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List:       git
Subject:    Re: [PATCH 10/10] push: teach push to be quiet if local ref is strict subset of remote ref
From:       Junio C Hamano <gitster () pobox ! com>
Date:       2007-10-31 21:31:05
Message-ID: 7vlk9jgeee.fsf () gitster ! siamese ! dyndns ! org
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Steffen Prohaska <prohaska@zib.de> writes:

>> You forgot a lot more important part.  Pushing into publishing
>> repositories.  And the discussion is about git-push command.
>
> Exactly, here are two examples:
>
> If you push only to publishing repositories that are read
> only by others, you'll never encounter the problem that
> 10/10 tried to solve. The publishing repository is never
> changed by others. You are the only one who pushes to this
> repository. Therefore the remote never advances unexpectedly.

Wrong.

People can and do work from more than one private repositories
(I do).  In a sense, that is sharing the repository with
oneself.

I may do an emergency patch to fix breakage on 'maint' (and
'maint' only) from a location that is not my primary development
box and push the fix out.  I fully expect that the push will
push out 'maint' and expect the other branches such as 'master'
on the remote side to stay the same, as I haven't touched
'master' on that box for quite a while and it is now stale.  In
that situation, I _want_ the "git push" itself to report failure
to notify me that it did not push what _I_ asked it to push out,
so that I can be reminded that I'd better do "git push $remote
maint" the next time.  In the meantime, even though it reports
a failure, 'master' on the remote side is _not_ updated, so the
behaviour is still _safe_.

> Another difference is the way changes are integrated. In
> a workflow without shared repositories, only pull is used
> for integration, while push in only used for publishing the
> changes.

Wrong.  push is a mirror of fetch and does not do _any_
integration.  It is just a safe (because it insists on
fast-forward) propagation mechanism.  Your integration still
happens with pull (actually, shared repository people seem to
prefer "fetch + rebase" over "pull" which is "fetch + merge").

> This is different if you work with a shared repository. Bob
> checks out the shared branch foo to his local branch bar and
> later he needs to push bar back to the shared branch foo. Bob
> needs to push changes from his local branch bar to the branch
> foo in the remote repository, a branch with a different name.
> This need does not emerge when working with two publishing
> repositories, as described above.

So you do "git push $remote bar:foo".  If you do that regulary,
there are configuration mechanisms to help you reduce your
keyboard wear.  What's the problem?
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