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/opt/canhelp/node_modules/@nodelib/fs.walk/README.md
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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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