[chef] cascade update dependent attributes

[Daneel Yaitskov < >]

Hi,

Is any body faced with such problem?

cookbook1 attributes

default[:a] = 1
default[:b] = "use-#{ node.a }"

cookbook2 attributes

override[:a] = 2

I found that in the cassandra cookbook.

The problem is if I want to change one attribute in the wrapper cookbook I have to change both attributes.

Otherwise error happens because ruby make substitution before cookbook2 is loaded.

Does Chef has any standard method to cope with it?

I see a simple solution:

class DynamicAttribute
  def initialize(&block)
    @block = block
  end
  def to_s
    @block.call
  end
end

Usage:

default[:a] = DynamicAttribute.new do "use-#{ node.a }" end

It's unwieldy a little.

Is any ideas how to humanize it?

--
Daneel S. Yaitskov