function(opts) {
		if (opts.preScriptFile) {
			var path = require('path');
			opts.preScript = require(path.resolve(opts.preScriptFile));
			delete opts.preScriptFile;
		}
		opts.preScript = opts.preScript || function(browser) {
			return;
		};
		return opts;
	}
function(opts) {
		if (opts.preScriptFile) {
			var path = require('path');
			opts.preScript = require(path.resolve(opts.preScriptFile));
			delete opts.preScriptFile;
		}
		opts.preScript = opts.preScript || function(browser) {
			return;
		};
		return opts;
	}
function ( opts ) { if ( opts . preScriptFile ) { var path = require ( 'path' ) ; opts . preScript = require ( path . resolve ( opts . preScriptFile ) ) ; delete opts . preScriptFile ; } opts . preScript = opts . preScript || function ( browser ) { return ; } ; return opts ; }
preScript, preScriptFile
preScript preScriptFile