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#! /usr/bin/ruby
# contributed by Minero Aoki.
require 'optparse'
parser = OptionParser.new
parser.on('-i') { puts "-i" }
parser.on('-o') { puts '-o' }
subparsers = Hash.new {|h,k|
$stderr.puts "no such subcommand: #{k}"
exit 1
}
subparsers['add'] = OptionParser.new.on('-i') { puts "add -i" }
subparsers['del'] = OptionParser.new.on('-i') { puts "del -i" }
subparsers['list'] = OptionParser.new.on('-i') { puts "list -i" }
parser.order!(ARGV)
subparsers[ARGV.shift].parse!(ARGV) unless ARGV.empty?
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