plugin dependencies

[Giovanni Bechis]

Hi,
for something I am working on I need a dependency between my new code and DKIM.
DKIM sets a tag only if the signature is valid, so using 
$pms->action_depends_on_tags doesn't always work.
Atm I added a new DKIMCHECKDONE tag on my tree which will be always populated 
even if no DKIM tag is present.
Any other options to do that ? What about all other plugins ? Should we do this 
where needed or should we write a general, different solution ?

 Regards
  Giovanni

Index: lib/Mail/SpamAssassin/Plugin/DKIM.pm
===================================================================
--- lib/Mail/SpamAssassin/Plugin/DKIM.pm        (revision 1876746)
+++ lib/Mail/SpamAssassin/Plugin/DKIM.pm        (working copy)
@@ -971,6 +971,7 @@
     } else {
       dbg("dkim: signature verification result: none");
     }
+    $pms->set_tag('DKIMCHECKDONE', 1);
   }
 }