Ack: Using --add-type with v. 2.04

Question

How do I add a new filetype to ack, with version 2.04 (ack-2.04-single-file). I am using the following command (Is there any way to search in filetypes not recognized by ack?), but I receive an error.

$ ack --type-set=input=.i
ack-2.04-single-file: No regular expression found.

Answer 1

Using the following does what I wanted:

--type-add=input:ext:i

I found the answer by creating a .ackrc file with:

ack --create-ackrc