1 files changed, 29 insertions, 0 deletions
diff --git a/prefix.rb b/prefix.rb
new file mode 100644
index 0000000..bf3690d
--- /dev/null
+++ b/prefix.rb
@@ -0,0 +1,29 @@
+#
+# prefix.rb
+#
+
+module Puppet::Parser::Functions
+  newfunction(:prefix, :type => :rvalue, :doc => <<-EOS
+    EOS
+  ) do |arguments|
+
+    # Technically we support two arguments but only first is mandatory ...
+    raise(Puppet::ParseError, "prefix(): Wrong number of arguments " +
+      "given (#{arguments.size} for 1)") if arguments.size < 1
+
+    array = arguments[0]
+
+    if not array.is_a?(Array)
+      raise(Puppet::ParseError, 'prefix(): Requires an array to work with')
+    end
+
+    prefix = arguments[1] if arguments[1]
+
+    result = array.collect { |i| prefix ? prefix + i : i }
+
+    return result
+  end
+end
+
+# vim: set ts=2 sw=2 et :
+