#---
# Excerpted from "Everyday Scripting in Ruby"
# We make no guarantees that this code is fit for any purpose. 
# Visit http://www.pragmaticprogrammer.com/titles/bmsft for more book information.
#---
### The following adjusts the load path so that the correct version of
### a self-contained package is found, no matter where the script is
### run from. 
require 'pathname'
$:.unshift((Pathname.new(__FILE__).parent.parent + 'lib').to_s)
require 'user-choices/third-party/s4t-utils/load-path-auto-adjuster'


### How to use UserChoices to handle the command line.
### (A Simple example.) 



require 'pp'
require 'user-choices'
include UserChoices

class CommandLineExample < Command

  # The _sources_ are the various places in which the user can
  # describe her choices to the program. In this case, there's
  # only the command line. 

  def add_sources(builder)
    builder.add_source(CommandLineChoices, :usage,
                       "Usage ruby #{$0} [options] names...")
  end

  # Each individual choice is named with a symbol. The block
  # describes the command line options corresponding to the choice, plus
  # any help text for that option. The arguments to uses_options are passed
  # on to OptionParser. 

  def add_choices(builder)
    builder.add_choice(:choice) { | command_line |
      command_line.uses_option("-c", "--choice CHOICE",
                               "CHOICE can be any string.")
    }

    # The argument list to the command is interpreted as another
    # option. In this case, it's a list of strings.
    builder.add_choice(:names) { | command_line |
      command_line.uses_arglist
    }
  end

  # Perform the command.
  def execute
    pp @user_choices
  end
end


if $0 == __FILE__
  S4tUtils.with_pleasant_exceptions do
    CommandLineExample.new.execute
  end
end