webdav/sync/react/cockpit-profinet/node_modules/@nodelib/fs.walk - 志元云盘

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# @nodelib/fs.walk

> A library for efficiently walking a directory recursively.

## :bulb: Highlights

* :moneybag: Returns useful information: `name`, `path`, `dirent` and `stats` (optional).
* :rocket: On Node.js 10.10+ uses the mechanism without additional calls to determine the entry type for performance reasons. See [`old` and `modern` mode](https://github.com/nodelib/nodelib/blob/master/packages/fs/fs.scandir/README.md#old-and-modern-mode).
* :gear: Built-in directories/files and error filtering system.
* :link: Can safely work with broken symbolic links.

## Install

```console
npm install @nodelib/fs.walk
```

## Usage

```ts
import * as fsWalk from '@nodelib/fs.walk';

fsWalk.walk('path', (error, entries) => { /* … */ });
```

## API

### .walk(path, [optionsOrSettings], callback)

Reads the directory recursively and asynchronously. Requires a callback function.

> :book: If you want to use the Promise API, use `util.promisify`.

```ts
fsWalk.walk('path', (error, entries) => { /* … */ });
fsWalk.walk('path', {}, (error, entries) => { /* … */ });
fsWalk.walk('path', new fsWalk.Settings(), (error, entries) => { /* … */ });
```

### .walkStream(path, [optionsOrSettings])

Reads the directory recursively and asynchronously. [Readable Stream](https://nodejs.org/dist/latest-v12.x/docs/api/stream.html#stream_readable_streams) is used as a provider.

```ts
const stream = fsWalk.walkStream('path');
const stream = fsWalk.walkStream('path', {});
const stream = fsWalk.walkStream('path', new fsWalk.Settings());
```

### .walkSync(path, [optionsOrSettings])

Reads the directory recursively and synchronously. Returns an array of entries.

```ts
const entries = fsWalk.walkSync('path');
const entries = fsWalk.walkSync('path', {});
const entries = fsWalk.walkSync('path', new fsWalk.Settings());
```

#### path

* Required: `true`
* Type: `string | Buffer | URL`

A path to a file. If a URL is provided, it must use the `file:` protocol.

#### optionsOrSettings

* Required: `false`
* Type: `Options | Settings`
* Default: An instance of `Settings` class

An [`Options`](#options) object or an instance of [`Settings`](#settings) class.

> :book: When you pass a plain object, an instance of the `Settings` class will be created automatically. If you plan to call the method frequently, use a pre-created instance of the `Settings` class.

### Settings([options])

A class of full settings of the package.

```ts
const settings = new fsWalk.Settings({ followSymbolicLinks: true });

const entries = fsWalk.walkSync('path', settings);
```

## Entry

* `name` — The name of the entry (`unknown.txt`).
* `path` — The path of the entry relative to call directory (`root/unknown.txt`).
* `dirent` — An instance of [`fs.Dirent`](./src/types/index.ts) class.
* [`stats`] — An instance of `fs.Stats` class.

## Options

### basePath

* Type: `string`
* Default: `undefined`

By default, all paths are built relative to the root path. You can use this option to set custom root path.

In the example below we read the files from the `root` directory, but in the results the root path will be `custom`.

```ts
fsWalk.walkSync('root'); // → ['root/file.txt']
fsWalk.walkSync('root', { basePath: 'custom' }); // → ['custom/file.txt']
```

### concurrency

* Type: `number`
* Default: `Infinity`

The maximum number of concurrent calls to `fs.readdir`.

> :book: The higher the number, the higher performance and the load on the File System. If you want to read in quiet mode, set the value to `4 * os.cpus().length` (4 is default size of [thread pool work scheduling](http://docs.libuv.org/en/v1.x/threadpool.html#thread-pool-work-scheduling)).

### deepFilter

* Type: [`DeepFilterFunction`](./src/settings.ts)
* Default: `undefined`

A function that indicates whether the directory will be read deep or not.

```ts
// Skip all directories that starts with `node_modules`
const filter: DeepFilterFunction = (entry) => !entry.path.startsWith('node_modules');
```

### entryFilter

* Type: [`EntryFilterFunction`](./src/settings.ts)
* Default: `undefined`

A function that indicates whether the entry will be included to results or not.

```ts
// Exclude all `.js` files from results
const filter: EntryFilterFunction = (entry) => !entry.name.endsWith('.js');
```

### errorFilter

* Type: [`ErrorFilterFunction`](./src/settings.ts)
* Default: `undefined`

A function that allows you to skip errors that occur when reading directories.

For example, you can skip `ENOENT` errors if required:

```ts
// Skip all ENOENT errors
const filter: ErrorFilterFunction = (error) => error.code == 'ENOENT';
```

### stats

* Type: `boolean`
* Default: `false`

Adds an instance of `fs.Stats` class to the [`Entry`](#entry).

> :book: Always use `fs.readdir` with additional `fs.lstat/fs.stat` calls to determine the entry type.

### followSymbolicLinks

* Type: `boolean`
* Default: `false`

Follow symbolic links or not. Call `fs.stat` on symbolic link if `true`.

### `throwErrorOnBrokenSymbolicLink`

* Type: `boolean`
* Default: `true`

Throw an error when symbolic link is broken if `true` or safely return `lstat` call if `false`.

### `pathSegmentSeparator`

* Type: `string`
* Default: `path.sep`

By default, this package uses the correct path separator for your OS (`\` on Windows, `/` on Unix-like systems). But you can set this option to any separator character(s) that you want to use instead.

### `fs`

* Type: `FileSystemAdapter`
* Default: A default FS methods

By default, the built-in Node.js module (`fs`) is used to work with the file system. You can replace any method with your own.

```ts
interface FileSystemAdapter {
	lstat: typeof fs.lstat;
	stat: typeof fs.stat;
	lstatSync: typeof fs.lstatSync;
	statSync: typeof fs.statSync;
	readdir: typeof fs.readdir;
	readdirSync: typeof fs.readdirSync;
}

const settings = new fsWalk.Settings({
	fs: { lstat: fakeLstat }
});
```

## Changelog

See the [Releases section of our GitHub project](https://github.com/nodelib/nodelib/releases) for changelog for each release version.

## License

This software is released under the terms of the MIT license.

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