From 1d25d780a69ebc118494939a8d315f6ec6d9ad3f Mon Sep 17 00:00:00 2001
From: Jay Mundrawala <jdmundrawala@gmail.com>
Date: Tue, 30 Jun 2015 09:40:17 -0700
Subject: Revert "Merge pull request #3603 from chef/jdm/lwrp-base"

This reverts commit 27d8675ec1c80f1eb7ec57f7b6c854441bb395ee, reversing
changes made to 3501ba4020dc21377bc999e57e25eadb315ec783.
---
 lib/chef/resource.rb | 53 +++++++++++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 50 insertions(+), 3 deletions(-)

(limited to 'lib/chef/resource.rb')

diff --git a/lib/chef/resource.rb b/lib/chef/resource.rb
index 7965068037..0abf874044 100644
--- a/lib/chef/resource.rb
+++ b/lib/chef/resource.rb
@@ -1499,9 +1499,56 @@ class Chef
         Chef::Resource.send(:remove_const, class_name)
       end
 
-      Chef::Resource.const_set(class_name, resource_class)
-
-      deprecated_constants[class_name.to_sym] = resource_class
+      # In order to generate deprecation warnings when you use Chef::Resource::MyLwrp,
+      # we make a special subclass (identical in nearly all respects) of the
+      # actual LWRP.  When you say any of these, a deprecation warning will be
+      # generated:
+      #
+      # - Chef::Resource::MyLwrp.new(...)
+      # - resource.is_a?(Chef::Resource::MyLwrp)
+      # - resource.kind_of?(Chef::Resource::MyLwrp)
+      # - case resource
+      #   when Chef::Resource::MyLwrp
+      #   end
+      #
+      resource_subclass = Class.new(resource_class) do
+        resource_name nil # we do not actually provide anything
+        def initialize(*args, &block)
+          Chef::Log.deprecation("Using an LWRP by its name (#{self.class.name}) directly is no longer supported in Chef 13 and will be removed.  Use Chef::Resource.resource_for_node(node, name) instead.")
+          super
+        end
+        def self.resource_name(*args)
+          if args.empty?
+            @resource_name ||= superclass.resource_name
+          else
+            super
+          end
+        end
+        self
+      end
+      eval("Chef::Resource::#{class_name} = resource_subclass")
+      # Make case, is_a and kind_of work with the new subclass, for backcompat.
+      # Any subclass of Chef::Resource::ResourceClass is already a subclass of resource_class
+      # Any subclass of resource_class is considered a subclass of Chef::Resource::ResourceClass
+      resource_class.class_eval do
+        define_method(:is_a?) do |other|
+          other.is_a?(Module) && other === self
+        end
+        define_method(:kind_of?) do |other|
+          other.is_a?(Module) && other === self
+        end
+      end
+      resource_subclass.class_eval do
+        define_singleton_method(:===) do |other|
+          Chef::Log.deprecation("Using an LWRP by its name (#{class_name}) directly is no longer supported in Chef 13 and will be removed.  Use Chef::Resource.resource_for_node(node, name) instead.")
+          # resource_subclass is a superclass of all resource_class descendants.
+          if self == resource_subclass && other.class <= resource_class
+            return true
+          end
+          super(other)
+        end
+      end
+      deprecated_constants[class_name.to_sym] = resource_subclass
     end
 
     def self.deprecated_constants
-- 
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