From: Jeff King <peff@peff.net>
To: Duy Nguyen <pclouds@gmail.com>
Cc: timschumi@gmx.de, "Git Mailing List" <git@vger.kernel.org>,
"Junio C Hamano" <gitster@pobox.com>,
"Ævar Arnfjörð Bjarmason" <avarab@gmail.com>
Subject: Re: [RFC PATCH v4 2/3] Show the call history when an alias is looping
Date: Sat, 8 Sep 2018 12:29:09 -0400 [thread overview]
Message-ID: <20180908162908.GC9016@sigill.intra.peff.net> (raw)
In-Reply-To: <CACsJy8C+VPGyu1D6yeFU3eqzwusv_Q=tobZgvXOtZ=5gYak5dg@mail.gmail.com>
On Sat, Sep 08, 2018 at 03:34:34PM +0200, Duy Nguyen wrote:
> On Sat, Sep 8, 2018 at 12:44 AM Tim Schumacher <timschumi@gmx.de> wrote:
> >
> > Just printing the command that the user entered is not particularly
> > helpful when trying to find the alias that causes the loop.
> >
> > Print the history of substituted commands to help the user find the
> > offending alias. Mark the entrypoint of the loop with "<==" and the
> > last command (which looped back to the entrypoint) with "==>".
>
> An even simpler way to give this information is simply suggest the
> user tries again with GIT_TRACE=1. All alias expansion is shown there
> and we teach the user about GIT_TRACE. But your approach is probably
> more user friendly.
Good point. I'm OK with the amount of code here for the nicer message
(but would be happy either way).
If we were going to track cross-process loops like Ævar suggested, I
think I'd rather go with a simple counter and just ask the user to run
with GIT_TRACE when it exceeds some maximum sanity value. For two
reasons:
1. Passing a counter through the environment is way simpler than
an arbitrarily-sized list.
2. When you get into multiple processes, there's potentially more
going on than just Git commands. You might have a git command which
runs a hook which runs a third party script which runs a git
command, which runs a hook, and so on. That full dump is going to
be more useful.
-Peff
next prev parent reply other threads:[~2018-09-08 16:29 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-05 8:54 [RFC PATCH v2] Allow aliases that include other aliases Tim Schumacher
2018-09-05 15:48 ` Duy Nguyen
2018-09-05 19:02 ` Tim Schumacher
2018-09-05 17:12 ` Junio C Hamano
2018-09-05 19:12 ` Tim Schumacher
2018-09-05 17:34 ` Jeff King
2018-09-05 20:02 ` Tim Schumacher
2018-09-06 13:38 ` Ævar Arnfjörð Bjarmason
2018-09-06 14:17 ` Ævar Arnfjörð Bjarmason
2018-10-18 22:57 ` [PATCH] alias: detect loops in mixed execution mode Ævar Arnfjörð Bjarmason
2018-10-19 8:28 ` Ævar Arnfjörð Bjarmason
2018-10-19 22:09 ` Jeff King
2018-10-20 10:52 ` Ævar Arnfjörð Bjarmason
2018-10-19 22:07 ` Jeff King
2018-10-20 11:14 ` Ævar Arnfjörð Bjarmason
2018-10-20 18:58 ` Jeff King
2018-10-20 19:18 ` Ævar Arnfjörð Bjarmason
2018-10-22 21:15 ` Jeff King
2018-10-22 21:28 ` Ævar Arnfjörð Bjarmason
2018-10-22 1:23 ` Junio C Hamano
2018-10-26 8:39 ` Jeff King
2018-10-26 12:44 ` Ævar Arnfjörð Bjarmason
2018-10-29 3:44 ` Junio C Hamano
2018-10-29 14:17 ` Jeff King
2018-09-05 21:51 ` [RFC PATCH v2] Allow aliases that include other aliases Junio C Hamano
2018-09-06 10:16 ` [PATCH v3] " Tim Schumacher
2018-09-06 14:01 ` Ævar Arnfjörð Bjarmason
2018-09-06 14:57 ` Jeff King
2018-09-06 15:10 ` Ævar Arnfjörð Bjarmason
2018-09-06 16:18 ` Jeff King
2018-09-06 19:05 ` Tim Schumacher
2018-09-06 19:17 ` Jeff King
2018-09-06 14:59 ` Jeff King
2018-09-06 18:40 ` Junio C Hamano
2018-09-06 19:05 ` Jeff King
2018-09-06 19:31 ` Tim Schumacher
2018-09-07 22:44 ` [RFC PATCH v4 1/3] Add support for nested aliases Tim Schumacher
2018-09-07 22:44 ` [RFC PATCH v4 2/3] Show the call history when an alias is looping Tim Schumacher
2018-09-08 13:34 ` Duy Nguyen
2018-09-08 16:29 ` Jeff King [this message]
2018-09-07 22:44 ` [RFC PATCH v4 3/3] t0014: Introduce alias testing suite Tim Schumacher
2018-09-07 23:38 ` Eric Sunshine
2018-09-14 23:12 ` Tim Schumacher
2018-09-16 7:21 ` Eric Sunshine
2018-09-08 13:28 ` [RFC PATCH v4 1/3] Add support for nested aliases Duy Nguyen
2018-09-16 7:46 ` Tim Schumacher
2018-09-17 15:37 ` Junio C Hamano
2018-09-21 12:45 ` Tim Schumacher
2018-09-21 15:59 ` Junio C Hamano
2018-09-16 7:50 ` [PATCH v5 " Tim Schumacher
2018-09-16 7:50 ` [PATCH v5 2/3] Show the call history when an alias is looping Tim Schumacher
2018-09-16 7:50 ` [PATCH v5 3/3] t0014: Introduce an alias testing suite Tim Schumacher
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