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Packs ECMAScript/CommonJs/AMD modules for the browser. Allows you to split your codebase into multiple bundles, which can be loaded on demand. Supports loaders to preprocess files, i.e. json, jsx, es7, css, less, ... and your custom stuff.
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/*
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("./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 */
const supportsEsm = +process.versions.modules >= 83;
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;
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=} 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 {object} ContextTimestampAndHash
* @property {number} safeTime
* @property {string=} timestampHash
* @property {string} hash
* @property {ResolvedContextTimestampAndHash=} resolved
* @property {Set=} symlinks
*/
/**
* @typedef {object} ContextHash
* @property {string} hash
* @property {string=} resolved
* @property {Set=} symlinks
*/
/**
* @typedef {object} SnapshotOptimizationEntry
* @property {Snapshot} snapshot
* @property {number} shared
* @property {Set | undefined} snapshotContent
* @property {Set | undefined} children
*/
/**
* @typedef {object} ResolveBuildDependenciesResult
* @property {Set} files list of files
* @property {Set} directories list of directories
* @property {Set} missing list of missing entries
* @property {Map} resolveResults stored resolve results
* @property {object} resolveDependencies dependencies of the resolving
* @property {Set} resolveDependencies.files list of files
* @property {Set} resolveDependencies.directories list of directories
* @property {Set} 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 {
constructor(next) {
this.next = next;
}
}
/** @typedef {(snapshot: Snapshot) => (Map | Set)[]} 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} */
let it;
/** @type {(snapshot: Snapshot) => (Map | Set)[]} */
let getMaps;
/** @type {(Map | Set)[]} */
let maps;
/** @type {Snapshot} */
let snapshot;
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 = queue.pop();
maps = getMaps(snapshot);
state = 1;
break;
} else {
state = 4;
}
}
/* falls through */
case 4:
return DONE_ITERATOR_RESULT;
}
}
});
}
}
/** @typedef {Map} FileTimestamps */
/** @typedef {Map} FileHashes */
/** @typedef {Map} FileTshs */
/** @typedef {Map} ContextTimestamps */
/** @typedef {Map} ContextHashes */
/** @typedef {Map} ContextTshs */
class Snapshot {
constructor() {
this._flags = 0;
/** @type {Iterable | undefined} */
this._cachedFileIterable = undefined;
/** @type {Iterable | undefined} */
this._cachedContextIterable = undefined;
/** @type {Iterable | 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 {Map | undefined} */
this.missingExistence = undefined;
/** @type {Map | undefined} */
this.managedItemInfo = undefined;
/** @type {Set | undefined} */
this.managedFiles = undefined;
/** @type {Set | undefined} */
this.managedContexts = undefined;
/** @type {Set | undefined} */
this.managedMissing = undefined;
/** @type {Set | 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;
}
setMergedStartTime(value, snapshot) {
if (value) {
if (snapshot.hasStartTime()) {
this.setStartTime(Math.min(value, snapshot.startTime));
} else {
this.setStartTime(value);
}
} else {
if (snapshot.hasStartTime()) this.setStartTime(snapshot.startTime);
}
}
hasFileTimestamps() {
return (this._flags & 2) !== 0;
}
setFileTimestamps(value) {
this._flags = this._flags | 2;
this.fileTimestamps = value;
}
hasFileHashes() {
return (this._flags & 4) !== 0;
}
setFileHashes(value) {
this._flags = this._flags | 4;
this.fileHashes = value;
}
hasFileTshs() {
return (this._flags & 8) !== 0;
}
setFileTshs(value) {
this._flags = this._flags | 8;
this.fileTshs = value;
}
hasContextTimestamps() {
return (this._flags & 0x10) !== 0;
}
setContextTimestamps(value) {
this._flags = this._flags | 0x10;
this.contextTimestamps = value;
}
hasContextHashes() {
return (this._flags & 0x20) !== 0;
}
setContextHashes(value) {
this._flags = this._flags | 0x20;
this.contextHashes = value;
}
hasContextTshs() {
return (this._flags & 0x40) !== 0;
}
setContextTshs(value) {
this._flags = this._flags | 0x40;
this.contextTshs = value;
}
hasMissingExistence() {
return (this._flags & 0x80) !== 0;
}
setMissingExistence(value) {
this._flags = this._flags | 0x80;
this.missingExistence = value;
}
hasManagedItemInfo() {
return (this._flags & 0x100) !== 0;
}
setManagedItemInfo(value) {
this._flags = this._flags | 0x100;
this.managedItemInfo = value;
}
hasManagedFiles() {
return (this._flags & 0x200) !== 0;
}
setManagedFiles(value) {
this._flags = this._flags | 0x200;
this.managedFiles = value;
}
hasManagedContexts() {
return (this._flags & 0x400) !== 0;
}
setManagedContexts(value) {
this._flags = this._flags | 0x400;
this.managedContexts = value;
}
hasManagedMissing() {
return (this._flags & 0x800) !== 0;
}
setManagedMissing(value) {
this._flags = this._flags | 0x800;
this.managedMissing = value;
}
hasChildren() {
return (this._flags & 0x1000) !== 0;
}
setChildren(value) {
this._flags = this._flags | 0x1000;
this.children = value;
}
addChild(child) {
if (!this.hasChildren()) {
this.setChildren(new Set());
}
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} iterable
*/
_createIterable(getMaps) {
return new SnapshotIterable(this, getMaps);
}
/**
* @returns {Iterable} iterable
*/
getFileIterable() {
if (this._cachedFileIterable === undefined) {
this._cachedFileIterable = this._createIterable(s => [
s.fileTimestamps,
s.fileHashes,
s.fileTshs,
s.managedFiles
]);
}
return this._cachedFileIterable;
}
/**
* @returns {Iterable} iterable
*/
getContextIterable() {
if (this._cachedContextIterable === undefined) {
this._cachedContextIterable = this._createIterable(s => [
s.contextTimestamps,
s.contextHashes,
s.contextTshs,
s.managedContexts
]);
}
return this._cachedContextIterable;
}
/**
* @returns {Iterable} 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 T
*/
class SnapshotOptimization {
/**
* @param {function(Snapshot): boolean} has has value
* @param {function(Snapshot): Map | Set} get get value
* @param {function(Snapshot, Map | Set): void} set set value
* @param {boolean=} useStartTime use the start time of snapshots
* @param {boolean=} isSet value is an Set instead of a Map
*/
constructor(has, get, set, useStartTime = true, isSet = false) {
this._has = has;
this._get = get;
this._set = set;
this._useStartTime = useStartTime;
this._isSet = isSet;
/** @type {Map} */
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 undefined;
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} capturedFiles files to snapshot/share
* @returns {void}
*/
optimize(newSnapshot, capturedFiles) {
/**
* @param {SnapshotOptimizationEntry} entry optimization entry
* @returns {void}
*/
const increaseSharedAndStoreOptimizationEntry = entry => {
if (entry.children !== undefined) {
entry.children.forEach(increaseSharedAndStoreOptimizationEntry);
}
entry.shared++;
storeOptimizationEntry(entry);
};
/**
* @param {SnapshotOptimizationEntry} entry optimization entry
* @returns {void}
*/
const storeOptimizationEntry = entry => {
for (const path of entry.snapshotContent) {
const old = this._map.get(path);
if (old.shared < entry.shared) {
this._map.set(path, entry);
}
capturedFiles.delete(path);
}
};
/** @type {SnapshotOptimizationEntry | undefined} */
let newOptimizationEntry = undefined;
const capturedFilesSize = capturedFiles.size;
/** @type {Set | 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);
}
}
optimizationEntries: 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 = optimizationEntry.snapshotContent;
const snapshotEntries = 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 optimizationEntries;
}
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 optimizationEntries;
}
// Extract common timestamps from both snapshots
let commonMap;
if (this._isSet) {
commonMap = new Set();
for (const path of /** @type {Set} */ (snapshotEntries)) {
if (nonSharedFiles.has(path)) continue;
commonMap.add(path);
snapshotEntries.delete(path);
}
} else {
commonMap = new Map();
const map = /** @type {Map} */ (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, 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 optimizationEntries;
}
let commonMap;
if (this._isSet) {
commonMap = new Set();
const set = /** @type {Set} */ (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} */ (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 optimizationEntries;
}
// Create and attach snapshot
const commonSnapshot = new Snapshot();
if (this._useStartTime) {
commonSnapshot.setMergedStartTime(newSnapshot.startTime, snapshot);
}
this._set(commonSnapshot, 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 {TODO} 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} a source map
* @param {Map} b joining map
* @returns {Map} joined map
*/
const mergeMaps = (a, b) => {
if (!b || b.size === 0) return a;
if (!a || a.size === 0) return b;
const map = new Map(a);
for (const [key, value] of b) {
map.set(key, value);
}
return map;
};
/**
* @template T
* @param {Set} a source map
* @param {Set} b joining map
* @returns {Set} joined map
*/
const mergeSets = (a, b) => {
if (!b || b.size === 0) return a;
if (!a || a.size === 0) return b;
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} source source
* @param {Set} target target
*/
const addAll = (source, target) => {
for (const key of source) target.add(key);
};
/**
* Used to access information about the filesystem in a cached way
*/
class FileSystemInfo {
/**
* @param {InputFileSystem} fs file system
* @param {object} options options
* @param {Iterable=} options.unmanagedPaths paths that are not managed by a package manager and the contents are subject to change
* @param {Iterable=} options.managedPaths paths that are only managed by a package manager
* @param {Iterable=} 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;
this._loggedPaths = logger ? new Set() : undefined;
this._hashFunction = hashFunction;
/** @type {WeakMap} */
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} */
this._fileTimestamps = new StackedCacheMap();
/** @type {Map} */
this._fileHashes = new Map();
/** @type {Map} */
this._fileTshs = new Map();
/** @type {StackedCacheMap} */
this._contextTimestamps = new StackedCacheMap();
/** @type {Map} */
this._contextHashes = new Map();
/** @type {Map} */
this._contextTshs = new Map();
/** @type {Map} */
this._managedItems = new Map();
/** @type {AsyncQueue} */
this.fileTimestampQueue = new AsyncQueue({
name: "file timestamp",
parallelism: 30,
processor: this._readFileTimestamp.bind(this)
});
/** @type {AsyncQueue} */
this.fileHashQueue = new AsyncQueue({
name: "file hash",
parallelism: 10,
processor: this._readFileHash.bind(this)
});
/** @type {AsyncQueue} */
this.contextTimestampQueue = new AsyncQueue({
name: "context timestamp",
parallelism: 2,
processor: this._readContextTimestamp.bind(this)
});
/** @type {AsyncQueue} */
this.contextHashQueue = new AsyncQueue({
name: "context hash",
parallelism: 2,
processor: this._readContextHash.bind(this)
});
/** @type {AsyncQueue} */
this.contextTshQueue = new AsyncQueue({
name: "context hash and timestamp",
parallelism: 2,
processor: this._readContextTimestampAndHash.bind(this)
});
/** @type {AsyncQueue} */
this.managedItemQueue = new AsyncQueue({
name: "managed item info",
parallelism: 10,
processor: this._getManagedItemInfo.bind(this)
});
/** @type {AsyncQueue>} */
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: ${this._managedItems.size} items`);
logWhenMessage(
`Managed items snapshot optimization`,
this._managedItemInfoOptimization.getStatisticMessage()
);
logWhenMessage(
`Managed files snapshot optimization`,
this._managedFilesOptimization.getStatisticMessage()
);
logWhenMessage(
`Managed contexts snapshot optimization`,
this._managedContextsOptimization.getStatisticMessage()
);
logWhenMessage(
`Managed missing snapshot optimization`,
this._managedMissingOptimization.getStatisticMessage()
);
}
/**
* @param {string} path path
* @param {string} reason reason
* @param {any[]} args arguments
*/
_log(path, reason, ...args) {
const key = path + reason;
if (this._loggedPaths.has(key)) return;
this._loggedPaths.add(key);
this.logger.debug(`${path} invalidated because ${reason}`, ...args);
if (--this._remainingLogs === 0) {
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} 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} 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(cache, callback);
}
this.contextTimestampQueue.add(path, (err, entry) => {
if (err) return callback(err);
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 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=): 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 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} 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} */
const files = new Set();
/** @type {Set} */
const fileSymlinks = new Set();
/** @type {Set} */
const directories = new Set();
/** @type {Set} */
const directorySymlinks = new Set();
/** @type {Set} */
const missing = new Set();
/** @type {Set} */
const resolveFiles = new Set();
/** @type {Set} */
const resolveDirectories = new Set();
/** @type {Set} */
const resolveMissing = new Set();
/** @type {Map} */
const resolveResults = new Map();
const invalidResolveResults = new Set();
const resolverContext = {
fileDependencies: resolveFiles,
contextDependencies: resolveDirectories,
missingDependencies: resolveMissing
};
/**
* @param {string} expected expected result
* @returns {string} expected result
*/
const expectedToString = expected => {
return expected ? ` (expected ${expected})` : "";
};
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}`;
};
const pathToString = job => {
let result = ` at ${jobToString(job)}`;
job = job.issuer;
while (job !== undefined) {
result += `\n at ${jobToString(job)}`;
job = job.issuer;
}
return result;
};
processAsyncTree(
Array.from(deps, dep => ({
type: RBDT_RESOLVE_CJS,
context,
path: dep,
expected: undefined,
issuer: undefined
})),
20,
(job, push, callback) => {
const { type, context, path, expected } = job;
const resolveDirectory = path => {
const key = `d\n${context}\n${path}`;
if (resolveResults.has(key)) {
return callback();
}
resolveResults.set(key, undefined);
resolveContext(context, path, resolverContext, (err, _, result) => {
if (err) {
if (expected === false) {
resolveResults.set(key, false);
return callback();
}
invalidResolveResults.add(key);
err.message += `\nwhile resolving '${path}' in ${context} to a directory`;
return callback(err);
}
const resultPath = result.path;
resolveResults.set(key, resultPath);
push({
type: RBDT_DIRECTORY,
context: undefined,
path: /** @type {string} */ (resultPath),
expected: undefined,
issuer: job
});
callback();
});
};
const resolveFile = (path, symbol, resolve) => {
const key = `${symbol}\n${context}\n${path}`;
if (resolveResults.has(key)) {
return callback();
}
resolveResults.set(key, undefined);
resolve(context, path, resolverContext, (err, _, result) => {
if (typeof expected === "string") {
if (!err && result && result.path === expected) {
resolveResults.set(key, result.path);
} else {
invalidResolveResults.add(key);
/** @type {Logger} */
(this.logger).warn(
`Resolving '${path}' in ${context} for build dependencies doesn't lead to expected result '${expected}', but to '${
err || (result && result.path)
}' instead. Resolving dependencies are ignored for this path.\n${pathToString(
job
)}`
);
}
} else {
if (err) {
if (expected === false) {
resolveResults.set(key, false);
return callback();
}
invalidResolveResults.add(key);
err.message += `\nwhile resolving '${path}' in ${context} as file\n${pathToString(
job
)}`;
return callback(err);
}
const resultPath = result.path;
resolveResults.set(key, resultPath);
push({
type: RBDT_FILE,
context: undefined,
path: resultPath,
expected: undefined,
issuer: job
});
}
callback();
});
};
switch (type) {
case RBDT_RESOLVE_CJS: {
const isDirectory = /[\\/]$/.test(path);
if (isDirectory) {
resolveDirectory(path.slice(0, path.length - 1));
} else {
resolveFile(path, "f", resolveCjs);
}
break;
}
case RBDT_RESOLVE_ESM: {
const isDirectory = /[\\/]$/.test(path);
if (isDirectory) {
resolveDirectory(path.slice(0, path.length - 1));
} else {
resolveFile(path);
}
break;
}
case RBDT_RESOLVE_DIRECTORY: {
resolveDirectory(path);
break;
}
case RBDT_RESOLVE_CJS_FILE: {
resolveFile(path, "f", resolveCjs);
break;
}
case RBDT_RESOLVE_CJS_FILE_AS_CHILD: {
resolveFile(path, "c", resolveCjsAsChild);
break;
}
case RBDT_RESOLVE_ESM_FILE: {
resolveFile(path, "e", resolveEsm);
break;
}
case RBDT_FILE: {
if (files.has(path)) {
callback();
break;
}
files.add(path);
this.fs.realpath(path, (err, _realPath) => {
if (err) return callback(err);
const realPath = /** @type {string} */ (_realPath);
if (realPath !== path) {
fileSymlinks.add(path);
resolveFiles.add(path);
if (files.has(realPath)) return callback();
files.add(realPath);
}
push({
type: RBDT_FILE_DEPENDENCIES,
context: undefined,
path: realPath,
expected: undefined,
issuer: job
});
callback();
});
break;
}
case RBDT_DIRECTORY: {
if (directories.has(path)) {
callback();
break;
}
directories.add(path);
this.fs.realpath(path, (err, _realPath) => {
if (err) return callback(err);
const realPath = /** @type {string} */ (_realPath);
if (realPath !== path) {
directorySymlinks.add(path);
resolveFiles.add(path);
if (directories.has(realPath)) return callback();
directories.add(realPath);
}
push({
type: RBDT_DIRECTORY_DEPENDENCIES,
context: undefined,
path: realPath,
expected: undefined,
issuer: job
});
callback();
});
break;
}
case RBDT_FILE_DEPENDENCIES: {
// Check for known files without dependencies
if (/\.json5?$|\.yarn-integrity$|yarn\.lock$|\.ya?ml/.test(path)) {
process.nextTick(callback);
break;
}
// Check commonjs cache for the module
/** @type {NodeModule | undefined} */
const module = require.cache[path];
if (module && Array.isArray(module.children)) {
children: for (const child of module.children) {
let childPath = child.filename;
if (childPath) {
push({
type: RBDT_FILE,
context: undefined,
path: childPath,
expected: undefined,
issuer: job
});
const context = dirname(this.fs, path);
for (const modulePath of module.paths) {
if (childPath.startsWith(modulePath)) {
let subPath = childPath.slice(modulePath.length + 1);
const packageMatch = /^(@[^\\/]+[\\/])[^\\/]+/.exec(
subPath
);
if (packageMatch) {
push({
type: RBDT_FILE,
context: undefined,
path:
modulePath +
childPath[modulePath.length] +
packageMatch[0] +
childPath[modulePath.length] +
"package.json",
expected: false,
issuer: job
});
}
let request = subPath.replace(/\\/g, "/");
if (request.endsWith(".js"))
request = request.slice(0, -3);
push({
type: RBDT_RESOLVE_CJS_FILE_AS_CHILD,
context,
path: request,
expected: child.filename,
issuer: job
});
continue children;
}
}
let request = relative(this.fs, context, childPath);
if (request.endsWith(".js")) request = request.slice(0, -3);
request = request.replace(/\\/g, "/");
if (!request.startsWith("../") && !isAbsolute(request)) {
request = `./${request}`;
}
push({
type: RBDT_RESOLVE_CJS_FILE,
context,
path: request,
expected: child.filename,
issuer: job
});
}
}
} else if (supportsEsm && /\.m?js$/.test(path)) {
if (!this._warnAboutExperimentalEsmTracking) {
this.logger.log(
"Node.js doesn't offer a (nice) way to introspect the ESM dependency graph yet.\n" +
"Until a full solution is available webpack uses an experimental ESM tracking based on parsing.\n" +
"As best effort webpack parses the ESM files to guess dependencies. But this can lead to expensive and incorrect tracking."
);
this._warnAboutExperimentalEsmTracking = true;
}
const lexer = require("es-module-lexer");
lexer.init.then(() => {
this.fs.readFile(path, (err, content) => {
if (err) return callback(err);
try {
const context = dirname(this.fs, path);
const source = content.toString();
const [imports] = lexer.parse(source);
for (const imp of imports) {
try {
let dependency;
if (imp.d === -1) {
// import ... from "..."
dependency = parseString(
source.substring(imp.s - 1, imp.e + 1)
);
} else if (imp.d > -1) {
// import()
let expr = source.substring(imp.s, imp.e).trim();
dependency = parseString(expr);
} else {
// e.g. import.meta
continue;
}
// we should not track Node.js build dependencies
if (dependency.startsWith("node:")) continue;
if (builtinModules.has(dependency)) continue;
push({
type: RBDT_RESOLVE_ESM_FILE,
context,
path: dependency,
expected: imp.d > -1 ? false : undefined,
issuer: job
});
} catch (e) {
this.logger.warn(
`Parsing of ${path} for build dependencies failed at 'import(${source.substring(
imp.s,
imp.e
)})'.\n` +
"Build dependencies behind this expression are ignored and might cause incorrect cache invalidation."
);
this.logger.debug(pathToString(job));
this.logger.debug(e.stack);
}
}
} catch (e) {
this.logger.warn(
`Parsing of ${path} for build dependencies failed and all dependencies of this file are ignored, which might cause incorrect cache invalidation..`
);
this.logger.debug(pathToString(job));
this.logger.debug(e.stack);
}
process.nextTick(callback);
});
}, callback);
break;
} else {
this.logger.log(
`Assuming ${path} has no dependencies as we were unable to assign it to any module system.`
);
this.logger.debug(pathToString(job));
}
process.nextTick(callback);
break;
}
case RBDT_DIRECTORY_DEPENDENCIES: {
const match =
/(^.+[\\/]node_modules[\\/](?:@[^\\/]+[\\/])?[^\\/]+)/.exec(path);
const packagePath = match ? match[1] : path;
const packageJson = join(this.fs, packagePath, "package.json");
this.fs.readFile(packageJson, (err, content) => {
if (err) {
if (err.code === "ENOENT") {
resolveMissing.add(packageJson);
const parent = dirname(this.fs, packagePath);
if (parent !== packagePath) {
push({
type: RBDT_DIRECTORY_DEPENDENCIES,
context: undefined,
path: parent,
expected: undefined,
issuer: job
});
}
callback();
return;
}
return callback(err);
}
resolveFiles.add(packageJson);
let packageData;
try {
packageData = JSON.parse(content.toString("utf-8"));
} catch (e) {
return callback(e);
}
const depsObject = packageData.dependencies;
const optionalDepsObject = packageData.optionalDependencies;
const allDeps = new Set();
const optionalDeps = new Set();
if (typeof depsObject === "object" && depsObject) {
for (const dep of Object.keys(depsObject)) {
allDeps.add(dep);
}
}
if (
typeof optionalDepsObject === "object" &&
optionalDepsObject
) {
for (const dep of Object.keys(optionalDepsObject)) {
allDeps.add(dep);
optionalDeps.add(dep);
}
}
for (const dep of allDeps) {
push({
type: RBDT_RESOLVE_DIRECTORY,
context: packagePath,
path: dep,
expected: !optionalDeps.has(dep),
issuer: job
});
}
callback();
});
break;
}
}
},
err => {
if (err) return callback(err);
for (const l of fileSymlinks) files.delete(l);
for (const l of directorySymlinks) directories.delete(l);
for (const k of invalidResolveResults) resolveResults.delete(k);
callback(null, {
files,
directories,
missing,
resolveResults,
resolveDependencies: {
files: resolveFiles,
directories: resolveDirectories,
missing: resolveMissing
}
});
}
);
}
/**
* @param {Map} resolveResults results from resolving
* @param {function((Error | null)=, boolean=): void} callback callback with true when resolveResults resolve the same way
* @returns {void}
*/
checkResolveResultsValid(resolveResults, callback) {
const { resolveCjs, resolveCjsAsChild, resolveEsm, resolveContext } =
this._createBuildDependenciesResolvers();
asyncLib.eachLimit(
resolveResults,
20,
([key, expectedResult], callback) => {
const [type, context, path] = key.split("\n");
switch (type) {
case "d":
resolveContext(context, path, {}, (err, _, result) => {
if (expectedResult === false)
return callback(err ? undefined : INVALID);
if (err) return callback(err);
const resultPath = result.path;
if (resultPath !== expectedResult) return callback(INVALID);
callback();
});
break;
case "f":
resolveCjs(context, path, {}, (err, _, result) => {
if (expectedResult === false)
return callback(err ? undefined : INVALID);
if (err) return callback(err);
const resultPath = result.path;
if (resultPath !== expectedResult) return callback(INVALID);
callback();
});
break;
case "c":
resolveCjsAsChild(context, path, {}, (err, _, result) => {
if (expectedResult === false)
return callback(err ? undefined : INVALID);
if (err) return callback(err);
const resultPath = result.path;
if (resultPath !== expectedResult) return callback(INVALID);
callback();
});
break;
case "e":
resolveEsm(context, path, {}, (err, _, result) => {
if (expectedResult === false)
return callback(err ? undefined : INVALID);
if (err) return callback(err);
const resultPath = result.path;
if (resultPath !== expectedResult) return callback(INVALID);
callback();
});
break;
default:
callback(new Error("Unexpected type in resolve result key"));
break;
}
},
/**
* @param {Error | typeof INVALID=} err error or invalid flag
* @returns {void}
*/
err => {
if (err === INVALID) {
return callback(null, false);
}
if (err) {
return callback(err);
}
return callback(null, true);
}
);
}
/**
*
* @param {number | null | undefined} startTime when processing the files has started
* @param {Iterable | null} files all files
* @param {Iterable | null} directories all directories
* @param {Iterable | null} missing all missing files or directories
* @param {SnapshotOptions | null | undefined} options options object (for future extensions)
* @param {function((WebpackError | null)=, (Snapshot | null)=): void} callback callback function
* @returns {void}
*/
createSnapshot(startTime, files, directories, missing, options, callback) {
/** @type {Map} */
const fileTimestamps = new Map();
/** @type {Map} */
const fileHashes = new Map();
/** @type {Map} */
const fileTshs = new Map();
/** @type {Map} */
const contextTimestamps = new Map();
/** @type {Map} */
const contextHashes = new Map();
/** @type {Map} */
const contextTshs = new Map();
/** @type {Map} */
const missingExistence = new Map();
/** @type {Map} */
const managedItemInfo = new Map();
/** @type {Set} */
const managedFiles = new Set();
/** @type {Set} */
const managedContexts = new Set();
/** @type {Set} */
const managedMissing = new Set();
/** @type {Set} */
const children = new Set();
const snapshot = new Snapshot();
if (startTime) snapshot.setStartTime(startTime);
/** @type {Set} */
const managedItems = new Set();
/** 1 = timestamp, 2 = hash, 3 = timestamp + hash */
const mode = options && options.hash ? (options.timestamp ? 3 : 2) : 1;
let jobs = 1;
const jobDone = () => {
if (--jobs === 0) {
if (fileTimestamps.size !== 0) {
snapshot.setFileTimestamps(fileTimestamps);
}
if (fileHashes.size !== 0) {
snapshot.setFileHashes(fileHashes);
}
if (fileTshs.size !== 0) {
snapshot.setFileTshs(fileTshs);
}
if (contextTimestamps.size !== 0) {
snapshot.setContextTimestamps(contextTimestamps);
}
if (contextHashes.size !== 0) {
snapshot.setContextHashes(contextHashes);
}
if (contextTshs.size !== 0) {
snapshot.setContextTshs(contextTshs);
}
if (missingExistence.size !== 0) {
snapshot.setMissingExistence(missingExistence);
}
if (managedItemInfo.size !== 0) {
snapshot.setManagedItemInfo(managedItemInfo);
}
this._managedFilesOptimization.optimize(snapshot, managedFiles);
if (managedFiles.size !== 0) {
snapshot.setManagedFiles(managedFiles);
}
this._managedContextsOptimization.optimize(snapshot, managedContexts);
if (managedContexts.size !== 0) {
snapshot.setManagedContexts(managedContexts);
}
this._managedMissingOptimization.optimize(snapshot, managedMissing);
if (managedMissing.size !== 0) {
snapshot.setManagedMissing(managedMissing);
}
if (children.size !== 0) {
snapshot.setChildren(children);
}
this._snapshotCache.set(snapshot, true);
this._statCreatedSnapshots++;
callback(null, snapshot);
}
};
const jobError = () => {
if (jobs > 0) {
// large negative number instead of NaN or something else to keep jobs to stay a SMI (v8)
jobs = -100000000;
callback(null, null);
}
};
const checkManaged = (path, managedSet) => {
for (const unmanagedPath of this.unmanagedPathsRegExps) {
if (unmanagedPath.test(path)) return false;
}
for (const unmanagedPath of this.unmanagedPathsWithSlash) {
if (path.startsWith(unmanagedPath)) return false;
}
for (const immutablePath of this.immutablePathsRegExps) {
if (immutablePath.test(path)) {
managedSet.add(path);
return true;
}
}
for (const immutablePath of this.immutablePathsWithSlash) {
if (path.startsWith(immutablePath)) {
managedSet.add(path);
return true;
}
}
for (const managedPath of this.managedPathsRegExps) {
const match = managedPath.exec(path);
if (match) {
const managedItem = getManagedItem(match[1], path);
if (managedItem) {
managedItems.add(managedItem);
managedSet.add(path);
return true;
}
}
}
for (const managedPath of this.managedPathsWithSlash) {
if (path.startsWith(managedPath)) {
const managedItem = getManagedItem(managedPath, path);
if (managedItem) {
managedItems.add(managedItem);
managedSet.add(path);
return true;
}
}
}
return false;
};
const captureNonManaged = (items, managedSet) => {
const capturedItems = new Set();
for (const path of items) {
if (!checkManaged(path, managedSet)) capturedItems.add(path);
}
return capturedItems;
};
/**
* @param {Set} capturedFiles captured files
*/
const processCapturedFiles = capturedFiles => {
switch (mode) {
case 3:
this._fileTshsOptimization.optimize(snapshot, capturedFiles);
for (const path of capturedFiles) {
const cache = this._fileTshs.get(path);
if (cache !== undefined) {
fileTshs.set(path, cache);
} else {
jobs++;
this._getFileTimestampAndHash(path, (err, entry) => {
if (err) {
if (this.logger) {
this.logger.debug(
`Error snapshotting file timestamp hash combination of ${path}: ${err.stack}`
);
}
jobError();
} else {
fileTshs.set(path, entry);
jobDone();
}
});
}
}
break;
case 2:
this._fileHashesOptimization.optimize(snapshot, capturedFiles);
for (const path of capturedFiles) {
const cache = this._fileHashes.get(path);
if (cache !== undefined) {
fileHashes.set(path, cache);
} else {
jobs++;
this.fileHashQueue.add(path, (err, entry) => {
if (err) {
if (this.logger) {
this.logger.debug(
`Error snapshotting file hash of ${path}: ${err.stack}`
);
}
jobError();
} else {
fileHashes.set(path, entry);
jobDone();
}
});
}
}
break;
case 1:
this._fileTimestampsOptimization.optimize(snapshot, capturedFiles);
for (const path of capturedFiles) {
const cache = this._fileTimestamps.get(path);
if (cache !== undefined) {
if (cache !== "ignore") {
fileTimestamps.set(path, cache);
}
} else {
jobs++;
this.fileTimestampQueue.add(path, (err, entry) => {
if (err) {
if (this.logger) {
this.logger.debug(
`Error snapshotting file timestamp of ${path}: ${err.stack}`
);
}
jobError();
} else {
fileTimestamps.set(path, entry);
jobDone();
}
});
}
}
break;
}
};
if (files) {
processCapturedFiles(captureNonManaged(files, managedFiles));
}
const processCapturedDirectories = capturedDirectories => {
switch (mode) {
case 3:
this._contextTshsOptimization.optimize(snapshot, capturedDirectories);
for (const path of capturedDirectories) {
const cache = this._contextTshs.get(path);
/** @type {ResolvedContextTimestampAndHash} */
let resolved;
if (
cache !== undefined &&
(resolved = getResolvedTimestamp(cache)) !== undefined
) {
contextTshs.set(path, resolved);
} else {
jobs++;
/**
* @param {Error=} err error
* @param {ResolvedContextTimestampAndHash=} entry entry
* @returns {void}
*/
const callback = (err, entry) => {
if (err) {
if (this.logger) {
this.logger.debug(
`Error snapshotting context timestamp hash combination of ${path}: ${err.stack}`
);
}
jobError();
} else {
contextTshs.set(path, entry);
jobDone();
}
};
if (cache !== undefined) {
this._resolveContextTsh(cache, callback);
} else {
this.getContextTsh(path, callback);
}
}
}
break;
case 2:
this._contextHashesOptimization.optimize(
snapshot,
capturedDirectories
);
for (const path of capturedDirectories) {
const cache = this._contextHashes.get(path);
let resolved;
if (
cache !== undefined &&
(resolved = getResolvedHash(cache)) !== undefined
) {
contextHashes.set(path, resolved);
} else {
jobs++;
const callback = (err, entry) => {
if (err) {
if (this.logger) {
this.logger.debug(
`Error snapshotting context hash of ${path}: ${err.stack}`
);
}
jobError();
} else {
contextHashes.set(path, entry);
jobDone();
}
};
if (cache !== undefined) {
this._resolveContextHash(cache, callback);
} else {
this.getContextHash(path, callback);
}
}
}
break;
case 1:
this._contextTimestampsOptimization.optimize(
snapshot,
capturedDirectories
);
for (const path of capturedDirectories) {
const cache = this._contextTimestamps.get(path);
if (cache === "ignore") continue;
let resolved;
if (
cache !== undefined &&
(resolved = getResolvedTimestamp(cache)) !== undefined
) {
contextTimestamps.set(path, resolved);
} else {
jobs++;
/**
* @param {Error=} err error
* @param {ResolvedContextFileSystemInfoEntry=} entry entry
* @returns {void}
*/
const callback = (err, entry) => {
if (err) {
if (this.logger) {
this.logger.debug(
`Error snapshotting context timestamp of ${path}: ${err.stack}`
);
}
jobError();
} else {
contextTimestamps.set(path, entry);
jobDone();
}
};
if (cache !== undefined) {
this._resolveContextTimestamp(cache, callback);
} else {
this.getContextTimestamp(path, callback);
}
}
}
break;
}
};
if (directories) {
processCapturedDirectories(
captureNonManaged(directories, managedContexts)
);
}
const processCapturedMissing = capturedMissing => {
this._missingExistenceOptimization.optimize(snapshot, capturedMissing);
for (const path of capturedMissing) {
const cache = this._fileTimestamps.get(path);
if (cache !== undefined) {
if (cache !== "ignore") {
missingExistence.set(path, Boolean(cache));
}
} else {
jobs++;
this.fileTimestampQueue.add(path, (err, entry) => {
if (err) {
if (this.logger) {
this.logger.debug(
`Error snapshotting missing timestamp of ${path}: ${err.stack}`
);
}
jobError();
} else {
missingExistence.set(path, Boolean(entry));
jobDone();
}
});
}
}
};
if (missing) {
processCapturedMissing(captureNonManaged(missing, managedMissing));
}
this._managedItemInfoOptimization.optimize(snapshot, managedItems);
for (const path of managedItems) {
const cache = this._managedItems.get(path);
if (cache !== undefined) {
if (!cache.startsWith("*")) {
managedFiles.add(join(this.fs, path, "package.json"));
} else if (cache === "*nested") {
managedMissing.add(join(this.fs, path, "package.json"));
}
managedItemInfo.set(path, cache);
} else {
jobs++;
this.managedItemQueue.add(path, (err, entry) => {
if (err) {
if (this.logger) {
this.logger.debug(
`Error snapshotting managed item ${path}: ${err.stack}`
);
}
jobError();
} else if (entry) {
if (!entry.startsWith("*")) {
managedFiles.add(join(this.fs, path, "package.json"));
} else if (cache === "*nested") {
managedMissing.add(join(this.fs, path, "package.json"));
}
managedItemInfo.set(path, entry);
jobDone();
} else {
// Fallback to normal snapshotting
const process = (set, fn) => {
if (set.size === 0) return;
const captured = new Set();
for (const file of set) {
if (file.startsWith(path)) captured.add(file);
}
if (captured.size > 0) fn(captured);
};
process(managedFiles, processCapturedFiles);
process(managedContexts, processCapturedDirectories);
process(managedMissing, processCapturedMissing);
jobDone();
}
});
}
}
jobDone();
}
/**
* @param {Snapshot} snapshot1 a snapshot
* @param {Snapshot} snapshot2 a snapshot
* @returns {Snapshot} merged snapshot
*/
mergeSnapshots(snapshot1, snapshot2) {
const snapshot = new Snapshot();
if (snapshot1.hasStartTime() && snapshot2.hasStartTime())
snapshot.setStartTime(Math.min(snapshot1.startTime, snapshot2.startTime));
else if (snapshot2.hasStartTime()) snapshot.startTime = snapshot2.startTime;
else if (snapshot1.hasStartTime()) snapshot.startTime = snapshot1.startTime;
if (snapshot1.hasFileTimestamps() || snapshot2.hasFileTimestamps()) {
snapshot.setFileTimestamps(
mergeMaps(snapshot1.fileTimestamps, snapshot2.fileTimestamps)
);
}
if (snapshot1.hasFileHashes() || snapshot2.hasFileHashes()) {
snapshot.setFileHashes(
mergeMaps(snapshot1.fileHashes, snapshot2.fileHashes)
);
}
if (snapshot1.hasFileTshs() || snapshot2.hasFileTshs()) {
snapshot.setFileTshs(mergeMaps(snapshot1.fileTshs, snapshot2.fileTshs));
}
if (snapshot1.hasContextTimestamps() || snapshot2.hasContextTimestamps()) {
snapshot.setContextTimestamps(
mergeMaps(snapshot1.contextTimestamps, snapshot2.contextTimestamps)
);
}
if (snapshot1.hasContextHashes() || snapshot2.hasContextHashes()) {
snapshot.setContextHashes(
mergeMaps(snapshot1.contextHashes, snapshot2.contextHashes)
);
}
if (snapshot1.hasContextTshs() || snapshot2.hasContextTshs()) {
snapshot.setContextTshs(
mergeMaps(snapshot1.contextTshs, snapshot2.contextTshs)
);
}
if (snapshot1.hasMissingExistence() || snapshot2.hasMissingExistence()) {
snapshot.setMissingExistence(
mergeMaps(snapshot1.missingExistence, snapshot2.missingExistence)
);
}
if (snapshot1.hasManagedItemInfo() || snapshot2.hasManagedItemInfo()) {
snapshot.setManagedItemInfo(
mergeMaps(snapshot1.managedItemInfo, snapshot2.managedItemInfo)
);
}
if (snapshot1.hasManagedFiles() || snapshot2.hasManagedFiles()) {
snapshot.setManagedFiles(
mergeSets(snapshot1.managedFiles, snapshot2.managedFiles)
);
}
if (snapshot1.hasManagedContexts() || snapshot2.hasManagedContexts()) {
snapshot.setManagedContexts(
mergeSets(snapshot1.managedContexts, snapshot2.managedContexts)
);
}
if (snapshot1.hasManagedMissing() || snapshot2.hasManagedMissing()) {
snapshot.setManagedMissing(
mergeSets(snapshot1.managedMissing, snapshot2.managedMissing)
);
}
if (snapshot1.hasChildren() || snapshot2.hasChildren()) {
snapshot.setChildren(mergeSets(snapshot1.children, snapshot2.children));
}
if (
this._snapshotCache.get(snapshot1) === true &&
this._snapshotCache.get(snapshot2) === true
) {
this._snapshotCache.set(snapshot, true);
}
return snapshot;
}
/**
* @param {Snapshot} snapshot the snapshot made
* @param {function((WebpackError | null)=, boolean=): void} callback callback function
* @returns {void}
*/
checkSnapshotValid(snapshot, callback) {
const cachedResult = this._snapshotCache.get(snapshot);
if (cachedResult !== undefined) {
this._statTestedSnapshotsCached++;
if (typeof cachedResult === "boolean") {
callback(null, cachedResult);
} else {
cachedResult.push(callback);
}
return;
}
this._statTestedSnapshotsNotCached++;
this._checkSnapshotValidNoCache(snapshot, callback);
}
/**
* @param {Snapshot} snapshot the snapshot made
* @param {function((WebpackError | null)=, boolean=): void} callback callback function
* @returns {void}
*/
_checkSnapshotValidNoCache(snapshot, callback) {
/** @type {number | undefined} */
let startTime = undefined;
if (snapshot.hasStartTime()) {
startTime = snapshot.startTime;
}
let jobs = 1;
const jobDone = () => {
if (--jobs === 0) {
this._snapshotCache.set(snapshot, true);
callback(null, true);
}
};
const invalid = () => {
if (jobs > 0) {
// large negative number instead of NaN or something else to keep jobs to stay a SMI (v8)
jobs = -100000000;
this._snapshotCache.set(snapshot, false);
callback(null, false);
}
};
const invalidWithError = (path, err) => {
if (this._remainingLogs > 0) {
this._log(path, `error occurred: %s`, err);
}
invalid();
};
/**
* @param {string} path file path
* @param {string} current current hash
* @param {string} snap snapshot hash
* @returns {boolean} true, if ok
*/
const checkHash = (path, current, snap) => {
if (current !== snap) {
// If hash differ it's invalid
if (this._remainingLogs > 0) {
this._log(path, `hashes differ (%s != %s)`, current, snap);
}
return false;
}
return true;
};
/**
* @param {string} path file path
* @param {boolean} current current entry
* @param {boolean} snap entry from snapshot
* @returns {boolean} true, if ok
*/
const checkExistence = (path, current, snap) => {
if (!current !== !snap) {
// If existence of item differs
// it's invalid
if (this._remainingLogs > 0) {
this._log(
path,
current ? "it didn't exist before" : "it does no longer exist"
);
}
return false;
}
return true;
};
/**
* @param {string} path file path
* @param {FileSystemInfoEntry} current current entry
* @param {FileSystemInfoEntry} snap entry from snapshot
* @param {boolean} log log reason
* @returns {boolean} true, if ok
*/
const checkFile = (path, current, snap, log = true) => {
if (current === snap) return true;
if (!checkExistence(path, Boolean(current), Boolean(snap))) return false;
if (current) {
// For existing items only
if (typeof startTime === "number" && current.safeTime > startTime) {
// If a change happened after starting reading the item
// this may no longer be valid
if (log && this._remainingLogs > 0) {
this._log(
path,
`it may have changed (%d) after the start time of the snapshot (%d)`,
current.safeTime,
startTime
);
}
return false;
}
if (
snap.timestamp !== undefined &&
current.timestamp !== snap.timestamp
) {
// If we have a timestamp (it was a file or symlink) and it differs from current timestamp
// it's invalid
if (log && this._remainingLogs > 0) {
this._log(
path,
`timestamps differ (%d != %d)`,
current.timestamp,
snap.timestamp
);
}
return false;
}
}
return true;
};
/**
* @param {string} path file path
* @param {ResolvedContextFileSystemInfoEntry} current current entry
* @param {ResolvedContextFileSystemInfoEntry} snap entry from snapshot
* @param {boolean} log log reason
* @returns {boolean} true, if ok
*/
const checkContext = (path, current, snap, log = true) => {
if (current === snap) return true;
if (!checkExistence(path, Boolean(current), Boolean(snap))) return false;
if (current) {
// For existing items only
if (typeof startTime === "number" && current.safeTime > startTime) {
// If a change happened after starting reading the item
// this may no longer be valid
if (log && this._remainingLogs > 0) {
this._log(
path,
`it may have changed (%d) after the start time of the snapshot (%d)`,
current.safeTime,
startTime
);
}
return false;
}
if (
snap.timestampHash !== undefined &&
current.timestampHash !== snap.timestampHash
) {
// If we have a timestampHash (it was a directory) and it differs from current timestampHash
// it's invalid
if (log && this._remainingLogs > 0) {
this._log(
path,
`timestamps hashes differ (%s != %s)`,
current.timestampHash,
snap.timestampHash
);
}
return false;
}
}
return true;
};
if (snapshot.hasChildren()) {
const childCallback = (err, result) => {
if (err || !result) return invalid();
else jobDone();
};
for (const child of snapshot.children) {
const cache = this._snapshotCache.get(child);
if (cache !== undefined) {
this._statTestedChildrenCached++;
/* istanbul ignore else */
if (typeof cache === "boolean") {
if (cache === false) {
invalid();
return;
}
} else {
jobs++;
cache.push(childCallback);
}
} else {
this._statTestedChildrenNotCached++;
jobs++;
this._checkSnapshotValidNoCache(child, childCallback);
}
}
}
if (snapshot.hasFileTimestamps()) {
const { fileTimestamps } = snapshot;
this._statTestedEntries += fileTimestamps.size;
for (const [path, ts] of fileTimestamps) {
const cache = this._fileTimestamps.get(path);
if (cache !== undefined) {
if (cache !== "ignore" && !checkFile(path, cache, ts)) {
invalid();
return;
}
} else {
jobs++;
this.fileTimestampQueue.add(path, (err, entry) => {
if (err) return invalidWithError(path, err);
if (!checkFile(path, entry, ts)) {
invalid();
} else {
jobDone();
}
});
}
}
}
/**
* @param {string} path file path
* @param {string} hash hash
*/
const processFileHashSnapshot = (path, hash) => {
const cache = this._fileHashes.get(path);
if (cache !== undefined) {
if (cache !== "ignore" && !checkHash(path, cache, hash)) {
invalid();
return;
}
} else {
jobs++;
this.fileHashQueue.add(path, (err, entry) => {
if (err) return invalidWithError(path, err);
if (!checkHash(path, entry, hash)) {
invalid();
} else {
jobDone();
}
});
}
};
if (snapshot.hasFileHashes()) {
const { fileHashes } = snapshot;
this._statTestedEntries += fileHashes.size;
for (const [path, hash] of fileHashes) {
processFileHashSnapshot(path, hash);
}
}
if (snapshot.hasFileTshs()) {
const { fileTshs } = snapshot;
this._statTestedEntries += fileTshs.size;
for (const [path, tsh] of fileTshs) {
if (typeof tsh === "string") {
processFileHashSnapshot(path, tsh);
} else {
const cache = this._fileTimestamps.get(path);
if (cache !== undefined) {
if (cache === "ignore" || !checkFile(path, cache, tsh, false)) {
processFileHashSnapshot(path, tsh && tsh.hash);
}
} else {
jobs++;
this.fileTimestampQueue.add(path, (err, entry) => {
if (err) return invalidWithError(path, err);
if (!checkFile(path, entry, tsh, false)) {
processFileHashSnapshot(path, tsh && tsh.hash);
}
jobDone();
});
}
}
}
}
if (snapshot.hasContextTimestamps()) {
const { contextTimestamps } = snapshot;
this._statTestedEntries += contextTimestamps.size;
for (const [path, ts] of contextTimestamps) {
const cache = this._contextTimestamps.get(path);
if (cache === "ignore") continue;
let resolved;
if (
cache !== undefined &&
(resolved = getResolvedTimestamp(cache)) !== undefined
) {
if (!checkContext(path, resolved, ts)) {
invalid();
return;
}
} else {
jobs++;
/**
* @param {Error=} err error
* @param {ResolvedContextFileSystemInfoEntry=} entry entry
* @returns {void}
*/
const callback = (err, entry) => {
if (err) return invalidWithError(path, err);
if (!checkContext(path, entry, ts)) {
invalid();
} else {
jobDone();
}
};
if (cache !== undefined) {
this._resolveContextTimestamp(cache, callback);
} else {
this.getContextTimestamp(path, callback);
}
}
}
}
const processContextHashSnapshot = (path, hash) => {
const cache = this._contextHashes.get(path);
let resolved;
if (
cache !== undefined &&
(resolved = getResolvedHash(cache)) !== undefined
) {
if (!checkHash(path, resolved, hash)) {
invalid();
return;
}
} else {
jobs++;
const callback = (err, entry) => {
if (err) return invalidWithError(path, err);
if (!checkHash(path, entry, hash)) {
invalid();
} else {
jobDone();
}
};
if (cache !== undefined) {
this._resolveContextHash(cache, callback);
} else {
this.getContextHash(path, callback);
}
}
};
if (snapshot.hasContextHashes()) {
const { contextHashes } = snapshot;
this._statTestedEntries += contextHashes.size;
for (const [path, hash] of contextHashes) {
processContextHashSnapshot(path, hash);
}
}
if (snapshot.hasContextTshs()) {
const { contextTshs } = snapshot;
this._statTestedEntries += contextTshs.size;
for (const [path, tsh] of contextTshs) {
if (typeof tsh === "string") {
processContextHashSnapshot(path, tsh);
} else {
const cache = this._contextTimestamps.get(path);
if (cache === "ignore") continue;
let resolved;
if (
cache !== undefined &&
(resolved = getResolvedTimestamp(cache)) !== undefined
) {
if (!checkContext(path, resolved, tsh, false)) {
processContextHashSnapshot(path, tsh && tsh.hash);
}
} else {
jobs++;
/**
* @param {Error=} err error
* @param {ResolvedContextFileSystemInfoEntry=} entry entry
* @returns {void}
*/
const callback = (err, entry) => {
if (err) return invalidWithError(path, err);
if (!checkContext(path, entry, tsh, false)) {
processContextHashSnapshot(path, tsh && tsh.hash);
}
jobDone();
};
if (cache !== undefined) {
this._resolveContextTimestamp(cache, callback);
} else {
this.getContextTimestamp(path, callback);
}
}
}
}
}
if (snapshot.hasMissingExistence()) {
const { missingExistence } = snapshot;
this._statTestedEntries += missingExistence.size;
for (const [path, existence] of missingExistence) {
const cache = this._fileTimestamps.get(path);
if (cache !== undefined) {
if (
cache !== "ignore" &&
!checkExistence(path, Boolean(cache), Boolean(existence))
) {
invalid();
return;
}
} else {
jobs++;
this.fileTimestampQueue.add(path, (err, entry) => {
if (err) return invalidWithError(path, err);
if (!checkExistence(path, Boolean(entry), Boolean(existence))) {
invalid();
} else {
jobDone();
}
});
}
}
}
if (snapshot.hasManagedItemInfo()) {
const { managedItemInfo } = snapshot;
this._statTestedEntries += managedItemInfo.size;
for (const [path, info] of managedItemInfo) {
const cache = this._managedItems.get(path);
if (cache !== undefined) {
if (!checkHash(path, cache, info)) {
invalid();
return;
}
} else {
jobs++;
this.managedItemQueue.add(path, (err, entry) => {
if (err) return invalidWithError(path, err);
if (!checkHash(path, entry, info)) {
invalid();
} else {
jobDone();
}
});
}
}
}
jobDone();
// if there was an async action
// try to join multiple concurrent request for this snapshot
if (jobs > 0) {
const callbacks = [callback];
callback = (err, result) => {
for (const callback of callbacks) callback(err, result);
};
this._snapshotCache.set(snapshot, callbacks);
}
}
_readFileTimestamp(path, callback) {
this.fs.stat(path, (err, stat) => {
if (err) {
if (err.code === "ENOENT") {
this._fileTimestamps.set(path, null);
this._cachedDeprecatedFileTimestamps = undefined;
return callback(null, null);
}
return callback(err);
}
let ts;
if (stat.isDirectory()) {
ts = {
safeTime: 0,
timestamp: undefined
};
} else {
const mtime = +stat.mtime;
if (mtime) applyMtime(mtime);
ts = {
safeTime: mtime ? mtime + FS_ACCURACY : Infinity,
timestamp: mtime
};
}
this._fileTimestamps.set(path, ts);
this._cachedDeprecatedFileTimestamps = undefined;
callback(null, ts);
});
}
_readFileHash(path, callback) {
this.fs.readFile(path, (err, content) => {
if (err) {
if (err.code === "EISDIR") {
this._fileHashes.set(path, "directory");
return callback(null, "directory");
}
if (err.code === "ENOENT") {
this._fileHashes.set(path, null);
return callback(null, null);
}
if (err.code === "ERR_FS_FILE_TOO_LARGE") {
this.logger.warn(`Ignoring ${path} for hashing as it's very large`);
this._fileHashes.set(path, "too large");
return callback(null, "too large");
}
return callback(err);
}
const hash = createHash(this._hashFunction);
hash.update(/** @type {string | Buffer} */ (content));
const digest = /** @type {string} */ (hash.digest("hex"));
this._fileHashes.set(path, digest);
callback(null, digest);
});
}
_getFileTimestampAndHash(path, callback) {
const continueWithHash = hash => {
const cache = this._fileTimestamps.get(path);
if (cache !== undefined) {
if (cache !== "ignore") {
const result = {
...cache,
hash
};
this._fileTshs.set(path, result);
return callback(null, result);
} else {
this._fileTshs.set(path, hash);
return callback(null, hash);
}
} else {
this.fileTimestampQueue.add(path, (err, entry) => {
if (err) {
return callback(err);
}
const result = {
...entry,
hash
};
this._fileTshs.set(path, result);
return callback(null, result);
});
}
};
const cache = this._fileHashes.get(path);
if (cache !== undefined) {
continueWithHash(cache);
} else {
this.fileHashQueue.add(path, (err, entry) => {
if (err) {
return callback(err);
}
continueWithHash(entry);
});
}
}
/**
* @template T
* @template ItemType
* @param {object} options options
* @param {string} options.path path
* @param {function(string): ItemType} options.fromImmutablePath called when context item is an immutable path
* @param {function(string): ItemType} options.fromManagedItem called when context item is a managed path
* @param {function(string, string, function(Error=, ItemType=): void): void} options.fromSymlink called when context item is a symlink
* @param {function(string, IStats, function(Error=, ItemType=): void): void} options.fromFile called when context item is a file
* @param {function(string, IStats, function(Error=, ItemType=): void): void} options.fromDirectory called when context item is a directory
* @param {function(string[], ItemType[]): T} options.reduce called from all context items
* @param {function((Error | null)=, (T | null)=): void} callback callback
*/
_readContext(
{
path,
fromImmutablePath,
fromManagedItem,
fromSymlink,
fromFile,
fromDirectory,
reduce
},
callback
) {
this.fs.readdir(path, (err, _files) => {
if (err) {
if (err.code === "ENOENT") {
return callback(null, null);
}
return callback(err);
}
const files = /** @type {string[]} */ (_files)
.map(file => file.normalize("NFC"))
.filter(file => !/^\./.test(file))
.sort();
asyncLib.map(
files,
(file, callback) => {
const child = join(this.fs, path, file);
for (const immutablePath of this.immutablePathsRegExps) {
if (immutablePath.test(path)) {
// ignore any immutable path for timestamping
return callback(null, fromImmutablePath(path));
}
}
for (const immutablePath of this.immutablePathsWithSlash) {
if (path.startsWith(immutablePath)) {
// ignore any immutable path for timestamping
return callback(null, fromImmutablePath(path));
}
}
for (const managedPath of this.managedPathsRegExps) {
const match = managedPath.exec(path);
if (match) {
const managedItem = getManagedItem(match[1], path);
if (managedItem) {
// construct timestampHash from managed info
return this.managedItemQueue.add(managedItem, (err, info) => {
if (err) return callback(err);
return callback(null, fromManagedItem(info));
});
}
}
}
for (const managedPath of this.managedPathsWithSlash) {
if (path.startsWith(managedPath)) {
const managedItem = getManagedItem(managedPath, child);
if (managedItem) {
// construct timestampHash from managed info
return this.managedItemQueue.add(managedItem, (err, info) => {
if (err) return callback(err);
return callback(null, fromManagedItem(info));
});
}
}
}
lstatReadlinkAbsolute(this.fs, child, (err, stat) => {
if (err) return callback(err);
if (typeof stat === "string") {
return fromSymlink(child, stat, callback);
}
if (stat.isFile()) {
return fromFile(child, stat, callback);
}
if (stat.isDirectory()) {
return fromDirectory(child, stat, callback);
}
callback(null, null);
});
},
(err, results) => {
if (err) return callback(err);
const result = reduce(files, results);
callback(null, result);
}
);
});
}
_readContextTimestamp(path, callback) {
this._readContext(
{
path,
fromImmutablePath: () => null,
fromManagedItem: info => ({
safeTime: 0,
timestampHash: info
}),
fromSymlink: (file, target, callback) => {
callback(null, {
timestampHash: target,
symlinks: new Set([target])
});
},
fromFile: (file, stat, callback) => {
// Prefer the cached value over our new stat to report consistent results
const cache = this._fileTimestamps.get(file);
if (cache !== undefined)
return callback(null, cache === "ignore" ? null : cache);
const mtime = +stat.mtime;
if (mtime) applyMtime(mtime);
const ts = {
safeTime: mtime ? mtime + FS_ACCURACY : Infinity,
timestamp: mtime
};
this._fileTimestamps.set(file, ts);
this._cachedDeprecatedFileTimestamps = undefined;
callback(null, ts);
},
fromDirectory: (directory, stat, callback) => {
this.contextTimestampQueue.increaseParallelism();
this._getUnresolvedContextTimestamp(directory, (err, tsEntry) => {
this.contextTimestampQueue.decreaseParallelism();
callback(err, tsEntry);
});
},
reduce: (files, tsEntries) => {
let symlinks = undefined;
const hash = createHash(this._hashFunction);
for (const file of files) hash.update(file);
let safeTime = 0;
for (const entry of tsEntries) {
if (!entry) {
hash.update("n");
continue;
}
if (entry.timestamp) {
hash.update("f");
hash.update(`${entry.timestamp}`);
} else if (entry.timestampHash) {
hash.update("d");
hash.update(`${entry.timestampHash}`);
}
if (entry.symlinks !== undefined) {
if (symlinks === undefined) symlinks = new Set();
addAll(entry.symlinks, symlinks);
}
if (entry.safeTime) {
safeTime = Math.max(safeTime, entry.safeTime);
}
}
const digest = /** @type {string} */ (hash.digest("hex"));
const result = {
safeTime,
timestampHash: digest
};
if (symlinks) result.symlinks = symlinks;
return result;
}
},
(err, result) => {
if (err) return callback(err);
this._contextTimestamps.set(path, result);
this._cachedDeprecatedContextTimestamps = undefined;
callback(null, result);
}
);
}
/**
* @param {ContextFileSystemInfoEntry} entry entry
* @param {function((Error | null)=, ResolvedContextFileSystemInfoEntry=): void} callback callback
* @returns {void}
*/
_resolveContextTimestamp(entry, callback) {
/** @type {string[]} */
const hashes = [];
let safeTime = 0;
processAsyncTree(
entry.symlinks,
10,
(target, push, callback) => {
this._getUnresolvedContextTimestamp(target, (err, entry) => {
if (err) return callback(err);
if (entry && entry !== "ignore") {
hashes.push(entry.timestampHash);
if (entry.safeTime) {
safeTime = Math.max(safeTime, entry.safeTime);
}
if (entry.symlinks !== undefined) {
for (const target of entry.symlinks) push(target);
}
}
callback();
});
},
err => {
if (err) return callback(err);
const hash = createHash(this._hashFunction);
hash.update(entry.timestampHash);
if (entry.safeTime) {
safeTime = Math.max(safeTime, entry.safeTime);
}
hashes.sort();
for (const h of hashes) {
hash.update(h);
}
callback(
null,
(entry.resolved = {
safeTime,
timestampHash: /** @type {string} */ (hash.digest("hex"))
})
);
}
);
}
_readContextHash(path, callback) {
this._readContext(
{
path,
fromImmutablePath: () => "",
fromManagedItem: info => info || "",
fromSymlink: (file, target, callback) => {
callback(null, {
hash: target,
symlinks: new Set([target])
});
},
fromFile: (file, stat, callback) =>
this.getFileHash(file, (err, hash) => {
callback(err, hash || "");
}),
fromDirectory: (directory, stat, callback) => {
this.contextHashQueue.increaseParallelism();
this._getUnresolvedContextHash(directory, (err, hash) => {
this.contextHashQueue.decreaseParallelism();
callback(err, hash || "");
});
},
/**
* @param {string[]} files files
* @param {(string | ContextHash)[]} fileHashes hashes
* @returns {ContextHash} reduced hash
*/
reduce: (files, fileHashes) => {
let symlinks = undefined;
const hash = createHash(this._hashFunction);
for (const file of files) hash.update(file);
for (const entry of fileHashes) {
if (typeof entry === "string") {
hash.update(entry);
} else {
hash.update(entry.hash);
if (entry.symlinks) {
if (symlinks === undefined) symlinks = new Set();
addAll(entry.symlinks, symlinks);
}
}
}
const result = {
hash: /** @type {string} */ (hash.digest("hex"))
};
if (symlinks) result.symlinks = symlinks;
return result;
}
},
(err, result) => {
if (err) return callback(err);
this._contextHashes.set(path, result);
return callback(null, result);
}
);
}
/**
* @param {ContextHash} entry context hash
* @param {function((WebpackError | null)=, string=): void} callback callback
* @returns {void}
*/
_resolveContextHash(entry, callback) {
/** @type {string[]} */
const hashes = [];
processAsyncTree(
entry.symlinks,
10,
(target, push, callback) => {
this._getUnresolvedContextHash(target, (err, hash) => {
if (err) return callback(err);
if (hash) {
hashes.push(hash.hash);
if (hash.symlinks !== undefined) {
for (const target of hash.symlinks) push(target);
}
}
callback();
});
},
err => {
if (err) return callback(/** @type {WebpackError} */ (err));
const hash = createHash(this._hashFunction);
hash.update(entry.hash);
hashes.sort();
for (const h of hashes) {
hash.update(h);
}
callback(
null,
(entry.resolved = /** @type {string} */ (hash.digest("hex")))
);
}
);
}
_readContextTimestampAndHash(path, callback) {
const finalize = (timestamp, hash) => {
const result =
timestamp === "ignore"
? hash
: {
...timestamp,
...hash
};
this._contextTshs.set(path, result);
callback(null, result);
};
const cachedHash = this._contextHashes.get(path);
const cachedTimestamp = this._contextTimestamps.get(path);
if (cachedHash !== undefined) {
if (cachedTimestamp !== undefined) {
finalize(cachedTimestamp, cachedHash);
} else {
this.contextTimestampQueue.add(path, (err, entry) => {
if (err) return callback(err);
finalize(entry, cachedHash);
});
}
} else {
if (cachedTimestamp !== undefined) {
this.contextHashQueue.add(path, (err, entry) => {
if (err) return callback(err);
finalize(cachedTimestamp, entry);
});
} else {
this._readContext(
{
path,
fromImmutablePath: () => null,
fromManagedItem: info => ({
safeTime: 0,
timestampHash: info,
hash: info || ""
}),
fromSymlink: (file, target, callback) => {
callback(null, {
timestampHash: target,
hash: target,
symlinks: new Set([target])
});
},
fromFile: (file, stat, callback) => {
this._getFileTimestampAndHash(file, callback);
},
fromDirectory: (directory, stat, callback) => {
this.contextTshQueue.increaseParallelism();
this.contextTshQueue.add(directory, (err, result) => {
this.contextTshQueue.decreaseParallelism();
callback(err, result);
});
},
/**
* @param {string[]} files files
* @param {(Partial & Partial | string | null)[]} results results
* @returns {ContextTimestampAndHash} tsh
*/
reduce: (files, results) => {
let symlinks = undefined;
const tsHash = createHash(this._hashFunction);
const hash = createHash(this._hashFunction);
for (const file of files) {
tsHash.update(file);
hash.update(file);
}
let safeTime = 0;
for (const entry of results) {
if (!entry) {
tsHash.update("n");
continue;
}
if (typeof entry === "string") {
tsHash.update("n");
hash.update(entry);
continue;
}
if (entry.timestamp) {
tsHash.update("f");
tsHash.update(`${entry.timestamp}`);
} else if (entry.timestampHash) {
tsHash.update("d");
tsHash.update(`${entry.timestampHash}`);
}
if (entry.symlinks !== undefined) {
if (symlinks === undefined) symlinks = new Set();
addAll(entry.symlinks, symlinks);
}
if (entry.safeTime) {
safeTime = Math.max(safeTime, entry.safeTime);
}
hash.update(entry.hash);
}
const result = {
safeTime,
timestampHash: /** @type {string} */ (tsHash.digest("hex")),
hash: /** @type {string} */ (hash.digest("hex"))
};
if (symlinks) result.symlinks = symlinks;
return result;
}
},
(err, result) => {
if (err) return callback(err);
this._contextTshs.set(path, result);
return callback(null, result);
}
);
}
}
}
/**
* @param {ContextTimestampAndHash} entry entry
* @param {function((Error | null)=, ResolvedContextTimestampAndHash=): void} callback callback
* @returns {void}
*/
_resolveContextTsh(entry, callback) {
/** @type {string[]} */
const hashes = [];
/** @type {string[]} */
const tsHashes = [];
let safeTime = 0;
processAsyncTree(
entry.symlinks,
10,
(target, push, callback) => {
this._getUnresolvedContextTsh(target, (err, entry) => {
if (err) return callback(err);
if (entry) {
hashes.push(entry.hash);
if (entry.timestampHash) tsHashes.push(entry.timestampHash);
if (entry.safeTime) {
safeTime = Math.max(safeTime, entry.safeTime);
}
if (entry.symlinks !== undefined) {
for (const target of entry.symlinks) push(target);
}
}
callback();
});
},
err => {
if (err) return callback(err);
const hash = createHash(this._hashFunction);
const tsHash = createHash(this._hashFunction);
hash.update(entry.hash);
if (entry.timestampHash) tsHash.update(entry.timestampHash);
if (entry.safeTime) {
safeTime = Math.max(safeTime, entry.safeTime);
}
hashes.sort();
for (const h of hashes) {
hash.update(h);
}
tsHashes.sort();
for (const h of tsHashes) {
tsHash.update(h);
}
callback(
null,
(entry.resolved = {
safeTime,
timestampHash: /** @type {string} */ (tsHash.digest("hex")),
hash: /** @type {string} */ (hash.digest("hex"))
})
);
}
);
}
_getManagedItemDirectoryInfo(path, callback) {
this.fs.readdir(path, (err, elements) => {
if (err) {
if (err.code === "ENOENT" || err.code === "ENOTDIR") {
return callback(null, EMPTY_SET);
}
return callback(err);
}
const set = new Set(
/** @type {string[]} */ (elements).map(element =>
join(this.fs, path, element)
)
);
callback(null, set);
});
}
_getManagedItemInfo(path, callback) {
const dir = dirname(this.fs, path);
this.managedItemDirectoryQueue.add(dir, (err, elements) => {
if (err) {
return callback(err);
}
if (!elements.has(path)) {
// file or directory doesn't exist
this._managedItems.set(path, "*missing");
return callback(null, "*missing");
}
// something exists
// it may be a file or directory
if (
path.endsWith("node_modules") &&
(path.endsWith("/node_modules") || path.endsWith("\\node_modules"))
) {
// we are only interested in existence of this special directory
this._managedItems.set(path, "*node_modules");
return callback(null, "*node_modules");
}
// we assume it's a directory, as files shouldn't occur in managed paths
const packageJsonPath = join(this.fs, path, "package.json");
this.fs.readFile(packageJsonPath, (err, content) => {
if (err) {
if (err.code === "ENOENT" || err.code === "ENOTDIR") {
// no package.json or path is not a directory
this.fs.readdir(path, (err, elements) => {
if (
!err &&
elements.length === 1 &&
elements[0] === "node_modules"
) {
// This is only a grouping folder e.g. used by yarn
// we are only interested in existence of this special directory
this._managedItems.set(path, "*nested");
return callback(null, "*nested");
}
this.logger.warn(
`Managed item ${path} isn't a directory or doesn't contain a package.json (see snapshot.managedPaths option)`
);
return callback();
});
return;
}
return callback(err);
}
let data;
try {
data = JSON.parse(/** @type {Buffer} */ (content).toString("utf-8"));
} catch (e) {
return callback(e);
}
if (!data.name) {
/** @type {Logger} */
(this.logger).warn(
`${packageJsonPath} doesn't contain a "name" property (see snapshot.managedPaths option)`
);
return callback();
}
const info = `${data.name || ""}@${data.version || ""}`;
this._managedItems.set(path, info);
callback(null, info);
});
});
}
getDeprecatedFileTimestamps() {
if (this._cachedDeprecatedFileTimestamps !== undefined)
return this._cachedDeprecatedFileTimestamps;
const map = new Map();
for (const [path, info] of this._fileTimestamps) {
if (info) map.set(path, typeof info === "object" ? info.safeTime : null);
}
return (this._cachedDeprecatedFileTimestamps = map);
}
getDeprecatedContextTimestamps() {
if (this._cachedDeprecatedContextTimestamps !== undefined)
return this._cachedDeprecatedContextTimestamps;
const map = new Map();
for (const [path, info] of this._contextTimestamps) {
if (info) map.set(path, typeof info === "object" ? info.safeTime : null);
}
return (this._cachedDeprecatedContextTimestamps = map);
}
}
module.exports = FileSystemInfo;
module.exports.Snapshot = Snapshot;