A minor modification to Ruby's built-in OptionParser class to allow required switches.
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Allows a programmer to easily add required switches to a Ruby app using the built-in OptionParser class.

To make a switch required simple add the symbol :required anywhere in the list of options like so:

opts.on("-f [foo]", String, :required, "Required option") do |option|
  @options[:foo] = option

Then at the end of your OptionParser block add something like this:

if opts.missing_switches?
  puts opts.missing_switches
  puts opts

You of course need to require the “pickled_optparse” gem but that's it. You don't need to require the opt_parse file because that's already handled for you.

For a complete usage example see the examples/example.rb file.

Note on Patches/Pull Requests

  • Fork the project.

  • Make your feature addition or bug fix.

  • Add tests for it. This is important so I don't break it in a future version unintentionally.

  • Commit, do not mess with rakefile, version, or history. (if you want to have your own version, that is fine but bump version in a commit by itself I can ignore when I pull)

  • Send me a pull request. Bonus points for topic branches.


Copyright © 2010 Mike Bethany. See LICENSE for details.