Vim command mode complete word

Question

Is there a way to get Vim in command mode to complete words from the current file? Say I have this file:

one
two
three
once

and I enter command line mode

:myruncommand o|

where | denotes the cursor position. How do I make Vim complete one or once when pressing Tab?

Answer 1

It's not possible natively, but it took about one minute to find this script and this one on vim.org.