Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 | 8x 8x 8x 8x 8x 8x 8x 8x 8x 8x 8x 8x 8x 8x 8x 8x 8x 8x 8x 8x 8x 8x 8x 8x 8x 8x 8x 8x 8x 8x 8x 8x 8x 8x 8x 8x 8x 8x 8x 8x 8x 8x 8x 8x 8x 8x 8x 8x 8x 8x 8x 8x 8x 8x 8x 53x 53x 53x 53x 53x 53x 53x 53x 16x 16x 37x 53x 27x 27x 27x 16x 16x 53x 10x 10x 53x 16x 16x 53x 2x 3x 3x 3x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 23x 3x 3x 20x 20x 20x 20x 20x 22x 2x 2x 18x 18x 18x 23x 53x 8x 8x 8x 8x 8x | /**
* @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( '@stdlib/fs/exists' );
var format = require( '@stdlib/string/format' );
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( format( 'invalid argument. First argument must be a string. Value: `%s`.', 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( format( 'invalid argument. Callback argument must be a function. Value: `%s`.', 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;
|