1 files changed, 75 insertions, 0 deletions
diff --git a/lib/chef/provider/lwrp_base.rb b/lib/chef/provider/lwrp_base.rb
new file mode 100644
index 0000000000..54ba23e728
--- /dev/null
+++ b/lib/chef/provider/lwrp_base.rb
@@ -0,0 +1,75 @@
+#
+# Author:: Adam Jacob (<adam@opscode.com>)
+# Author:: Christopher Walters (<cw@opscode.com>)
+# Copyright:: Copyright (c) 2008, 2009 Opscode, Inc.
+# License:: Apache License, Version 2.0
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+require 'chef/provider'
+
+class Chef
+  class Provider
+
+    # == Chef::Provider::LWRPBase
+    # Base class from which LWRP providers inherit.
+    class LWRPBase < Provider
+
+      extend Chef::Mixin::ConvertToClassName
+      extend Chef::Mixin::FromFile
+
+      include Chef::DSL::Recipe
+
+      # These were previously provided by Chef::Mixin::RecipeDefinitionDSLCore.
+      # They are not included by its replacment, Chef::DSL::Recipe, but
+      # they may be used in existing LWRPs.
+      include Chef::DSL::PlatformIntrospection
+      include Chef::DSL::DataQuery
+
+      def self.build_from_file(cookbook_name, filename, run_context)
+        provider_name = filename_to_qualified_string(cookbook_name, filename)
+
+        # Add log entry if we override an existing light-weight provider.
+        class_name = convert_to_class_name(provider_name)
+
+        if Chef::Provider.const_defined?(class_name)
+          Chef::Log.info("#{class_name} light-weight provider already initialized -- overriding!")
+        end
+
+        provider_class = Class.new(self)
+        provider_class.class_from_file(filename)
+
+        class_name = convert_to_class_name(provider_name)
+        Chef::Provider.const_set(class_name, provider_class)
+        Chef::Log.debug("Loaded contents of #{filename} into a provider named #{provider_name} defined in Chef::Provider::#{class_name}")
+
+        provider_class
+      end
+
+      # DSL for defining a provider's actions.
+      def self.action(name, &block)
+        define_method("action_#{name}") do
+          instance_eval(&block)
+        end
+      end
+
+      # no-op `load_current_resource`. Allows simple LWRP providers to work
+      # without defining this method explicitly (silences
+      # Chef::Exceptions::Override exception)
+      def load_current_resource
+      end
+
+    end
+  end
+end