Using xxdiff with bazaar

I'm acclimating myself to bazaar, in anticipation of migrating all of my subversion repositories to it in the near future.  One of the first things I desperately needed to do was get bazaar to use xxdiff for diff'ing and merging, since I xxdiff so much.  Turns out it was trivially easy -- much easier than the hoops I had to jump though to get svn to use xxdiff.

I just added the following to my $HOME/.bazaar/bazaar.conf file:

[ALIASES]
diff = diff --using xxdiff

That fixed diff, and the following fixed merges:

[DEFAULT]
external_merge = xxdiff

Aliasing is documented in the bazaar user's guide, but the external_merge option wasn't discovered until I did some googling.  It looks like it started out as a plugin, but is now included natively in bazaar.