class Rake::TaskArguments

TaskArguments manage the arguments passed to a task.

Attributes

Argument names

Public Class Methods

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 15
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)

Find an argument value by name or index.

# File lib/rake/task_arguments.rb, line 44
def [](index)
  lookup(index.to_sym)
end

each (&block)

Enumerates the arguments and their values

# File lib/rake/task_arguments.rb, line 56
def each(&block)
  @hash.each(&block)
end

extras ()

Retrieve the list of values not associated with named arguments

# File lib/rake/task_arguments.rb, line 32
def extras
  @values[@names.length..-1] || []
end

fetch (*args, &block)

# File lib/rake/task_arguments.rb, line 93
def fetch(*args, &block)
  @hash.fetch(*args, &block)
end

has_key? (key)

Returns true if key is one of the arguments

# File lib/rake/task_arguments.rb, line 88
def has_key?(key)
  @hash.has_key?(key)
end

Also aliased as: key?

key? (key)

Alias for: has_key?

method_missing (sym, *args)

Returns the value of the given argument via method_missing

# File lib/rake/task_arguments.rb, line 66
def method_missing(sym, *args)
  lookup(sym.to_sym)
end

new_scope (names)

Create a new argument scope using the prerequisite argument names.

# File lib/rake/task_arguments.rb, line 38
def new_scope(names)
  values = names.map { |n| self[n] }
  self.class.new(names, values + extras, self)
end

to_a ()

Retrieve the complete array of sequential values

# File lib/rake/task_arguments.rb, line 27
def to_a
  @values.dup
end

to_hash ()

Returns a Hash of arguments and their values

# File lib/rake/task_arguments.rb, line 71
def to_hash
  @hash.dup
end

values_at (*keys)

Extracts the argument values at keys

# File lib/rake/task_arguments.rb, line 61
def values_at(*keys)
  keys.map { |k| lookup(k) }
end

with_defaults (defaults)

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 51
def with_defaults(defaults)
  @hash = defaults.merge(@hash)
end