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Versions: 17
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Contents
# = GetoptLong
#
# Ruby's standard GetoptLong class with an added DSL.
#
# opts = GetoptLong.new do
# reqs '--expect', '-x'
# flag '--help', '-h'
# end
#
# opts.each { |opt, arg|
# ...
# }
#
# == Authors
#
# * Thomas Sawuer
#
# == Copying
#
# Copyright (c) 2007 Thomas Sawyer
#
# Ruby License
#
# This module is free software. You may use, modify, and/or redistribute this
# software under the same terms as Ruby.
#
# This program is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE.
require 'getoptlong'
class GetoptLong
alias :init :initialize
def initialize(*arguments, &block)
if block_given?
raise ArgumentError unless arguments.empty?
arguments = DSL.new(&block).arguments
end
init(*arguments)
end
# DSL-mode parser.
class DSL
attr :arguments
def initialize(&block)
@arguments = []
instance_eval(&block)
end
def flag(*opts)
@arguments << (opts << GetoptLong::NO_ARGUMENT)
end
def required(*opts)
@arguments << (opts << GetoptLong::REQUIRED_ARGUMENT)
end
alias :reqs :required
def optional(*opts)
@arguments << (opts << GetoptLong::OPTIONAL_ARGUMENT)
end
alias :opts :optional
end
end
Version data entries
17 entries across 17 versions & 2 rubygems