Press n or j to go to the next uncovered block, b, p or k for the previous block.
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2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 6x 6x 6x 3x 3x 6x 6x 6x 6x 6x 6x 6x 6x 807x 807x 807x 807x 807x 807x 807x 807x 807x 2x 45x 3x 3x 3x 1x 3x 1x 1x 1x 1x 1x 1x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 45x 45x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 45x 1x 1x 1x 1x 1x 1x 45x 3x 1x 1x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 1x 1x 1x 1x 1x 1x 45x 1x 45x 45x 45x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 45x 1x 1x 1x 1x 1x 45x 2x 2x 1x 1x 1x 1x 1x 1x 1x 1x 45x 45x 2x 2x 1x 1x 1x 1x 1x 1x 1x 45x 45x 45x 6x 6x 6x 6x 6x 6x 6x 5x 6x 3x 6x 6x 6x 6x 6x 6x 6x 6x 6x 6x 6x 18x 18x 18x 6x 6x 2x 6x 18x 18x 18x 18x 6x 15x 15x 5x 5x 5x 5x 15x 5x 5x 5x 5x 6x 4x 5x 1x 5x 5x 15x 25x 7x 15x 15x 15x 15x 13x 13x 15x 9x 14x 4x 6x 6x 6x 6x 6x 6x 6x 6x 6x 23x 6x 6x 6x 6x | import * as pathModule from 'path';
import { Node, Link, File } from './node';
import Stats from './Stats';
import Dirent from './Dirent';
import { Buffer, bufferAllocUnsafe, bufferFrom } from './internal/buffer';
import setImmediate from './setImmediate';
import queueMicrotask from './queueMicrotask';
import process from './process';
import setTimeoutUnref, { TSetTimeout } from './setTimeoutUnref';
import { Readable, Writable } from 'stream';
import { constants } from './constants';
import { EventEmitter } from 'events';
import { TEncodingExtended, TDataOut, strToEncoding, ENCODING_UTF8 } from './encoding';
import { FileHandle } from './node/FileHandle';
import * as util from 'util';
import * as misc from './node/types/misc';
import * as opts from './node/types/options';
import { FsCallbackApi, WritevCallback } from './node/types/FsCallbackApi';
import { FsPromises } from './node/FsPromises';
import { ToTreeOptions, toTreeSync } from './print';
import { ERRSTR, FLAGS, MODE } from './node/constants';
import {
getDefaultOpts,
getDefaultOptsAndCb,
getMkdirOptions,
getOptions,
getReadFileOptions,
getReaddirOptions,
getReaddirOptsAndCb,
getRmOptsAndCb,
getRmdirOptions,
optsAndCbGenerator,
getAppendFileOptsAndCb,
getAppendFileOpts,
getStatOptsAndCb,
getStatOptions,
getRealpathOptsAndCb,
getRealpathOptions,
getWriteFileOptions,
writeFileDefaults,
} from './node/options';
import {
validateCallback,
modeToNumber,
pathToFilename,
nullCheck,
createError,
genRndStr6,
flagsToNumber,
validateFd,
isFd,
isWin,
dataToBuffer,
getWriteArgs,
bufferToEncoding,
getWriteSyncArgs,
unixify,
} from './node/util';
import type { PathLike, symlink } from 'fs';
import type { FsPromisesApi, FsSynchronousApi } from './node/types';
import { fsSynchronousApiList } from './node/lists/fsSynchronousApiList';
const resolveCrossPlatform = pathModule.resolve;
const {
O_RDONLY,
O_WRONLY,
O_RDWR,
O_CREAT,
O_EXCL,
O_TRUNC,
O_APPEND,
O_DIRECTORY,
O_SYMLINK,
F_OK,
COPYFILE_EXCL,
COPYFILE_FICLONE_FORCE,
} = constants;
const { sep, relative, join, dirname } = pathModule.posix ? pathModule.posix : pathModule;
// ---------------------------------------- Types
// Node-style errors with a `code` property.
export interface IError extends Error {
code?: string;
}
export type TFileId = PathLike | number; // Number is used as a file descriptor.
export type TData = TDataOut | ArrayBufferView | DataView; // Data formats users can give us.
export type TFlags = string | number;
export type TMode = string | number; // Mode can be a String, although docs say it should be a Number.
export type TTime = number | string | Date;
export type TCallback<TData> = (error?: IError | null, data?: TData) => void;
// ---------------------------------------- Constants
const kMinPoolSpace = 128;
// ---------------------------------------- Error messages
const EPERM = 'EPERM';
const ENOENT = 'ENOENT';
const EBADF = 'EBADF';
const EINVAL = 'EINVAL';
const EEXIST = 'EEXIST';
const ENOTDIR = 'ENOTDIR';
const EMFILE = 'EMFILE';
const EACCES = 'EACCES';
const EISDIR = 'EISDIR';
const ENOTEMPTY = 'ENOTEMPTY';
const ENOSYS = 'ENOSYS';
const ERR_FS_EISDIR = 'ERR_FS_EISDIR';
const ERR_OUT_OF_RANGE = 'ERR_OUT_OF_RANGE';
// ---------------------------------------- Flags
export type TFlagsCopy =
| typeof constants.COPYFILE_EXCL
| typeof constants.COPYFILE_FICLONE
| typeof constants.COPYFILE_FICLONE_FORCE;
// ---------------------------------------- Options
// Options for `fs.appendFile` and `fs.appendFileSync`
export interface IAppendFileOptions extends opts.IFileOptions {}
// Options for `fs.watchFile`
export interface IWatchFileOptions {
persistent?: boolean;
interval?: number;
}
// Options for `fs.watch`
export interface IWatchOptions extends opts.IOptions {
persistent?: boolean;
recursive?: boolean;
}
// ---------------------------------------- Utility functions
type TResolve = (filename: string, base?: string) => string;
let resolve: TResolve = (filename, base = process.cwd()) => resolveCrossPlatform(base, filename);
Iif (isWin) {
const _resolve = resolve;
resolve = (filename, base) => unixify(_resolve(filename, base));
}
export function filenameToSteps(filename: string, base?: string): string[] {
const fullPath = resolve(filename, base);
const fullPathSansSlash = fullPath.substring(1);
if (!fullPathSansSlash) return [];
return fullPathSansSlash.split(sep);
}
export function pathToSteps(path: PathLike): string[] {
return filenameToSteps(pathToFilename(path));
}
export function dataToStr(data: TData, encoding: string = ENCODING_UTF8): string {
if (Buffer.isBuffer(data)) return data.toString(encoding);
else if (data instanceof Uint8Array) return bufferFrom(data).toString(encoding);
else return String(data);
}
// converts Date or number to a fractional UNIX timestamp
export function toUnixTimestamp(time) {
// tslint:disable-next-line triple-equals
Iif (typeof time === 'string' && +time == (time as any)) {
return +time;
}
if (time instanceof Date) {
return time.getTime() / 1000;
}
if (isFinite(time)) {
Iif (time < 0) {
return Date.now() / 1000;
}
return time;
}
throw new Error('Cannot parse time: ' + time);
}
function validateUid(uid: number) {
Iif (typeof uid !== 'number') throw TypeError(ERRSTR.UID);
}
function validateGid(gid: number) {
Iif (typeof gid !== 'number') throw TypeError(ERRSTR.GID);
}
// ---------------------------------------- Volume
type DirectoryContent = string | Buffer | null;
export interface DirectoryJSON<T extends DirectoryContent = DirectoryContent> {
[key: string]: T;
}
export interface NestedDirectoryJSON<T extends DirectoryContent = DirectoryContent> {
[key: string]: T | NestedDirectoryJSON;
}
function flattenJSON(nestedJSON: NestedDirectoryJSON): DirectoryJSON {
const flatJSON: DirectoryJSON = {};
function flatten(pathPrefix: string, node: NestedDirectoryJSON) {
for (const path in node) {
const contentOrNode = node[path];
const joinedPath = join(pathPrefix, path);
if (typeof contentOrNode === 'string' || contentOrNode instanceof Buffer) {
flatJSON[joinedPath] = contentOrNode;
} else if (typeof contentOrNode === 'object' && contentOrNode !== null && Object.keys(contentOrNode).length > 0) {
// empty directories need an explicit entry and therefore get handled in `else`, non-empty ones are implicitly considered
flatten(joinedPath, contentOrNode);
} else {
// without this branch null, empty-object or non-object entries would not be handled in the same way
// by both fromJSON() and fromNestedJSON()
flatJSON[joinedPath] = null;
}
}
}
flatten('', nestedJSON);
return flatJSON;
}
const notImplemented: (...args: any[]) => any = () => {
throw new Error('Not implemented');
};
/**
* `Volume` represents a file system.
*/
export class Volume implements FsCallbackApi, FsSynchronousApi {
static fromJSON(json: DirectoryJSON, cwd?: string): Volume {
const vol = new Volume();
vol.fromJSON(json, cwd);
return vol;
}
static fromNestedJSON(json: NestedDirectoryJSON, cwd?: string): Volume {
const vol = new Volume();
vol.fromNestedJSON(json, cwd);
return vol;
}
/**
* Global file descriptor counter. UNIX file descriptors start from 0 and go sequentially
* up, so here, in order not to conflict with them, we choose some big number and descrease
* the file descriptor of every new opened file.
* @type {number}
* @todo This should not be static, right?
*/
static fd: number = 0x7fffffff;
// Constructor function used to create new nodes.
// NodeClass: new (...args) => TNode = Node as new (...args) => TNode;
// Hard link to the root of this volume.
// root: Node = new (this.NodeClass)(null, '', true);
root: Link;
// I-node number counter.
ino: number = 0;
// A mapping for i-node numbers to i-nodes (`Node`);
inodes: { [ino: number]: Node } = {};
// List of released i-node numbers, for reuse.
releasedInos: number[] = [];
// A mapping for file descriptors to `File`s.
fds: { [fd: number]: File } = {};
// A list of reusable (opened and closed) file descriptors, that should be
// used first before creating a new file descriptor.
releasedFds: number[] = [];
// Max number of open files.
maxFiles = 10000;
// Current number of open files.
openFiles = 0;
StatWatcher: new () => StatWatcher;
ReadStream: new (...args) => misc.IReadStream;
WriteStream: new (...args) => IWriteStream;
FSWatcher: new () => FSWatcher;
props: {
Node: new (...args) => Node;
Link: new (...args) => Link;
File: new (...args) => File;
};
private promisesApi = new FsPromises(this, FileHandle);
get promises(): FsPromisesApi {
Iif (this.promisesApi === null) throw new Error('Promise is not supported in this environment.');
return this.promisesApi;
}
constructor(props = {}) {
this.props = Object.assign({ Node, Link, File }, props);
const root = this.createLink();
root.setNode(this.createNode(true));
const self = this; // tslint:disable-line no-this-assignment
this.StatWatcher = class extends StatWatcher {
constructor() {
super(self);
}
};
const _ReadStream: new (...args) => misc.IReadStream = FsReadStream as any;
this.ReadStream = class extends _ReadStream {
constructor(...args) {
super(self, ...args);
}
} as any as new (...args) => misc.IReadStream;
const _WriteStream: new (...args) => IWriteStream = FsWriteStream as any;
this.WriteStream = class extends _WriteStream {
constructor(...args) {
super(self, ...args);
}
} as any as new (...args) => IWriteStream;
this.FSWatcher = class extends FSWatcher {
constructor() {
super(self);
}
};
root.setChild('.', root);
root.getNode().nlink++;
root.setChild('..', root);
root.getNode().nlink++;
this.root = root;
}
createLink(): Link;
createLink(parent: Link, name: string, isDirectory?: boolean, perm?: number): Link;
createLink(parent?: Link, name?: string, isDirectory: boolean = false, perm?: number): Link {
if (!parent) {
return new this.props.Link(this, null, '');
}
Iif (!name) {
throw new Error('createLink: name cannot be empty');
}
return parent.createChild(name, this.createNode(isDirectory, perm));
}
deleteLink(link: Link): boolean {
const parent = link.parent;
if (parent) {
parent.deleteChild(link);
return true;
}
return false;
}
private newInoNumber(): number {
const releasedFd = this.releasedInos.pop();
if (releasedFd) return releasedFd;
else {
this.ino = (this.ino + 1) % 0xffffffff;
return this.ino;
}
}
private newFdNumber(): number {
const releasedFd = this.releasedFds.pop();
return typeof releasedFd === 'number' ? releasedFd : Volume.fd--;
}
createNode(isDirectory: boolean = false, perm?: number): Node {
const node = new this.props.Node(this.newInoNumber(), perm);
if (isDirectory) node.setIsDirectory();
this.inodes[node.ino] = node;
return node;
}
private deleteNode(node: Node) {
node.del();
delete this.inodes[node.ino];
this.releasedInos.push(node.ino);
}
// Returns a `Link` (hard link) referenced by path "split" into steps.
getLink(steps: string[]): Link | null {
return this.root.walk(steps);
}
// Just link `getLink`, but throws a correct user error, if link to found.
getLinkOrThrow(filename: string, funcName?: string): Link {
const steps = filenameToSteps(filename);
const link = this.getLink(steps);
if (!link) throw createError(ENOENT, funcName, filename);
return link;
}
// Just like `getLink`, but also dereference/resolves symbolic links.
getResolvedLink(filenameOrSteps: string | string[]): Link | null {
let steps: string[] = typeof filenameOrSteps === 'string' ? filenameToSteps(filenameOrSteps) : filenameOrSteps;
let link: Link | undefined = this.root;
let i = 0;
while (i < steps.length) {
const step = steps[i];
link = link.getChild(step);
if (!link) return null;
const node = link.getNode();
if (node.isSymlink()) {
steps = node.symlink.concat(steps.slice(i + 1));
link = this.root;
i = 0;
continue;
}
i++;
}
return link;
}
// Just like `getLinkOrThrow`, but also dereference/resolves symbolic links.
getResolvedLinkOrThrow(filename: string, funcName?: string): Link {
const link = this.getResolvedLink(filename);
if (!link) throw createError(ENOENT, funcName, filename);
return link;
}
resolveSymlinks(link: Link): Link | null {
// let node: Node = link.getNode();
// while(link && node.isSymlink()) {
// link = this.getLink(node.symlink);
// if(!link) return null;
// node = link.getNode();
// }
// return link;
return this.getResolvedLink(link.steps.slice(1));
}
// Just like `getLinkOrThrow`, but also verifies that the link is a directory.
private getLinkAsDirOrThrow(filename: string, funcName?: string): Link {
const link = this.getLinkOrThrow(filename, funcName);
Iif (!link.getNode().isDirectory()) throw createError(ENOTDIR, funcName, filename);
return link;
}
// Get the immediate parent directory of the link.
private getLinkParent(steps: string[]): Link | null {
return this.root.walk(steps, steps.length - 1);
}
private getLinkParentAsDirOrThrow(filenameOrSteps: string | string[], funcName?: string): Link {
const steps = filenameOrSteps instanceof Array ? filenameOrSteps : filenameToSteps(filenameOrSteps);
const link = this.getLinkParent(steps);
if (!link) throw createError(ENOENT, funcName, sep + steps.join(sep));
Iif (!link.getNode().isDirectory()) throw createError(ENOTDIR, funcName, sep + steps.join(sep));
return link;
}
private getFileByFd(fd: number): File {
return this.fds[String(fd)];
}
private getFileByFdOrThrow(fd: number, funcName?: string): File {
Iif (!isFd(fd)) throw TypeError(ERRSTR.FD);
const file = this.getFileByFd(fd);
if (!file) throw createError(EBADF, funcName);
return file;
}
/**
* @todo This is not used anymore. Remove.
*/
/*
private getNodeByIdOrCreate(id: TFileId, flags: number, perm: number): Node {
if (typeof id === 'number') {
const file = this.getFileByFd(id);
if (!file) throw Error('File nto found');
return file.node;
} else {
const steps = pathToSteps(id as PathLike);
let link = this.getLink(steps);
if (link) return link.getNode();
// Try creating a node if not found.
if (flags & O_CREAT) {
const dirLink = this.getLinkParent(steps);
if (dirLink) {
const name = steps[steps.length - 1];
link = this.createLink(dirLink, name, false, perm);
return link.getNode();
}
}
throw createError(ENOENT, 'getNodeByIdOrCreate', pathToFilename(id));
}
}
*/
private wrapAsync(method: (...args) => void, args: any[], callback: TCallback<any>) {
validateCallback(callback);
setImmediate(() => {
let result;
try {
result = method.apply(this, args);
} catch (err) {
callback(err);
return;
}
callback(null, result);
});
}
private _toJSON(link = this.root, json = {}, path?: string, asBuffer?: boolean): DirectoryJSON<string | null> {
let isEmpty = true;
let children = link.children;
if (link.getNode().isFile()) {
children = new Map([[link.getName(), link.parent.getChild(link.getName())]]);
link = link.parent;
}
for (const name of children.keys()) {
if (name === '.' || name === '..') {
continue;
}
isEmpty = false;
const child = link.getChild(name);
Iif (!child) {
throw new Error('_toJSON: unexpected undefined');
}
const node = child.getNode();
if (node.isFile()) {
let filename = child.getPath();
Iif (path) filename = relative(path, filename);
json[filename] = asBuffer ? node.getBuffer() : node.getString();
} else if (node.isDirectory()) {
this._toJSON(child, json, path, asBuffer);
}
}
let dirPath = link.getPath();
Iif (path) dirPath = relative(path, dirPath);
if (dirPath && isEmpty) {
json[dirPath] = null;
}
return json;
}
toJSON(paths?: PathLike | PathLike[], json = {}, isRelative = false, asBuffer = false): DirectoryJSON<string | null> {
const links: Link[] = [];
if (paths) {
if (!Array.isArray(paths)) paths = [paths];
for (const path of paths) {
const filename = pathToFilename(path);
const link = this.getResolvedLink(filename);
if (!link) continue;
links.push(link);
}
} else {
links.push(this.root);
}
if (!links.length) return json;
for (const link of links) this._toJSON(link, json, isRelative ? link.getPath() : '', asBuffer);
return json;
}
// TODO: `cwd` should probably not invoke `process.cwd()`.
fromJSON(json: DirectoryJSON, cwd: string = process.cwd()) {
for (let filename in json) {
const data = json[filename];
filename = resolve(filename, cwd);
if (typeof data === 'string' || data instanceof Buffer) {
const dir = dirname(filename);
this.mkdirpBase(dir, MODE.DIR);
this.writeFileSync(filename, data);
} else {
this.mkdirpBase(filename, MODE.DIR);
}
}
}
fromNestedJSON(json: NestedDirectoryJSON, cwd?: string) {
this.fromJSON(flattenJSON(json), cwd);
}
public toTree(opts: ToTreeOptions = { separator: <'/' | '\\'>sep }): string {
return toTreeSync(this, opts);
}
reset() {
this.ino = 0;
this.inodes = {};
this.releasedInos = [];
this.fds = {};
this.releasedFds = [];
this.openFiles = 0;
this.root = this.createLink();
this.root.setNode(this.createNode(true));
}
// Legacy interface
mountSync(mountpoint: string, json: DirectoryJSON) {
this.fromJSON(json, mountpoint);
}
private openLink(link: Link, flagsNum: number, resolveSymlinks: boolean = true): File {
Iif (this.openFiles >= this.maxFiles) {
// Too many open files.
throw createError(EMFILE, 'open', link.getPath());
}
// Resolve symlinks.
let realLink: Link | null = link;
if (resolveSymlinks) realLink = this.resolveSymlinks(link);
Iif (!realLink) throw createError(ENOENT, 'open', link.getPath());
const node = realLink.getNode();
// Check whether node is a directory
if (node.isDirectory()) {
if ((flagsNum & (O_RDONLY | O_RDWR | O_WRONLY)) !== O_RDONLY) throw createError(EISDIR, 'open', link.getPath());
} else {
Iif (flagsNum & O_DIRECTORY) throw createError(ENOTDIR, 'open', link.getPath());
}
// Check node permissions
if (!(flagsNum & O_WRONLY)) {
Iif (!node.canRead()) {
throw createError(EACCES, 'open', link.getPath());
}
}
if (flagsNum & O_RDWR) {
}
const file = new this.props.File(link, node, flagsNum, this.newFdNumber());
this.fds[file.fd] = file;
this.openFiles++;
if (flagsNum & O_TRUNC) file.truncate();
return file;
}
private openFile(
filename: string,
flagsNum: number,
modeNum: number | undefined,
resolveSymlinks: boolean = true,
): File {
const steps = filenameToSteps(filename);
let link: Link | null = resolveSymlinks ? this.getResolvedLink(steps) : this.getLink(steps);
if (link && flagsNum & O_EXCL) throw createError(EEXIST, 'open', filename);
// Try creating a new file, if it does not exist.
if (!link && flagsNum & O_CREAT) {
// const dirLink: Link = this.getLinkParent(steps);
const dirLink: Link | null = this.getResolvedLink(steps.slice(0, steps.length - 1));
// if(!dirLink) throw createError(ENOENT, 'open', filename);
if (!dirLink) throw createError(ENOENT, 'open', sep + steps.join(sep));
if (flagsNum & O_CREAT && typeof modeNum === 'number') {
link = this.createLink(dirLink, steps[steps.length - 1], false, modeNum);
}
}
if (link) return this.openLink(link, flagsNum, resolveSymlinks);
throw createError(ENOENT, 'open', filename);
}
private openBase(filename: string, flagsNum: number, modeNum: number, resolveSymlinks: boolean = true): number {
const file = this.openFile(filename, flagsNum, modeNum, resolveSymlinks);
Iif (!file) throw createError(ENOENT, 'open', filename);
return file.fd;
}
openSync(path: PathLike, flags: TFlags, mode: TMode = MODE.DEFAULT): number {
// Validate (1) mode; (2) path; (3) flags - in that order.
const modeNum = modeToNumber(mode);
const fileName = pathToFilename(path);
const flagsNum = flagsToNumber(flags);
return this.openBase(fileName, flagsNum, modeNum, !(flagsNum & O_SYMLINK));
}
open(path: PathLike, flags: TFlags, /* ... */ callback: TCallback<number>);
open(path: PathLike, flags: TFlags, mode: TMode, callback: TCallback<number>);
open(path: PathLike, flags: TFlags, a: TMode | TCallback<number>, b?: TCallback<number>) {
let mode: TMode = a as TMode;
let callback: TCallback<number> = b as TCallback<number>;
if (typeof a === 'function') {
mode = MODE.DEFAULT;
callback = a;
}
mode = mode || MODE.DEFAULT;
const modeNum = modeToNumber(mode);
const fileName = pathToFilename(path);
const flagsNum = flagsToNumber(flags);
this.wrapAsync(this.openBase, [fileName, flagsNum, modeNum, !(flagsNum & O_SYMLINK)], callback);
}
private closeFile(file: File) {
Iif (!this.fds[file.fd]) return;
this.openFiles--;
delete this.fds[file.fd];
this.releasedFds.push(file.fd);
}
closeSync(fd: number) {
validateFd(fd);
const file = this.getFileByFdOrThrow(fd, 'close');
this.closeFile(file);
}
close(fd: number, callback: TCallback<void>) {
validateFd(fd);
this.wrapAsync(this.closeSync, [fd], callback);
}
private openFileOrGetById(id: TFileId, flagsNum: number, modeNum?: number): File {
if (typeof id === 'number') {
const file = this.fds[id];
Iif (!file) throw createError(ENOENT);
return file;
} else {
return this.openFile(pathToFilename(id), flagsNum, modeNum);
}
}
private readBase(
fd: number,
buffer: Buffer | ArrayBufferView | DataView,
offset: number,
length: number,
position: number | null,
): number {
if (buffer.byteLength < length) {
throw createError(ERR_OUT_OF_RANGE, 'read', undefined, undefined, RangeError);
}
const file = this.getFileByFdOrThrow(fd);
if (file.node.isSymlink()) {
throw createError(EPERM, 'read', file.link.getPath());
}
return file.read(
buffer,
Number(offset),
Number(length),
position === -1 || typeof position !== 'number' ? undefined : position,
);
}
readSync(
fd: number,
buffer: Buffer | ArrayBufferView | DataView,
offset: number,
length: number,
position: number | null,
): number {
validateFd(fd);
return this.readBase(fd, buffer, offset, length, position);
}
read(
fd: number,
buffer: Buffer | ArrayBufferView | DataView,
offset: number,
length: number,
position: number | null,
callback: (err?: Error | null, bytesRead?: number, buffer?: Buffer | ArrayBufferView | DataView) => void,
) {
validateCallback(callback);
// This `if` branch is from Node.js
Iif (length === 0) {
return queueMicrotask(() => {
Iif (callback) callback(null, 0, buffer);
});
}
setImmediate(() => {
try {
const bytes = this.readBase(fd, buffer, offset, length, position);
callback(null, bytes, buffer);
} catch (err) {
callback(err);
}
});
}
private readvBase(fd: number, buffers: ArrayBufferView[], position: number | null): number {
const file = this.getFileByFdOrThrow(fd);
let p = position ?? undefined;
Iif (p === -1) {
p = undefined;
}
let bytesRead = 0;
for (const buffer of buffers) {
const bytes = file.read(buffer, 0, buffer.byteLength, p);
p = undefined;
bytesRead += bytes;
if (bytes < buffer.byteLength) break;
}
return bytesRead;
}
readv(fd: number, buffers: ArrayBufferView[], callback: misc.TCallback2<number, ArrayBufferView[]>): void;
readv(
fd: number,
buffers: ArrayBufferView[],
position: number | null,
callback: misc.TCallback2<number, ArrayBufferView[]>,
): void;
readv(
fd: number,
buffers: ArrayBufferView[],
a: number | null | misc.TCallback2<number, ArrayBufferView[]>,
b?: misc.TCallback2<number, ArrayBufferView[]>,
): void {
let position: number | null = a as number | null;
let callback: misc.TCallback2<number, ArrayBufferView[]> = b as misc.TCallback2<number, ArrayBufferView[]>;
if (typeof a === 'function') {
position = null;
callback = a;
}
validateCallback(callback);
setImmediate(() => {
try {
const bytes = this.readvBase(fd, buffers, position);
callback(null, bytes, buffers);
} catch (err) {
callback(err);
}
});
}
readvSync(fd: number, buffers: ArrayBufferView[], position: number | null): number {
validateFd(fd);
return this.readvBase(fd, buffers, position);
}
private readFileBase(id: TFileId, flagsNum: number, encoding: BufferEncoding): Buffer | string {
let result: Buffer | string;
const isUserFd = typeof id === 'number';
const userOwnsFd: boolean = isUserFd && isFd(id);
let fd: number;
if (userOwnsFd) fd = id as number;
else {
const filename = pathToFilename(id as PathLike);
const steps = filenameToSteps(filename);
const link: Link | null = this.getResolvedLink(steps);
if (link) {
const node = link.getNode();
if (node.isDirectory()) throw createError(EISDIR, 'open', link.getPath());
}
fd = this.openSync(id as PathLike, flagsNum);
}
try {
result = bufferToEncoding(this.getFileByFdOrThrow(fd).getBuffer(), encoding);
} finally {
if (!userOwnsFd) {
this.closeSync(fd);
}
}
return result;
}
readFileSync(file: TFileId, options?: opts.IReadFileOptions | string): TDataOut {
const opts = getReadFileOptions(options);
const flagsNum = flagsToNumber(opts.flag);
return this.readFileBase(file, flagsNum, opts.encoding as BufferEncoding);
}
readFile(id: TFileId, callback: TCallback<TDataOut>);
readFile(id: TFileId, options: opts.IReadFileOptions | string, callback: TCallback<TDataOut>);
readFile(id: TFileId, a: TCallback<TDataOut> | opts.IReadFileOptions | string, b?: TCallback<TDataOut>) {
const [opts, callback] = optsAndCbGenerator<opts.IReadFileOptions, TCallback<TDataOut>>(getReadFileOptions)(a, b);
const flagsNum = flagsToNumber(opts.flag);
this.wrapAsync(this.readFileBase, [id, flagsNum, opts.encoding], callback);
}
private writeBase(fd: number, buf: Buffer, offset?: number, length?: number, position?: number | null): number {
const file = this.getFileByFdOrThrow(fd, 'write');
if (file.node.isSymlink()) {
throw createError(EBADF, 'write', file.link.getPath());
}
return file.write(buf, offset, length, position === -1 || typeof position !== 'number' ? undefined : position);
}
writeSync(
fd: number,
buffer: Buffer | ArrayBufferView | DataView,
offset?: number,
length?: number,
position?: number,
): number;
writeSync(fd: number, str: string, position?: number, encoding?: BufferEncoding): number;
writeSync(
fd: number,
a: string | Buffer | ArrayBufferView | DataView,
b?: number,
c?: number | BufferEncoding,
d?: number,
): number {
const [, buf, offset, length, position] = getWriteSyncArgs(fd, a, b, c, d);
return this.writeBase(fd, buf, offset, length, position);
}
write(fd: number, buffer: Buffer | ArrayBufferView | DataView, callback: (...args) => void);
write(fd: number, buffer: Buffer | ArrayBufferView | DataView, offset: number, callback: (...args) => void);
write(
fd: number,
buffer: Buffer | ArrayBufferView | DataView,
offset: number,
length: number,
callback: (...args) => void,
);
write(
fd: number,
buffer: Buffer | ArrayBufferView | DataView,
offset: number,
length: number,
position: number,
callback: (...args) => void,
);
write(fd: number, str: string, callback: (...args) => void);
write(fd: number, str: string, position: number, callback: (...args) => void);
write(fd: number, str: string, position: number, encoding: BufferEncoding, callback: (...args) => void);
write(fd: number, a?, b?, c?, d?, e?) {
const [, asStr, buf, offset, length, position, cb] = getWriteArgs(fd, a, b, c, d, e);
setImmediate(() => {
try {
const bytes = this.writeBase(fd, buf, offset, length, position);
if (!asStr) {
cb(null, bytes, buf);
} else {
cb(null, bytes, a);
}
} catch (err) {
cb(err);
}
});
}
private writevBase(fd: number, buffers: ArrayBufferView[], position: number | null): number {
const file = this.getFileByFdOrThrow(fd);
let p = position ?? undefined;
Iif (p === -1) {
p = undefined;
}
let bytesWritten = 0;
for (const buffer of buffers) {
const nodeBuf = Buffer.from(buffer.buffer, buffer.byteOffset, buffer.byteLength);
const bytes = file.write(nodeBuf, 0, nodeBuf.byteLength, p);
p = undefined;
bytesWritten += bytes;
Iif (bytes < nodeBuf.byteLength) break;
}
return bytesWritten;
}
writev(fd: number, buffers: ArrayBufferView[], callback: WritevCallback): void;
writev(fd: number, buffers: ArrayBufferView[], position: number | null, callback: WritevCallback): void;
writev(fd: number, buffers: ArrayBufferView[], a: number | null | WritevCallback, b?: WritevCallback): void {
let position: number | null = a as number | null;
let callback: WritevCallback = b as WritevCallback;
Iif (typeof a === 'function') {
position = null;
callback = a;
}
validateCallback(callback);
setImmediate(() => {
try {
const bytes = this.writevBase(fd, buffers, position);
callback(null, bytes, buffers);
} catch (err) {
callback(err);
}
});
}
writevSync(fd: number, buffers: ArrayBufferView[], position: number | null): number {
validateFd(fd);
return this.writevBase(fd, buffers, position);
}
private writeFileBase(id: TFileId, buf: Buffer, flagsNum: number, modeNum: number) {
// console.log('writeFileBase', id, buf, flagsNum, modeNum);
// const node = this.getNodeByIdOrCreate(id, flagsNum, modeNum);
// node.setBuffer(buf);
const isUserFd = typeof id === 'number';
let fd: number;
if (isUserFd) fd = id as number;
else {
fd = this.openBase(pathToFilename(id as PathLike), flagsNum, modeNum);
// fd = this.openSync(id as PathLike, flagsNum, modeNum);
}
let offset = 0;
let length = buf.length;
let position = flagsNum & O_APPEND ? undefined : 0;
try {
while (length > 0) {
const written = this.writeSync(fd, buf, offset, length, position);
offset += written;
length -= written;
if (position !== undefined) position += written;
}
} finally {
if (!isUserFd) this.closeSync(fd);
}
}
writeFileSync(id: TFileId, data: TData, options?: opts.IWriteFileOptions): void {
const opts = getWriteFileOptions(options);
const flagsNum = flagsToNumber(opts.flag);
const modeNum = modeToNumber(opts.mode);
const buf = dataToBuffer(data, opts.encoding);
this.writeFileBase(id, buf, flagsNum, modeNum);
}
writeFile(id: TFileId, data: TData, callback: TCallback<void>);
writeFile(id: TFileId, data: TData, options: opts.IWriteFileOptions | string, callback: TCallback<void>);
writeFile(id: TFileId, data: TData, a: TCallback<void> | opts.IWriteFileOptions | string, b?: TCallback<void>) {
let options: opts.IWriteFileOptions | string = a as opts.IWriteFileOptions;
let callback: TCallback<void> | undefined = b;
if (typeof a === 'function') {
options = writeFileDefaults;
callback = a;
}
const cb = validateCallback(callback);
const opts = getWriteFileOptions(options);
const flagsNum = flagsToNumber(opts.flag);
const modeNum = modeToNumber(opts.mode);
const buf = dataToBuffer(data, opts.encoding);
this.wrapAsync(this.writeFileBase, [id, buf, flagsNum, modeNum], cb);
}
private linkBase(filename1: string, filename2: string) {
const steps1 = filenameToSteps(filename1);
const link1 = this.getLink(steps1);
if (!link1) throw createError(ENOENT, 'link', filename1, filename2);
const steps2 = filenameToSteps(filename2);
// Check new link directory exists.
const dir2 = this.getLinkParent(steps2);
Iif (!dir2) throw createError(ENOENT, 'link', filename1, filename2);
const name = steps2[steps2.length - 1];
// Check if new file already exists.
Iif (dir2.getChild(name)) throw createError(EEXIST, 'link', filename1, filename2);
const node = link1.getNode();
node.nlink++;
dir2.createChild(name, node);
}
private copyFileBase(src: string, dest: string, flags: number) {
const buf = this.readFileSync(src) as Buffer;
if (flags & COPYFILE_EXCL) {
if (this.existsSync(dest)) {
throw createError(EEXIST, 'copyFile', src, dest);
}
}
if (flags & COPYFILE_FICLONE_FORCE) {
throw createError(ENOSYS, 'copyFile', src, dest);
}
this.writeFileBase(dest, buf, FLAGS.w, MODE.DEFAULT);
}
copyFileSync(src: PathLike, dest: PathLike, flags?: TFlagsCopy) {
const srcFilename = pathToFilename(src);
const destFilename = pathToFilename(dest);
return this.copyFileBase(srcFilename, destFilename, (flags || 0) | 0);
}
copyFile(src: PathLike, dest: PathLike, callback: TCallback<void>);
copyFile(src: PathLike, dest: PathLike, flags: TFlagsCopy, callback: TCallback<void>);
copyFile(src: PathLike, dest: PathLike, a, b?) {
const srcFilename = pathToFilename(src);
const destFilename = pathToFilename(dest);
let flags: TFlagsCopy;
let callback: TCallback<void>;
if (typeof a === 'function') {
flags = 0;
callback = a;
} else {
flags = a;
callback = b;
}
validateCallback(callback);
this.wrapAsync(this.copyFileBase, [srcFilename, destFilename, flags], callback);
}
linkSync(existingPath: PathLike, newPath: PathLike) {
const existingPathFilename = pathToFilename(existingPath);
const newPathFilename = pathToFilename(newPath);
this.linkBase(existingPathFilename, newPathFilename);
}
link(existingPath: PathLike, newPath: PathLike, callback: TCallback<void>) {
const existingPathFilename = pathToFilename(existingPath);
const newPathFilename = pathToFilename(newPath);
this.wrapAsync(this.linkBase, [existingPathFilename, newPathFilename], callback);
}
private unlinkBase(filename: string) {
const steps = filenameToSteps(filename);
const link = this.getLink(steps);
if (!link) throw createError(ENOENT, 'unlink', filename);
// TODO: Check if it is file, dir, other...
Iif (link.length) throw Error('Dir not empty...');
this.deleteLink(link);
const node = link.getNode();
node.nlink--;
// When all hard links to i-node are deleted, remove the i-node, too.
if (node.nlink <= 0) {
this.deleteNode(node);
}
}
unlinkSync(path: PathLike) {
const filename = pathToFilename(path);
this.unlinkBase(filename);
}
unlink(path: PathLike, callback: TCallback<void>) {
const filename = pathToFilename(path);
this.wrapAsync(this.unlinkBase, [filename], callback);
}
private symlinkBase(targetFilename: string, pathFilename: string): Link {
const pathSteps = filenameToSteps(pathFilename);
// Check if directory exists, where we about to create a symlink.
const dirLink = this.getLinkParent(pathSteps);
Iif (!dirLink) throw createError(ENOENT, 'symlink', targetFilename, pathFilename);
const name = pathSteps[pathSteps.length - 1];
// Check if new file already exists.
if (dirLink.getChild(name)) throw createError(EEXIST, 'symlink', targetFilename, pathFilename);
// Create symlink.
const symlink: Link = dirLink.createChild(name);
symlink.getNode().makeSymlink(filenameToSteps(targetFilename));
return symlink;
}
// `type` argument works only on Windows.
symlinkSync(target: PathLike, path: PathLike, type?: symlink.Type) {
const targetFilename = pathToFilename(target);
const pathFilename = pathToFilename(path);
this.symlinkBase(targetFilename, pathFilename);
}
symlink(target: PathLike, path: PathLike, callback: TCallback<void>);
symlink(target: PathLike, path: PathLike, type: symlink.Type, callback: TCallback<void>);
symlink(target: PathLike, path: PathLike, a: symlink.Type | TCallback<void>, b?: TCallback<void>) {
const callback: TCallback<void> = validateCallback(typeof a === 'function' ? a : b);
const targetFilename = pathToFilename(target);
const pathFilename = pathToFilename(path);
this.wrapAsync(this.symlinkBase, [targetFilename, pathFilename], callback);
}
private realpathBase(filename: string, encoding: TEncodingExtended | undefined): TDataOut {
const steps = filenameToSteps(filename);
const realLink = this.getResolvedLink(steps);
if (!realLink) throw createError(ENOENT, 'realpath', filename);
return strToEncoding(realLink.getPath() || '/', encoding);
}
realpathSync(path: PathLike, options?: opts.IRealpathOptions | string): TDataOut {
return this.realpathBase(pathToFilename(path), getRealpathOptions(options).encoding);
}
realpath(path: PathLike, callback: TCallback<TDataOut>);
realpath(path: PathLike, options: opts.IRealpathOptions | string, callback: TCallback<TDataOut>);
realpath(path: PathLike, a: TCallback<TDataOut> | opts.IRealpathOptions | string, b?: TCallback<TDataOut>) {
const [opts, callback] = getRealpathOptsAndCb(a, b);
const pathFilename = pathToFilename(path);
this.wrapAsync(this.realpathBase, [pathFilename, opts.encoding], callback);
}
private lstatBase(filename: string, bigint: false, throwIfNoEntry: true): Stats<number>;
private lstatBase(filename: string, bigint: true, throwIfNoEntry: true): Stats<bigint>;
private lstatBase(filename: string, bigint: true, throwIfNoEntry: false): Stats<bigint> | undefined;
private lstatBase(filename: string, bigint: false, throwIfNoEntry: false): Stats<number> | undefined;
private lstatBase(filename: string, bigint = false, throwIfNoEntry = false): Stats | undefined {
const link = this.getLink(filenameToSteps(filename));
if (link) {
return Stats.build(link.getNode(), bigint);
} else if (!throwIfNoEntry) {
return undefined;
} else {
throw createError(ENOENT, 'lstat', filename);
}
}
lstatSync(path: PathLike): Stats<number>;
lstatSync(path: PathLike, options: { throwIfNoEntry?: true | undefined }): Stats<number>;
lstatSync(path: PathLike, options: { bigint: false; throwIfNoEntry?: true | undefined }): Stats<number>;
lstatSync(path: PathLike, options: { bigint: true; throwIfNoEntry?: true | undefined }): Stats<bigint>;
lstatSync(path: PathLike, options: { throwIfNoEntry: false }): Stats<number> | undefined;
lstatSync(path: PathLike, options: { bigint: false; throwIfNoEntry: false }): Stats<number> | undefined;
lstatSync(path: PathLike, options: { bigint: true; throwIfNoEntry: false }): Stats<bigint> | undefined;
lstatSync(path: PathLike, options?: opts.IStatOptions): Stats | undefined {
const { throwIfNoEntry = true, bigint = false } = getStatOptions(options);
return this.lstatBase(pathToFilename(path), bigint as any, throwIfNoEntry as any);
}
lstat(path: PathLike, callback: TCallback<Stats>): void;
lstat(path: PathLike, options: opts.IStatOptions, callback: TCallback<Stats>): void;
lstat(path: PathLike, a: TCallback<Stats> | opts.IStatOptions, b?: TCallback<Stats>): void {
const [{ throwIfNoEntry = true, bigint = false }, callback] = getStatOptsAndCb(a, b);
this.wrapAsync(this.lstatBase, [pathToFilename(path), bigint, throwIfNoEntry], callback);
}
private statBase(filename: string): Stats<number>;
private statBase(filename: string, bigint: false, throwIfNoEntry: true): Stats<number>;
private statBase(filename: string, bigint: true, throwIfNoEntry: true): Stats<bigint>;
private statBase(filename: string, bigint: true, throwIfNoEntry: false): Stats<bigint> | undefined;
private statBase(filename: string, bigint: false, throwIfNoEntry: false): Stats<number> | undefined;
private statBase(filename: string, bigint = false, throwIfNoEntry = true): Stats | undefined {
const link = this.getResolvedLink(filenameToSteps(filename));
if (link) {
return Stats.build(link.getNode(), bigint);
} else if (!throwIfNoEntry) {
return undefined;
} else {
throw createError(ENOENT, 'stat', filename);
}
}
statSync(path: PathLike): Stats<number>;
statSync(path: PathLike, options: { throwIfNoEntry?: true }): Stats<number>;
statSync(path: PathLike, options: { throwIfNoEntry: false }): Stats<number> | undefined;
statSync(path: PathLike, options: { bigint: false; throwIfNoEntry?: true }): Stats<number>;
statSync(path: PathLike, options: { bigint: true; throwIfNoEntry?: true }): Stats<bigint>;
statSync(path: PathLike, options: { bigint: false; throwIfNoEntry: false }): Stats<number> | undefined;
statSync(path: PathLike, options: { bigint: true; throwIfNoEntry: false }): Stats<bigint> | undefined;
statSync(path: PathLike, options?: opts.IStatOptions): Stats | undefined {
const { bigint = true, throwIfNoEntry = true } = getStatOptions(options);
return this.statBase(pathToFilename(path), bigint as any, throwIfNoEntry as any);
}
stat(path: PathLike, callback: TCallback<Stats>): void;
stat(path: PathLike, options: opts.IStatOptions, callback: TCallback<Stats>): void;
stat(path: PathLike, a: TCallback<Stats> | opts.IStatOptions, b?: TCallback<Stats>): void {
const [{ bigint = false, throwIfNoEntry = true }, callback] = getStatOptsAndCb(a, b);
this.wrapAsync(this.statBase, [pathToFilename(path), bigint, throwIfNoEntry], callback);
}
private fstatBase(fd: number): Stats<number>;
private fstatBase(fd: number, bigint: false): Stats<number>;
private fstatBase(fd: number, bigint: true): Stats<bigint>;
private fstatBase(fd: number, bigint: boolean = false): Stats {
const file = this.getFileByFd(fd);
if (!file) throw createError(EBADF, 'fstat');
return Stats.build(file.node, bigint);
}
fstatSync(fd: number): Stats<number>;
fstatSync(fd: number, options: { bigint: false }): Stats<number>;
fstatSync(fd: number, options: { bigint: true }): Stats<bigint>;
fstatSync(fd: number, options?: opts.IFStatOptions): Stats {
return this.fstatBase(fd, getStatOptions(options).bigint as any);
}
fstat(fd: number, callback: TCallback<Stats>): void;
fstat(fd: number, options: opts.IFStatOptions, callback: TCallback<Stats>): void;
fstat(fd: number, a: TCallback<Stats> | opts.IFStatOptions, b?: TCallback<Stats>): void {
const [opts, callback] = getStatOptsAndCb(a, b);
this.wrapAsync(this.fstatBase, [fd, opts.bigint], callback);
}
private renameBase(oldPathFilename: string, newPathFilename: string) {
const link = this.getLink(filenameToSteps(oldPathFilename));
if (!link) throw createError(ENOENT, 'rename', oldPathFilename, newPathFilename);
// TODO: Check if it is directory, if non-empty, we cannot move it, right?
const newPathSteps = filenameToSteps(newPathFilename);
// Check directory exists for the new location.
const newPathDirLink = this.getLinkParent(newPathSteps);
Iif (!newPathDirLink) throw createError(ENOENT, 'rename', oldPathFilename, newPathFilename);
// TODO: Also treat cases with directories and symbolic links.
// TODO: See: http://man7.org/linux/man-pages/man2/rename.2.html
// Remove hard link from old folder.
const oldLinkParent = link.parent;
if (oldLinkParent) {
oldLinkParent.deleteChild(link);
}
// Rename should overwrite the new path, if that exists.
const name = newPathSteps[newPathSteps.length - 1];
link.name = name;
link.steps = [...newPathDirLink.steps, name];
newPathDirLink.setChild(link.getName(), link);
}
renameSync(oldPath: PathLike, newPath: PathLike) {
const oldPathFilename = pathToFilename(oldPath);
const newPathFilename = pathToFilename(newPath);
this.renameBase(oldPathFilename, newPathFilename);
}
rename(oldPath: PathLike, newPath: PathLike, callback: TCallback<void>) {
const oldPathFilename = pathToFilename(oldPath);
const newPathFilename = pathToFilename(newPath);
this.wrapAsync(this.renameBase, [oldPathFilename, newPathFilename], callback);
}
private existsBase(filename: string): boolean {
return !!this.statBase(filename);
}
existsSync(path: PathLike): boolean {
try {
return this.existsBase(pathToFilename(path));
} catch (err) {
return false;
}
}
exists(path: PathLike, callback: (exists: boolean) => void) {
const filename = pathToFilename(path);
if (typeof callback !== 'function') throw Error(ERRSTR.CB);
setImmediate(() => {
try {
callback(this.existsBase(filename));
} catch (err) {
callback(false);
}
});
}
private accessBase(filename: string, mode: number) {
const link = this.getLinkOrThrow(filename, 'access');
// TODO: Verify permissions
}
accessSync(path: PathLike, mode: number = F_OK) {
const filename = pathToFilename(path);
mode = mode | 0;
this.accessBase(filename, mode);
}
access(path: PathLike, callback: TCallback<void>);
access(path: PathLike, mode: number, callback: TCallback<void>);
access(path: PathLike, a: TCallback<void> | number, b?: TCallback<void>) {
let mode: number = F_OK;
let callback: TCallback<void>;
Iif (typeof a !== 'function') {
mode = a | 0; // cast to number
callback = validateCallback(b);
} else {
callback = a;
}
const filename = pathToFilename(path);
this.wrapAsync(this.accessBase, [filename, mode], callback);
}
appendFileSync(id: TFileId, data: TData, options?: IAppendFileOptions | string) {
const opts = getAppendFileOpts(options);
// force append behavior when using a supplied file descriptor
Iif (!opts.flag || isFd(id)) opts.flag = 'a';
this.writeFileSync(id, data, opts);
}
appendFile(id: TFileId, data: TData, callback: TCallback<void>);
appendFile(id: TFileId, data: TData, options: IAppendFileOptions | string, callback: TCallback<void>);
appendFile(id: TFileId, data: TData, a, b?) {
const [opts, callback] = getAppendFileOptsAndCb(a, b);
// force append behavior when using a supplied file descriptor
if (!opts.flag || isFd(id)) opts.flag = 'a';
this.writeFile(id, data, opts, callback);
}
private readdirBase(filename: string, options: opts.IReaddirOptions): TDataOut[] | Dirent[] {
const steps = filenameToSteps(filename);
const link: Link | null = this.getResolvedLink(steps);
if (!link) throw createError(ENOENT, 'readdir', filename);
const node = link.getNode();
Iif (!node.isDirectory()) throw createError(ENOTDIR, 'scandir', filename);
const list: Dirent[] = []; // output list
for (const name of link.children.keys()) {
const child = link.getChild(name);
if (!child || name === '.' || name === '..') continue;
list.push(Dirent.build(child, options.encoding));
// recursion
if (options.recursive && child.children.size) {
const recurseOptions = { ...options, recursive: true, withFileTypes: true };
const childList = this.readdirBase(child.getPath(), recurseOptions) as Dirent[];
list.push(...childList);
}
}
if (!isWin && options.encoding !== 'buffer')
list.sort((a, b) => {
if (a.name < b.name) return -1;
if (a.name > b.name) return 1;
return 0;
});
if (options.withFileTypes) return list;
let filename2 = filename;
Iif (isWin) {
filename2 = filename2.replace(/\\/g, '/');
}
return list.map(dirent => {
if (options.recursive) {
let fullPath = pathModule.join(dirent.path, dirent.name.toString());
Iif (isWin) {
fullPath = fullPath.replace(/\\/g, '/');
}
return fullPath.replace(filename2 + pathModule.posix.sep, '');
}
return dirent.name;
});
}
readdirSync(path: PathLike, options?: opts.IReaddirOptions | string): TDataOut[] | Dirent[] {
const opts = getReaddirOptions(options);
const filename = pathToFilename(path);
return this.readdirBase(filename, opts);
}
readdir(path: PathLike, callback: TCallback<TDataOut[] | Dirent[]>);
readdir(path: PathLike, options: opts.IReaddirOptions | string, callback: TCallback<TDataOut[] | Dirent[]>);
readdir(path: PathLike, a?, b?) {
const [options, callback] = getReaddirOptsAndCb(a, b);
const filename = pathToFilename(path);
this.wrapAsync(this.readdirBase, [filename, options], callback);
}
private readlinkBase(filename: string, encoding: TEncodingExtended | undefined): TDataOut {
const link = this.getLinkOrThrow(filename, 'readlink');
const node = link.getNode();
Iif (!node.isSymlink()) throw createError(EINVAL, 'readlink', filename);
const str = sep + node.symlink.join(sep);
return strToEncoding(str, encoding);
}
readlinkSync(path: PathLike, options?: opts.IOptions): TDataOut {
const opts = getDefaultOpts(options);
const filename = pathToFilename(path);
return this.readlinkBase(filename, opts.encoding);
}
readlink(path: PathLike, callback: TCallback<TDataOut>);
readlink(path: PathLike, options: opts.IOptions, callback: TCallback<TDataOut>);
readlink(path: PathLike, a: TCallback<TDataOut> | opts.IOptions, b?: TCallback<TDataOut>) {
const [opts, callback] = getDefaultOptsAndCb(a, b);
const filename = pathToFilename(path);
this.wrapAsync(this.readlinkBase, [filename, opts.encoding], callback);
}
private fsyncBase(fd: number) {
this.getFileByFdOrThrow(fd, 'fsync');
}
fsyncSync(fd: number) {
this.fsyncBase(fd);
}
fsync(fd: number, callback: TCallback<void>) {
this.wrapAsync(this.fsyncBase, [fd], callback);
}
private fdatasyncBase(fd: number) {
this.getFileByFdOrThrow(fd, 'fdatasync');
}
fdatasyncSync(fd: number) {
this.fdatasyncBase(fd);
}
fdatasync(fd: number, callback: TCallback<void>) {
this.wrapAsync(this.fdatasyncBase, [fd], callback);
}
private ftruncateBase(fd: number, len?: number) {
const file = this.getFileByFdOrThrow(fd, 'ftruncate');
file.truncate(len);
}
ftruncateSync(fd: number, len?: number) {
this.ftruncateBase(fd, len);
}
ftruncate(fd: number, callback: TCallback<void>);
ftruncate(fd: number, len: number, callback: TCallback<void>);
ftruncate(fd: number, a: TCallback<void> | number, b?: TCallback<void>) {
const len: number = typeof a === 'number' ? a : 0;
const callback: TCallback<void> = validateCallback(typeof a === 'number' ? b : a);
this.wrapAsync(this.ftruncateBase, [fd, len], callback);
}
private truncateBase(path: PathLike, len?: number) {
const fd = this.openSync(path, 'r+');
try {
this.ftruncateSync(fd, len);
} finally {
this.closeSync(fd);
}
}
/**
* `id` should be a file descriptor or a path. `id` as file descriptor will
* not be supported soon.
*/
truncateSync(id: TFileId, len?: number) {
if (isFd(id)) return this.ftruncateSync(id as number, len);
this.truncateBase(id as PathLike, len);
}
truncate(id: TFileId, callback: TCallback<void>);
truncate(id: TFileId, len: number, callback: TCallback<void>);
truncate(id: TFileId, a: TCallback<void> | number, b?: TCallback<void>) {
const len: number = typeof a === 'number' ? a : 0;
const callback: TCallback<void> = validateCallback(typeof a === 'number' ? b : a);
Iif (isFd(id)) return this.ftruncate(id as number, len, callback);
this.wrapAsync(this.truncateBase, [id, len], callback);
}
private futimesBase(fd: number, atime: number, mtime: number) {
const file = this.getFileByFdOrThrow(fd, 'futimes');
const node = file.node;
node.atime = new Date(atime * 1000);
node.mtime = new Date(mtime * 1000);
}
futimesSync(fd: number, atime: TTime, mtime: TTime) {
this.futimesBase(fd, toUnixTimestamp(atime), toUnixTimestamp(mtime));
}
futimes(fd: number, atime: TTime, mtime: TTime, callback: TCallback<void>) {
this.wrapAsync(this.futimesBase, [fd, toUnixTimestamp(atime), toUnixTimestamp(mtime)], callback);
}
private utimesBase(filename: string, atime: number, mtime: number) {
const fd = this.openSync(filename, 'r');
try {
this.futimesBase(fd, atime, mtime);
} finally {
this.closeSync(fd);
}
}
utimesSync(path: PathLike, atime: TTime, mtime: TTime) {
this.utimesBase(pathToFilename(path), toUnixTimestamp(atime), toUnixTimestamp(mtime));
}
utimes(path: PathLike, atime: TTime, mtime: TTime, callback: TCallback<void>) {
this.wrapAsync(this.utimesBase, [pathToFilename(path), toUnixTimestamp(atime), toUnixTimestamp(mtime)], callback);
}
private mkdirBase(filename: string, modeNum: number) {
const steps = filenameToSteps(filename);
// This will throw if user tries to create root dir `fs.mkdirSync('/')`.
if (!steps.length) {
throw createError(EEXIST, 'mkdir', filename);
}
const dir = this.getLinkParentAsDirOrThrow(filename, 'mkdir');
// Check path already exists.
const name = steps[steps.length - 1];
if (dir.getChild(name)) throw createError(EEXIST, 'mkdir', filename);
dir.createChild(name, this.createNode(true, modeNum));
}
/**
* Creates directory tree recursively.
* @param filename
* @param modeNum
*/
private mkdirpBase(filename: string, modeNum: number) {
const fullPath = resolve(filename);
const fullPathSansSlash = fullPath.substring(1);
const steps = !fullPathSansSlash ? [] : fullPathSansSlash.split(sep);
let link = this.root;
let created = false;
for (let i = 0; i < steps.length; i++) {
const step = steps[i];
Iif (!link.getNode().isDirectory()) throw createError(ENOTDIR, 'mkdir', link.getPath());
const child = link.getChild(step);
if (child) {
if (child.getNode().isDirectory()) link = child;
else throw createError(ENOTDIR, 'mkdir', child.getPath());
} else {
link = link.createChild(step, this.createNode(true, modeNum));
created = true;
}
}
return created ? fullPath : undefined;
}
mkdirSync(path: PathLike, options: opts.IMkdirOptions & { recursive: true }): string | undefined;
mkdirSync(path: PathLike, options?: TMode | (opts.IMkdirOptions & { recursive?: false })): void;
mkdirSync(path: PathLike, options?: TMode | opts.IMkdirOptions): string | undefined;
mkdirSync(path: PathLike, options?: TMode | opts.IMkdirOptions) {
const opts = getMkdirOptions(options);
const modeNum = modeToNumber(opts.mode, 0o777);
const filename = pathToFilename(path);
if (opts.recursive) return this.mkdirpBase(filename, modeNum);
this.mkdirBase(filename, modeNum);
}
mkdir(path: PathLike, callback: TCallback<void>);
mkdir(path: PathLike, mode: TMode | (opts.IMkdirOptions & { recursive?: false }), callback: TCallback<void>);
mkdir(path: PathLike, mode: opts.IMkdirOptions & { recursive: true }, callback: TCallback<string>);
mkdir(path: PathLike, mode: TMode | opts.IMkdirOptions, callback: TCallback<string>);
mkdir(path: PathLike, a: TCallback<void> | TMode | opts.IMkdirOptions, b?: TCallback<string> | TCallback<void>) {
const opts: TMode | opts.IMkdirOptions = getMkdirOptions(a);
const callback = validateCallback(typeof a === 'function' ? a : b!);
const modeNum = modeToNumber(opts.mode, 0o777);
const filename = pathToFilename(path);
if (opts.recursive) this.wrapAsync(this.mkdirpBase, [filename, modeNum], callback);
else this.wrapAsync(this.mkdirBase, [filename, modeNum], callback);
}
private mkdtempBase(prefix: string, encoding?: TEncodingExtended, retry: number = 5): TDataOut {
const filename = prefix + genRndStr6();
try {
this.mkdirBase(filename, MODE.DIR);
return strToEncoding(filename, encoding);
} catch (err) {
Iif (err.code === EEXIST) {
if (retry > 1) return this.mkdtempBase(prefix, encoding, retry - 1);
else throw Error('Could not create temp dir.');
} else throw err;
}
}
mkdtempSync(prefix: string, options?: opts.IOptions): TDataOut {
const { encoding } = getDefaultOpts(options);
if (!prefix || typeof prefix !== 'string') throw new TypeError('filename prefix is required');
nullCheck(prefix);
return this.mkdtempBase(prefix, encoding);
}
mkdtemp(prefix: string, callback: TCallback<string>);
mkdtemp(prefix: string, options: opts.IOptions, callback: TCallback<string>);
mkdtemp(prefix: string, a: TCallback<string> | opts.IOptions, b?: TCallback<string>) {
const [{ encoding }, callback] = getDefaultOptsAndCb(a, b);
if (!prefix || typeof prefix !== 'string') throw new TypeError('filename prefix is required');
Iif (!nullCheck(prefix)) return;
this.wrapAsync(this.mkdtempBase, [prefix, encoding], callback);
}
private rmdirBase(filename: string, options?: opts.IRmdirOptions) {
const opts = getRmdirOptions(options);
const link = this.getLinkAsDirOrThrow(filename, 'rmdir');
// Check directory is empty.
if (link.length && !opts.recursive) throw createError(ENOTEMPTY, 'rmdir', filename);
this.deleteLink(link);
}
rmdirSync(path: PathLike, options?: opts.IRmdirOptions) {
this.rmdirBase(pathToFilename(path), options);
}
rmdir(path: PathLike, callback: TCallback<void>);
rmdir(path: PathLike, options: opts.IRmdirOptions, callback: TCallback<void>);
rmdir(path: PathLike, a: TCallback<void> | opts.IRmdirOptions, b?: TCallback<void>) {
const opts: opts.IRmdirOptions = getRmdirOptions(a);
const callback: TCallback<void> = validateCallback(typeof a === 'function' ? a : b);
this.wrapAsync(this.rmdirBase, [pathToFilename(path), opts], callback);
}
private rmBase(filename: string, options: opts.IRmOptions = {}): void {
const link = this.getResolvedLink(filename);
if (!link) {
// "stat" is used to match Node's native error message.
if (!options.force) throw createError(ENOENT, 'stat', filename);
return;
}
if (link.getNode().isDirectory()) {
if (!options.recursive) {
throw createError(ERR_FS_EISDIR, 'rm', filename);
}
}
this.deleteLink(link);
}
public rmSync(path: PathLike, options?: opts.IRmOptions): void {
this.rmBase(pathToFilename(path), options);
}
public rm(path: PathLike, callback: TCallback<void>): void;
public rm(path: PathLike, options: opts.IRmOptions, callback: TCallback<void>): void;
public rm(path: PathLike, a: TCallback<void> | opts.IRmOptions, b?: TCallback<void>): void {
const [opts, callback] = getRmOptsAndCb(a, b);
this.wrapAsync(this.rmBase, [pathToFilename(path), opts], callback);
}
private fchmodBase(fd: number, modeNum: number) {
const file = this.getFileByFdOrThrow(fd, 'fchmod');
file.chmod(modeNum);
}
fchmodSync(fd: number, mode: TMode) {
this.fchmodBase(fd, modeToNumber(mode));
}
fchmod(fd: number, mode: TMode, callback: TCallback<void>) {
this.wrapAsync(this.fchmodBase, [fd, modeToNumber(mode)], callback);
}
private chmodBase(filename: string, modeNum: number) {
const fd = this.openSync(filename, 'r');
try {
this.fchmodBase(fd, modeNum);
} finally {
this.closeSync(fd);
}
}
chmodSync(path: PathLike, mode: TMode) {
const modeNum = modeToNumber(mode);
const filename = pathToFilename(path);
this.chmodBase(filename, modeNum);
}
chmod(path: PathLike, mode: TMode, callback: TCallback<void>) {
const modeNum = modeToNumber(mode);
const filename = pathToFilename(path);
this.wrapAsync(this.chmodBase, [filename, modeNum], callback);
}
private lchmodBase(filename: string, modeNum: number) {
const fd = this.openBase(filename, O_RDWR, 0, false);
try {
this.fchmodBase(fd, modeNum);
} finally {
this.closeSync(fd);
}
}
lchmodSync(path: PathLike, mode: TMode) {
const modeNum = modeToNumber(mode);
const filename = pathToFilename(path);
this.lchmodBase(filename, modeNum);
}
lchmod(path: PathLike, mode: TMode, callback: TCallback<void>) {
const modeNum = modeToNumber(mode);
const filename = pathToFilename(path);
this.wrapAsync(this.lchmodBase, [filename, modeNum], callback);
}
private fchownBase(fd: number, uid: number, gid: number) {
this.getFileByFdOrThrow(fd, 'fchown').chown(uid, gid);
}
fchownSync(fd: number, uid: number, gid: number) {
validateUid(uid);
validateGid(gid);
this.fchownBase(fd, uid, gid);
}
fchown(fd: number, uid: number, gid: number, callback: TCallback<void>) {
validateUid(uid);
validateGid(gid);
this.wrapAsync(this.fchownBase, [fd, uid, gid], callback);
}
private chownBase(filename: string, uid: number, gid: number) {
const link = this.getResolvedLinkOrThrow(filename, 'chown');
const node = link.getNode();
node.chown(uid, gid);
// if(node.isFile() || node.isSymlink()) {
//
// } else if(node.isDirectory()) {
//
// } else {
// TODO: What do we do here?
// }
}
chownSync(path: PathLike, uid: number, gid: number) {
validateUid(uid);
validateGid(gid);
this.chownBase(pathToFilename(path), uid, gid);
}
chown(path: PathLike, uid: number, gid: number, callback: TCallback<void>) {
validateUid(uid);
validateGid(gid);
this.wrapAsync(this.chownBase, [pathToFilename(path), uid, gid], callback);
}
private lchownBase(filename: string, uid: number, gid: number) {
this.getLinkOrThrow(filename, 'lchown').getNode().chown(uid, gid);
}
lchownSync(path: PathLike, uid: number, gid: number) {
validateUid(uid);
validateGid(gid);
this.lchownBase(pathToFilename(path), uid, gid);
}
lchown(path: PathLike, uid: number, gid: number, callback: TCallback<void>) {
validateUid(uid);
validateGid(gid);
this.wrapAsync(this.lchownBase, [pathToFilename(path), uid, gid], callback);
}
private statWatchers: Record<string, StatWatcher> = {};
watchFile(path: PathLike, listener: (curr: Stats, prev: Stats) => void): StatWatcher;
watchFile(path: PathLike, options: IWatchFileOptions, listener: (curr: Stats, prev: Stats) => void): StatWatcher;
watchFile(path: PathLike, a, b?): StatWatcher {
const filename = pathToFilename(path);
let options: IWatchFileOptions | null = a;
let listener: (curr: Stats, prev: Stats) => void = b;
Iif (typeof options === 'function') {
listener = a;
options = null;
}
Iif (typeof listener !== 'function') {
throw Error('"watchFile()" requires a listener function');
}
let interval = 5007;
let persistent = true;
if (options && typeof options === 'object') {
if (typeof options.interval === 'number') interval = options.interval;
Iif (typeof options.persistent === 'boolean') persistent = options.persistent;
}
let watcher: StatWatcher = this.statWatchers[filename];
if (!watcher) {
watcher = new this.StatWatcher();
watcher.start(filename, persistent, interval);
this.statWatchers[filename] = watcher;
}
watcher.addListener('change', listener);
return watcher;
}
unwatchFile(path: PathLike, listener?: (curr: Stats, prev: Stats) => void) {
const filename = pathToFilename(path);
const watcher = this.statWatchers[filename];
Iif (!watcher) return;
Iif (typeof listener === 'function') {
watcher.removeListener('change', listener);
} else {
watcher.removeAllListeners('change');
}
if (watcher.listenerCount('change') === 0) {
watcher.stop();
delete this.statWatchers[filename];
}
}
createReadStream(path: misc.PathLike, options?: opts.IReadStreamOptions | string): misc.IReadStream {
return new this.ReadStream(path, options);
}
createWriteStream(path: PathLike, options?: opts.IWriteStreamOptions | string): IWriteStream {
return new this.WriteStream(path, options);
}
// watch(path: PathLike): FSWatcher;
// watch(path: PathLike, options?: IWatchOptions | string): FSWatcher;
watch(
path: PathLike,
options?: IWatchOptions | string,
listener?: (eventType: string, filename: string) => void,
): FSWatcher {
const filename = pathToFilename(path);
let givenOptions: typeof options | null = options;
if (typeof options === 'function') {
listener = options;
givenOptions = null;
}
// tslint:disable-next-line prefer-const
let { persistent, recursive, encoding }: IWatchOptions = getDefaultOpts(givenOptions);
if (persistent === undefined) persistent = true;
if (recursive === undefined) recursive = false;
const watcher = new this.FSWatcher();
watcher.start(filename, persistent, recursive, encoding as BufferEncoding);
if (listener) {
watcher.addListener('change', listener);
}
return watcher;
}
public cpSync: FsSynchronousApi['cpSync'] = notImplemented;
public lutimesSync: FsSynchronousApi['lutimesSync'] = notImplemented;
public statfsSync: FsSynchronousApi['statfsSync'] = notImplemented;
public opendirSync: FsSynchronousApi['opendirSync'] = notImplemented;
public cp: FsCallbackApi['cp'] = notImplemented;
public lutimes: FsCallbackApi['lutimes'] = notImplemented;
public statfs: FsCallbackApi['statfs'] = notImplemented;
public openAsBlob: FsCallbackApi['openAsBlob'] = notImplemented;
public opendir: FsCallbackApi['opendir'] = notImplemented;
}
function emitStop(self) {
self.emit('stop');
}
export class StatWatcher extends EventEmitter {
vol: Volume;
filename: string;
interval: number;
timeoutRef?;
setTimeout: TSetTimeout;
prev: Stats;
constructor(vol: Volume) {
super();
this.vol = vol;
}
private loop() {
this.timeoutRef = this.setTimeout(this.onInterval, this.interval);
}
private hasChanged(stats: Stats): boolean {
// if(!this.prev) return false;
if (stats.mtimeMs > this.prev.mtimeMs) return true;
Iif (stats.nlink !== this.prev.nlink) return true;
return false;
}
private onInterval = () => {
try {
const stats = this.vol.statSync(this.filename);
if (this.hasChanged(stats)) {
this.emit('change', stats, this.prev);
this.prev = stats;
}
} finally {
this.loop();
}
};
start(path: string, persistent: boolean = true, interval: number = 5007) {
this.filename = pathToFilename(path);
this.setTimeout = persistent
? setTimeout.bind(typeof globalThis !== 'undefined' ? globalThis : global)
: setTimeoutUnref;
this.interval = interval;
this.prev = this.vol.statSync(this.filename);
this.loop();
}
stop() {
clearTimeout(this.timeoutRef);
queueMicrotask(() => {
emitStop.call(this, this);
});
}
}
/* tslint:disable no-var-keyword prefer-const */
// ---------------------------------------- ReadStream
var pool;
function allocNewPool(poolSize) {
pool = bufferAllocUnsafe(poolSize);
pool.used = 0;
}
util.inherits(FsReadStream, Readable);
exports.ReadStream = FsReadStream;
function FsReadStream(vol, path, options) {
Iif (!(this instanceof FsReadStream)) return new (FsReadStream as any)(vol, path, options);
this._vol = vol;
// a little bit bigger buffer and water marks by default
options = Object.assign({}, getOptions(options, {}));
if (options.highWaterMark === undefined) options.highWaterMark = 64 * 1024;
Readable.call(this, options);
this.path = pathToFilename(path);
this.fd = options.fd === undefined ? null : options.fd;
this.flags = options.flags === undefined ? 'r' : options.flags;
this.mode = options.mode === undefined ? 0o666 : options.mode;
this.start = options.start;
this.end = options.end;
this.autoClose = options.autoClose === undefined ? true : options.autoClose;
this.pos = undefined;
this.bytesRead = 0;
Iif (this.start !== undefined) {
Iif (typeof this.start !== 'number') {
throw new TypeError('"start" option must be a Number');
}
if (this.end === undefined) {
this.end = Infinity;
} else Iif (typeof this.end !== 'number') {
throw new TypeError('"end" option must be a Number');
}
Iif (this.start > this.end) {
throw new Error('"start" option must be <= "end" option');
}
this.pos = this.start;
}
if (typeof this.fd !== 'number') this.open();
this.on('end', function () {
Iif (this.autoClose) {
Iif (this.destroy) this.destroy();
}
});
}
FsReadStream.prototype.open = function () {
var self = this; // tslint:disable-line no-this-assignment
this._vol.open(this.path, this.flags, this.mode, (er, fd) => {
Iif (er) {
Iif (self.autoClose) {
Iif (self.destroy) self.destroy();
}
self.emit('error', er);
return;
}
self.fd = fd;
self.emit('open', fd);
// start the flow of data.
self.read();
});
};
FsReadStream.prototype._read = function (n) {
if (typeof this.fd !== 'number') {
return this.once('open', function () {
this._read(n);
});
}
Iif (this.destroyed) return;
if (!pool || pool.length - pool.used < kMinPoolSpace) {
// discard the old pool.
allocNewPool(this._readableState.highWaterMark);
}
// Grab another reference to the pool in the case that while we're
// in the thread pool another read() finishes up the pool, and
// allocates a new one.
var thisPool = pool;
var toRead = Math.min(pool.length - pool.used, n);
var start = pool.used;
Iif (this.pos !== undefined) toRead = Math.min(this.end - this.pos + 1, toRead);
// already read everything we were supposed to read!
// treat as EOF.
Iif (toRead <= 0) return this.push(null);
// the actual read.
var self = this; // tslint:disable-line no-this-assignment
this._vol.read(this.fd, pool, pool.used, toRead, this.pos, onread);
// move the pool positions, and internal position for reading.
Iif (this.pos !== undefined) this.pos += toRead;
pool.used += toRead;
function onread(er, bytesRead) {
Iif (er) {
Iif (self.autoClose && self.destroy) {
self.destroy();
}
self.emit('error', er);
} else {
var b = null;
if (bytesRead > 0) {
self.bytesRead += bytesRead;
b = thisPool.slice(start, start + bytesRead);
}
self.push(b);
}
}
};
FsReadStream.prototype._destroy = function (err, cb) {
this.close(err2 => {
cb(err || err2);
});
};
FsReadStream.prototype.close = function (cb) {
Iif (cb) this.once('close', cb);
Iif (this.closed || typeof this.fd !== 'number') {
Iif (typeof this.fd !== 'number') {
this.once('open', closeOnOpen);
return;
}
return queueMicrotask(() => this.emit('close'));
}
// Since Node 18, there is only a getter for '.closed'.
// The first branch mimics other setters from Readable.
// See https://github.com/nodejs/node/blob/v18.0.0/lib/internal/streams/readable.js#L1243
if (typeof this._readableState?.closed === 'boolean') {
this._readableState.closed = true;
} else {
this.closed = true;
}
this._vol.close(this.fd, er => {
if (er) this.emit('error', er);
else this.emit('close');
});
this.fd = null;
};
// needed because as it will be called with arguments
// that does not match this.close() signature
function closeOnOpen(fd) {
this.close();
}
// ---------------------------------------- WriteStream
export interface IWriteStream extends Writable {
bytesWritten: number;
path: string;
pending: boolean;
new (path: PathLike, options: opts.IWriteStreamOptions);
open();
close();
}
util.inherits(FsWriteStream, Writable);
exports.WriteStream = FsWriteStream;
function FsWriteStream(vol, path, options) {
Iif (!(this instanceof FsWriteStream)) return new (FsWriteStream as any)(vol, path, options);
this._vol = vol;
options = Object.assign({}, getOptions(options, {}));
Writable.call(this, options);
this.path = pathToFilename(path);
this.fd = options.fd === undefined ? null : options.fd;
this.flags = options.flags === undefined ? 'w' : options.flags;
this.mode = options.mode === undefined ? 0o666 : options.mode;
this.start = options.start;
this.autoClose = options.autoClose === undefined ? true : !!options.autoClose;
this.pos = undefined;
this.bytesWritten = 0;
this.pending = true;
Iif (this.start !== undefined) {
Iif (typeof this.start !== 'number') {
throw new TypeError('"start" option must be a Number');
}
Iif (this.start < 0) {
throw new Error('"start" must be >= zero');
}
this.pos = this.start;
}
Iif (options.encoding) this.setDefaultEncoding(options.encoding);
if (typeof this.fd !== 'number') this.open();
// dispose on finish.
this.once('finish', function () {
if (this.autoClose) {
this.close();
}
});
}
FsWriteStream.prototype.open = function () {
this._vol.open(
this.path,
this.flags,
this.mode,
function (er, fd) {
Iif (er) {
Iif (this.autoClose && this.destroy) {
this.destroy();
}
this.emit('error', er);
return;
}
this.fd = fd;
this.pending = false;
this.emit('open', fd);
}.bind(this),
);
};
FsWriteStream.prototype._write = function (data, encoding, cb) {
Iif (!(data instanceof Buffer || data instanceof Uint8Array)) return this.emit('error', new Error('Invalid data'));
if (typeof this.fd !== 'number') {
return this.once('open', function () {
this._write(data, encoding, cb);
});
}
var self = this; // tslint:disable-line no-this-assignment
this._vol.write(this.fd, data, 0, data.length, this.pos, (er, bytes) => {
Iif (er) {
Iif (self.autoClose && self.destroy) {
self.destroy();
}
return cb(er);
}
self.bytesWritten += bytes;
cb();
});
Iif (this.pos !== undefined) this.pos += data.length;
};
FsWriteStream.prototype._writev = function (data, cb) {
Iif (typeof this.fd !== 'number') {
return this.once('open', function () {
this._writev(data, cb);
});
}
const self = this; // tslint:disable-line no-this-assignment
const len = data.length;
const chunks = new Array(len);
var size = 0;
for (var i = 0; i < len; i++) {
var chunk = data[i].chunk;
chunks[i] = chunk;
size += chunk.length;
}
const buf = Buffer.concat(chunks);
this._vol.write(this.fd, buf, 0, buf.length, this.pos, (er, bytes) => {
Iif (er) {
Iif (self.destroy) self.destroy();
return cb(er);
}
self.bytesWritten += bytes;
cb();
});
Iif (this.pos !== undefined) this.pos += size;
};
FsWriteStream.prototype.close = function (cb) {
if (cb) this.once('close', cb);
if (this.closed || typeof this.fd !== 'number') {
if (typeof this.fd !== 'number') {
this.once('open', closeOnOpen);
return;
}
return queueMicrotask(() => this.emit('close'));
}
// Since Node 18, there is only a getter for '.closed'.
// The first branch mimics other setters from Writable.
// See https://github.com/nodejs/node/blob/v18.0.0/lib/internal/streams/writable.js#L766
if (typeof this._writableState?.closed === 'boolean') {
this._writableState.closed = true;
} else E{
this.closed = true;
}
this._vol.close(this.fd, er => {
if (er) this.emit('error', er);
else this.emit('close');
});
this.fd = null;
};
FsWriteStream.prototype._destroy = FsReadStream.prototype._destroy;
// There is no shutdown() for files.
FsWriteStream.prototype.destroySoon = FsWriteStream.prototype.end;
// ---------------------------------------- FSWatcher
export class FSWatcher extends EventEmitter {
_vol: Volume;
_filename: string = '';
_steps: string[];
_filenameEncoded: TDataOut = '';
// _persistent: boolean = true;
_recursive: boolean = false;
_encoding: BufferEncoding = ENCODING_UTF8;
_link: Link;
_timer; // Timer that keeps this task persistent.
// inode -> removers
private _listenerRemovers = new Map<number, Array<() => void>>();
constructor(vol: Volume) {
super();
this._vol = vol;
// TODO: Emit "error" messages when watching.
// this._handle.onchange = function(status, eventType, filename) {
// if (status < 0) {
// self._handle.close();
// const error = !filename ?
// errnoException(status, 'Error watching file for changes:') :
// errnoException(status, `Error watching file ${filename} for changes:`);
// error.filename = filename;
// self.emit('error', error);
// } else {
// self.emit('change', eventType, filename);
// }
// };
}
private _getName(): string {
return this._steps[this._steps.length - 1];
}
private _onParentChild = (link: Link) => {
Iif (link.getName() === this._getName()) {
this._emit('rename');
}
};
private _emit = (type: 'change' | 'rename') => {
this.emit('change', type, this._filenameEncoded);
};
private _persist = () => {
this._timer = setTimeout(this._persist, 1e6);
};
start(
path: PathLike,
persistent: boolean = true,
recursive: boolean = false,
encoding: BufferEncoding = ENCODING_UTF8,
) {
this._filename = pathToFilename(path);
this._steps = filenameToSteps(this._filename);
this._filenameEncoded = strToEncoding(this._filename);
// this._persistent = persistent;
this._recursive = recursive;
this._encoding = encoding;
try {
this._link = this._vol.getLinkOrThrow(this._filename, 'FSWatcher');
} catch (err) {
const error = new Error(`watch ${this._filename} ${err.code}`);
(error as any).code = err.code;
(error as any).errno = err.code;
throw error;
}
const watchLinkNodeChanged = (link: Link) => {
const filepath = link.getPath();
const node = link.getNode();
const onNodeChange = () => {
let filename = relative(this._filename, filepath);
if (!filename) {
filename = this._getName();
}
return this.emit('change', 'change', filename);
};
node.on('change', onNodeChange);
const removers = this._listenerRemovers.get(node.ino) ?? [];
removers.push(() => node.removeListener('change', onNodeChange));
this._listenerRemovers.set(node.ino, removers);
};
const watchLinkChildrenChanged = (link: Link) => {
const node = link.getNode();
// when a new link added
const onLinkChildAdd = (l: Link) => {
this.emit('change', 'rename', relative(this._filename, l.getPath()));
setTimeout(() => {
// 1. watch changes of the new link-node
watchLinkNodeChanged(l);
// 2. watch changes of the new link-node's children
watchLinkChildrenChanged(l);
});
};
// when a new link deleted
const onLinkChildDelete = (l: Link) => {
// remove the listeners of the children nodes
const removeLinkNodeListeners = (curLink: Link) => {
const ino = curLink.getNode().ino;
const removers = this._listenerRemovers.get(ino);
if (removers) {
removers.forEach(r => r());
this._listenerRemovers.delete(ino);
}
for (const [name, childLink] of curLink.children.entries()) {
Iif (childLink && name !== '.' && name !== '..') {
removeLinkNodeListeners(childLink);
}
}
};
removeLinkNodeListeners(l);
this.emit('change', 'rename', relative(this._filename, l.getPath()));
};
// children nodes changed
for (const [name, childLink] of link.children.entries()) {
if (childLink && name !== '.' && name !== '..') {
watchLinkNodeChanged(childLink);
}
}
// link children add/remove
link.on('child:add', onLinkChildAdd);
link.on('child:delete', onLinkChildDelete);
const removers = this._listenerRemovers.get(node.ino) ?? [];
removers.push(() => {
link.removeListener('child:add', onLinkChildAdd);
link.removeListener('child:delete', onLinkChildDelete);
});
if (recursive) {
for (const [name, childLink] of link.children.entries()) {
if (childLink && name !== '.' && name !== '..') {
watchLinkChildrenChanged(childLink);
}
}
}
};
watchLinkNodeChanged(this._link);
watchLinkChildrenChanged(this._link);
const parent = this._link.parent;
if (parent) {
// parent.on('child:add', this._onParentChild);
parent.setMaxListeners(parent.getMaxListeners() + 1);
parent.on('child:delete', this._onParentChild);
}
if (persistent) this._persist();
}
close() {
clearTimeout(this._timer);
this._listenerRemovers.forEach(removers => {
removers.forEach(r => r());
});
this._listenerRemovers.clear();
const parent = this._link.parent;
if (parent) {
// parent.removeListener('child:add', this._onParentChild);
parent.removeListener('child:delete', this._onParentChild);
}
}
}
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