# frozen_string_literal: true module Rake ## # TaskArguments manage the arguments passed to a task. # class TaskArguments include Enumerable # Argument names attr_reader :names # Create a TaskArgument object with a list of argument +names+ and a set # of associated +values+. +parent+ is the parent argument object. def initialize(names, values, parent=nil) @names = names @parent = parent @hash = {} @values = values names.each_with_index { |name, i| next if values[i].nil? || values[i] == "" @hash[name.to_sym] = values[i] } end # Retrieve the complete array of sequential values def to_a @values.dup end # Retrieve the list of values not associated with named arguments def extras @values[@names.length..-1] || [] end # Create a new argument scope using the prerequisite argument # names. def new_scope(names) values = names.map { |n| self[n] } self.class.new(names, values + extras, self) end # Find an argument value by name or index. def [](index) lookup(index.to_sym) end # Specify a hash of default values for task arguments. Use the # defaults only if there is no specific value for the given # argument. def with_defaults(defaults) @hash = defaults.merge(@hash) end # Enumerates the arguments and their values def each(&block) @hash.each(&block) end # Extracts the argument values at +keys+ def values_at(*keys) keys.map { |k| lookup(k) } end # Returns the value of the given argument via method_missing def method_missing(sym, *args) lookup(sym.to_sym) end # Returns a Hash of arguments and their values def to_hash @hash.dup end def to_s # :nodoc: inspect end def inspect # :nodoc: inspection = @hash.map do |k,v| "#{k.to_s}: #{v.to_s}" end.join(", ") "#<#{self.class} #{inspection}>" end # Returns true if +key+ is one of the arguments def has_key?(key) @hash.has_key?(key) end alias key? has_key? def fetch(*args, &block) @hash.fetch(*args, &block) end protected def lookup(name) # :nodoc: if @hash.has_key?(name) @hash[name] elsif @parent @parent.lookup(name) end end end EMPTY_TASK_ARGS = TaskArguments.new([], []) # :nodoc: end