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Contents
class Thor
class Argument #:nodoc:
VALID_TYPES = [:numeric, :hash, :array, :string]
attr_reader :name, :description, :enum, :required, :type, :default, :banner
alias_method :human_name, :name
def initialize(name, options = {})
class_name = self.class.name.split('::').last
type = options[:type]
fail ArgumentError, "#{class_name} name can't be nil." if name.nil?
fail ArgumentError, "Type :#{type} is not valid for #{class_name.downcase}s." if type && !valid_type?(type)
@name = name.to_s
@description = options[:desc]
@required = options.key?(:required) ? options[:required] : true
@type = (type || :string).to_sym
@default = options[:default]
@banner = options[:banner] || default_banner
@enum = options[:enum]
validate! # Trigger specific validations
end
def usage
required? ? banner : "[#{banner}]"
end
def required?
required
end
def show_default?
case default
when Array, String, Hash
!default.empty?
else
default
end
end
protected
def validate!
if required? && !default.nil?
fail ArgumentError, 'An argument cannot be required and have default value.'
elsif @enum && !@enum.is_a?(Array)
fail ArgumentError, 'An argument cannot have an enum other than an array.'
end
end
def valid_type?(type)
self.class::VALID_TYPES.include?(type.to_sym)
end
def default_banner
case type
when :boolean
nil
when :string, :default
human_name.upcase
when :numeric
'N'
when :hash
'key:value'
when :array
'one two three'
end
end
end
end
Version data entries
49 entries across 49 versions & 2 rubygems