From: Jeff King <peff@peff.net>
To: "Ævar Arnfjörð Bjarmason" <avarab@gmail.com>
Cc: git@vger.kernel.org, Junio C Hamano <gitster@pobox.com>,
"brian m . carlson" <sandals@crustytoothpaste.net>,
Bagas Sanjaya <bagasdotme@gmail.com>
Subject: Re: [PATCH v2 0/8] post-v2.33 "drop support for ancient curl" follow-up
Date: Fri, 10 Sep 2021 10:37:40 -0400 [thread overview]
Message-ID: <YTtttIuur0JvcPub@coredump.intra.peff.net> (raw)
In-Reply-To: <cover-v2-0.8-00000000000-20210910T105523Z-avarab@gmail.com>
On Fri, Sep 10, 2021 at 01:04:25PM +0200, Ævar Arnfjörð Bjarmason wrote:
> Version 1 of this had a really bad bug where we'd effectively make all
> supported curl versions act like 7.19.4, i.e. the oldest supported
> version except for a couple of our supported features. This is because
> most of the things checked with the "ifdef" checks are enum fields,
> not macros. So basically the "devil's advocate" Jeff King pointed out
> in [2] was already the case. Oops!
Oops. :)
Well, I'm glad I mentioned it, then (I really was just playing devil's
advocate). It does seem a little scary that we'd compile without all of
these features and not even notice it.
I guess it's hard to test for those features when we don't know for sure
that our libcurl supports them. We could perhaps make the tests
optional, but how do we set up the prereqs?
Version checks based on "curl --version" or even "pkg-config
--modversion libcurl" seems error-prone. The curl binary might not match
the library we used, or the user might have given us a specific libcurl
to use rather than the pkg-config version. We could teach Git to tell us
which features it thinks curl supports, but that's depending on the very
thing we're trying to test. We could have Git output the
LIBCURL_VERSION_NUM it saw at build time, but then we're just
implementing the same "if version > X, we have this feature" logic now
in the test suite.
So I dunno. I do not have any clever solution that would have caught
this automatically without creating an even bigger maintenance headache.
(Though for other reasons, it might be nice to report the curl version
from "git version --build-options". This is a bit tricky because we
avoid linking at libcurl at all in the main binary. Definitely
orthogonal to your series, anyway).
> This means that anyone on an older distro with backported features
> will need to -DGIT_CURL_HAVE_* if their version of curl supports some
> of these via a backport, not ideal, but an acceptable trade-off. If we
> cared about this we could have some "detect-curl" script similar to my
> proposed "detect-compiler"[3] (or another homegrown autoconf
> replacement).
I think that's acceptable. This should be rare, and they can always set
CFLAGS appropriately.
-Peff
next prev parent reply other threads:[~2021-09-10 14:37 UTC|newest]
Thread overview: 173+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-08-09 12:00 [PATCH 0/4] dropping support for older curl Jeff King
2017-08-09 12:01 ` [PATCH 1/4] http: drop support for curl < 7.11.1 Jeff King
2017-08-09 12:01 ` [PATCH 2/4] http: drop support for curl < 7.16.0 Jeff King
2017-08-09 17:29 ` Stefan Beller
2017-08-09 21:13 ` Jeff King
2017-08-09 17:40 ` Junio C Hamano
2017-08-09 18:03 ` Nicolas Morey-Chaisemartin
2017-08-09 21:17 ` Jeff King
2017-08-09 21:29 ` Nicolas Morey-Chaisemartin
2017-08-09 21:49 ` Jeff King
2017-08-09 21:15 ` Jeff King
2017-08-09 12:02 ` [PATCH 3/4] http: drop support for curl < 7.19.4 Jeff King
2017-08-09 13:14 ` Ævar Arnfjörð Bjarmason
2017-08-09 13:38 ` Jeff King
2017-08-09 13:49 ` [PATCH 5/4] curl: remove ifdef'd code never used with curl >=7.19.4 Ævar Arnfjörð Bjarmason
2017-08-09 17:34 ` [PATCH 3/4] http: drop support for curl < 7.19.4 Stefan Beller
2017-08-09 21:19 ` Jeff King
2017-08-10 12:36 ` Mischa POSLAWSKY
2017-08-10 17:34 ` Jeff King
2017-08-09 12:02 ` [PATCH 4/4] http: #error on too-old curl Jeff King
2017-08-09 17:37 ` Stefan Beller
2017-08-09 21:42 ` [PATCH 0/4] dropping support for older curl Johannes Schindelin
2017-08-09 21:47 ` Jeff King
2017-08-10 9:01 ` Tom G. Christensen
2017-08-10 9:36 ` Johannes Schindelin
2017-08-10 21:33 ` Jeff King
2017-08-10 22:17 ` Junio C Hamano
2017-08-10 23:09 ` Jeff King
2017-08-11 0:17 ` Jeff King
[not found] ` <CAHVLzcnnrABmkYNg31Aq99NgBbyuCKEM60pHGygyjXbjmaUEYQ@mail.gmail.com>
2017-08-14 21:50 ` Johannes Schindelin
2017-08-10 20:33 ` Tom G. Christensen
2017-08-10 21:32 ` Jeff King
2017-08-10 22:23 ` Tom G. Christensen
2017-08-10 22:54 ` Jeff King
2017-08-10 23:17 ` Tom G. Christensen
2017-08-10 23:23 ` Jeff King
2017-08-10 23:36 ` Tom G. Christensen
2017-08-11 16:37 ` [PATCH 0/2] http: handle curl with vendor backports Tom G. Christensen
2017-08-11 22:15 ` Junio C Hamano
2017-08-12 6:20 ` Tom G. Christensen
2017-08-20 8:47 ` Jeff King
2017-08-20 16:28 ` Junio C Hamano
2017-08-23 15:41 ` Jeff King
2017-08-11 16:37 ` [PATCH 1/2] http: Fix handling of missing CURLPROTO_* Tom G. Christensen
2017-08-12 0:30 ` Junio C Hamano
2017-08-12 9:04 ` Tom G. Christensen
2017-08-20 8:59 ` Jeff King
2017-08-11 16:37 ` [PATCH 2/2] http: use a feature check to enable GSSAPI delegation control Tom G. Christensen
2017-08-09 23:39 ` [PATCH 0/4] dropping support for older curl Ævar Arnfjörð Bjarmason
[not found] ` <87zib8g8ub.fsf@gmail.com>
2017-08-10 10:04 ` Dropping support for older perl Tom G. Christensen
2021-07-21 22:22 ` [PATCH v2 0/5] drop support for ancient curl Ævar Arnfjörð Bjarmason
2021-07-21 22:22 ` [PATCH v2 1/5] http: drop support for curl < 7.11.1 Ævar Arnfjörð Bjarmason
2021-07-21 22:56 ` Junio C Hamano
2021-07-21 22:22 ` [PATCH v2 2/5] http: drop support for curl < 7.16.0 Ævar Arnfjörð Bjarmason
2021-07-21 22:22 ` [PATCH v2 3/5] http: drop support for curl < 7.19.4 Ævar Arnfjörð Bjarmason
2021-07-21 23:05 ` Junio C Hamano
2021-07-21 22:22 ` [PATCH v2 4/5] http: drop support for curl < 7.19.3 and < 7.16.4 (again) Ævar Arnfjörð Bjarmason
2021-07-21 23:17 ` Junio C Hamano
2021-07-21 22:22 ` [PATCH v2 5/5] http: rename CURLOPT_FILE to CURLOPT_WRITEDATA Ævar Arnfjörð Bjarmason
2021-07-21 23:19 ` Junio C Hamano
2021-07-21 22:39 ` [PATCH v2 0/5] drop support for ancient curl Junio C Hamano
2021-07-21 22:56 ` brian m. carlson
2021-07-22 7:09 ` Ævar Arnfjörð Bjarmason
2021-07-22 22:56 ` brian m. carlson
2021-07-23 7:17 ` Ævar Arnfjörð Bjarmason
2021-07-22 6:27 ` Bagas Sanjaya
2021-07-23 10:16 ` Jeff King
2021-07-23 16:21 ` Junio C Hamano
2021-07-23 16:49 ` Randall S. Becker
2021-07-24 1:19 ` Jeff King
2021-07-30 9:31 ` [PATCH v3 0/7] drop support for ancient curl, improve version checks Ævar Arnfjörð Bjarmason
2021-07-30 9:31 ` [PATCH v3 1/7] http: drop support for curl < 7.11.1 Ævar Arnfjörð Bjarmason
2021-07-30 9:31 ` [PATCH v3 2/7] http: drop support for curl < 7.16.0 Ævar Arnfjörð Bjarmason
2021-07-30 9:31 ` [PATCH v3 3/7] http: drop support for curl < 7.19.4 Ævar Arnfjörð Bjarmason
2021-07-30 9:31 ` [PATCH v3 4/7] http: drop support for curl < 7.19.3 and <= 7.16.4 (or <7.17.0) (again) Ævar Arnfjörð Bjarmason
2021-07-30 16:18 ` Junio C Hamano
2021-07-30 9:31 ` [PATCH v3 5/7] http: drop support for curl < 7.18.0 (again) Ævar Arnfjörð Bjarmason
2021-07-30 16:22 ` Junio C Hamano
2021-07-30 9:31 ` [PATCH v3 6/7] http: rename CURLOPT_FILE to CURLOPT_WRITEDATA Ævar Arnfjörð Bjarmason
2021-07-30 9:31 ` [PATCH v3 7/7] http: centralize the accounting of libcurl dependencies Ævar Arnfjörð Bjarmason
2021-07-30 16:47 ` Junio C Hamano
2021-07-30 17:59 ` [PATCH v4 0/5] drop support for ancient curl Ævar Arnfjörð Bjarmason
2021-07-30 17:59 ` [PATCH v4 1/5] http: drop support for curl < 7.11.1 Ævar Arnfjörð Bjarmason
2021-07-30 17:59 ` [PATCH v4 2/5] http: drop support for curl < 7.16.0 Ævar Arnfjörð Bjarmason
2021-09-10 22:28 ` Andrei Rybak
2021-09-11 14:32 ` Jeff King
2021-09-11 21:39 ` Junio C Hamano
2021-09-11 21:58 ` Jeff King
2021-07-30 17:59 ` [PATCH v4 3/5] http: drop support for curl < 7.19.4 Ævar Arnfjörð Bjarmason
2021-07-30 17:59 ` [PATCH v4 4/5] http: drop support for curl < 7.19.3 and < 7.17.0 (again) Ævar Arnfjörð Bjarmason
2021-07-30 17:59 ` [PATCH v4 5/5] http: rename CURLOPT_FILE to CURLOPT_WRITEDATA Ævar Arnfjörð Bjarmason
2021-07-30 19:03 ` [PATCH v4 0/5] drop support for ancient curl Junio C Hamano
2021-07-30 19:50 ` Junio C Hamano
2021-07-30 22:49 ` Junio C Hamano
2021-09-08 15:31 ` [PATCH 0/5] post-v2.33 "drop support for ancient curl" follow-up Ævar Arnfjörð Bjarmason
2021-09-08 15:31 ` [PATCH 1/5] http: drop support for curl < 7.18.0 (again) Ævar Arnfjörð Bjarmason
2021-09-09 22:58 ` Junio C Hamano
2021-09-08 15:31 ` [PATCH 2/5] http: correct curl version check for CURLOPT_PINNEDPUBLICKEY Ævar Arnfjörð Bjarmason
2021-09-08 19:22 ` Jeff King
2021-09-09 23:12 ` Junio C Hamano
2021-09-10 14:19 ` Jeff King
2021-09-10 14:30 ` Jeff King
2021-09-10 14:37 ` Ævar Arnfjörð Bjarmason
2021-09-10 15:28 ` Jeff King
2021-09-10 15:45 ` Daniel Stenberg
2021-09-10 19:41 ` Ævar Arnfjörð Bjarmason
2021-09-10 21:57 ` Daniel Stenberg
2021-09-08 15:31 ` [PATCH 3/5] http: correct version check for CURL_HTTP_VERSION_2_0 Ævar Arnfjörð Bjarmason
2021-09-08 19:27 ` Jeff King
2021-09-08 15:31 ` [PATCH 4/5] http: centralize the accounting of libcurl dependencies Ævar Arnfjörð Bjarmason
2021-09-08 19:31 ` Jeff King
2021-09-09 17:40 ` Junio C Hamano
2021-09-09 19:26 ` Jeff King
2021-09-08 15:31 ` [PATCH 5/5] http: don't hardcode the value of CURL_SOCKOPT_OK Ævar Arnfjörð Bjarmason
2021-09-09 23:15 ` Junio C Hamano
2021-09-09 23:22 ` Junio C Hamano
2021-09-08 19:32 ` [PATCH 0/5] post-v2.33 "drop support for ancient curl" follow-up Jeff King
2021-09-10 11:04 ` [PATCH v2 0/8] " Ævar Arnfjörð Bjarmason
2021-09-10 11:04 ` [PATCH v2 1/8] INSTALL: don't mention the "curl" executable at all Ævar Arnfjörð Bjarmason
2021-09-10 14:53 ` Jeff King
2021-09-10 11:04 ` [PATCH v2 2/8] INSTALL: mention that we need libcurl 7.19.4 or newer to build Ævar Arnfjörð Bjarmason
2021-09-10 14:54 ` Jeff King
2021-09-10 16:56 ` Junio C Hamano
2021-09-10 17:46 ` Jeff King
2021-09-10 11:04 ` [PATCH v2 3/8] Makefile: drop support for curl < 7.9.8 (again) Ævar Arnfjörð Bjarmason
2021-09-10 15:04 ` Jeff King
2021-09-10 11:04 ` [PATCH v2 4/8] http: drop support for curl < 7.18.0 (again) Ævar Arnfjörð Bjarmason
2021-09-10 11:04 ` [PATCH v2 5/8] http: correct version check for CURL_HTTP_VERSION_2 Ævar Arnfjörð Bjarmason
2021-09-10 15:09 ` Jeff King
2021-09-10 15:20 ` Daniel Stenberg
2021-09-10 15:41 ` Jeff King
2021-09-10 17:19 ` Ævar Arnfjörð Bjarmason
2021-09-10 11:04 ` [PATCH v2 6/8] http: correct curl version check for CURLOPT_PINNEDPUBLICKEY Ævar Arnfjörð Bjarmason
2021-09-10 17:00 ` Junio C Hamano
2021-09-10 11:04 ` [PATCH v2 7/8] http: centralize the accounting of libcurl dependencies Ævar Arnfjörð Bjarmason
2021-09-10 15:15 ` Jeff King
2021-09-10 11:04 ` [PATCH v2 8/8] http: don't hardcode the value of CURL_SOCKOPT_OK Ævar Arnfjörð Bjarmason
2021-09-10 15:17 ` Jeff King
2021-09-10 14:37 ` Jeff King [this message]
2021-09-10 15:08 ` [PATCH v2 0/8] post-v2.33 "drop support for ancient curl" follow-up Ævar Arnfjörð Bjarmason
2021-09-10 15:20 ` Jeff King
2021-09-10 16:52 ` Junio C Hamano
2021-09-10 17:06 ` Randall S. Becker
2021-09-10 17:42 ` Ævar Arnfjörð Bjarmason
2021-09-10 17:14 ` Junio C Hamano
2021-09-10 17:32 ` Junio C Hamano
2021-09-10 19:05 ` Konstantin Ryabitsev
2021-09-10 19:49 ` Junio C Hamano
2021-09-10 17:47 ` Ævar Arnfjörð Bjarmason
2021-09-11 9:34 ` [PATCH v3 0/9] " Ævar Arnfjörð Bjarmason
2021-09-11 9:34 ` [PATCH v3 1/9] INSTALL: don't mention the "curl" executable at all Ævar Arnfjörð Bjarmason
2021-09-11 9:34 ` [PATCH v3 2/9] INSTALL: reword and copy-edit the "libcurl" section Ævar Arnfjörð Bjarmason
2021-09-11 9:34 ` [PATCH v3 3/9] INSTALL: mention that we need libcurl 7.19.4 or newer to build Ævar Arnfjörð Bjarmason
2021-09-11 9:34 ` [PATCH v3 4/9] Makefile: drop support for curl < 7.9.8 (again) Ævar Arnfjörð Bjarmason
2021-09-11 9:34 ` [PATCH v3 5/9] http: drop support for curl < 7.18.0 (again) Ævar Arnfjörð Bjarmason
2021-09-11 9:34 ` [PATCH v3 6/9] http: correct version check for CURL_HTTP_VERSION_2 Ævar Arnfjörð Bjarmason
2021-09-11 9:34 ` [PATCH v3 7/9] http: correct curl version check for CURLOPT_PINNEDPUBLICKEY Ævar Arnfjörð Bjarmason
2021-09-11 9:34 ` [PATCH v3 8/9] http: centralize the accounting of libcurl dependencies Ævar Arnfjörð Bjarmason
2021-09-11 9:34 ` [PATCH v3 9/9] http: don't hardcode the value of CURL_SOCKOPT_OK Ævar Arnfjörð Bjarmason
2021-09-11 14:46 ` [PATCH v3 0/9] post-v2.33 "drop support for ancient curl" follow-up Jeff King
2021-09-12 19:01 ` Junio C Hamano
2021-09-13 14:51 ` [PATCH v4 " Ævar Arnfjörð Bjarmason
2021-09-13 14:51 ` [PATCH v4 1/9] INSTALL: don't mention the "curl" executable at all Ævar Arnfjörð Bjarmason
2021-09-13 14:51 ` [PATCH v4 2/9] INSTALL: reword and copy-edit the "libcurl" section Ævar Arnfjörð Bjarmason
2021-09-13 14:51 ` [PATCH v4 3/9] INSTALL: mention that we need libcurl 7.19.4 or newer to build Ævar Arnfjörð Bjarmason
2021-09-13 14:51 ` [PATCH v4 4/9] Makefile: drop support for curl < 7.9.8 (again) Ævar Arnfjörð Bjarmason
2021-09-13 14:51 ` [PATCH v4 5/9] http: drop support for curl < 7.18.0 (again) Ævar Arnfjörð Bjarmason
2021-09-13 14:51 ` [PATCH v4 6/9] http: correct version check for CURL_HTTP_VERSION_2 Ævar Arnfjörð Bjarmason
2021-09-13 14:51 ` [PATCH v4 7/9] http: correct curl version check for CURLOPT_PINNEDPUBLICKEY Ævar Arnfjörð Bjarmason
2021-09-13 14:51 ` [PATCH v4 8/9] http: centralize the accounting of libcurl dependencies Ævar Arnfjörð Bjarmason
2021-09-13 14:51 ` [PATCH v4 9/9] http: don't hardcode the value of CURL_SOCKOPT_OK Ævar Arnfjörð Bjarmason
2021-09-13 17:02 ` [PATCH v4 0/9] post-v2.33 "drop support for ancient curl" follow-up Jeff King
2021-09-13 17:41 ` Junio C Hamano
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