Simple option parsing

example.txt

11:15:19 Temp$ ./opt.rb -s abc.def -- -x
{:source_path=>"abc.def"}
11:15:22 Temp$ ./opt.rb -s abc.def -- -x
{:source_path=>"abc.def"}
["-x"]
11:15:28 Temp$ ./opt.rb -s abc.def
{:source_path=>"abc.def"}
[]
11:15:31 Temp$ ./opt.rb -s abc.def -d .
{:source_path=>"abc.def", :dest_path=>"."}
[]
11:15:36 Temp$ ./opt.rb -s abc.def -d . -v
{:source_path=>"abc.def", :dest_path=>".", :verbose=>true}
[]
11:15:39 Temp$ ./opt.rb -s abc.def -d . -v a b c
{:source_path=>"abc.def", :dest_path=>".", :verbose=>true}
["a", "b", "c"]

optparse_quick.rb

require 'optparse'

# Pass a Hash which maps Hash keys to option names
def OptionParser.quick!(argv, options)
  result = {}

  new do |opts|
    options.each do |key, op|
      # prepare key
      raise ArgumentError, 'Invalid option: %p' % op unless /\A([a-z])(:)?\z/i =~ op

      has_arg = $2
      opt_char = has_arg ? "-#$1 VALUE" : "-#$1"

      # add option
      opts.on opt_char, do |v|
        result[key] = v
      end
    end
  end.parse! argv

  result
end

options = OptionParser.quick!(ARGV,
  :source_path => 's:',
  :dest_path => 'd:',
  :verbose => 'v',
)

p options, ARGV