Fix #1115 - Allow checking tags/classes from ERb templates

Add to predefined variables to the ERB template space. "classes"
and "tags" which provide arrays of all the defined classes and tags
for a node.

Signed-off-by: Brice Figureau <brice-puppet@daysofwonder.com>

1 files changed, 10 insertions, 0 deletions

diff --git a/lib/puppet/parser/templatewrapper.rb b/lib/puppet/parser/templatewrapper.rb
index 3b74e62d4..fc716b0fd 100644
--- a/lib/puppet/parser/templatewrapper.rb
+++ b/lib/puppet/parser/templatewrapper.rb
@@ -37,6 +37,16 @@ class Puppet::Parser::TemplateWrapper
         end
     end
 
+    # Allow templates to access the defined classes
+    def classes
+        return scope.catalog.classes
+    end
+
+    # Allow templates to access the defined tags
+    def tags
+        return scope.catalog.tags
+    end
+
     # Ruby treats variables like methods, so we used to expose variables
     # within scope to the ERB code via method_missing.  As per RedMine #1427,
     # though, this means that conflicts between methods in our inheritance