[chef] Checking existence of included recipe

[Anthony Goddard < >]

Hi chefs,
We had some discussion on IRC about this a few days ago, thought I might 
throw my thoughts to the list.

I have two recipes which include the rabbitmq::server recipe (sensu::rabbitmq 
and logstash::broker [1][2]), and a bunch of nodes which have rabbitmq-server 
installed by these. I have a new cookbook which needs to check whether the 
rabbitmq::server recipe was run on the node, ordinarily I could do `if 
node[:recipes].include?("rabbitmq::default")` but in this case, 
rabbitmq::default isn't in the node's recipes because it's installed by the 
include statement in the sensu/logstash recipes.

jtimberman helpfully pointed out that node.run_state[:seen_recipes] will be 
populated with all of the recipes as the run progresses, though in order for 
this to work, I'd have to make sure the cookbook with the dependency is run 
at the end of the run. Am I missing a really obvious way of doing this 
dependency check for a recipe that's included with `include_recipe`?


Cheers,
Ant


[1] 
https://github.com/agoddard/sensu-cookbooks/blob/master/sensu/recipes/rabbitmq.rb
[2] 
https://github.com/agoddard/logstash-cookbook/blob/master/recipes/broker.rb


---
Anthony Goddard
Woods Hole Marine Biological Laboratory