resolveParentPaths

Resolve paths from a set of paths by walking parent directories.

Usage

var resolveParentPaths = require( '@stdlib/fs/resolve-parent-paths' );

resolveParentPaths( paths[, options], clbk )

Asynchronously resolves paths from a set of paths by walking parent directories.

resolveParentPaths( [ 'package.json', 'package-lock.json' ], onPaths );

function onPaths( error, paths ) {
    if ( error ) {
        throw error;
    }
    console.log( paths );
    // => [...]
}

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.
mode: mode of operation. The following modes are supported:
- first: return the first resolved path.
- some: return one or more paths resolved within the first directory level containing a match.
- all: return all resolved paths within the first directory level containing matches for all provided paths.
- each: independently return the first resolved path for each path at any directory level.
Default: 'all'.

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

var opts = {
    'dir': __dirname
};
resolveParentPaths( [ 'package.json' ], opts, onPaths );

function onPaths( error, paths ) {
    if ( error ) {
        throw error;
    }
    console.log( paths );
    // => [...]
}

By default, the function requires that a directory contains matches for all provided paths before returning results. To specify an alternative operation mode, set the mode option.

var opts = {
    'dir': __dirname,
    'mode': 'first'
};
resolveParentPaths( [ 'package.json', 'package-lock.json' ], opts, onPaths );

function onPaths( error, paths ) {
    if ( error ) {
        throw error;
    }
    console.log( paths );
    // => [...]
}

resolveParentPaths.sync( paths[, options] )

Synchronously resolves paths from a set of paths by walking parent directories.

var paths = resolveParentPaths.sync( [ 'package.json', 'README.md' ] );
// returns [...]

The function accepts the same options as resolveParentPaths().

Notes

In some mode, the return order of asynchronously resolved paths is not guaranteed.
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 real absolute file paths 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 resolveParentPaths = require( '@stdlib/fs/resolve-parent-paths' );

var opts = {
    'dir': __dirname
};

/* Sync */

var out = resolveParentPaths.sync( [ 'package.json', 'README.md' ], opts );
// returns [...]

out = resolveParentPaths.sync( [ 'non_existent_basename' ], opts );
// returns []

opts.mode = 'first';
out = resolveParentPaths.sync( [ 'non_existent_basename', 'package.json' ], opts );
// returns [...]

/* Async */

resolveParentPaths( [ 'package.json', 'README.md' ], opts, onPaths );
resolveParentPaths( [ './../non_existent_path' ], onPaths );

function onPaths( error, paths ) {
    if ( error ) {
        throw error;
    }
    console.log( paths );
}

CLI

Usage

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

Options:

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

Examples

$ resolve-parent-paths package.json package-lock.json