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 | 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 52x 52x 52x 52x 52x 52x 52x 52x 16x 16x 36x 52x 26x 26x 16x 16x 10x 52x 10x 10x 52x 16x 16x 52x 2x 2x 2x 2x 4x 52x 22x 22x 2x 2x 20x 20x 20x 2x 52x 2x 2x 2x 2x 2x | /**
* @license Apache-2.0
*
* Copyright (c) 2021 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' ).sync;
var format = require( '@stdlib/string/format' );
var validate = require( './validate.js' );
// MAIN //
/**
* Synchronously resolves a path according to a predicate function by walking parent directories.
*
* @param {string} path - path to resolve
* @param {Options} [options] - function options
* @param {string} [options.dir] - base directory
* @param {Function} predicate - callback which tests whether a resolved path passes a test
* @throws {TypeError} first argument must be a string
* @throws {TypeError} options argument must be an object
* @throws {TypeError} must provide valid options
* @throws {TypeError} last argument must be a function
* @returns {(string|null)} resolved path or null
*
* @example
* function predicate() {
* return true;
* }
*
* var path = resolveParentPathBy( 'package.json', predicate );
* // e.g., returns '...'
*/
function resolveParentPathBy( path, options, predicate ) {
var spath;
var child;
var test;
var opts;
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 ) {
err = validate( opts, options );
if ( err ) {
throw err;
}
test = predicate;
} else {
test = options;
}
if ( !isFunction( test ) ) {
throw new TypeError( format( 'invalid argument. Last argument must be a function. Value: `%s`.', test ) );
}
if ( opts.dir ) {
dir = resolve( cwd(), opts.dir );
} else {
dir = cwd();
}
// Start at a base directory and continue moving up through each parent directory until able to resolve a search path or until reaching the root directory...
while ( child !== dir ) {
spath = resolve( dir, path );
if ( exists( spath ) && test( spath ) ) {
return spath;
}
child = dir;
dir = resolve( dir, '..' );
}
return null;
}
// EXPORTS //
module.exports = resolveParentPathBy;
|