A stand-alone Task executable

sample.rb

#! /usr/bin/env ruby

require 'rubygems'
require 'tap/task'

# Sample::task a sample task
#
# This is a sample of a task used as an executable. This is a sample of a
# task used as an executable. This is a sample of a task used as an
# executable.
#
#   sample code
#
# This is a sample of a task used as an executable. This is a sample of a
# task used as an executable. This is a sample of a task used as an
# executable.
class Sample < Tap::Task
  config :message, "hello"  # A configurable message
  
  def process(input)
    puts "#{message} #{input}"
  end
end

#
# In most cases I think it's better to do this:
#

parser = ConfigParser.new do |opts|
  opts.separator "configurations"
  opts.add Sample.configurations

  opts.on "--help", "Print this help" do
    puts "usage: sample INPUT"
    puts
    puts Sample::desc.wrap
    puts
    puts opts
    exit(0)
  end
end

parser.parse!(ARGV)
Sample.new(parser.config).execute(ARGV)


#
# I added functionality to do this, but I think I will remove it
# because, while it would be a little more compact it mixes the
# original use of parse! (to instantiate from a schema) with the
# use of Tasks here.  It also adds to the parse! API, which I am
# eager to do.
#
# Maybe there is a way to set the banner correctly and in a
# general way.  Perhaps that would be sufficient?
#

# Sample.parse!(ARGV) do |opts|
#   opts.on! "--help", "Print this help" do
#     puts "usage: sample INPUT"
#     puts
#     puts Sample::desc.wrap
#     puts
#     puts opts
#     exit(0)
#   end
# end.execute(ARGV)