optparse-example.rb

#!/usr/bin/ruby

require 'optparse'

options = {:username => nil, :role => nil, :group => nil}

parser = OptionParser.new do|opts|
	opts.banner = "Usage: bl-rest.rb [options]"
	opts.on('-u', '--username name', 'username') do |username|
		options[:username] = username;
	end

	opts.on('-r', '--role role', 'Role') do |role|
		options[:role] = role;
	end
	
	opts.on('-g', '--group group', 'group') do |group|
		options[:group] = group;
	end

	opts.on('-h', '--help', 'Displays Help') do
		puts opts
		exit
	end
end


parser.parse!

if options[:username] == nil
	print 'Username: '
    options[:username] = gets.chomp
end

if options[:role] == nil
	print 'Role: '
    options[:role] = gets.chomp
end

assign= "Username #{options[:username]}" + ','


puts "#{assign} and role is #{options[:role]}"