Module: Buildr::Attributes

Included in:
Java::CompileTask::Options, Project
Defined in:
lib/core/core.rb

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.included(mod) ⇒ Object 



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# File 'lib/core/core.rb', line 15

def self.included(mod)
  mod.extend(self)
end

Instance Method Details

#inherited_attr(symbol, default = nil, &block) ⇒ Object

An inherited attribute gets it value from an instance variable with the same name. If the value is not set it will defer to the parent object. If there is no parent object, it will use the default value; with a block, it evaluates the block by calling instance_eval on the object.

For example:

inherited_attr :version
inherited_attr :src_dir, "src"
inherited_attr :java_src_dir do src_dir + "/main/java"



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# File 'lib/core/core.rb', line 29

def inherited_attr(symbol, default = nil, &block)
  block ||= proc { default }
  define_method symbol do
    instance_variable_get("@#{symbol}") || (parent ? parent.send(symbol) : self.instance_eval(&block))
  end
  define_method "#{symbol}=" do |value|
    instance_variable_set("@#{symbol}", value)
  end
end