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From: "Martin Ågren" <martin.agren@gmail.com>
To: Jeff King <peff@peff.net>
Cc: Git Mailing List <git@vger.kernel.org>,
	"brian m . carlson" <sandals@crustytoothpaste.net>
Subject: Re: [PATCH v2 2/3] setup: do not use invalid `repository_format`
Date: Tue, 22 Jan 2019 14:34:12 +0100	[thread overview]
Message-ID: <CAN0heSq0Nb-WdhDFpdwgjUMrkJNbviAtietn=B5nJg-rDgcR_g@mail.gmail.com> (raw)
In-Reply-To: <20190122070725.GA28555@sigill.intra.peff.net>

On Tue, 22 Jan 2019 at 08:07, Jeff King <peff@peff.net> wrote:
>
> On Thu, Jan 17, 2019 at 07:31:14AM +0100, Martin Ågren wrote:
>
> > Something like the below on top of this series (then rebased). (The last
> > hunk below is a revert of this patch.)
>
> Yes, that's exactly what I had in mind. Usually our clear() functions
> put the struct back into some default state from which it can be used
> gain. But the state after clear() here (without the patch below) is
> something that nobody is ever expected to look at.

> > So in particular, why doesn't `clear...()` and the error path in
> > `read_...()` impose sane, usable defaults? My first concern is that it
> > means we need to make a stronger promise, which might then be hard to
> > back away from, if we want to. Maybe we'll never want to...
>
> I'm not too worried about that personally. I think the more likely
> problem is that the API is misunderstood and misused. ;)

Heh. Agreed. :-)

> Now if your next question is: "does any caller misuse this as more than
> looking at the repo format", I don't know the answer for sure. That
> would be worth poking at (or perhaps having just poked yourself, you
> might have an idea already).

Not really. I've stumbled around a little, but I'll need to do that some
more.

> For the record, I can live with it either way. There are so many funky
> little setup corner cases in the code already, and we don't even really
> have a real-world case to dissect at this point. So the right thing may
> also just be to finish this patch series as quickly as possible and move
> on to something more useful. :)

I rebased the "something like this?" into this series yesterday and I
think the end result is better, but also that the way there is clearer,
mostly because this patch is then gone. I wanted to double-check it
tonight and submit it. I'll do that tonight.

Thank you for your comments. They're really helpful.


Martin

  reply	other threads:[~2019-01-22 13:34 UTC|newest]

Thread overview: 40+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-12-18  7:25 [PATCH 0/3] setup: add `clear_repository_format()` Martin Ågren
2018-12-18  7:25 ` [PATCH 1/3] setup: drop return value from `read_repository_format()` Martin Ågren
2018-12-19 15:27   ` Jeff King
2018-12-19 21:42     ` Martin Ågren
2018-12-20  0:17     ` brian m. carlson
2018-12-20  2:52       ` Jeff King
2018-12-20  3:45         ` brian m. carlson
2018-12-20 14:53           ` Jeff King
2018-12-18  7:25 ` [PATCH 2/3] setup: do not use invalid `repository_format` Martin Ågren
2018-12-19  0:18   ` brian m. carlson
2018-12-19 21:43     ` Martin Ågren
2018-12-19 15:38   ` Jeff King
2018-12-19 21:46     ` Martin Ågren
2018-12-19 23:17       ` Jeff King
2018-12-20  0:21     ` brian m. carlson
2018-12-18  7:25 ` [PATCH 3/3] setup: add `clear_repository_format()` Martin Ågren
2018-12-19 15:48   ` Jeff King
2018-12-19 21:49     ` Martin Ågren
2019-01-14 18:34 ` [PATCH v2 0/3] " Martin Ågren
2019-01-14 18:34   ` [PATCH v2 1/3] setup: free old value before setting `work_tree` Martin Ågren
2019-01-14 18:34   ` [PATCH v2 2/3] setup: do not use invalid `repository_format` Martin Ågren
2019-01-15 19:31     ` Jeff King
2019-01-17  6:31       ` Martin Ågren
2019-01-22  7:07         ` Jeff King
2019-01-22 13:34           ` Martin Ågren [this message]
2019-01-22 21:45             ` [PATCH v3 0/2] setup: fix memory leaks with `struct repository_format` Martin Ågren
2019-01-22 21:45               ` [PATCH v3 1/2] setup: free old value before setting `work_tree` Martin Ågren
2019-01-22 21:45               ` [PATCH v3 2/2] setup: fix memory leaks with `struct repository_format` Martin Ågren
2019-01-23  5:57                 ` Jeff King
2019-01-24  0:14                   ` brian m. carlson
2019-01-25 19:25                     ` Martin Ågren
2019-01-25 19:24                   ` Martin Ågren
2019-01-25 19:51                     ` Jeff King
2019-02-25 19:21                       ` Martin Ågren
2019-02-26 17:46                         ` Jeff King
2019-02-28 20:36                           ` [PATCH v4 0/2] " Martin Ågren
2019-02-28 20:36                             ` [PATCH v4 1/2] setup: free old value before setting `work_tree` Martin Ågren
2019-02-28 20:36                             ` [PATCH v4 2/2] setup: fix memory leaks with `struct repository_format` Martin Ågren
2019-03-06  4:56                             ` [PATCH v4 0/2] " Jeff King
2019-01-14 18:34   ` [PATCH v2 3/3] setup: add `clear_repository_format()` Martin Ågren

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