From: Junio C Hamano <gitster@pobox.com>
To: Brandon Williams <bmwill@google.com>
Cc: Stefan Beller <sbeller@google.com>,
Derrick Stolee <stolee@gmail.com>,
"brian m. carlson" <sandals@crustytoothpaste.net>,
git <git@vger.kernel.org>, Jeff King <peff@peff.net>,
Eric Sunshine <sunshine@sunshineco.com>
Subject: Re: [PATCH 07/17] commit: increase commit message buffer size
Date: Mon, 09 Jul 2018 10:34:06 -0700 [thread overview]
Message-ID: <xmqqzhz0e2k1.fsf@gitster-ct.c.googlers.com> (raw)
In-Reply-To: <20180709172716.GA81741@google.com> (Brandon Williams's message of "Mon, 9 Jul 2018 10:27:16 -0700")
Brandon Williams <bmwill@google.com> writes:
>> > > diff --git a/refs/files-backend.c b/refs/files-backend.c
>> > > index a9a066dcfb..252f835bae 100644
>> > > --- a/refs/files-backend.c
>> > > +++ b/refs/files-backend.c
>> > > @@ -1587,7 +1587,7 @@ static int log_ref_write_fd(int fd, const struct object_id *old_oid,
>> > > char *logrec;
>> > >
>> > > msglen = msg ? strlen(msg) : 0;
>> > > - maxlen = strlen(committer) + msglen + 100;
>> > > + maxlen = strlen(committer) + msglen + 200;
>> > > logrec = xmalloc(maxlen);
>> > > len = xsnprintf(logrec, maxlen, "%s %s %s\n",
>> > > oid_to_hex(old_oid),
>> >
>> > nit: 100 is not enough anymore, but wasn't a very descriptive value. 200
>> > may be enough now, but I'm not sure why.
>>
>> That line was touched in by Michael in 7bd9bcf372d (refs: split filesystem-based
>> refs code into a new file, 2015-11-09) and before that by Ronnie in 2c6207abbd6
>> (refs.c: add a function to append a reflog entry to a fd, 2014-12-12)
>> and introduced
>> by Junio in 8ac65937d03 (Make sure we do not write bogus reflog
>> entries., 2007-01-26)
>> and it appears to me that 2*40 + 5 ought to be sufficient, but no
>> comments or commit
>> messages are found as to why we rather choose 100.
>
> Whats the reason for not using a strbuf here so that we don't have to
> play with magic numbers?
Quite a legitimate question.
I suspect that the reason is because the code (even though it now
sits in a file that was relatively recently creted) predates either
the introduction or wide adoption of strbuf.
Back when 6de08ae6 ("Log ref updates to logs/refs/<ref>",
2006-05-17) was done, we already had strbuf.c, but it only had
read_line() and nothing else back then, so it wouldn't have been
possible to use a strbuf there.
next prev parent reply other threads:[~2018-07-09 17:34 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-07-08 23:36 [PATCH 00/17] object_id part 14 brian m. carlson
2018-07-08 23:36 ` [PATCH 01/17] cache: update object ID functions for the_hash_algo brian m. carlson
2018-07-09 2:38 ` Jacob Keller
2018-07-09 4:05 ` Eric Sunshine
2018-07-09 4:31 ` Jacob Keller
2018-07-09 23:26 ` brian m. carlson
2018-07-08 23:36 ` [PATCH 02/17] tree-walk: replace hard-coded constants with the_hash_algo brian m. carlson
2018-07-08 23:36 ` [PATCH 03/17] hex: switch to using the_hash_algo brian m. carlson
2018-07-08 23:36 ` [PATCH 04/17] commit: express tree entry constants in terms of the_hash_algo brian m. carlson
2018-07-08 23:36 ` [PATCH 05/17] strbuf: allocate space with GIT_MAX_HEXSZ brian m. carlson
2018-07-08 23:36 ` [PATCH 06/17] sha1-name: use the_hash_algo when parsing object names brian m. carlson
2018-07-08 23:36 ` [PATCH 07/17] commit: increase commit message buffer size brian m. carlson
2018-07-09 13:09 ` Derrick Stolee
2018-07-09 17:24 ` Stefan Beller
2018-07-09 17:27 ` Brandon Williams
2018-07-09 17:34 ` Junio C Hamano [this message]
2018-07-09 17:36 ` Brandon Williams
2018-07-09 17:45 ` Junio C Hamano
2018-07-09 23:39 ` brian m. carlson
2018-07-10 16:35 ` Junio C Hamano
2018-07-10 18:08 ` Ben Peart
2018-07-11 1:43 ` brian m. carlson
2018-07-11 15:36 ` Junio C Hamano
2018-07-08 23:36 ` [PATCH 08/17] refs/files-backend: use the_hash_algo for writing refs brian m. carlson
2018-07-08 23:36 ` [PATCH 09/17] builtin/update-index: convert to using the_hash_algo brian m. carlson
2018-07-08 23:36 ` [PATCH 10/17] builtin/update-index: simplify parsing of cacheinfo brian m. carlson
2018-07-08 23:36 ` [PATCH 11/17] builtin/fmt-merge-msg: make hash independent brian m. carlson
2018-07-08 23:36 ` [PATCH 12/17] builtin/merge: switch to use the_hash_algo brian m. carlson
2018-07-08 23:36 ` [PATCH 13/17] builtin/merge-recursive: make hash independent brian m. carlson
2018-07-08 23:36 ` [PATCH 14/17] diff: switch GIT_SHA1_HEXSZ to use the_hash_algo brian m. carlson
2018-07-08 23:36 ` [PATCH 15/17] log-tree: switch GIT_SHA1_HEXSZ to the_hash_algo->hexsz brian m. carlson
2018-07-08 23:36 ` [PATCH 16/17] sha1-file: convert constants to uses of the_hash_algo brian m. carlson
2018-07-08 23:36 ` [PATCH 17/17] pretty: switch hard-coded constants to the_hash_algo brian m. carlson
2018-07-09 3:12 ` [PATCH 00/17] object_id part 14 Jacob Keller
2018-07-09 13:12 ` Derrick Stolee
2018-07-14 23:38 ` Michael Haggerty
2018-07-16 21:06 ` Junio C Hamano
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