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Contents
# TITLE:
#
# GetoptLong Revisted
#
# DESCRIPTION:
#
# Ruby's standard GetoptLong class with an added DSL.
#
# COPYRIGHT:
#
# Copyright (c) 2007 Thomas Sawyer
#
# LICENSE:
#
# 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.
#
# AUTHORS:
#
# - Thomas Sawuer
require 'getoptlong'
# = 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|
# ...
# }
#
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
# TEST
=begin test
require 'test/unit'
class TestGetoptShort < Test::Unit::TestCase
def test_dsl
ARGV.replace(['foo', '--expect', 'A', '-h', 'nothing'])
opts = GetoptLong.new do
reqs '--expect', '-x'
flag '--help', '-h'
end
ch = {}
opts.each { |opt, arg|
ch[opt] = arg
}
assert_equal( 'A', ch['--expect'] )
assert_equal( '', ch['--help'] )
end
end
=end
Version data entries
12 entries across 12 versions & 1 rubygems