[MERGE/RFC] Use Branch.pull() to update master branch.

[Robert Collins]

On Wed, 2009-02-25 at 17:52 +0100, Jelmer Vernooij wrote:
> The attached patch makes the commit code use Branch.pull() to update the
> master branch when committing to a bound branch. 
> 
> This is required for bzr-svn as it can't update just the repository, it
> has to update the branch as well. Previously it had some magic in the
> Repository.fetch() code to handle this, but that is vulnerable to race
> conditions. (#248289)
> 
> Is Branch.pull() the right call here, or should I be adding something
> custom?

Pull is almost certainly not the right method. You're either pushing, or
perhaps just update_revisions.

The key question will be what hooks do you want to fire.

-Rob
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