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(imported from commit b2f581280dc7877051ef79d86eac671bfd455ace)

puppet/stdlib/lib/facter/util/puppet_settings.rb

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+module Facter
+  module Util
+    module PuppetSettings
+      # This method is intended to provide a convenient way to evaluate a
+      # Facter code block only if Puppet is loaded.  This is to account for the
+      # situation where the fact happens to be in the load path, but Puppet is
+      # not loaded for whatever reason.  Perhaps the user is simply running
+      # facter without the --puppet flag and they happen to be working in a lib
+      # directory of a module.
+      def self.with_puppet
+        begin
+          Module.const_get("Puppet")
+        rescue NameError
+          nil
+        else
+          yield
+        end
+      end
+    end
+  end
+end