diff options
Diffstat (limited to 'lib/chef/resource.rb')
| -rw-r--r-- | lib/chef/resource.rb | 50 |
1 files changed, 49 insertions, 1 deletions
diff --git a/lib/chef/resource.rb b/lib/chef/resource.rb index dca0033409..cdb351f643 100644 --- a/lib/chef/resource.rb +++ b/lib/chef/resource.rb @@ -1375,6 +1375,34 @@ class Chef end # + # Define a method to load up this resource's properties with the current + # actual values. + # + # @param load_block The block to load. Will be run in the context of a newly + # created resource with its identity values filled in. + # + def self.load_current_value(&load_block) + define_method(:load_current_value!, &load_block) + end + + # + # Get the current actual value of this resource. + # + # This does not cache--a new value will be returned each time. + # + # @return A new copy of the resource, with values filled in from the actual + # current value. + # + def current_resource + provider = provider_for_action(Array(action).first) + if provider.whyrun_mode? && !provider.whyrun_supported? + raise "Cannot retrieve #{self.class.current_resource} in why-run mode: #{provider} does not support why-run" + end + provider.load_current_resource + provider.current_resource + end + + # # The action provider class is an automatic `Provider` created to handle # actions declared by `action :x do ... end`. # @@ -1415,7 +1443,27 @@ class Chef include_resource_dsl true define_singleton_method(:to_s) { "#{resource_class} action provider" } define_singleton_method(:inspect) { to_s } - define_method(:load_current_resource) {} + define_method(:load_current_resource) do + if new_resource.respond_to?(:load_current_value!) + current_resource = new_resource.dup + + # We clear desired state in the copy, because it is supposed to be actual state. + # We keep identity properties and non-desired-state, which are assumed to be + # "control" values like `recurse: true` + current_resource.class.properties.each do |name,property| + if property.desired_state? && !property.identity? && !property.name_property? + property.reset(current_resource) + end + end + + if current_resource.method(:load_current_value!).arity > 0 + current_resource.load_current_value!(new_resource) + else + current_resource.load_current_value! + end + end + @current_resource = current_resource + end end end |