1 files changed, 34 insertions, 0 deletions
diff --git a/lib/puppet/util/tagging.rb b/lib/puppet/util/tagging.rb
new file mode 100644
index 000000000..25d74c420
--- /dev/null
+++ b/lib/puppet/util/tagging.rb
@@ -0,0 +1,34 @@
+# Created on 2008-01-19
+# Copyright Luke Kanies
+
+# A common module to handle tagging.
+module Puppet::Util::Tagging
+    # Add a tag to our current list.  These tags will be added to all
+    # of the objects contained in this scope.
+    def tag(*ary)
+        @tags ||= []
+
+        qualified = []
+
+        ary.collect { |tag| tag.to_s.downcase }.each do |tag|
+            fail(Puppet::ParseError, "Invalid tag %s" % tag.inspect) unless valid_tag?(tag)
+            qualified << tag if tag.include?("::")
+            @tags << tag unless @tags.include?(tag)
+        end
+
+        qualified.collect { |name| name.split("::") }.flatten.each { |tag| @tags << tag unless @tags.include?(tag) }
+    end
+
+    # Return a copy of the tag list, so someone can't ask for our tags
+    # and then modify them.
+    def tags
+        @tags ||= []
+        @tags.dup
+    end
+
+    private
+
+    def valid_tag?(tag)
+        tag =~ /^\w[-\w:]*$/
+    end
+end