[Python-Dev] Looking for VCS usage scenarios

Thomas Wouters thomas at python.org
Mon Nov 3 19:35:06 CET 2008

On Mon, Nov 3, 2008 at 18:57, Brett Cannon <brett at python.org> wrote:

> On Sun, Nov 2, 2008 at 17:08, Gustavo Niemeyer <gustavo at niemeyer.net>
> wrote:
> > Hi Brett,
> >
> >> At this point I am looking for any suggestions for fundamental usage
> >> scenarios that I am missing from the PEP. If you think the few already
> >> listed are missing some core part of a VCS, please let me know.
> >
> > As an initial disclaimer, I use bzr in my daily routine.  That said,
> > I'm sending below a few mostly unbiased high-level ideas, just based
> > on useful ways we explore the DVCS-aspect on our normal daily
> > workflow.
> >
> > == Coordinated development with dependent features ==
> >
> > A variation on coordinated development, which is actually one of the
> > main motivators for DVCS.  Branch A is evolving out of the mainline,
> > and it depends on a feature that is on branch B which is also not yet
> > integrated.  Parallel development of both should be nicely supported.
> > I'm sure all DVCS will do that in a decent form, but figuring how this
> > works may be instructive and worth mentioning.
> >
> Since I have never seen that come up during Python's development I am
> going to leave it out. But I do see the benefit and how it might help
> with future work.

Euhm, wut? It hasn't come up during Python's development because Python is
being developed in a VCS with very limited branches :) I'm partial to VCS's
with proper branching (as you know) and I've been using that mode of
development for many years. I've done development and maintenance of
multi-developer projects using both the CVS/SVN nonbranching approach and
the typical DVCS branch-often approach using BitKeeper, Bazaar and Mercurial
(as well as the sort-of one-off-branch Perforce approach where you can
easily 'wrap' a single change but can't really do dependant changes) -- and
whenever possible I use the branch-often approach with dependant branches
all over the place, especially when working on large, complicated changes.
Building them up out of separate 'components' requires a little more
administration (you have to remember which branch to submit to) but it makes
debugging, piecemeal discussion and batchwise integration a *lot* easier.

Thomas Wouters <thomas at python.org>

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