116 lines
3.0 KiB
JavaScript
116 lines
3.0 KiB
JavaScript
/**
|
|
* @license Apache-2.0
|
|
*
|
|
* Copyright (c) 2018 The Stdlib Authors.
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
'use strict';
|
|
|
|
// MODULES //
|
|
|
|
var resolve = require( 'path' ).resolve;
|
|
var isString = require( '@stdlib/assert/is-string' ).isPrimitive;
|
|
var isFunction = require( '@stdlib/assert/is-function' );
|
|
var cwd = require( '@stdlib/process/cwd' );
|
|
var exists = require( './../../exists' );
|
|
var validate = require( './validate.js' );
|
|
|
|
|
|
// MAIN //
|
|
|
|
/**
|
|
* Asynchronously resolves a path by walking parent directories.
|
|
*
|
|
* @param {string} path - path to resolve
|
|
* @param {Options} [options] - function options
|
|
* @param {string} [options.dir] - base directory
|
|
* @param {Callback} clbk - callback to invoke after resolving a path
|
|
* @throws {TypeError} first argument must be a string
|
|
* @throws {TypeError} callback argument must be a function
|
|
* @throws {TypeError} options argument must be an object
|
|
* @throws {TypeError} must provide valid options
|
|
*
|
|
* @example
|
|
* resolveParentPath( 'package.json', onPath );
|
|
*
|
|
* function onPath( error, path ) {
|
|
* if ( error ) {
|
|
* throw error;
|
|
* }
|
|
* console.log( path );
|
|
* }
|
|
*/
|
|
function resolveParentPath( path, options, clbk ) {
|
|
var spath;
|
|
var child;
|
|
var opts;
|
|
var done;
|
|
var dir;
|
|
var err;
|
|
if ( !isString( path ) ) {
|
|
throw new TypeError( 'invalid argument. First argument must be a string primitive. Value: `' + path + '`.' );
|
|
}
|
|
opts = {};
|
|
if ( arguments.length > 2 ) {
|
|
done = clbk;
|
|
err = validate( opts, options );
|
|
if ( err ) {
|
|
throw err;
|
|
}
|
|
} else {
|
|
done = options;
|
|
}
|
|
if ( !isFunction( done ) ) {
|
|
throw new TypeError( 'invalid argument. Callback argument must be a function. Value: `' + done + '`.' );
|
|
}
|
|
if ( opts.dir ) {
|
|
dir = resolve( cwd(), opts.dir );
|
|
} else {
|
|
dir = cwd();
|
|
}
|
|
spath = resolve( dir, path );
|
|
exists( spath, onExists );
|
|
|
|
/**
|
|
* Callback invoked after checking for path existence.
|
|
*
|
|
* @private
|
|
* @param {(Error|null)} error - error object
|
|
* @param {boolean} bool - boolean indicating if a path exists
|
|
* @returns {void}
|
|
*/
|
|
function onExists( error, bool ) { // eslint-disable-line handle-callback-err
|
|
if ( bool ) {
|
|
return done( null, spath );
|
|
}
|
|
// Resolve a parent directory:
|
|
child = dir;
|
|
dir = resolve( dir, '..' );
|
|
|
|
// If we have already reached root, we cannot resolve any higher directories...
|
|
if ( child === dir ) {
|
|
return done( null, null );
|
|
}
|
|
// Resolve the next search path:
|
|
spath = resolve( dir, path );
|
|
exists( spath, onExists );
|
|
}
|
|
}
|
|
|
|
|
|
// EXPORTS //
|
|
|
|
module.exports = resolveParentPath;
|