optparse_example.rb

#!/bin/env ruby -w

require 'optparse'
require File.dirname(__FILE__) + "/../lib/couchrest"

# Set defaults
options = {
  :verbose     => false,
  :design_name => "_design",
}

opts = OptionParser.new do |opts|
  opts.banner = "Usage: #$0 [options] (push|generate) directory database"
  opts.on('-v', '--verbose', "Print extra debug info") do
    options[:verbose] = true
  end
  opts.on('-d', '--design-name [name]', "Use an alternate name. Defaults to #{options[:design_name]}") do |design_name|
    options[:design_name] = design_name
  end
  opts.on_tail('-h', '--help', "Display this help and exit") do
    puts opts
    exit
  end
end
opts.parse!(ARGV)

options[:command]   = ARGV.shift
options[:directory] = ARGV.shift
options[:database]  = ARGV.shift

# There must be a better way to check for extra required args
unless (["push", "generate"].include?(options[:command]) && options[:directory] && options[:database])
  puts(opts)
  exit
end

# DEBUG
puts options.inspect

# The options hash now contains the resolved defaults 
# and the overrides from the command line.

# Call your class and send it the options here
# cr = CouchRest::FileManager.new(options[:database_name])