From: Duy Nguyen <pclouds@gmail.com>
To: "Ævar Arnfjörð Bjarmason" <avarab@gmail.com>
Cc: Jeff King <peff@peff.net>, Jonathan Nieder <jrnieder@gmail.com>,
"brian m. carlson" <sandals@crustytoothpaste.net>,
Git Mailing List <git@vger.kernel.org>,
Johannes Schindelin <Johannes.Schindelin@gmx.de>,
Barret Rhoden <brho@google.com>, Olaf Hering <olaf@aepfle.de>
Subject: Re: How to undo previously set configuration? (again)
Date: Wed, 1 May 2019 19:32:20 +0700 [thread overview]
Message-ID: <CACsJy8CSPBbxrJm1sh4a+f_B03MFXxDXSrOvb6yFCRa4Qa2wMQ@mail.gmail.com> (raw)
In-Reply-To: <87r29iqsf9.fsf@evledraar.gmail.com>
On Wed, May 1, 2019 at 7:18 PM Ævar Arnfjörð Bjarmason <avarab@gmail.com> wrote:
>
>
> On Wed, May 01 2019, Duy Nguyen wrote:
>
> > On Wed, May 1, 2019 at 4:14 AM Jeff King <peff@peff.net> wrote:
> >> It's definitely not implemented universally; each consumer of the config
> >> option must decide on it (and it will probably always be that way to
> >> some degree, since we don't know the semantics of each options; recall
> >> that we may be holding config keys for other non-core programs, too).
> >> And we just haven't retro-fitted a lot of those older options because
> >> nobody has been bothered by it.
> >>
> >> That said, I am a proponent of having some kind of clearing mechanism
> >> (and I was the one who added credential.helper's mechanism, which has
> >> been mentioned in this thread). I think it makes things a lot less
> >> difficult if we don't have to change the syntax of the config files to
> >> do it. With that constraint, that pretty much leaves:
> >>
> >> 1. Some sentinel value like the empty string. That one _probably_
> >> works in most cases, but there may be lists which want to represent
> >> the empty value. There could be other sentinel values (e.g.,
> >> "CLEAR") which are simply unlikely to be used as real values.
> >>
> >> 2. The boolean syntax (i.e., "[foo]bar" with no equals) is almost
> >> always bogus for a list. So that can work as a sentinel that is
> >> OK syntactically.
> >
> > Another question about the universal clearing mechanism, how does "git
> > config" fit into this? It would be great if the user can actually see
> > the same thing a git command sees to troubleshoot. Option 1 leaves the
> > interpretation/guessing to the user, "git config" simply gives the raw
> > input list before "clear" is processed. Option 2, "git config"
> > probably can be taught to optionally clear when it sees the boolean
> > syntax.
>
> We can make it fancier, but we already deal with this, e.g. if you do
> "git config -l" we'll show "include{,if}" directives at the same "level"
> as other "normal" keys.
>
> We also provide no way in "git config" to properly interpret a
> value. E.g. does a "user.email" showing up twice for me mean I have two
> E-Mails at the same time, or does the last one win?
Actually --get knows this. Single-valued options can be handled
correctly quite easily. It's --get-all (or rather, the future
--get-multi because we can't change --get-all's behavior) which can't
interpret values because there's no standardized way of doing it.
> We both know the
> answer, but git-config itself doesn't, and that information lives in
> docs/code outside of it.
>
> Similarly we'd just print a sequence of:
>
> user.name=foo
> user.email=bar
> exclude.key=user.*
> user.name=baz
>
> And it would be up to some "smarter" reader of the config data to
> realize that the end result is one where we have no "user.email" set,
> and "user.name=baz".
>
> But yeah, optionally having some new --list-normalized or
> --list-after-excludes or whatever would be great, and presumably not
> hard if we had some central "excludes" mechanism...
--
Duy
next prev parent reply other threads:[~2019-05-01 12:32 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-24 0:49 [PATCH 0/5] Multiple hook support brian m. carlson
2019-04-24 0:49 ` [PATCH 1/5] run-command: add preliminary support for multiple hooks brian m. carlson
2019-04-24 2:27 ` Junio C Hamano
2019-04-24 18:48 ` Johannes Sixt
2019-04-25 0:55 ` Junio C Hamano
2019-04-25 9:39 ` Ævar Arnfjörð Bjarmason
2019-04-25 10:04 ` Junio C Hamano
2019-04-25 19:40 ` Johannes Sixt
2019-04-26 20:58 ` brian m. carlson
2019-04-26 21:53 ` Johannes Sixt
2019-04-24 22:32 ` brian m. carlson
2019-04-24 0:49 ` [PATCH 2/5] builtin/receive-pack: add " brian m. carlson
2019-04-24 0:49 ` [PATCH 3/5] sequencer: " brian m. carlson
2019-04-24 9:51 ` Phillip Wood
2019-04-24 22:46 ` brian m. carlson
2019-04-25 14:59 ` Phillip Wood
2019-04-24 0:49 ` [PATCH 4/5] builtin/worktree: add support for multiple post-checkout hooks brian m. carlson
2019-04-24 0:49 ` [PATCH 5/5] transport: add support for multiple pre-push hooks brian m. carlson
2019-04-24 2:09 ` [PATCH 0/5] Multiple hook support Junio C Hamano
2019-04-24 2:22 ` brian m. carlson
2019-04-24 2:41 ` Junio C Hamano
2019-04-24 8:14 ` Ævar Arnfjörð Bjarmason
2019-04-24 2:34 ` Jonathan Nieder
2019-04-24 7:43 ` Ævar Arnfjörð Bjarmason
2019-04-24 8:22 ` Ævar Arnfjörð Bjarmason
2019-04-24 23:07 ` brian m. carlson
2019-04-24 23:26 ` Jonathan Nieder
2019-04-25 10:08 ` How to undo previously set configuration? (again) Ævar Arnfjörð Bjarmason
2019-04-25 10:43 ` Duy Nguyen
2019-04-25 11:58 ` Ævar Arnfjörð Bjarmason
2019-04-26 15:18 ` Ævar Arnfjörð Bjarmason
2019-04-25 14:36 ` Jonathan Nieder
2019-04-25 14:43 ` Barret Rhoden
2019-04-25 15:27 ` Ævar Arnfjörð Bjarmason
2019-04-25 15:25 ` Ævar Arnfjörð Bjarmason
2019-04-26 2:13 ` Junio C Hamano
2019-04-26 9:36 ` Duy Nguyen
2019-04-30 21:14 ` Jeff King
2019-05-01 11:41 ` Duy Nguyen
2019-05-01 12:18 ` Ævar Arnfjörð Bjarmason
2019-05-01 12:32 ` Duy Nguyen [this message]
2019-05-01 21:09 ` Jeff King
2019-05-01 21:15 ` Jeff King
2019-04-24 8:10 ` [PATCH 0/5] Multiple hook support Ævar Arnfjörð Bjarmason
2019-04-24 9:55 ` Phillip Wood
2019-04-24 18:29 ` Bryan Turner
2019-04-24 9:49 ` Duy Nguyen
2019-04-24 22:49 ` brian m. carlson
2019-04-24 23:40 ` brian m. carlson
2019-04-25 0:08 ` Duy Nguyen
2019-04-30 21:39 ` Jeff King
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