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Readdir-Glob

Recursive version of fs.readdir wih stream API and glob filtering. Uses the minimatch library to do its matching.

Requires Node.js 10.0 or later.

Performances

Compared to glob, readdir-glob is memory efficient: no matter the file system size, or the number of returned files, the memory usage is constant.

The CPU cost is proportional to the number of files in root folder, minus the number files in options.skip folders.

Advice: For better performances use options.skip to restrict the search as much as possible.

Usage

Install with npm

npm i readdir-glob

const readdirGlob = require('readdir-glob');
const globber = readdirGlob('.', {pattern: '**/*.js'});
globber.on('match', match => {
    // m.relative: relative path of the matched file
    // m.absolute: absolute path of the matched file
    // m.stat: stat of the matched file (only if stat:true option is used)
});
globber.on('error', err => {
    console.error('fatal error', err);
});
globber.on('end', (m) => {
    console.log('done');
});

readdirGlob(root, [options])

root {String} Path to be read recursively, default: '.'
options {Object} Options, default: {}

Returns a EventEmitter reading given root recursively.

Properties

options: The options object passed in.
paused: Boolean which is set to true when calling pause().
aborted Boolean which is set to true when calling abort(). There is no way at this time to continue a glob search after aborting.

Events

match: Every time a match is found, this is emitted with the specific thing that matched.
end: When the matching is finished, this is emitted with all the matches found.
error: Emitted when an unexpected error is encountered.

Methods

pause(): Temporarily stop the search
resume(): Resume the search
abort(): Stop the search forever

Options

pattern: Glob pattern or Array of Glob patterns to match the found files with. A file has to match at least one of the provided patterns to be returned.
ignore: Glob pattern or Array of Glob patterns to exclude matches. If a file or a folder matches at least one of the provided patterns, it's not returned. It doesn't prevent files from folder content to be returned. Note: ignore patterns are always in dot:true mode.
skip: Glob pattern or Array of Glob patterns to exclude folders. If a folder matches one of the provided patterns, it's not returned, and it's not explored: this prevents any of its children to be returned. Note: skip patterns are always in dot:true mode.
mark: Add a / character to directory matches.
stat: Set to true to stat all results. This reduces performance.
silent: When an unusual error is encountered when attempting to read a directory, a warning will be printed to stderr. Set the silent option to true to suppress these warnings.
nodir: Do not match directories, only files.
follow: Follow symlinked directories. Note that requires to stat all results, and so reduces performance.

The following options apply only if pattern option is set, and are forwarded to minimatch:

dot: Allow pattern to match filenames starting with a period, even if the pattern does not explicitly have a period in that spot.
noglobstar: Disable ** matching against multiple folder names.
nocase: Perform a case-insensitive match. Note: on case-insensitive filesystems, non-magic patterns will match by default, since stat and readdir will not raise errors.
matchBase: Perform a basename-only match if the pattern does not contain any slash characters. That is, *.js would be treated as equivalent to **/*.js, matching all js files in all directories.

References

Unit-test set is based on node-glob tests.

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