Dfyjkt

There is no access to os.windows? in a chef library, whereas in a recipe it is available. I thought it might be possible to get it by adding a require 'os' line to my library to make it available.

require 'os'

module Project
 module Helper
 # ...
 def serviceExists?(service_name)
 if os.windows?
 puts 'Windows detected'
 # ... etc ...
 else
 raise 'Unimplemented..'
 end
 end
 # ...
 end
end 

This didn't work. Instead I received an error:

LoadError
---------
cannot load such file -- os

Is it possible to access the os variable or determine the operating system in a library without passing os as a parameter to the method? I was hoping to handle the os complexities in the library to keep the recipe cleaner.

I'm calling the code via the following not_if statement.

batch "Install #service_name service" do
 extend Project::Helper
 cwd install_home
 code <<-EOH
 @echo off
 call "installSvc.cmd"
 EOH
 not_if serviceExists?(service_name) 
end

I changed approach slightly instead of trying to access the os object directly, I instead used the node object via a 'mixin'.

require 'win32/service'

module Project
 module Helper
 def serviceExists?(service_name)
 if node['os'].include?('windows')
 Win32::Service.exists?(service_name)
 else 
 raise 'Checking for services under this platform is not implemented yet.'
 end
 end
 end
end

Chef::Recipe.send(:include, Project::Helper)
Chef::Resource.send(:include, Project::Helper)

use ohai...

install it using gem_package resource and then leverage ohai:

require 'ohai'
ohai = Ohai::System.new
ohai.all_plugins
os = ohai[:kernel][:os].downcase