From: Johan Herland <johan@herland.net>
To: Junio C Hamano <gitster@pobox.com>
Cc: git@vger.kernel.org
Subject: Re: [RFD] Making "git push [--force/--delete]" safer?
Date: Wed, 3 Jul 2013 08:34:25 +0200 [thread overview]
Message-ID: <CALKQrgdovWTd50LVDnNR+BhurWgSCKkhr88wCo01VZF3sd5PNg@mail.gmail.com> (raw)
In-Reply-To: <CALKQrgenpqKUxOZ+p79NsaQD9M2-q4h93ZqN0oencVo-QZF=zg@mail.gmail.com>
On Wed, Jul 3, 2013 at 12:55 AM, Johan Herland <johan@herland.net> wrote:
> I assume that in most cases the expected value of the remote ref would
> equal the current value of the corresponding remote-tracking ref in
> the user's repo, so why not use that as the default expected value?
> E.g.:
>
> $ git config push.default simple
> $ git checkout -b foo -t origin/foo
> # prepare non-ff update
> $ git push --force-if-expected
> # the above validates foo @ origin != origin/foo before pushing
Oops, typo: s/!=/==/
>
> And if the users expects a different value, (s)he can pass that to the
> same option:
>
> $ git push --force-if-expected=refs/original/foo my_remote HEAD:foo
> # the above fails if foo @ origin != refs/original/foo
>
> The option name probably needs a little work, but as long as it
> properly communicates the user's _intent_ I'm fine with whatever we
> call it.
Overnight, it occured to me that --force-if-expected could be
simplified by leveraging the existing --force option; for the above
two examples, respectively:
$ git push --force --expect
# validate foo @ origin == @{upstream} before pushing
and
$ git push --force --expect=refs/original/foo my_remote HEAD:foo
# validate foo @ my_remote == refs/original/foo before pushing
In other words, the --expect option becomes a modifier on the --force
behaviour: If --expect is given, and the remote ref is not as
expected, then the push will still fail, even when --force is given.
Furthermore, this could be fleshed out by allowing the user to
configure push.expect = True, in which case --expect will be assumed
whenever --force is used, and the user can override with --no-expect.
If push.expect == True (or if --expect is given on command-line
without a parameter), we default to using @{upstream} as the expected
value, and we complain to the user if the current branch has no
upstream. This way, you can still enable push.expect even when you do
not configure @{upstream}, but it compels you to always supply
--expect=$something (or --no-expect) when you use --force.
...Johan
PS: I'm still unsure about the option naming. Maybe --validate would
be better than --expect, but I feel it should convey more strongly
that we're doing _pre_-validation, as opposed to (post-)validating the
_result_ of the push, whatever that would look like.
--
Johan Herland, <johan@herland.net>
www.herland.net
next prev parent reply other threads:[~2013-07-03 6:34 UTC|newest]
Thread overview: 62+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-02 20:57 [RFD] Making "git push [--force/--delete]" safer? Junio C Hamano
2013-07-02 22:55 ` Johan Herland
2013-07-03 6:34 ` Johan Herland [this message]
2013-07-03 8:49 ` Junio C Hamano
2013-07-03 10:00 ` Johan Herland
2013-07-03 10:06 ` Jonathan del Strother
2013-07-03 10:11 ` Johan Herland
2013-07-03 10:50 ` Michael Haggerty
2013-07-03 12:06 ` Johannes Sixt
2013-07-03 19:53 ` Junio C Hamano
2013-07-04 5:37 ` Johannes Sixt
2013-07-04 5:46 ` Junio C Hamano
2013-07-03 19:50 ` Junio C Hamano
2013-07-03 20:18 ` Junio C Hamano
2013-07-03 19:48 ` Junio C Hamano
2013-07-09 19:53 ` [PATCH 0/7] safer "push --force" with compare-and-swap Junio C Hamano
2013-07-09 19:53 ` [PATCH 1/7] cache.h: move remote/connect API out of it Junio C Hamano
2013-07-09 19:53 ` [PATCH 2/7] builtin/push.c: use OPT_BOOL, not OPT_BOOLEAN Junio C Hamano
2013-07-09 19:53 ` [PATCH 3/7] push: beginning of compare-and-swap "force/delete safety" Junio C Hamano
2013-07-09 19:53 ` [PATCH 4/7] remote.c: add command line option parser for --lockref Junio C Hamano
2013-07-16 22:13 ` John Keeping
2013-07-17 17:06 ` Junio C Hamano
2013-07-17 17:09 ` Junio C Hamano
2013-07-09 19:53 ` [PATCH 5/7] push --lockref: implement logic to populate old_sha1_expect[] Junio C Hamano
2013-07-09 19:53 ` [PATCH 6/7] t5533: test "push --lockref" Junio C Hamano
2013-07-09 19:53 ` [PATCH 7/7] push: document --lockref Junio C Hamano
2013-07-09 20:17 ` Aaron Schrab
2013-07-09 20:39 ` Junio C Hamano
2013-07-09 20:24 ` Johannes Sixt
2013-07-09 20:37 ` Junio C Hamano
2013-07-09 20:55 ` Johannes Sixt
2013-07-09 22:09 ` Junio C Hamano
2013-07-09 23:08 ` Junio C Hamano
2013-07-11 21:10 ` Johannes Sixt
2013-07-11 21:57 ` Junio C Hamano
2013-07-11 22:14 ` Junio C Hamano
2013-07-12 17:21 ` Johannes Sixt
2013-07-12 17:40 ` Junio C Hamano
2013-07-12 20:00 ` Johannes Sixt
2013-07-12 21:19 ` Junio C Hamano
2013-07-13 6:52 ` Johannes Sixt
2013-07-13 18:14 ` Junio C Hamano
2013-07-13 20:08 ` Junio C Hamano
2013-07-13 21:11 ` Johannes Sixt
2013-07-14 14:28 ` John Keeping
2013-07-13 20:17 ` Johannes Sixt
2013-07-14 19:17 ` Junio C Hamano
2013-07-14 20:21 ` Johannes Sixt
2013-07-14 20:34 ` Jonathan Nieder
2013-07-14 20:49 ` Jonathan Nieder
2013-07-14 20:59 ` Johannes Sixt
2013-07-14 21:28 ` Jonathan Nieder
2013-07-15 4:10 ` Junio C Hamano
2013-07-15 4:44 ` Jonathan Nieder
2013-07-15 15:37 ` Junio C Hamano
2013-07-15 20:30 ` Johannes Sixt
2013-07-15 3:50 ` Junio C Hamano
2013-07-15 15:47 ` Default expectation of --lockref Junio C Hamano
2013-07-15 20:27 ` [PATCH 7/7] push: document --lockref Johannes Sixt
2013-07-09 21:37 ` Marc Branchaud
2013-07-09 20:27 ` Michael Haggerty
2013-07-09 20:42 ` Junio C Hamano
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