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Resolve Parent Path

Resolve a path by walking parent directories.

Installation

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

Alternatively,

• To load the package in a website via a script tag without installation and bundlers, use the ES Module available on the esm branch (see README).
• If you are using Deno, visit the deno branch (see README for usage intructions).
• For use in Observable, or in browser/node environments, use the Universal Module Definition (UMD) build available on the umd branch (see README).
• To use as a general utility for the command line, install the corresponding CLI package globally.

The branches.md file summarizes the available branches and displays a diagram illustrating their relationships.

To view installation and usage instructions specific to each branch build, be sure to explicitly navigate to the respective README files on each branch, as linked to above.

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 );
}

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CLI

Installation

To use as a general utility, install the CLI package globally

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

Usage

Usage: resolve-parent-path [options] <path>

Options:

  -h,    --help                Print this message.
  -V,    --version             Print the package version.
         --dir dir             Base search directory.

Examples

$ resolve-parent-path package.json

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See Also

• @stdlib/fs-resolve-parent-path-by: resolve a path according to a predicate function by walking parent directories.

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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.

Community

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License

See LICENSE.

Copyright

Copyright © 2016-2024. The Stdlib Authors.