampQueue.add(path, callback);
	}

	/**
	 * @param {string} path context path
	 * @param {function((WebpackError | null)=, (ResolvedContextFileSystemInfoEntry | "ignore" | null)=): void} callback callback function
	 * @returns {void}
	 */
	getContextTimestamp(path, callback) {
		const cache = this._contextTimestamps.get(path);
		if (cache !== undefined) {
			if (cache === "ignore") return callback(null, "ignore");
			const resolved = getResolvedTimestamp(cache);
			if (resolved !== undefined) return callback(null, resolved);
			return this._resolveContextTimestamp(
				/** @type {ResolvedContextFileSystemInfoEntry} */
				(cache),
				callback
			);
		}
		this.contextTimestampQueue.add(path, (err, _entry) => {
			if (err) return callback(err);
			const entry = /** @type {ContextFileSystemInfoEntry} */ (_entry);
			const resolved = getResolvedTimestamp(entry);
			if (resolved !== undefined) return callback(null, resolved);
			this._resolveContextTimestamp(entry, callback);
		});
	}

	/**
	 * @param {string} path context path
	 * @param {function((WebpackError | null)=, (ContextFileSystemInfoEntry | "ignore" | null)=): void} callback callback function
	 * @returns {void}
	 */
	_getUnresolvedContextTimestamp(path, callback) {
		const cache = this._contextTimestamps.get(path);
		if (cache !== undefined) return callback(null, cache);
		this.contextTimestampQueue.add(path, callback);
	}

	/**
	 * @param {string} path file path
	 * @param {function((WebpackError | null)=, (string | null)=): void} callback callback function
	 * @returns {void}
	 */
	getFileHash(path, callback) {
		const cache = this._fileHashes.get(path);
		if (cache !== undefined) return callback(null, cache);
		this.fileHashQueue.add(path, callback);
	}

	/**
	 * @param {string} path context path
	 * @param {function((WebpackError | null)=, string=): void} callback callback function
	 * @returns {void}
	 */
	getContextHash(path, callback) {
		const cache = this._contextHashes.get(path);
		if (cache !== undefined) {
			const resolved = getResolvedHash(cache);
			if (resolved !== undefined)
				return callback(null, /** @type {string} */ (resolved));
			return this._resolveContextHash(cache, callback);
		}
		this.contextHashQueue.add(path, (err, _entry) => {
			if (err) return callback(err);
			const entry = /** @type {ContextHash} */ (_entry);
			const resolved = getResolvedHash(entry);
			if (resolved !== undefined)
				return callback(null, /** @type {string} */ (resolved));
			this._resolveContextHash(entry, callback);
		});
	}

	/**
	 * @param {string} path context path
	 * @param {function((WebpackError | null)=, (ContextHash | null)=): void} callback callback function
	 * @returns {void}
	 */
	_getUnresolvedContextHash(path, callback) {
		const cache = this._contextHashes.get(path);
		if (cache !== undefined) return callback(null, cache);
		this.contextHashQueue.add(path, callback);
	}

	/**
	 * @param {string} path context path
	 * @param {function((WebpackError | null)=, (ResolvedContextTimestampAndHash | null)=): void} callback callback function
	 * @returns {void}
	 */
	getContextTsh(path, callback) {
		const cache = this._contextTshs.get(path);
		if (cache !== undefined) {
			const resolved = getResolvedTimestamp(cache);
			if (resolved !== undefined) return callback(null, resolved);
			return this._resolveContextTsh(cache, callback);
		}
		this.contextTshQueue.add(path, (err, _entry) => {
			if (err) return callback(err);
			const entry = /** @type {ContextTimestampAndHash} */ (_entry);
			const resolved = getResolvedTimestamp(entry);
			if (resolved !== undefined) return callback(null, resolved);
			this._resolveContextTsh(entry, callback);
		});
	}

	/**
	 * @param {string} path context path
	 * @param {function((WebpackError | null)=, (ContextTimestampAndHash | null)=): void} callback callback function
	 * @returns {void}
	 */
	_getUnresolvedContextTsh(path, callback) {
		const cache = this._contextTshs.get(path);
		if (cache !== undefined) return callback(null, cache);
		this.contextTshQueue.add(path, callback);
	}

	_createBuildDependenciesResolvers() {
		const resolveContext = createResolver({
			resolveToContext: true,
			exportsFields: [],
			fileSystem: this.fs
		});
		const resolveCjs = createResolver({
			extensions: [".js", ".json", ".node"],
			conditionNames: ["require", "node"],
			exportsFields: ["exports"],
			fileSystem: this.fs
		});
		const resolveCjsAsChild = createResolver({
			extensions: [".js", ".json", ".node"],
			conditionNames: ["require", "node"],
			exportsFields: [],
			fileSystem: this.fs
		});
		const resolveEsm = createResolver({
			extensions: [".js", ".json", ".node"],
			fullySpecified: true,
			conditionNames: ["import", "node"],
			exportsFields: ["exports"],
			fileSystem: this.fs
		});
		return { resolveContext, resolveEsm, resolveCjs, resolveCjsAsChild };
	}

	/**
	 * @param {string} context context directory
	 * @param {Iterable<string>} deps dependencies
	 * @param {function((Error | null)=, ResolveBuildDependenciesResult=): void} callback callback function
	 * @returns {void}
	 */
	resolveBuildDependencies(context, deps, callback) {
		const { resolveContext, resolveEsm, resolveCjs, resolveCjsAsChild } =
			this._createBuildDependenciesResolvers();

		/** @type {Set<string>} */
		const files = new Set();
		/** @type {Set<string>} */
		const fileSymlinks = new Set();
		/** @type {Set<string>} */
		const directories = new Set();
		/** @type {Set<string>} */
		const directorySymlinks = new Set();
		/** @type {Set<string>} */
		const missing = new Set();
		/** @type {Set<string>} */
		const resolveFiles = new Set();
		/** @type {Set<string>} */
		const resolveDirectories = new Set();
		/** @type {Set<string>} */
		const resolveMissing = new Set();
		/** @type {Map<string, string | false | undefined>} */
		const resolveResults = new Map();
		const invalidResolveResults = new Set();
		const resolverContext = {
			fileDependencies: resolveFiles,
			contextDependencies: resolveDirectories,
			missingDependencies: resolveMissing
		};
		/**
		 * @param {undefined | boolean | string} expected expected result
		 * @returns {string} expected result
		 */
		const expectedToString = expected =>
			expected ? ` (expected ${expected})` : "";
		/** @typedef {{ type: JobType, context: string | undefined, path: string, issuer: Job | undefined, expected: undefined | boolean | string }} Job */

		/**
		 * @param {Job} job job
		 * @returns {`resolve commonjs file ${string}${string}`|`resolve esm file ${string}${string}`|`resolve esm ${string}${string}`|`resolve directory ${string}`|`file ${string}`|`unknown ${string} ${string}`|`resolve commonjs ${string}${string}`|`directory ${string}`|`file dependencies ${string}`|`directory dependencies ${string}`} result
		 */
		const jobToString = job => {
			switch (job.type) {
				case RBDT_RESOLVE_CJS:
					return `resolve commonjs ${job.path}${expectedToString(
						job.expected
					)}`;
				case RBDT_RESOLVE_ESM:
					return `resolve esm ${job.path}${expectedToString(job.expected)}`;
				case RBDT_RESOLVE_DIRECTORY:
					return `resolve directory ${job.path}`;
				case RBDT_RESOLVE_CJS_FILE:
					return `resolve commonjs file ${job.path}${expectedToString(
						job.expected
					)}`;
				case RBDT_RESOLVE_ESM_FILE:
					return `resolve esm file ${job.path}${expectedToString(
						job.expected
					)}`;
				case RBDT_DIRECTORY:
					return `directory ${job.path}`;
				case RBDT_FILE:
					return `file ${job.path}`;
				case RBDT_DIRECTORY_DEPENDENCIES:
					return `directory dependencies ${job.path}`;
				case RBDT_FILE_DEPENDENCIES:
					return `file dependencies ${job.path}`;
			}
			return `unknown ${job.type} ${job.path}`;
		};
		/**
		 * @param {Job} job job
		 * @returns {string} string value
		 */
		const pathToString = job => {
			let result = ` at ${jobToString(job)}`;
			/** @type {Job | undefined} */
			(job) = job.issuer;
			while (job !== undefined) {
				result += `\n at ${jobToString(job)}`;
				job = /** @type {Job} */ (job.issuer);
			}
			return result;
		};
		const logger = /** @type {Logger} */ (this.logger);
		processAsyncTree(
			Array.from(
				deps,
				dep =>
					/** @type {Job} */ ({
						type: RBDT_RESOLVE_CJS,
						context,
						path: dep,
						expected: undefined,
						issuer: undefined
					})
			),
			20,
			(job, push, callback) => {
				const { type, context, path, expected } = job;
				/**
				 * @param {string} path path
				 * @returns {void}
				 */
				const resolveDirectory = path => {
					const key = `d\n${context}\n${path}`;
					if (resolveResults.has(key)) {
						return callback();
					}
					resolveResults.set(key, undefined);
					resolveContext(
						/** @type {string} */ (context),
						path,