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122 lines
6.8 KiB
122 lines
6.8 KiB
# readdirp [](https://github.com/paulmillr/readdirp) |
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Recursive version of [fs.readdir](https://nodejs.org/api/fs.html#fs_fs_readdir_path_options_callback). Exposes a **stream API** and a **promise API**. |
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```sh |
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npm install readdirp |
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``` |
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```javascript |
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const readdirp = require('readdirp'); |
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// Use streams to achieve small RAM & CPU footprint. |
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// 1) Streams example with for-await. |
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for await (const entry of readdirp('.')) { |
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const {path} = entry; |
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console.log(`${JSON.stringify({path})}`); |
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} |
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// 2) Streams example, non for-await. |
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// Print out all JS files along with their size within the current folder & subfolders. |
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readdirp('.', {fileFilter: '*.js', alwaysStat: true}) |
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.on('data', (entry) => { |
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const {path, stats: {size}} = entry; |
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console.log(`${JSON.stringify({path, size})}`); |
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}) |
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// Optionally call stream.destroy() in `warn()` in order to abort and cause 'close' to be emitted |
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.on('warn', error => console.error('non-fatal error', error)) |
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.on('error', error => console.error('fatal error', error)) |
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.on('end', () => console.log('done')); |
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// 3) Promise example. More RAM and CPU than streams / for-await. |
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const files = await readdirp.promise('.'); |
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console.log(files.map(file => file.path)); |
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// Other options. |
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readdirp('test', { |
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fileFilter: '*.js', |
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directoryFilter: ['!.git', '!*modules'] |
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// directoryFilter: (di) => di.basename.length === 9 |
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type: 'files_directories', |
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depth: 1 |
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}); |
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``` |
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For more examples, check out `examples` directory. |
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## API |
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`const stream = readdirp(root[, options])` — **Stream API** |
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- Reads given root recursively and returns a `stream` of [entry infos](#entryinfo) |
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- Optionally can be used like `for await (const entry of stream)` with node.js 10+ (`asyncIterator`). |
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- `on('data', (entry) => {})` [entry info](#entryinfo) for every file / dir. |
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- `on('warn', (error) => {})` non-fatal `Error` that prevents a file / dir from being processed. Example: inaccessible to the user. |
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- `on('error', (error) => {})` fatal `Error` which also ends the stream. Example: illegal options where passed. |
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- `on('end')` — we are done. Called when all entries were found and no more will be emitted. |
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- `on('close')` — stream is destroyed via `stream.destroy()`. |
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Could be useful if you want to manually abort even on a non fatal error. |
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At that point the stream is no longer `readable` and no more entries, warning or errors are emitted |
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- To learn more about streams, consult the very detailed [nodejs streams documentation](https://nodejs.org/api/stream.html) |
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or the [stream-handbook](https://github.com/substack/stream-handbook) |
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`const entries = await readdirp.promise(root[, options])` — **Promise API**. Returns a list of [entry infos](#entryinfo). |
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First argument is awalys `root`, path in which to start reading and recursing into subdirectories. |
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### options |
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- `fileFilter: ["*.js"]`: filter to include or exclude files. A `Function`, Glob string or Array of glob strings. |
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- **Function**: a function that takes an entry info as a parameter and returns true to include or false to exclude the entry |
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- **Glob string**: a string (e.g., `*.js`) which is matched using [picomatch](https://github.com/micromatch/picomatch), so go there for more |
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information. Globstars (`**`) are not supported since specifying a recursive pattern for an already recursive function doesn't make sense. Negated globs (as explained in the minimatch documentation) are allowed, e.g., `!*.txt` matches everything but text files. |
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- **Array of glob strings**: either need to be all inclusive or all exclusive (negated) patterns otherwise an error is thrown. |
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`['*.json', '*.js']` includes all JavaScript and Json files. |
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`['!.git', '!node_modules']` includes all directories except the '.git' and 'node_modules'. |
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- Directories that do not pass a filter will not be recursed into. |
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- `directoryFilter: ['!.git']`: filter to include/exclude directories found and to recurse into. Directories that do not pass a filter will not be recursed into. |
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- `depth: 5`: depth at which to stop recursing even if more subdirectories are found |
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- `type: 'files'`: determines if data events on the stream should be emitted for `'files'` (default), `'directories'`, `'files_directories'`, or `'all'`. Setting to `'all'` will also include entries for other types of file descriptors like character devices, unix sockets and named pipes. |
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- `alwaysStat: false`: always return `stats` property for every file. Default is `false`, readdirp will return `Dirent` entries. Setting it to `true` can double readdir execution time - use it only when you need file `size`, `mtime` etc. Cannot be enabled on node <10.10.0. |
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- `lstat: false`: include symlink entries in the stream along with files. When `true`, `fs.lstat` would be used instead of `fs.stat` |
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### `EntryInfo` |
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Has the following properties: |
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- `path: 'assets/javascripts/react.js'`: path to the file/directory (relative to given root) |
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- `fullPath: '/Users/dev/projects/app/assets/javascripts/react.js'`: full path to the file/directory found |
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- `basename: 'react.js'`: name of the file/directory |
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- `dirent: fs.Dirent`: built-in [dir entry object](https://nodejs.org/api/fs.html#fs_class_fs_dirent) - only with `alwaysStat: false` |
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- `stats: fs.Stats`: built in [stat object](https://nodejs.org/api/fs.html#fs_class_fs_stats) - only with `alwaysStat: true` |
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## Changelog |
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- 3.5 (Oct 13, 2020) disallows recursive directory-based symlinks. |
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Before, it could have entered infinite loop. |
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- 3.4 (Mar 19, 2020) adds support for directory-based symlinks. |
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- 3.3 (Dec 6, 2019) stabilizes RAM consumption and enables perf management with `highWaterMark` option. Fixes race conditions related to `for-await` looping. |
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- 3.2 (Oct 14, 2019) improves performance by 250% and makes streams implementation more idiomatic. |
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- 3.1 (Jul 7, 2019) brings `bigint` support to `stat` output on Windows. This is backwards-incompatible for some cases. Be careful. It you use it incorrectly, you'll see "TypeError: Cannot mix BigInt and other types, use explicit conversions". |
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- 3.0 brings huge performance improvements and stream backpressure support. |
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- Upgrading 2.x to 3.x: |
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- Signature changed from `readdirp(options)` to `readdirp(root, options)` |
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- Replaced callback API with promise API. |
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- Renamed `entryType` option to `type` |
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- Renamed `entryType: 'both'` to `'files_directories'` |
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- `EntryInfo` |
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- Renamed `stat` to `stats` |
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- Emitted only when `alwaysStat: true` |
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- `dirent` is emitted instead of `stats` by default with `alwaysStat: false` |
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- Renamed `name` to `basename` |
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- Removed `parentDir` and `fullParentDir` properties |
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- Supported node.js versions: |
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- 3.x: node 8+ |
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- 2.x: node 0.6+ |
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## License |
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Copyright (c) 2012-2019 Thorsten Lorenz, Paul Miller (<https://paulmillr.com>) |
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MIT License, see [LICENSE](LICENSE) file.
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