Repository size . . . is this right

[Stephen J. Turnbull]

Robert Collins writes:

 > On Tue, 2008-12-09 at 17:04 +0000, Matt Nordhoff wrote:
 > 
 > > If you run "bzr pack" twice without committing or pulling or
 > > adding new revisions in any other way, it will exit without doing
 > > anything.

This is good behavior.  A revision control system should have no
operations that implicitly reduce the size of the repository, which
implies throwing out data (even if it's redundant).  By repo, I mean
"excluding the working tree."  Obviously checking out an old version
might reduce that.

 > I'd support having 'bzr pack && bzr pack' leave an empty
 > obsolete_packs directory. I also completely agree that the current
 > behaviour confuses people and thats *not good*. However, safety is
 > really important too.

I think there should be a separate command, bzr garbage-collect, or
maybe even bzr clean, perhaps with options for how aggressively it
classifies stuff as garbage.