push and svn/hpss/vfs
robert.collins at canonical.com
Thu Apr 16 04:50:47 BST 2009
Hi Jelmer, I'm working on reducing round trips in push.
I want to check I understand bzr-svn's needs correctly. AIUI you need to
never 'just make' a branch, rather you need to *either* push to an
existing branch, or 'push a new branch'.
I want to reduce the churn on objects by creating a branch object
remotely and holding onto the object thereafter rather than reopening
I want to have a helper function which does not take anything that we
can't pass to a remote function, so that it can do (psuedo code):
return transport.get_smart_client._call('give me a branch', *args)
return give_me_a_branch_helper(transport, *args)
But it seems like that will conflict with your needs, as you can only
support open-or-fail, not open-or-create.
So I'm wondering if this function were to return a tuple:
Then, the show_push code would do:
to_dir, to_branch = get_a_branch(....)
if to_branch is None:
to_dir.push_branch(....) #btw, confusingly named
The way I'm thinking this would work for svn is that the helper would
always return None for to_branch on svn transports.
Or we could reevaluate InterBranch.push()
I appreciate that svn must work off the control dir, but for bzr that is
bad because it requires extra round trips.
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