Really Cheap Command-Line Option Parsing in Ruby

Question

EDIT: Please, please, please read the two requirements listed at the bottom of this post before replying. People keep posting their new gems and li

Answer 1

Suppose a command has at most one action and arbitrary number of options like this:

cmd.rb
cmd.rb action
cmd.rb action -a -b ...
cmd.rb action -ab ...

The parsing without validation may be like this:

ACTION = ARGV.shift
OPTIONS = ARGV.join.tr('-', '')

if ACTION == '***'
  ...
  if OPTIONS.include? '*'
    ...
  end
  ...
end