Safely reset yargs

Author: Anand Thakker

lib/args.js

@@ -1,9 +1,12 @@
 var documentation = require('../'),
   path = require('path'),
   loadConfig = require('../lib/load_config.js');
-
 var yargs = require('yargs')
-  .reset()
+
+function parse() {
+  // reset() needs to be called at parse time because the yargs module uses an
+  // internal global variable to hold option state
+  return yargs.reset()
   .usage('Usage: $0 <command> [options]')
 
   .option('f', {
@@ -52,16 +55,19 @@ var yargs = require('yargs')
   .help('h')
   .alias('h', 'help')
 
-  .example('$0 foo.js', 'parse documentation in a given file');
+  .example('$0 foo.js', 'parse documentation in a given file')
 
+  .parse(args)
+
+}
 /**
  * Parse and validate command-line options for documentation.
  * @param {Array} args The array of arguments to parse; e.g. process.argv.slice(2).
  * @return {object} {inputs, options, formatter, formatterOptions, output}
  * @private
  */
 module.exports = function (args) {
-  var argv = yargs.parse(args);
+  var argv = parse(args);
 
   var inputs,
     name = argv.name,