class Rake::TaskArguments

TaskArguments manage the arguments passed to a task.

Attributes

names[R]

Argument names

Public Class Methods

new(names, values, parent=nil) click to toggle source

Create a TaskArgument object with a list of argument names and a set of associated values. parent is the parent argument object.

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

Public Instance Methods

[](index) click to toggle source

Find an argument value by name or index.

# File lib/rake/task_arguments.rb, line 43
def [](index)
  lookup(index.to_sym)
end
each(&block) click to toggle source

Enumerates the arguments and their values

# File lib/rake/task_arguments.rb, line 55
def each(&block)
  @hash.each(&block)
end
extras() click to toggle source

Retrieve the list of values not associated with named arguments

# File lib/rake/task_arguments.rb, line 31
def extras
  @values[@names.length..-1] || []
end
fetch(*args, &block) click to toggle source
# File lib/rake/task_arguments.rb, line 87
def fetch(*args, &block)
  @hash.fetch(*args, &block)
end
has_key?(key) click to toggle source

Returns true if key is one of the arguments

# File lib/rake/task_arguments.rb, line 83
def has_key?(key)
  @hash.has_key?(key)
end
method_missing(sym, *args) click to toggle source

Returns the value of the given argument via #method_missing

# File lib/rake/task_arguments.rb, line 65
def method_missing(sym, *args)
  lookup(sym.to_sym)
end
new_scope(names) click to toggle source

Create a new argument scope using the prerequisite argument names.

# File lib/rake/task_arguments.rb, line 37
def new_scope(names)
  values = names.map { |n| self[n] }
  self.class.new(names, values + extras, self)
end
to_a() click to toggle source

Retrieve the complete array of sequential values

# File lib/rake/task_arguments.rb, line 26
def to_a
  @values.dup
end
to_hash() click to toggle source

Returns a Hash of arguments and their values

# File lib/rake/task_arguments.rb, line 70
def to_hash
  @hash
end
values_at(*keys) click to toggle source

Extracts the argument values at keys

# File lib/rake/task_arguments.rb, line 60
def values_at(*keys)
  keys.map { |k| lookup(k) }
end
with_defaults(defaults) click to toggle source

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

# File lib/rake/task_arguments.rb, line 50
def with_defaults(defaults)
  @hash = defaults.merge(@hash)
end