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@stdlib/fs-resolve-parent-path

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@stdlib/fs-resolve-parent-path

Resolve a path by walking parent directories.


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About stdlib...

We believe in a future in which the web is a preferred environment for numerical computation. To help realize this future, we've built stdlib. stdlib is a standard library, with an emphasis on numerical and scientific computation, written in JavaScript (and C) for execution in browsers and in Node.js.

The library is fully decomposable, being architected in such a way that you can swap out and mix and match APIs and functionality to cater to your exact preferences and use cases.

When you use stdlib, you can be absolutely certain that you are using the most thorough, rigorous, well-written, studied, documented, tested, measured, and high-quality code out there.

To join us in bringing numerical computing to the web, get started by checking us out on GitHub, and please consider financially supporting stdlib. We greatly appreciate your continued support!

Resolve Parent Path

NPM version Build Status Coverage Status

Resolve a path by walking parent directories.

Installation

npm install @stdlib/fs-resolve-parent-path

Usage

var resolveParentPath = require( '@stdlib/fs-resolve-parent-path' );

resolveParentPath( path[, options], clbk )

Asynchronously resolves a path by walking parent directories.

resolveParentPath( 'package.json', onPath );

function onPath( error, path ) {
    if ( error ) {
        throw error;
    }
    console.log( path );
    // => '...'
}

The function accepts the following options:

  • dir: base directory from which to begin walking. May be either an absolute path or a path relative to the current working directory.

By default, the function begins walking from the current working directory. To specify an alternative directory, set the dir option.

var opts = {
    'dir': __dirname
};
resolveParentPath( 'package.json', opts, onPath );

function onPath( error, path ) {
    if ( error ) {
        throw error;
    }
    console.log( path );
    // => '...'
}
resolveParentPath.sync( path[, options] )

Synchronously resolves a path by walking parent directories.

var path = resolveParentPath.sync( 'package.json' );
// returns '...'

The function accepts the same options as resolveParentPath().

Notes

  • If unable to resolve a path, both functions return null.
  • This implementation is not similar in functionality to core path.resolve. The latter performs string manipulation to generate a full path. This implementation walks parent directories to perform a search, thereby touching the file system. Accordingly, this implementation resolves a real absolute file path and is intended for use when a target's location in a parent directory is unknown relative to a child directory; e.g., when wanting to find a package root from deep within a package directory.

Examples

var resolveParentPath = require( '@stdlib/fs-resolve-parent-path' );

var opts = {
    'dir': __dirname
};

/* Sync */

var out = resolveParentPath.sync( 'package.json', opts );
// returns '...'

out = resolveParentPath.sync( 'non_existent_basename' );
// returns null

/* Async */

resolveParentPath( 'package.json', opts, onPath );
resolveParentPath( './../non_existent_path', onPath );

function onPath( error, path ) {
    if ( error ) {
        throw error;
    }
    console.log( path );
}

See Also


Notice

This package is part of stdlib, a standard library for JavaScript and Node.js, with an emphasis on numerical and scientific computing. The library provides a collection of robust, high performance libraries for mathematics, statistics, streams, utilities, and more.

For more information on the project, filing bug reports and feature requests, and guidance on how to develop stdlib, see the main project repository.

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License

See LICENSE.

Copyright © 2016-2024. The Stdlib Authors.

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Package last updated on 27 Jul 2024

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