98 lines
2.7 KiB
JavaScript
98 lines
2.7 KiB
JavaScript
|
/**
|
||
|
|
* @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( './../../exists' ).sync;
|
||
|
|
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( 'invalid argument. First argument must be a string primitive. Value: `' + 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( 'invalid argument. Last argument must be a function. Value: `' + 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;
|