First version. Simple include function to use within Puppet DSL.

Signed-off-by: Krzysztof Wilczynski <krzysztof.wilczynski@linux.com>

include.rb

@@ -0,0 +1,32 @@
+#
+# include.rb
+#
+
+# TODO(Krzysztof Wilczynski): We need to add support for regular expression ...
+
+module Puppet::Parser::Functions
+  newfunction(:include, :type => :rvalue, :doc => <<-EOS
+    EOS
+  ) do |arguments|
+
+    raise(Puppet::ParseError, "include(): Wrong number of arguments " +
+      "given (#{arguments.size} for 2)") if arguments.size < 2
+
+    array = arguments[0]
+
+    if not array.is_a?(Array)
+      raise(Puppet::ParseError, 'include(): Requires an array to work with')
+    end
+
+    item = arguments[1]
+
+    raise(Puppet::ParseError, 'include(): You must provide item ' +
+      'to search for within given array') if item.empty?
+
+    result = array.include?(item)
+
+    return result
+  end
+end
+
+# vim: set ts=2 sw=2 et :