Sha256: b3f6231124afcc64fa53628cbe9c53e3de5c6fd5bbe92b414bdd0138e093a508
Contents?: true
Size: 1.95 KB
Versions: 1
Compression:
Stored size: 1.95 KB
Contents
require 'clamp/attribute' module Clamp class Option < Attribute def initialize(switches, type, description, options = {}) @switches = Array(switches) @type = type @description = description if options.has_key?(:attribute_name) @attribute_name = options[:attribute_name].to_s end if options.has_key?(:default) @default_value = options[:default] end if options.has_key?(:env) @environment_variable = options[:env] end if options.has_key?(:required) @required = options[:required] # Do some light validation for conflicting settings. if options.has_key?(:default) raise ArgumentError, "Specifying a :default value also :required doesn't make sense" end if type == :flag raise ArgumentError, "A required flag (boolean) doesn't make sense." end end end attr_reader :switches, :type def attribute_name @attribute_name ||= long_switch.sub(/^--(\[no-\])?/, '').tr('-', '_') end def long_switch switches.find { |switch| switch =~ /^--/ } end def handles?(switch) recognised_switches.member?(switch) end def required? @required end def flag? @type == :flag end def flag_value(switch) !(switch =~ /^--no-(.*)/ && switches.member?("--\[no-\]#{$1}")) end def read_method if flag? super + "?" else super end end def extract_value(switch, arguments) if flag? flag_value(switch) else arguments.shift end end def help_lhs lhs = switches.join(", ") lhs += " " + type unless flag? lhs end private def recognised_switches switches.map do |switch| if switch =~ /^--\[no-\](.*)/ ["--#{$1}", "--no-#{$1}"] else switch end end.flatten end end end
Version data entries
1 entries across 1 versions & 1 rubygems
Version | Path |
---|---|
jls-clamp-0.3.1.2 | lib/clamp/option.rb |