[chef] Re: Re: updated_by_last action from a resource inside a LWP

[Phil Dibowitz < >]

On 07/15/2012 06:05 PM, Peter Donald wrote:
> Hi,
> 
> On Mon, Jul 16, 2012 at 6:06 AM,  
> <
 >
>  wrote:
>> If I have a lightweight provider that is calling other resources, and I'd 
>> like
>> to know if the resource I called modified anything, so that I can pass that
>> information along... is there a way to do that?
>>
>> E.G.
>>
>> If I am calling the template resource inside my own custom provider, is 
>> there a
>> way to determine if it has called updated_by_last_action so that I can then
>> call updated_by_last_action on my new_resource?
> 
> Unfortunately you have hit one of the biggest pain points I have found
> with Chef. There is no way I have found to do this as they are
> separate run contexts. I have tried all sorts of hackery to try to get
> this working but I don't think it is possible without monkey patching
> the core ... which I have yet to get to. It does mean that resources
> are not composable but mostly they are still a better option than
> definitions. It would be nice to have some way to be able to notify
> the containing resource when things have changed.

(I'm just postulating here)...

I *think* you should be able to do this if you force the resource you're
creating to be executed immediately

t = template '...' do
  ...
  action :nothing
end

t.run_action(:run)

# updated_by_last_action should be valid here.

Since the execution of your LWRP is done a "run time", so would this (but
would be at the same time as your LWRP, not much late as if you didn't do 
this).

Disclaimer: I haven't tried this, I'm just riffing based on what I recall from
the core.

-- 
Phil Dibowitz                             

 
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