The following doesn't work in darcs > 2.2 but did in 2.1:

  $ darcs --version
  2.2.0 (release)
  $ darcs annotate --repodir /some/repodir '.'

  darcs failed:  There is no file or directory named '.'

Also, the following throws an exception, although I am pretty sure
it is not considered legal input:

  $ darcs annotate --repodir /some/repodir ''

  darcs failed:  Pattern match failure in do expression at src/Darcs/ 
Commands/Annotate.lhs:159:2-26

Changing to the directory works:

  $ cd /some/repodir
  $ darcs annotate '.'
  $ darcs annotate '' # fails, but i consider that expected behaviour.

Regards,
Florian Gilcher

I'd like somebody eventually to mentor Florian in fixing this if he's still up
for it.  Thanks

Looks like this is biting the Redmine folks.
http://www.redmine.org/boards/2/topics/11517?r=11863#message-11863

Let's see if we can work on this during the Zurich sprint (of course, if
any of the Redmine team would like to roll up their sleeves for some
minor Haskell hacking, even better!)

The following patch updated the status of issue1473 to be resolved:

* Resolve issue1473: annotate command accepts "." and treats "" as invalid input 
Ignore-this: 5faea0580f9cf17ee59964a509f90613

The following patch updated the status of issue1473 to be resolved-in-stable:

* Resolve issue1473: annotate command accepts "." and treats "" as invalid input 
Ignore-this: 5faea0580f9cf17ee59964a509f90613

The following patch sent by Florent Becker <florent.becker@ens-lyon.org> updated issue issue1473 with
status=resolved;resolvedin=2.8.0 HEAD

* resolve issue1473 : annotate --repodir works now 
Ignore-this: d73caad407b4f517b7f3a7221d799384

This is just observing that the bug has already been resolved, presumably
by the new annotate code.