Class: Rake::TaskArguments

Inherits:
Object
  • Object
show all
Includes:
Enumerable
Defined in:
lib/rake/task_arguments.rb

Overview

TaskArguments manage the arguments passed to a task.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(names, values, parent = nil) ⇒ TaskArguments

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.


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# File 'lib/rake/task_arguments.rb', line 14

def initialize(names, values, parent=nil)
  @names = names
  @parent = parent
  @hash = {}
  names.each_with_index { |name, i|
    @hash[name.to_sym] = values[i] unless values[i].nil?
  }
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(sym, *args) ⇒ Object


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# File 'lib/rake/task_arguments.rb', line 50

def method_missing(sym, *args)
  lookup(sym.to_sym)
end

Instance Attribute Details

#namesObject (readonly)

Returns the value of attribute names


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# File 'lib/rake/task_arguments.rb', line 9

def names
  @names
end

Instance Method Details

#[](index) ⇒ Object

Find an argument value by name or index.


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# File 'lib/rake/task_arguments.rb', line 31

def [](index)
  lookup(index.to_sym)
end

#each(&block) ⇒ Object


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# File 'lib/rake/task_arguments.rb', line 42

def each(&block)
  @hash.each(&block)
end

#inspectObject


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# File 'lib/rake/task_arguments.rb', line 62

def inspect
  to_s
end

#new_scope(names) ⇒ Object

Create a new argument scope using the prerequisite argument names.


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# File 'lib/rake/task_arguments.rb', line 25

def new_scope(names)
  values = names.collect { |n| self[n] }
  self.class.new(names, values, self)
end

#to_hashObject


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# File 'lib/rake/task_arguments.rb', line 54

def to_hash
  @hash
end

#to_sObject


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# File 'lib/rake/task_arguments.rb', line 58

def to_s
  @hash.inspect
end

#values_at(*keys) ⇒ Object


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# File 'lib/rake/task_arguments.rb', line 46

def values_at(*keys)
  keys.map { |k| lookup(k) }
end

#with_defaults(defaults) ⇒ Object

Specify a hash of default values for task arguments. Use the defaults only if there is no specific value for the given argument.


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# File 'lib/rake/task_arguments.rb', line 38

def with_defaults(defaults)
  @hash = defaults.merge(@hash)
end