65 lines
1.6 KiB
JavaScript
65 lines
1.6 KiB
JavaScript
/**
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* @license Apache-2.0
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*
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* Copyright (c) 2021 The Stdlib Authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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'use strict';
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// MODULES //
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var contains = require( '@stdlib/assert/contains' );
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var posix = require( './../../extname-posix' );
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var win32 = require( './../../extname-windows' );
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var IS_WINDOWS = require( '@stdlib/assert/is-windows' );
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// VARIABLES //
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var PLATFORMS = [ 'posix', 'win32' ];
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// MAIN //
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/**
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* Returns a regular expression to capture a filename extension.
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*
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* @param {string} [platform] - path platform (`win32` or `posix`)
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* @throws {Error} platform must be `win32` or `posix`
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* @returns {RegExp} regular expression
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*
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* @example
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* var RE = reExtname();
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* var base = RE.exec( '/foo/bar/index.js' )[ 1 ];
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* // returns '.js'
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*/
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function reExtname( platform ) {
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if ( arguments.length > 0 ) {
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if ( !contains( PLATFORMS, platform ) ) {
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throw new Error( 'invalid argument. Platform must be either `posix` or `win32`. Value: `' + platform + '`.' );
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}
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}
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if ( platform === 'win32' || IS_WINDOWS ) {
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return win32();
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}
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// Case: platform === 'posix'
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return posix();
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}
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// EXPORTS //
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module.exports = reExtname;
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