Support optional pluginstm/disable_noisy_neighbours

Some plugins are useful enough to ship in Ohai, but should be off by
default. Those plugins can be (and are) marked as optional. Implements
RFC 103

Signed-off-by: Thom May <thom@chef.io>

1 files changed, 4 insertions, 0 deletions

diff --git a/lib/ohai/runner.rb b/lib/ohai/runner.rb
index ba3985dc..6f623d38 100644
--- a/lib/ohai/runner.rb
+++ b/lib/ohai/runner.rb
@@ -59,6 +59,10 @@ module Ohai
     end
 
     def run_v7_plugin(plugin)
+      return true if plugin.optional? &&
+          !Ohai.config[:run_all_plugins] &&
+          !Ohai.config[:optional_plugins].include?(plugin.name)
+
       visited = [ plugin ]
       until visited.empty?
         next_plugin = visited.pop