1 files changed, 35 insertions, 0 deletions
diff --git a/lib/puppet/parser/functions/getparam.rb b/lib/puppet/parser/functions/getparam.rb
new file mode 100644
index 0000000..6d51006
--- /dev/null
+++ b/lib/puppet/parser/functions/getparam.rb
@@ -0,0 +1,35 @@
+# Test whether a given class or definition is defined
+require 'puppet/parser/functions'
+
+Puppet::Parser::Functions.newfunction(:getparam,
+                                      :type => :rvalue,
+                                      :doc => <<-'ENDOFDOC'
+Takes a resource reference and name of the parameter and
+returns value of resource's parameter.
+
+*Examples:*
+
+    define example_resource($param) {
+    }
+
+    example_resource { "example_resource_instance":
+        param => "param_value"
+    }
+
+    getparam(Example_resource["example_resource_instance"], "param")
+
+Would return: param_value
+ENDOFDOC
+) do |vals|
+  reference, param = vals
+  raise(ArgumentError, 'Must specify a reference') unless reference
+  raise(ArgumentError, 'Must specify name of a parameter') unless param and param.instance_of? String
+
+  return '' if param.empty?
+
+  if resource = findresource(reference.to_s)
+    return resource[param] if resource[param]
+  end
+
+  return ''
+end