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✏️ Editing: argument.rb

class Bundler::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]

raise ArgumentError, "#{class_name} name can't be nil."                         if name.nil?
      raise 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 print_default
      if @type == :array and @default.is_a?(Array)
        @default.map(&:dump).join(" ")
      else
        @default
      end
    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

def enum_to_s
      if enum.respond_to? :join
        enum.join(", ")
      else
        "#{enum.first}..#{enum.last}"
      end
    end

protected

def validate!
      raise ArgumentError, "An argument cannot be required and have default value." if required? && !default.nil?
      raise ArgumentError, "An argument cannot have an enum other than an enumerable." if @enum && !@enum.is_a?(Enumerable)
    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

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