Adding has_variable? support, fixing ticket #1177

1 files changed, 9 insertions, 0 deletions

diff --git a/lib/puppet/parser/templatewrapper.rb b/lib/puppet/parser/templatewrapper.rb
index 7a8f74156..4f044befc 100644
--- a/lib/puppet/parser/templatewrapper.rb
+++ b/lib/puppet/parser/templatewrapper.rb
@@ -19,6 +19,15 @@ class Puppet::Parser::TemplateWrapper
             @scope.parser.watch_file(@file)
         end
     end
+    
+    # Should return true if a variable is defined, false if it is not
+    def has_variable?(name)
+      if @scope.lookupvar(name.to_s, false) != :undefined
+        true
+      else
+        false
+      end
+    end
 
     # Ruby treats variables like methods, so we can cheat here and
     # trap missing vars like they were missing methods.