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- /**
- * The `fs/promises` API provides asynchronous file system methods that return
- * promises.
- *
- * The promise APIs use the underlying Node.js threadpool to perform file
- * system operations off the event loop thread. These operations are not
- * synchronized or threadsafe. Care must be taken when performing multiple
- * concurrent modifications on the same file or data corruption may occur.
- * @since v10.0.0
- */
- declare module "fs/promises" {
- import { Abortable } from "node:events";
- import { Stream } from "node:stream";
- import { ReadableStream } from "node:stream/web";
- import {
- BigIntStats,
- BigIntStatsFs,
- BufferEncodingOption,
- constants as fsConstants,
- CopyOptions,
- Dir,
- Dirent,
- GlobOptions,
- GlobOptionsWithFileTypes,
- GlobOptionsWithoutFileTypes,
- MakeDirectoryOptions,
- Mode,
- ObjectEncodingOptions,
- OpenDirOptions,
- OpenMode,
- PathLike,
- ReadStream,
- ReadVResult,
- RmDirOptions,
- RmOptions,
- StatFsOptions,
- StatOptions,
- Stats,
- StatsFs,
- TimeLike,
- WatchEventType,
- WatchOptions,
- WriteStream,
- WriteVResult,
- } from "node:fs";
- import { Interface as ReadlineInterface } from "node:readline";
- interface FileChangeInfo<T extends string | Buffer> {
- eventType: WatchEventType;
- filename: T | null;
- }
- interface FlagAndOpenMode {
- mode?: Mode | undefined;
- flag?: OpenMode | undefined;
- }
- interface FileReadResult<T extends NodeJS.ArrayBufferView> {
- bytesRead: number;
- buffer: T;
- }
- interface FileReadOptions<T extends NodeJS.ArrayBufferView = Buffer> {
- /**
- * @default `Buffer.alloc(0xffff)`
- */
- buffer?: T;
- /**
- * @default 0
- */
- offset?: number | null;
- /**
- * @default `buffer.byteLength`
- */
- length?: number | null;
- position?: number | null;
- }
- interface CreateReadStreamOptions extends Abortable {
- encoding?: BufferEncoding | null | undefined;
- autoClose?: boolean | undefined;
- emitClose?: boolean | undefined;
- start?: number | undefined;
- end?: number | undefined;
- highWaterMark?: number | undefined;
- }
- interface CreateWriteStreamOptions {
- encoding?: BufferEncoding | null | undefined;
- autoClose?: boolean | undefined;
- emitClose?: boolean | undefined;
- start?: number | undefined;
- highWaterMark?: number | undefined;
- flush?: boolean | undefined;
- }
- // TODO: Add `EventEmitter` close
- interface FileHandle {
- /**
- * The numeric file descriptor managed by the {FileHandle} object.
- * @since v10.0.0
- */
- readonly fd: number;
- /**
- * Alias of `filehandle.writeFile()`.
- *
- * When operating on file handles, the mode cannot be changed from what it was set
- * to with `fsPromises.open()`. Therefore, this is equivalent to `filehandle.writeFile()`.
- * @since v10.0.0
- * @return Fulfills with `undefined` upon success.
- */
- appendFile(
- data: string | Uint8Array,
- options?:
- | (ObjectEncodingOptions & Abortable)
- | BufferEncoding
- | null,
- ): Promise<void>;
- /**
- * Changes the ownership of the file. A wrapper for [`chown(2)`](http://man7.org/linux/man-pages/man2/chown.2.html).
- * @since v10.0.0
- * @param uid The file's new owner's user id.
- * @param gid The file's new group's group id.
- * @return Fulfills with `undefined` upon success.
- */
- chown(uid: number, gid: number): Promise<void>;
- /**
- * Modifies the permissions on the file. See [`chmod(2)`](http://man7.org/linux/man-pages/man2/chmod.2.html).
- * @since v10.0.0
- * @param mode the file mode bit mask.
- * @return Fulfills with `undefined` upon success.
- */
- chmod(mode: Mode): Promise<void>;
- /**
- * Unlike the 16 KiB default `highWaterMark` for a `stream.Readable`, the stream
- * returned by this method has a default `highWaterMark` of 64 KiB.
- *
- * `options` can include `start` and `end` values to read a range of bytes from
- * the file instead of the entire file. Both `start` and `end` are inclusive and
- * start counting at 0, allowed values are in the
- * \[0, [`Number.MAX_SAFE_INTEGER`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/MAX_SAFE_INTEGER)\] range. If `start` is
- * omitted or `undefined`, `filehandle.createReadStream()` reads sequentially from
- * the current file position. The `encoding` can be any one of those accepted by `Buffer`.
- *
- * If the `FileHandle` points to a character device that only supports blocking
- * reads (such as keyboard or sound card), read operations do not finish until data
- * is available. This can prevent the process from exiting and the stream from
- * closing naturally.
- *
- * By default, the stream will emit a `'close'` event after it has been
- * destroyed. Set the `emitClose` option to `false` to change this behavior.
- *
- * ```js
- * import { open } from 'node:fs/promises';
- *
- * const fd = await open('/dev/input/event0');
- * // Create a stream from some character device.
- * const stream = fd.createReadStream();
- * setTimeout(() => {
- * stream.close(); // This may not close the stream.
- * // Artificially marking end-of-stream, as if the underlying resource had
- * // indicated end-of-file by itself, allows the stream to close.
- * // This does not cancel pending read operations, and if there is such an
- * // operation, the process may still not be able to exit successfully
- * // until it finishes.
- * stream.push(null);
- * stream.read(0);
- * }, 100);
- * ```
- *
- * If `autoClose` is false, then the file descriptor won't be closed, even if
- * there's an error. It is the application's responsibility to close it and make
- * sure there's no file descriptor leak. If `autoClose` is set to true (default
- * behavior), on `'error'` or `'end'` the file descriptor will be closed
- * automatically.
- *
- * An example to read the last 10 bytes of a file which is 100 bytes long:
- *
- * ```js
- * import { open } from 'node:fs/promises';
- *
- * const fd = await open('sample.txt');
- * fd.createReadStream({ start: 90, end: 99 });
- * ```
- * @since v16.11.0
- */
- createReadStream(options?: CreateReadStreamOptions): ReadStream;
- /**
- * `options` may also include a `start` option to allow writing data at some
- * position past the beginning of the file, allowed values are in the
- * \[0, [`Number.MAX_SAFE_INTEGER`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/MAX_SAFE_INTEGER)\] range. Modifying a file rather than
- * replacing it may require the `flags` `open` option to be set to `r+` rather than
- * the default `r`. The `encoding` can be any one of those accepted by `Buffer`.
- *
- * If `autoClose` is set to true (default behavior) on `'error'` or `'finish'` the file descriptor will be closed automatically. If `autoClose` is false,
- * then the file descriptor won't be closed, even if there's an error.
- * It is the application's responsibility to close it and make sure there's no
- * file descriptor leak.
- *
- * By default, the stream will emit a `'close'` event after it has been
- * destroyed. Set the `emitClose` option to `false` to change this behavior.
- * @since v16.11.0
- */
- createWriteStream(options?: CreateWriteStreamOptions): WriteStream;
- /**
- * Forces all currently queued I/O operations associated with the file to the
- * operating system's synchronized I/O completion state. Refer to the POSIX [`fdatasync(2)`](http://man7.org/linux/man-pages/man2/fdatasync.2.html) documentation for details.
- *
- * Unlike `filehandle.sync` this method does not flush modified metadata.
- * @since v10.0.0
- * @return Fulfills with `undefined` upon success.
- */
- datasync(): Promise<void>;
- /**
- * Request that all data for the open file descriptor is flushed to the storage
- * device. The specific implementation is operating system and device specific.
- * Refer to the POSIX [`fsync(2)`](http://man7.org/linux/man-pages/man2/fsync.2.html) documentation for more detail.
- * @since v10.0.0
- * @return Fulfills with `undefined` upon success.
- */
- sync(): Promise<void>;
- /**
- * Reads data from the file and stores that in the given buffer.
- *
- * If the file is not modified concurrently, the end-of-file is reached when the
- * number of bytes read is zero.
- * @since v10.0.0
- * @param buffer A buffer that will be filled with the file data read.
- * @param offset The location in the buffer at which to start filling.
- * @param length The number of bytes to read.
- * @param position The location where to begin reading data from the file. If `null`, data will be read from the current file position, and the position will be updated. If `position` is an
- * integer, the current file position will remain unchanged.
- * @return Fulfills upon success with an object with two properties:
- */
- read<T extends NodeJS.ArrayBufferView>(
- buffer: T,
- offset?: number | null,
- length?: number | null,
- position?: number | null,
- ): Promise<FileReadResult<T>>;
- read<T extends NodeJS.ArrayBufferView = Buffer>(
- buffer: T,
- options?: FileReadOptions<T>,
- ): Promise<FileReadResult<T>>;
- read<T extends NodeJS.ArrayBufferView = Buffer>(options?: FileReadOptions<T>): Promise<FileReadResult<T>>;
- /**
- * Returns a byte-oriented `ReadableStream` that may be used to read the file's
- * contents.
- *
- * An error will be thrown if this method is called more than once or is called
- * after the `FileHandle` is closed or closing.
- *
- * ```js
- * import {
- * open,
- * } from 'node:fs/promises';
- *
- * const file = await open('./some/file/to/read');
- *
- * for await (const chunk of file.readableWebStream())
- * console.log(chunk);
- *
- * await file.close();
- * ```
- *
- * While the `ReadableStream` will read the file to completion, it will not
- * close the `FileHandle` automatically. User code must still call the`fileHandle.close()` method.
- * @since v17.0.0
- * @experimental
- */
- readableWebStream(): ReadableStream;
- /**
- * Asynchronously reads the entire contents of a file.
- *
- * If `options` is a string, then it specifies the `encoding`.
- *
- * The `FileHandle` has to support reading.
- *
- * If one or more `filehandle.read()` calls are made on a file handle and then a `filehandle.readFile()` call is made, the data will be read from the current
- * position till the end of the file. It doesn't always read from the beginning
- * of the file.
- * @since v10.0.0
- * @return Fulfills upon a successful read with the contents of the file. If no encoding is specified (using `options.encoding`), the data is returned as a {Buffer} object. Otherwise, the
- * data will be a string.
- */
- readFile(
- options?:
- | ({ encoding?: null | undefined } & Abortable)
- | null,
- ): Promise<Buffer>;
- /**
- * Asynchronously reads the entire contents of a file. The underlying file will _not_ be closed automatically.
- * The `FileHandle` must have been opened for reading.
- */
- readFile(
- options:
- | ({ encoding: BufferEncoding } & Abortable)
- | BufferEncoding,
- ): Promise<string>;
- /**
- * Asynchronously reads the entire contents of a file. The underlying file will _not_ be closed automatically.
- * The `FileHandle` must have been opened for reading.
- */
- readFile(
- options?:
- | (ObjectEncodingOptions & Abortable)
- | BufferEncoding
- | null,
- ): Promise<string | Buffer>;
- /**
- * Convenience method to create a `readline` interface and stream over the file.
- * See `filehandle.createReadStream()` for the options.
- *
- * ```js
- * import { open } from 'node:fs/promises';
- *
- * const file = await open('./some/file/to/read');
- *
- * for await (const line of file.readLines()) {
- * console.log(line);
- * }
- * ```
- * @since v18.11.0
- */
- readLines(options?: CreateReadStreamOptions): ReadlineInterface;
- /**
- * @since v10.0.0
- * @return Fulfills with an {fs.Stats} for the file.
- */
- stat(
- opts?: StatOptions & {
- bigint?: false | undefined;
- },
- ): Promise<Stats>;
- stat(
- opts: StatOptions & {
- bigint: true;
- },
- ): Promise<BigIntStats>;
- stat(opts?: StatOptions): Promise<Stats | BigIntStats>;
- /**
- * Truncates the file.
- *
- * If the file was larger than `len` bytes, only the first `len` bytes will be
- * retained in the file.
- *
- * The following example retains only the first four bytes of the file:
- *
- * ```js
- * import { open } from 'node:fs/promises';
- *
- * let filehandle = null;
- * try {
- * filehandle = await open('temp.txt', 'r+');
- * await filehandle.truncate(4);
- * } finally {
- * await filehandle?.close();
- * }
- * ```
- *
- * If the file previously was shorter than `len` bytes, it is extended, and the
- * extended part is filled with null bytes (`'\0'`):
- *
- * If `len` is negative then `0` will be used.
- * @since v10.0.0
- * @param [len=0]
- * @return Fulfills with `undefined` upon success.
- */
- truncate(len?: number): Promise<void>;
- /**
- * Change the file system timestamps of the object referenced by the `FileHandle` then fulfills the promise with no arguments upon success.
- * @since v10.0.0
- */
- utimes(atime: TimeLike, mtime: TimeLike): Promise<void>;
- /**
- * Asynchronously writes data to a file, replacing the file if it already exists. `data` can be a string, a buffer, an
- * [AsyncIterable](https://tc39.github.io/ecma262/#sec-asynciterable-interface), or an
- * [Iterable](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Iteration_protocols#The_iterable_protocol) object.
- * The promise is fulfilled with no arguments upon success.
- *
- * If `options` is a string, then it specifies the `encoding`.
- *
- * The `FileHandle` has to support writing.
- *
- * It is unsafe to use `filehandle.writeFile()` multiple times on the same file
- * without waiting for the promise to be fulfilled (or rejected).
- *
- * If one or more `filehandle.write()` calls are made on a file handle and then a`filehandle.writeFile()` call is made, the data will be written from the
- * current position till the end of the file. It doesn't always write from the
- * beginning of the file.
- * @since v10.0.0
- */
- writeFile(
- data: string | Uint8Array,
- options?:
- | (ObjectEncodingOptions & Abortable)
- | BufferEncoding
- | null,
- ): Promise<void>;
- /**
- * Write `buffer` to the file.
- *
- * The promise is fulfilled with an object containing two properties:
- *
- * It is unsafe to use `filehandle.write()` multiple times on the same file
- * without waiting for the promise to be fulfilled (or rejected). For this
- * scenario, use `filehandle.createWriteStream()`.
- *
- * On Linux, positional writes do not work when the file is opened in append mode.
- * The kernel ignores the position argument and always appends the data to
- * the end of the file.
- * @since v10.0.0
- * @param offset The start position from within `buffer` where the data to write begins.
- * @param [length=buffer.byteLength - offset] The number of bytes from `buffer` to write.
- * @param [position='null'] The offset from the beginning of the file where the data from `buffer` should be written. If `position` is not a `number`, the data will be written at the current
- * position. See the POSIX pwrite(2) documentation for more detail.
- */
- write<TBuffer extends Uint8Array>(
- buffer: TBuffer,
- offset?: number | null,
- length?: number | null,
- position?: number | null,
- ): Promise<{
- bytesWritten: number;
- buffer: TBuffer;
- }>;
- write<TBuffer extends Uint8Array>(
- buffer: TBuffer,
- options?: { offset?: number; length?: number; position?: number },
- ): Promise<{
- bytesWritten: number;
- buffer: TBuffer;
- }>;
- write(
- data: string,
- position?: number | null,
- encoding?: BufferEncoding | null,
- ): Promise<{
- bytesWritten: number;
- buffer: string;
- }>;
- /**
- * Write an array of [ArrayBufferView](https://developer.mozilla.org/en-US/docs/Web/API/ArrayBufferView) s to the file.
- *
- * The promise is fulfilled with an object containing a two properties:
- *
- * It is unsafe to call `writev()` multiple times on the same file without waiting
- * for the promise to be fulfilled (or rejected).
- *
- * On Linux, positional writes don't work when the file is opened in append mode.
- * The kernel ignores the position argument and always appends the data to
- * the end of the file.
- * @since v12.9.0
- * @param [position='null'] The offset from the beginning of the file where the data from `buffers` should be written. If `position` is not a `number`, the data will be written at the current
- * position.
- */
- writev(buffers: readonly NodeJS.ArrayBufferView[], position?: number): Promise<WriteVResult>;
- /**
- * Read from a file and write to an array of [ArrayBufferView](https://developer.mozilla.org/en-US/docs/Web/API/ArrayBufferView) s
- * @since v13.13.0, v12.17.0
- * @param [position='null'] The offset from the beginning of the file where the data should be read from. If `position` is not a `number`, the data will be read from the current position.
- * @return Fulfills upon success an object containing two properties:
- */
- readv(buffers: readonly NodeJS.ArrayBufferView[], position?: number): Promise<ReadVResult>;
- /**
- * Closes the file handle after waiting for any pending operation on the handle to
- * complete.
- *
- * ```js
- * import { open } from 'node:fs/promises';
- *
- * let filehandle;
- * try {
- * filehandle = await open('thefile.txt', 'r');
- * } finally {
- * await filehandle?.close();
- * }
- * ```
- * @since v10.0.0
- * @return Fulfills with `undefined` upon success.
- */
- close(): Promise<void>;
- /**
- * An alias for {@link FileHandle.close()}.
- * @since v20.4.0
- */
- [Symbol.asyncDispose](): Promise<void>;
- }
- const constants: typeof fsConstants;
- /**
- * Tests a user's permissions for the file or directory specified by `path`.
- * The `mode` argument is an optional integer that specifies the accessibility
- * checks to be performed. `mode` should be either the value `fs.constants.F_OK` or a mask consisting of the bitwise OR of any of `fs.constants.R_OK`, `fs.constants.W_OK`, and `fs.constants.X_OK`
- * (e.g.`fs.constants.W_OK | fs.constants.R_OK`). Check `File access constants` for
- * possible values of `mode`.
- *
- * If the accessibility check is successful, the promise is fulfilled with no
- * value. If any of the accessibility checks fail, the promise is rejected
- * with an [Error](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Error) object. The following example checks if the file`/etc/passwd` can be read and
- * written by the current process.
- *
- * ```js
- * import { access, constants } from 'node:fs/promises';
- *
- * try {
- * await access('/etc/passwd', constants.R_OK | constants.W_OK);
- * console.log('can access');
- * } catch {
- * console.error('cannot access');
- * }
- * ```
- *
- * Using `fsPromises.access()` to check for the accessibility of a file before
- * calling `fsPromises.open()` is not recommended. Doing so introduces a race
- * condition, since other processes may change the file's state between the two
- * calls. Instead, user code should open/read/write the file directly and handle
- * the error raised if the file is not accessible.
- * @since v10.0.0
- * @param [mode=fs.constants.F_OK]
- * @return Fulfills with `undefined` upon success.
- */
- function access(path: PathLike, mode?: number): Promise<void>;
- /**
- * Asynchronously copies `src` to `dest`. By default, `dest` is overwritten if it
- * already exists.
- *
- * No guarantees are made about the atomicity of the copy operation. If an
- * error occurs after the destination file has been opened for writing, an attempt
- * will be made to remove the destination.
- *
- * ```js
- * import { copyFile, constants } from 'node:fs/promises';
- *
- * try {
- * await copyFile('source.txt', 'destination.txt');
- * console.log('source.txt was copied to destination.txt');
- * } catch {
- * console.error('The file could not be copied');
- * }
- *
- * // By using COPYFILE_EXCL, the operation will fail if destination.txt exists.
- * try {
- * await copyFile('source.txt', 'destination.txt', constants.COPYFILE_EXCL);
- * console.log('source.txt was copied to destination.txt');
- * } catch {
- * console.error('The file could not be copied');
- * }
- * ```
- * @since v10.0.0
- * @param src source filename to copy
- * @param dest destination filename of the copy operation
- * @param [mode=0] Optional modifiers that specify the behavior of the copy operation. It is possible to create a mask consisting of the bitwise OR of two or more values (e.g.
- * `fs.constants.COPYFILE_EXCL | fs.constants.COPYFILE_FICLONE`)
- * @return Fulfills with `undefined` upon success.
- */
- function copyFile(src: PathLike, dest: PathLike, mode?: number): Promise<void>;
- /**
- * Opens a `FileHandle`.
- *
- * Refer to the POSIX [`open(2)`](http://man7.org/linux/man-pages/man2/open.2.html) documentation for more detail.
- *
- * Some characters (`< > : " / \ | ? *`) are reserved under Windows as documented
- * by [Naming Files, Paths, and Namespaces](https://docs.microsoft.com/en-us/windows/desktop/FileIO/naming-a-file). Under NTFS, if the filename contains
- * a colon, Node.js will open a file system stream, as described by [this MSDN page](https://docs.microsoft.com/en-us/windows/desktop/FileIO/using-streams).
- * @since v10.0.0
- * @param [flags='r'] See `support of file system `flags``.
- * @param [mode=0o666] Sets the file mode (permission and sticky bits) if the file is created.
- * @return Fulfills with a {FileHandle} object.
- */
- function open(path: PathLike, flags?: string | number, mode?: Mode): Promise<FileHandle>;
- /**
- * Renames `oldPath` to `newPath`.
- * @since v10.0.0
- * @return Fulfills with `undefined` upon success.
- */
- function rename(oldPath: PathLike, newPath: PathLike): Promise<void>;
- /**
- * Truncates (shortens or extends the length) of the content at `path` to `len` bytes.
- * @since v10.0.0
- * @param [len=0]
- * @return Fulfills with `undefined` upon success.
- */
- function truncate(path: PathLike, len?: number): Promise<void>;
- /**
- * Removes the directory identified by `path`.
- *
- * Using `fsPromises.rmdir()` on a file (not a directory) results in the
- * promise being rejected with an `ENOENT` error on Windows and an `ENOTDIR` error on POSIX.
- *
- * To get a behavior similar to the `rm -rf` Unix command, use `fsPromises.rm()` with options `{ recursive: true, force: true }`.
- * @since v10.0.0
- * @return Fulfills with `undefined` upon success.
- */
- function rmdir(path: PathLike, options?: RmDirOptions): Promise<void>;
- /**
- * Removes files and directories (modeled on the standard POSIX `rm` utility).
- * @since v14.14.0
- * @return Fulfills with `undefined` upon success.
- */
- function rm(path: PathLike, options?: RmOptions): Promise<void>;
- /**
- * Asynchronously creates a directory.
- *
- * The optional `options` argument can be an integer specifying `mode` (permission
- * and sticky bits), or an object with a `mode` property and a `recursive` property indicating whether parent directories should be created. Calling `fsPromises.mkdir()` when `path` is a directory
- * that exists results in a
- * rejection only when `recursive` is false.
- *
- * ```js
- * import { mkdir } from 'node:fs/promises';
- *
- * try {
- * const projectFolder = new URL('./test/project/', import.meta.url);
- * const createDir = await mkdir(projectFolder, { recursive: true });
- *
- * console.log(`created ${createDir}`);
- * } catch (err) {
- * console.error(err.message);
- * }
- * ```
- * @since v10.0.0
- * @return Upon success, fulfills with `undefined` if `recursive` is `false`, or the first directory path created if `recursive` is `true`.
- */
- function mkdir(
- path: PathLike,
- options: MakeDirectoryOptions & {
- recursive: true;
- },
- ): Promise<string | undefined>;
- /**
- * Asynchronous mkdir(2) - create a directory.
- * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
- * @param options Either the file mode, or an object optionally specifying the file mode and whether parent folders
- * should be created. If a string is passed, it is parsed as an octal integer. If not specified, defaults to `0o777`.
- */
- function mkdir(
- path: PathLike,
- options?:
- | Mode
- | (MakeDirectoryOptions & {
- recursive?: false | undefined;
- })
- | null,
- ): Promise<void>;
- /**
- * Asynchronous mkdir(2) - create a directory.
- * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
- * @param options Either the file mode, or an object optionally specifying the file mode and whether parent folders
- * should be created. If a string is passed, it is parsed as an octal integer. If not specified, defaults to `0o777`.
- */
- function mkdir(path: PathLike, options?: Mode | MakeDirectoryOptions | null): Promise<string | undefined>;
- /**
- * Reads the contents of a directory.
- *
- * The optional `options` argument can be a string specifying an encoding, or an
- * object with an `encoding` property specifying the character encoding to use for
- * the filenames. If the `encoding` is set to `'buffer'`, the filenames returned
- * will be passed as `Buffer` objects.
- *
- * If `options.withFileTypes` is set to `true`, the returned array will contain `fs.Dirent` objects.
- *
- * ```js
- * import { readdir } from 'node:fs/promises';
- *
- * try {
- * const files = await readdir(path);
- * for (const file of files)
- * console.log(file);
- * } catch (err) {
- * console.error(err);
- * }
- * ```
- * @since v10.0.0
- * @return Fulfills with an array of the names of the files in the directory excluding `'.'` and `'..'`.
- */
- function readdir(
- path: PathLike,
- options?:
- | (ObjectEncodingOptions & {
- withFileTypes?: false | undefined;
- recursive?: boolean | undefined;
- })
- | BufferEncoding
- | null,
- ): Promise<string[]>;
- /**
- * Asynchronous readdir(3) - read a directory.
- * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
- * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
- */
- function readdir(
- path: PathLike,
- options:
- | {
- encoding: "buffer";
- withFileTypes?: false | undefined;
- recursive?: boolean | undefined;
- }
- | "buffer",
- ): Promise<Buffer[]>;
- /**
- * Asynchronous readdir(3) - read a directory.
- * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
- * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
- */
- function readdir(
- path: PathLike,
- options?:
- | (ObjectEncodingOptions & {
- withFileTypes?: false | undefined;
- recursive?: boolean | undefined;
- })
- | BufferEncoding
- | null,
- ): Promise<string[] | Buffer[]>;
- /**
- * Asynchronous readdir(3) - read a directory.
- * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
- * @param options If called with `withFileTypes: true` the result data will be an array of Dirent.
- */
- function readdir(
- path: PathLike,
- options: ObjectEncodingOptions & {
- withFileTypes: true;
- recursive?: boolean | undefined;
- },
- ): Promise<Dirent[]>;
- /**
- * Asynchronous readdir(3) - read a directory.
- * @param path A path to a directory. If a URL is provided, it must use the `file:` protocol.
- * @param options Must include `withFileTypes: true` and `encoding: 'buffer'`.
- */
- function readdir(
- path: PathLike,
- options: {
- encoding: "buffer";
- withFileTypes: true;
- recursive?: boolean | undefined;
- },
- ): Promise<Dirent<Buffer>[]>;
- /**
- * Reads the contents of the symbolic link referred to by `path`. See the POSIX [`readlink(2)`](http://man7.org/linux/man-pages/man2/readlink.2.html) documentation for more detail. The promise is
- * fulfilled with the`linkString` upon success.
- *
- * The optional `options` argument can be a string specifying an encoding, or an
- * object with an `encoding` property specifying the character encoding to use for
- * the link path returned. If the `encoding` is set to `'buffer'`, the link path
- * returned will be passed as a `Buffer` object.
- * @since v10.0.0
- * @return Fulfills with the `linkString` upon success.
- */
- function readlink(path: PathLike, options?: ObjectEncodingOptions | BufferEncoding | null): Promise<string>;
- /**
- * Asynchronous readlink(2) - read value of a symbolic link.
- * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
- * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
- */
- function readlink(path: PathLike, options: BufferEncodingOption): Promise<Buffer>;
- /**
- * Asynchronous readlink(2) - read value of a symbolic link.
- * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
- * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
- */
- function readlink(path: PathLike, options?: ObjectEncodingOptions | string | null): Promise<string | Buffer>;
- /**
- * Creates a symbolic link.
- *
- * The `type` argument is only used on Windows platforms and can be one of `'dir'`, `'file'`, or `'junction'`. If the `type` argument is not a string, Node.js will
- * autodetect `target` type and use `'file'` or `'dir'`. If the `target` does not
- * exist, `'file'` will be used. Windows junction points require the destination
- * path to be absolute. When using `'junction'`, the `target` argument will
- * automatically be normalized to absolute path. Junction points on NTFS volumes
- * can only point to directories.
- * @since v10.0.0
- * @param [type='null']
- * @return Fulfills with `undefined` upon success.
- */
- function symlink(target: PathLike, path: PathLike, type?: string | null): Promise<void>;
- /**
- * Equivalent to `fsPromises.stat()` unless `path` refers to a symbolic link,
- * in which case the link itself is stat-ed, not the file that it refers to.
- * Refer to the POSIX [`lstat(2)`](http://man7.org/linux/man-pages/man2/lstat.2.html) document for more detail.
- * @since v10.0.0
- * @return Fulfills with the {fs.Stats} object for the given symbolic link `path`.
- */
- function lstat(
- path: PathLike,
- opts?: StatOptions & {
- bigint?: false | undefined;
- },
- ): Promise<Stats>;
- function lstat(
- path: PathLike,
- opts: StatOptions & {
- bigint: true;
- },
- ): Promise<BigIntStats>;
- function lstat(path: PathLike, opts?: StatOptions): Promise<Stats | BigIntStats>;
- /**
- * @since v10.0.0
- * @return Fulfills with the {fs.Stats} object for the given `path`.
- */
- function stat(
- path: PathLike,
- opts?: StatOptions & {
- bigint?: false | undefined;
- },
- ): Promise<Stats>;
- function stat(
- path: PathLike,
- opts: StatOptions & {
- bigint: true;
- },
- ): Promise<BigIntStats>;
- function stat(path: PathLike, opts?: StatOptions): Promise<Stats | BigIntStats>;
- /**
- * @since v19.6.0, v18.15.0
- * @return Fulfills with the {fs.StatFs} object for the given `path`.
- */
- function statfs(
- path: PathLike,
- opts?: StatFsOptions & {
- bigint?: false | undefined;
- },
- ): Promise<StatsFs>;
- function statfs(
- path: PathLike,
- opts: StatFsOptions & {
- bigint: true;
- },
- ): Promise<BigIntStatsFs>;
- function statfs(path: PathLike, opts?: StatFsOptions): Promise<StatsFs | BigIntStatsFs>;
- /**
- * Creates a new link from the `existingPath` to the `newPath`. See the POSIX [`link(2)`](http://man7.org/linux/man-pages/man2/link.2.html) documentation for more detail.
- * @since v10.0.0
- * @return Fulfills with `undefined` upon success.
- */
- function link(existingPath: PathLike, newPath: PathLike): Promise<void>;
- /**
- * If `path` refers to a symbolic link, then the link is removed without affecting
- * the file or directory to which that link refers. If the `path` refers to a file
- * path that is not a symbolic link, the file is deleted. See the POSIX [`unlink(2)`](http://man7.org/linux/man-pages/man2/unlink.2.html) documentation for more detail.
- * @since v10.0.0
- * @return Fulfills with `undefined` upon success.
- */
- function unlink(path: PathLike): Promise<void>;
- /**
- * Changes the permissions of a file.
- * @since v10.0.0
- * @return Fulfills with `undefined` upon success.
- */
- function chmod(path: PathLike, mode: Mode): Promise<void>;
- /**
- * Changes the permissions on a symbolic link.
- *
- * This method is only implemented on macOS.
- * @deprecated Since v10.0.0
- * @return Fulfills with `undefined` upon success.
- */
- function lchmod(path: PathLike, mode: Mode): Promise<void>;
- /**
- * Changes the ownership on a symbolic link.
- * @since v10.0.0
- * @return Fulfills with `undefined` upon success.
- */
- function lchown(path: PathLike, uid: number, gid: number): Promise<void>;
- /**
- * Changes the access and modification times of a file in the same way as `fsPromises.utimes()`, with the difference that if the path refers to a
- * symbolic link, then the link is not dereferenced: instead, the timestamps of
- * the symbolic link itself are changed.
- * @since v14.5.0, v12.19.0
- * @return Fulfills with `undefined` upon success.
- */
- function lutimes(path: PathLike, atime: TimeLike, mtime: TimeLike): Promise<void>;
- /**
- * Changes the ownership of a file.
- * @since v10.0.0
- * @return Fulfills with `undefined` upon success.
- */
- function chown(path: PathLike, uid: number, gid: number): Promise<void>;
- /**
- * Change the file system timestamps of the object referenced by `path`.
- *
- * The `atime` and `mtime` arguments follow these rules:
- *
- * * Values can be either numbers representing Unix epoch time, `Date`s, or a
- * numeric string like `'123456789.0'`.
- * * If the value can not be converted to a number, or is `NaN`, `Infinity`, or `-Infinity`, an `Error` will be thrown.
- * @since v10.0.0
- * @return Fulfills with `undefined` upon success.
- */
- function utimes(path: PathLike, atime: TimeLike, mtime: TimeLike): Promise<void>;
- /**
- * Determines the actual location of `path` using the same semantics as the `fs.realpath.native()` function.
- *
- * Only paths that can be converted to UTF8 strings are supported.
- *
- * The optional `options` argument can be a string specifying an encoding, or an
- * object with an `encoding` property specifying the character encoding to use for
- * the path. If the `encoding` is set to `'buffer'`, the path returned will be
- * passed as a `Buffer` object.
- *
- * On Linux, when Node.js is linked against musl libc, the procfs file system must
- * be mounted on `/proc` in order for this function to work. Glibc does not have
- * this restriction.
- * @since v10.0.0
- * @return Fulfills with the resolved path upon success.
- */
- function realpath(path: PathLike, options?: ObjectEncodingOptions | BufferEncoding | null): Promise<string>;
- /**
- * Asynchronous realpath(3) - return the canonicalized absolute pathname.
- * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
- * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
- */
- function realpath(path: PathLike, options: BufferEncodingOption): Promise<Buffer>;
- /**
- * Asynchronous realpath(3) - return the canonicalized absolute pathname.
- * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
- * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
- */
- function realpath(
- path: PathLike,
- options?: ObjectEncodingOptions | BufferEncoding | null,
- ): Promise<string | Buffer>;
- /**
- * Creates a unique temporary directory. A unique directory name is generated by
- * appending six random characters to the end of the provided `prefix`. Due to
- * platform inconsistencies, avoid trailing `X` characters in `prefix`. Some
- * platforms, notably the BSDs, can return more than six random characters, and
- * replace trailing `X` characters in `prefix` with random characters.
- *
- * The optional `options` argument can be a string specifying an encoding, or an
- * object with an `encoding` property specifying the character encoding to use.
- *
- * ```js
- * import { mkdtemp } from 'node:fs/promises';
- * import { join } from 'node:path';
- * import { tmpdir } from 'node:os';
- *
- * try {
- * await mkdtemp(join(tmpdir(), 'foo-'));
- * } catch (err) {
- * console.error(err);
- * }
- * ```
- *
- * The `fsPromises.mkdtemp()` method will append the six randomly selected
- * characters directly to the `prefix` string. For instance, given a directory `/tmp`, if the intention is to create a temporary directory _within_ `/tmp`, the `prefix` must end with a trailing
- * platform-specific path separator
- * (`import { sep } from 'node:path'`).
- * @since v10.0.0
- * @return Fulfills with a string containing the file system path of the newly created temporary directory.
- */
- function mkdtemp(prefix: string, options?: ObjectEncodingOptions | BufferEncoding | null): Promise<string>;
- /**
- * Asynchronously creates a unique temporary directory.
- * Generates six random characters to be appended behind a required `prefix` to create a unique temporary directory.
- * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
- */
- function mkdtemp(prefix: string, options: BufferEncodingOption): Promise<Buffer>;
- /**
- * Asynchronously creates a unique temporary directory.
- * Generates six random characters to be appended behind a required `prefix` to create a unique temporary directory.
- * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
- */
- function mkdtemp(prefix: string, options?: ObjectEncodingOptions | BufferEncoding | null): Promise<string | Buffer>;
- /**
- * Asynchronously writes data to a file, replacing the file if it already exists. `data` can be a string, a buffer, an
- * [AsyncIterable](https://tc39.github.io/ecma262/#sec-asynciterable-interface), or an
- * [Iterable](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Iteration_protocols#The_iterable_protocol) object.
- *
- * The `encoding` option is ignored if `data` is a buffer.
- *
- * If `options` is a string, then it specifies the encoding.
- *
- * The `mode` option only affects the newly created file. See `fs.open()` for more details.
- *
- * Any specified `FileHandle` has to support writing.
- *
- * It is unsafe to use `fsPromises.writeFile()` multiple times on the same file
- * without waiting for the promise to be settled.
- *
- * Similarly to `fsPromises.readFile` \- `fsPromises.writeFile` is a convenience
- * method that performs multiple `write` calls internally to write the buffer
- * passed to it. For performance sensitive code consider using `fs.createWriteStream()` or `filehandle.createWriteStream()`.
- *
- * It is possible to use an `AbortSignal` to cancel an `fsPromises.writeFile()`.
- * Cancelation is "best effort", and some amount of data is likely still
- * to be written.
- *
- * ```js
- * import { writeFile } from 'node:fs/promises';
- * import { Buffer } from 'node:buffer';
- *
- * try {
- * const controller = new AbortController();
- * const { signal } = controller;
- * const data = new Uint8Array(Buffer.from('Hello Node.js'));
- * const promise = writeFile('message.txt', data, { signal });
- *
- * // Abort the request before the promise settles.
- * controller.abort();
- *
- * await promise;
- * } catch (err) {
- * // When a request is aborted - err is an AbortError
- * console.error(err);
- * }
- * ```
- *
- * Aborting an ongoing request does not abort individual operating
- * system requests but rather the internal buffering `fs.writeFile` performs.
- * @since v10.0.0
- * @param file filename or `FileHandle`
- * @return Fulfills with `undefined` upon success.
- */
- function writeFile(
- file: PathLike | FileHandle,
- data:
- | string
- | NodeJS.ArrayBufferView
- | Iterable<string | NodeJS.ArrayBufferView>
- | AsyncIterable<string | NodeJS.ArrayBufferView>
- | Stream,
- options?:
- | (ObjectEncodingOptions & {
- mode?: Mode | undefined;
- flag?: OpenMode | undefined;
- /**
- * If all data is successfully written to the file, and `flush`
- * is `true`, `filehandle.sync()` is used to flush the data.
- * @default false
- */
- flush?: boolean | undefined;
- } & Abortable)
- | BufferEncoding
- | null,
- ): Promise<void>;
- /**
- * Asynchronously append data to a file, creating the file if it does not yet
- * exist. `data` can be a string or a `Buffer`.
- *
- * If `options` is a string, then it specifies the `encoding`.
- *
- * The `mode` option only affects the newly created file. See `fs.open()` for more details.
- *
- * The `path` may be specified as a `FileHandle` that has been opened
- * for appending (using `fsPromises.open()`).
- * @since v10.0.0
- * @param path filename or {FileHandle}
- * @return Fulfills with `undefined` upon success.
- */
- function appendFile(
- path: PathLike | FileHandle,
- data: string | Uint8Array,
- options?: (ObjectEncodingOptions & FlagAndOpenMode & { flush?: boolean | undefined }) | BufferEncoding | null,
- ): Promise<void>;
- /**
- * Asynchronously reads the entire contents of a file.
- *
- * If no encoding is specified (using `options.encoding`), the data is returned
- * as a `Buffer` object. Otherwise, the data will be a string.
- *
- * If `options` is a string, then it specifies the encoding.
- *
- * When the `path` is a directory, the behavior of `fsPromises.readFile()` is
- * platform-specific. On macOS, Linux, and Windows, the promise will be rejected
- * with an error. On FreeBSD, a representation of the directory's contents will be
- * returned.
- *
- * An example of reading a `package.json` file located in the same directory of the
- * running code:
- *
- * ```js
- * import { readFile } from 'node:fs/promises';
- * try {
- * const filePath = new URL('./package.json', import.meta.url);
- * const contents = await readFile(filePath, { encoding: 'utf8' });
- * console.log(contents);
- * } catch (err) {
- * console.error(err.message);
- * }
- * ```
- *
- * It is possible to abort an ongoing `readFile` using an `AbortSignal`. If a
- * request is aborted the promise returned is rejected with an `AbortError`:
- *
- * ```js
- * import { readFile } from 'node:fs/promises';
- *
- * try {
- * const controller = new AbortController();
- * const { signal } = controller;
- * const promise = readFile(fileName, { signal });
- *
- * // Abort the request before the promise settles.
- * controller.abort();
- *
- * await promise;
- * } catch (err) {
- * // When a request is aborted - err is an AbortError
- * console.error(err);
- * }
- * ```
- *
- * Aborting an ongoing request does not abort individual operating
- * system requests but rather the internal buffering `fs.readFile` performs.
- *
- * Any specified `FileHandle` has to support reading.
- * @since v10.0.0
- * @param path filename or `FileHandle`
- * @return Fulfills with the contents of the file.
- */
- function readFile(
- path: PathLike | FileHandle,
- options?:
- | ({
- encoding?: null | undefined;
- flag?: OpenMode | undefined;
- } & Abortable)
- | null,
- ): Promise<Buffer>;
- /**
- * Asynchronously reads the entire contents of a file.
- * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
- * If a `FileHandle` is provided, the underlying file will _not_ be closed automatically.
- * @param options An object that may contain an optional flag.
- * If a flag is not provided, it defaults to `'r'`.
- */
- function readFile(
- path: PathLike | FileHandle,
- options:
- | ({
- encoding: BufferEncoding;
- flag?: OpenMode | undefined;
- } & Abortable)
- | BufferEncoding,
- ): Promise<string>;
- /**
- * Asynchronously reads the entire contents of a file.
- * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
- * If a `FileHandle` is provided, the underlying file will _not_ be closed automatically.
- * @param options An object that may contain an optional flag.
- * If a flag is not provided, it defaults to `'r'`.
- */
- function readFile(
- path: PathLike | FileHandle,
- options?:
- | (
- & ObjectEncodingOptions
- & Abortable
- & {
- flag?: OpenMode | undefined;
- }
- )
- | BufferEncoding
- | null,
- ): Promise<string | Buffer>;
- /**
- * Asynchronously open a directory for iterative scanning. See the POSIX [`opendir(3)`](http://man7.org/linux/man-pages/man3/opendir.3.html) documentation for more detail.
- *
- * Creates an `fs.Dir`, which contains all further functions for reading from
- * and cleaning up the directory.
- *
- * The `encoding` option sets the encoding for the `path` while opening the
- * directory and subsequent read operations.
- *
- * Example using async iteration:
- *
- * ```js
- * import { opendir } from 'node:fs/promises';
- *
- * try {
- * const dir = await opendir('./');
- * for await (const dirent of dir)
- * console.log(dirent.name);
- * } catch (err) {
- * console.error(err);
- * }
- * ```
- *
- * When using the async iterator, the `fs.Dir` object will be automatically
- * closed after the iterator exits.
- * @since v12.12.0
- * @return Fulfills with an {fs.Dir}.
- */
- function opendir(path: PathLike, options?: OpenDirOptions): Promise<Dir>;
- /**
- * Returns an async iterator that watches for changes on `filename`, where `filename`is either a file or a directory.
- *
- * ```js
- * import { watch } from 'node:fs/promises';
- *
- * const ac = new AbortController();
- * const { signal } = ac;
- * setTimeout(() => ac.abort(), 10000);
- *
- * (async () => {
- * try {
- * const watcher = watch(__filename, { signal });
- * for await (const event of watcher)
- * console.log(event);
- * } catch (err) {
- * if (err.name === 'AbortError')
- * return;
- * throw err;
- * }
- * })();
- * ```
- *
- * On most platforms, `'rename'` is emitted whenever a filename appears or
- * disappears in the directory.
- *
- * All the `caveats` for `fs.watch()` also apply to `fsPromises.watch()`.
- * @since v15.9.0, v14.18.0
- * @return of objects with the properties:
- */
- function watch(
- filename: PathLike,
- options:
- | (WatchOptions & {
- encoding: "buffer";
- })
- | "buffer",
- ): AsyncIterable<FileChangeInfo<Buffer>>;
- /**
- * Watch for changes on `filename`, where `filename` is either a file or a directory, returning an `FSWatcher`.
- * @param filename A path to a file or directory. If a URL is provided, it must use the `file:` protocol.
- * @param options Either the encoding for the filename provided to the listener, or an object optionally specifying encoding, persistent, and recursive options.
- * If `encoding` is not supplied, the default of `'utf8'` is used.
- * If `persistent` is not supplied, the default of `true` is used.
- * If `recursive` is not supplied, the default of `false` is used.
- */
- function watch(filename: PathLike, options?: WatchOptions | BufferEncoding): AsyncIterable<FileChangeInfo<string>>;
- /**
- * Watch for changes on `filename`, where `filename` is either a file or a directory, returning an `FSWatcher`.
- * @param filename A path to a file or directory. If a URL is provided, it must use the `file:` protocol.
- * @param options Either the encoding for the filename provided to the listener, or an object optionally specifying encoding, persistent, and recursive options.
- * If `encoding` is not supplied, the default of `'utf8'` is used.
- * If `persistent` is not supplied, the default of `true` is used.
- * If `recursive` is not supplied, the default of `false` is used.
- */
- function watch(
- filename: PathLike,
- options: WatchOptions | string,
- ): AsyncIterable<FileChangeInfo<string>> | AsyncIterable<FileChangeInfo<Buffer>>;
- /**
- * Asynchronously copies the entire directory structure from `src` to `dest`,
- * including subdirectories and files.
- *
- * When copying a directory to another directory, globs are not supported and
- * behavior is similar to `cp dir1/ dir2/`.
- * @since v16.7.0
- * @experimental
- * @param src source path to copy.
- * @param dest destination path to copy to.
- * @return Fulfills with `undefined` upon success.
- */
- function cp(source: string | URL, destination: string | URL, opts?: CopyOptions): Promise<void>;
- /**
- * Retrieves the files matching the specified pattern.
- */
- function glob(pattern: string | string[]): NodeJS.AsyncIterator<string>;
- function glob(
- pattern: string | string[],
- opt: GlobOptionsWithFileTypes,
- ): NodeJS.AsyncIterator<Dirent>;
- function glob(
- pattern: string | string[],
- opt: GlobOptionsWithoutFileTypes,
- ): NodeJS.AsyncIterator<string>;
- function glob(
- pattern: string | string[],
- opt: GlobOptions,
- ): NodeJS.AsyncIterator<Dirent | string>;
- }
- declare module "node:fs/promises" {
- export * from "fs/promises";
- }
|