open/create file in ruby

gistfile1.txt

#!/usr/bin/ruby

require 'io/console'

for arg in ARGV
 
 # expand the full path
 file_path = File.expand_path(arg)
 
 # if file doesn't exist, create it
 if !File.exists?(file_path)
   print "File doesn't exist: #{file_path}\n Create it now? [y/N] "
   unless (STDIN.getch.downcase == 'y')
     puts "n\n"
     exit
   end
   
   puts "y\n"
   File.open(file_path, 'a') {}
   puts "Created #{file_path}\n";
 end

 # open it in dux
 system "open -a /Applications/Dux.app '#{file_path}'"
 
end