From: Jeff King <peff@peff.net>
To: "SZEDER Gábor" <szeder.dev@gmail.com>
Cc: Junio C Hamano <gitster@pobox.com>, git@vger.kernel.org
Subject: Re: [PATCHv3 1/4] clone: respect additional configured fetch refspecs during initial fetch
Date: Fri, 26 May 2017 09:30:24 -0400 [thread overview]
Message-ID: <20170526133024.g5rztiv3lea37n72@sigill.intra.peff.net> (raw)
In-Reply-To: <20170526100403.19270-1-szeder.dev@gmail.com>
On Fri, May 26, 2017 at 12:04:03PM +0200, SZEDER Gábor wrote:
> > but given that it lazy-parses in
> > some cases, it feels a little dangerous.
>
> I'm not sure about lazy parsing.
> remote_get() returns a fully-parsed, cached struct remote instance
> without re-reading the configuration, so all fields directly
> corresponding to configuration variables stay the same. However, it
> does parse fetch and push refspecs on every invocation. So if it were
> to be called to return the origin remote more than once during
> cloning, then the default refspec would get lost on subsequent
> invocations. Is this what you meant with dangerous?
More or less. I actually didn't look far enough to see under what
circumstances we might re-parse (or might not have parsed when we add
our extra refspec), but that's definitely the sort of thing I was
worried about.
> (Sidenote: and it would leak some memory, too, because it re-parses
> the refspecs without free()ing the results of the previous
> invocation.)
Yes, I'd argue that the current code is buggy, since:
x = remote_get("foo");
y = remote_get("foo");
is a guaranteed leak. It seems like remote_get_1() should protect the
call to parse_fetch_refspec() by checking whether ret->fetch is NULL
(and ditto for ret->push).
> Your proposed function to add a refspec as a string would eliminate
> this danger.
Yeah, I think it's not that hard to support. I'd just rather have the
logic inside remote.c, rather than infecting the caller with the
complexity.
> It certainly looks better, see the patch below the scissors for
> reference, and I thought it works because until last night I only run
> the corresponding test script (t5611-clone-config), though I know very
> well that "Thou shalt always run the full test suite!" :)
>
> Unfortunately, putting the default refspec into this temporary
> configuration environment breaks a few submodule tests
> (t5614-clone-submodules or t5614-clone-submodules-shallow (it's got
> renamed between this topic and master), t7407-submodule-foreach,
> t7410-submodule-checkout-to), because it "leaks" to the submodule
> environment.
Doh, of course. I didn't think of that. That's probably a bad direction,
then, as there's no "just for this process" global config.
-Peff
next prev parent reply other threads:[~2017-05-26 13:30 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-05-15 11:05 [PATCHv3 0/4] clone: respect configured fetch respecs during initial fetch SZEDER Gábor
2017-05-15 11:05 ` [PATCHv3 1/4] clone: respect additional configured fetch refspecs " SZEDER Gábor
2017-05-15 23:07 ` Jeff King
2017-05-26 10:04 ` SZEDER Gábor
2017-05-26 13:30 ` Jeff King [this message]
2017-05-30 3:53 ` Junio C Hamano
2017-05-30 3:55 ` Jeff King
2017-05-30 7:11 ` SZEDER Gábor
2017-05-30 7:12 ` [PATCHv4 1/2] " SZEDER Gábor
2017-05-30 7:12 ` [PATCHv4 2/2] Documentation/clone: document ignored configuration variables SZEDER Gábor
2017-05-30 9:01 ` Ævar Arnfjörð Bjarmason
2017-05-31 8:50 ` SZEDER Gábor
2017-05-31 14:17 ` Ævar Arnfjörð Bjarmason
2017-06-13 23:24 ` Jonathan Nieder
2017-05-31 4:23 ` [PATCHv4 1/2] clone: respect additional configured fetch refspecs during initial fetch Jeff King
2017-05-31 9:34 ` SZEDER Gábor
2017-06-05 8:18 ` Jeff King
2017-06-06 18:19 ` SZEDER Gábor
2017-06-06 18:37 ` Jeff King
2017-06-07 11:17 ` SZEDER Gábor
2017-06-14 0:48 ` Jonathan Nieder
2017-06-14 9:50 ` Jeff King
2017-06-16 17:36 ` SZEDER Gábor
2017-06-16 17:38 ` [PATCHv5 0/2] " SZEDER Gábor
2017-06-16 17:38 ` [PATCHv5 1/2] " SZEDER Gábor
2017-06-16 20:37 ` Jonathan Nieder
2017-06-17 11:22 ` Jeff King
2017-06-22 22:23 ` Junio C Hamano
2017-08-12 0:48 ` Junio C Hamano
2017-06-16 17:38 ` [PATCHv5 2/2] Documentation/clone: document ignored configuration variables SZEDER Gábor
2017-06-16 18:23 ` Ævar Arnfjörð Bjarmason
2017-06-16 20:41 ` Jonathan Nieder
2017-06-16 21:10 ` Ævar Arnfjörð Bjarmason
2017-06-16 22:15 ` SZEDER Gábor
2017-06-16 20:38 ` Jonathan Nieder
2017-06-16 22:09 ` Junio C Hamano
2017-05-31 4:27 ` [PATCH] remote: drop free_refspecs() function Jeff King
2017-06-14 0:49 ` Jonathan Nieder
2017-05-15 11:05 ` [PATCHv3 2/4] Documentation/clone: document ignored configuration variables SZEDER Gábor
2017-05-26 14:01 ` SZEDER Gábor
2017-05-15 11:05 ` [PATCHv3 3/4] remote: drop free_refspecs() function SZEDER Gábor
2017-05-15 11:05 ` [PATCHv3 4/4] clone: use free_refspec() to free refspec list SZEDER Gábor
2017-05-15 11:29 ` SZEDER Gábor
2017-05-15 23:10 ` Jeff King
2017-05-23 7:38 ` Junio C Hamano
2017-05-23 11:27 ` Jeff King
2017-05-23 12:06 ` SZEDER Gábor
2017-05-15 22:46 ` [PATCHv3 0/4] clone: respect configured fetch respecs during initial fetch Jeff King
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