1 files changed, 29 insertions, 0 deletions
diff --git a/lib/puppet/parser/functions/assert_private.rb b/lib/puppet/parser/functions/assert_private.rb
new file mode 100644
index 0000000..66c79cc
--- /dev/null
+++ b/lib/puppet/parser/functions/assert_private.rb
@@ -0,0 +1,29 @@
+#
+# assert_private.rb
+#
+
+module Puppet::Parser::Functions
+  newfunction(:assert_private, :doc => <<-'EOS'
+    Sets the current class or definition as private.
+    Calling the class or definition from outside the current module will fail.
+    EOS
+  ) do |args|
+
+    raise(Puppet::ParseError, "assert_private(): Wrong number of arguments "+
+      "given (#{args.size}}) for 0 or 1)") if args.size > 1
+
+    scope = self
+    if scope.lookupvar('module_name') != scope.lookupvar('caller_module_name')
+      message = nil
+      if args[0] and args[0].is_a? String
+        message = args[0]
+      else
+        manifest_name = scope.source.name
+        manifest_type = scope.source.type
+        message = (manifest_type.to_s == 'hostclass') ? 'Class' : 'Definition'
+        message += " #{manifest_name} is private"
+      end
+      raise(Puppet::ParseError, message)
+    end
+  end
+end