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ruby21
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lib64
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2.1.0
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rake
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module Rake #################################################################### # TaskArguments manage the arguments passed to a task. # class TaskArguments include Enumerable attr_reader :names # Create a TaskArgument object with a list of named arguments # (given by :names) and a set of associated values (given by # :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| @hash[name.to_sym] = values[i] unless values[i].nil? } end # Retrive the complete array of sequential values def to_a @values.dup end # Retrive 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 def each(&block) @hash.each(&block) end def values_at(*keys) keys.map { |k| lookup(k) } end def method_missing(sym, *args) lookup(sym.to_sym) end def to_hash @hash end def to_s @hash.inspect end def inspect to_s end protected def lookup(name) if @hash.has_key?(name) @hash[name] elsif @parent @parent.lookup(name) end end end EMPTY_TASK_ARGS = TaskArguments.new([], []) end
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