[[chef-dev]] Re: [[chef-dev]] Modifying the solaris2 Ohai plugin.

[Daniel DeLeo < >]

On Wednesday, July 20, 2011 at 7:55 PM, Jason J. W. Williams wrote:
> I'm trying to modify the platform.rb module of the Ohai Solaris2
> plugin in order to extend it to detect the various distributions of
> Solaris (Solaris/Solaris Express, OpenIndiana, Nexenta, etc.).
> However, if I modify the file:
> 
> /usr/lib/ruby/gems/1.9.1/gems/ohai-0.6.4/lib/ohai/plugins/solaris2/platform.rb
> 
> ...my changes don't seem to take effect. I've even tried adding:
> platform "test123"
> 
> However the platform still indicates "solaris2" when I run Ohai. This
> appears to be from the line:
> 
> platform os unless attribute?("platform")
I think you're getting confused by if/unless here:

platform os unless attribute?("platform")
platform os if (not (attribute?("platform"))
platform os if (not ( false ) )
platform os if ( true )
platform os

> 
> in /usr/lib/ruby/gems/1.9.1/gems/ohai-0.6.4/lib/ohai/plugins/platform.rb,
> because attribute?("platform") is evaluating to false. It appears that
> Ohai isn't running platform.rb in the solaris2 plugin at all. Any
> pointers are greatly appreciated.
> 
> -J
Not sure how else to help except for some general tips:

* don't be afraid of "printf debugging". Add puts statements everywhere.
* for structured data, require 'pp' and then use pp for your printf debugging
* try it running ohai from the command line if you're not already

Good luck

-- 
Dan DeLeo