text: /**
  * @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 logger = require( 'debug' );
  var isObject = require( '@stdlib/assert/is-plain-object' );
  var replace = require( '@stdlib/string/replace' );
  
  
  // VARIABLES //
  
  var debug = logger( 'licenses:pkg:repo' );
  
  
  // MAIN //
  
  /**
  * Extracts a repository URL (if available) from `package.json` data.
  *
  * @private
  * @param {Object} pkg - `package.json` data
  * @returns {(string|null)} repo URL or null
  */
  function repo( pkg ) {
  	var url;
  	if ( isObject( pkg.repository ) ) {
  		url = pkg.repository.url;
  		if ( url ) {
  			// GitHub URLs:
  			url = replace( url, 'git\\+ssh\\:\\/\\/git\\@', 'git://' );
  			url = replace( url, 'git\\+', '' );
  			url = replace( url, 'git\\:\\/\\/', 'https://' );
  			url = replace( url, 'git\\@', 'https://' );
  			url = replace( url, '\\.git', '' );
  
  			debug( 'Package repository URL: %s.', url );
  			return url;
  		}
  	}
  	debug( 'Unable to find repository URL in `package.json`.' );
  	return null;
  }
  
  
  // EXPORTS //
  
  module.exports = repo;
  