From: Junio C Hamano <gitster@pobox.com>
To: Johannes Schindelin <Johannes.Schindelin@gmx.de>
Cc: "Ævar Arnfjörð Bjarmason" <avarab@gmail.com>,
git@vger.kernel.org, "Anthony Sottile" <asottile@umich.edu>,
"Emily Shaffer" <emilyshaffer@google.com>,
"Phillip Wood" <phillip.wood123@gmail.com>
Subject: Re: [PATCH v4 1/2] run-command: add an "ungroup" option to run_process_parallel()
Date: Wed, 01 Jun 2022 10:09:00 -0700 [thread overview]
Message-ID: <xmqqczfstioj.fsf@gitster.g> (raw)
In-Reply-To: <nycvar.QRO.7.76.6.2206011630400.349@tvgsbejvaqbjf.bet> (Johannes Schindelin's message of "Wed, 1 Jun 2022 18:49:58 +0200 (CEST)")
Johannes Schindelin <Johannes.Schindelin@gmx.de> writes:
>> diff --git a/run-command.c b/run-command.c
>> index a8501e38ceb..324e9548469 100644
>> --- a/run-command.c
>> +++ b/run-command.c
>> @@ -1471,6 +1471,7 @@ enum child_state {
>> GIT_CP_WAIT_CLEANUP,
>> };
>>
>> +int run_processes_parallel_ungroup;
>
> This global variable seems to exist solely to avoid extending the
> signature of `run_processes_parallel_tr2()`. Let's not do that.
It may make the change even noisier, though.
>> @@ -1537,7 +1539,7 @@ static void pp_init(struct parallel_processes *pp,
>> get_next_task_fn get_next_task,
>> start_failure_fn start_failure,
>> task_finished_fn task_finished,
>> - void *data)
>> + void *data, const int ungroup)
>> {
>> int i;
Marking incoming parameter as const is probably a misfeature in C,
but doing so with file-scope static would not hurt too much, so if
this series needs no further reroll, I'd let it pass.
>> for (i = 0; i < n; i++) {
>> strbuf_init(&pp->children[i].err, 0);
>> child_process_init(&pp->children[i].process);
>> + if (!pp->pfd)
>
> It would be more logical to test for `pp->ungroup` than for `!pp->pfd`.
> In other instances below, the patch uses `if (ungroup)` instead. Let's not
> flip-flop between those two conditions, but the latter consistently.
I'd be somewhat sympathetic to the aversion to "flip-flop", but I
strongly disagree with you here.
"ungroup" does not have to stay to be the only reason why we do not
allocate the pp->pfd[] array, and what we care here is "if we are
polling for events, then do this initialization to the array", not
"if ungroup -> we must not have the pfd[] array -> so let's skip
it". We do not have to add more code that depends on that two step
inference when we do not need to.
>> @@ -1606,6 +1614,7 @@ static void pp_cleanup(struct parallel_processes *pp)
>> */
>> static int pp_start_one(struct parallel_processes *pp)
>> {
>> + const int ungroup = pp->ungroup;
>
> It costs readers a couple of moments when they stumble over code that is
> inconsistent with the existing code. In this instance, I find very little
> value in the `const` qualifier. Actually, this entire line is probably not
> worth having because `pp->ungroup` is just 4 characters longer than
> `ungroup`.
>
> This same comment applies to another hunk below, too.
>
> Things like this do take focus away from reviewing the interesting part of
> the contribution, which in particular in the case of a regression fix that
> many are waiting for is something to avoid.
OK.
Thanks.
next prev parent reply other threads:[~2022-06-01 17:09 UTC|newest]
Thread overview: 85+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-04-19 18:59 git 2.36.0 regression: pre-commit hooks no longer have stdout/stderr as tty Anthony Sottile
2022-04-19 23:37 ` Emily Shaffer
2022-04-19 23:52 ` Anthony Sottile
2022-04-20 9:00 ` Phillip Wood
2022-04-20 12:25 ` Ævar Arnfjörð Bjarmason
2022-04-20 16:22 ` Emily Shaffer
2022-04-20 16:42 ` Junio C Hamano
2022-04-20 17:09 ` Emily Shaffer
2022-04-20 17:25 ` Junio C Hamano
2022-04-20 17:41 ` Emily Shaffer
2022-04-21 12:03 ` Ævar Arnfjörð Bjarmason
2022-04-21 17:24 ` Junio C Hamano
2022-04-21 18:40 ` Junio C Hamano
2022-04-20 4:23 ` Junio C Hamano
2022-04-21 12:25 ` [PATCH 0/6] hook API: connect hooks to the TTY again, fixes a v2.36.0 regression Ævar Arnfjörð Bjarmason
2022-04-21 12:25 ` [PATCH 1/6] run-command API: replace run_processes_parallel_tr2() with opts struct Ævar Arnfjörð Bjarmason
2022-04-23 4:24 ` Junio C Hamano
2022-04-28 23:16 ` Emily Shaffer
2022-04-29 16:44 ` Junio C Hamano
2022-04-21 12:25 ` [PATCH 2/6] run-command tests: test stdout of run_command_parallel() Ævar Arnfjörð Bjarmason
2022-04-23 4:24 ` Junio C Hamano
2022-04-21 12:25 ` [PATCH 3/6] run-command: add an "ungroup" option to run_process_parallel() Ævar Arnfjörð Bjarmason
2022-04-23 3:54 ` Junio C Hamano
2022-04-28 23:26 ` Emily Shaffer
2022-04-21 12:25 ` [PATCH 4/6] hook tests: fix redirection logic error in 96e7225b310 Ævar Arnfjörð Bjarmason
2022-04-23 3:54 ` Junio C Hamano
2022-04-21 12:25 ` [PATCH 5/6] hook API: don't redundantly re-set "no_stdin" and "stdout_to_stderr" Ævar Arnfjörð Bjarmason
2022-04-29 22:54 ` Junio C Hamano
2022-04-21 12:25 ` [PATCH 6/6] hook API: fix v2.36.0 regression: hooks should be connected to a TTY Ævar Arnfjörð Bjarmason
2022-04-28 23:31 ` Emily Shaffer
2022-04-29 23:09 ` Junio C Hamano
2022-04-21 17:35 ` [PATCH 0/6] hook API: connect hooks to the TTY again, fixes a v2.36.0 regression Junio C Hamano
2022-04-21 18:50 ` Ævar Arnfjörð Bjarmason
2022-05-18 20:05 ` [PATCH v2 0/8] " Ævar Arnfjörð Bjarmason
2022-05-18 20:05 ` [PATCH v2 1/8] run-command tests: change if/if/... to if/else if/else Ævar Arnfjörð Bjarmason
2022-05-18 20:05 ` [PATCH v2 2/8] run-command API: use "opts" struct for run_processes_parallel{,_tr2}() Ævar Arnfjörð Bjarmason
2022-05-18 21:45 ` Junio C Hamano
2022-05-25 13:18 ` Emily Shaffer
2022-05-18 20:05 ` [PATCH v2 3/8] run-command tests: test stdout of run_command_parallel() Ævar Arnfjörð Bjarmason
2022-05-18 20:05 ` [PATCH v2 4/8] run-command.c: add an initializer for "struct parallel_processes" Ævar Arnfjörð Bjarmason
2022-05-18 20:05 ` [PATCH v2 5/8] run-command: add an "ungroup" option to run_process_parallel() Ævar Arnfjörð Bjarmason
2022-05-18 21:51 ` Junio C Hamano
2022-05-26 17:18 ` Emily Shaffer
2022-05-27 16:08 ` Junio C Hamano
2022-05-18 20:05 ` [PATCH v2 6/8] hook tests: fix redirection logic error in 96e7225b310 Ævar Arnfjörð Bjarmason
2022-05-18 20:05 ` [PATCH v2 7/8] hook API: don't redundantly re-set "no_stdin" and "stdout_to_stderr" Ævar Arnfjörð Bjarmason
2022-05-18 20:05 ` [PATCH v2 8/8] hook API: fix v2.36.0 regression: hooks should be connected to a TTY Ævar Arnfjörð Bjarmason
2022-05-18 21:53 ` Junio C Hamano
2022-05-26 17:23 ` Emily Shaffer
2022-05-26 18:23 ` Ævar Arnfjörð Bjarmason
2022-05-26 18:54 ` Emily Shaffer
2022-05-25 11:30 ` [PATCH v2 0/8] hook API: connect hooks to the TTY again, fixes a v2.36.0 regression Johannes Schindelin
2022-05-25 13:00 ` Ævar Arnfjörð Bjarmason
2022-05-25 16:57 ` Junio C Hamano
2022-05-26 1:10 ` Junio C Hamano
2022-05-26 10:16 ` Ævar Arnfjörð Bjarmason
2022-05-26 16:36 ` Junio C Hamano
2022-05-26 19:13 ` Ævar Arnfjörð Bjarmason
2022-05-26 19:56 ` Junio C Hamano
2022-05-27 9:14 ` [PATCH v3 0/2] " Ævar Arnfjörð Bjarmason
2022-05-27 9:14 ` [PATCH v3 1/2] run-command: add an "ungroup" option to run_process_parallel() Ævar Arnfjörð Bjarmason
2022-05-27 16:58 ` Junio C Hamano
2022-05-27 9:14 ` [PATCH v3 2/2] hook API: fix v2.36.0 regression: hooks should be connected to a TTY Ævar Arnfjörð Bjarmason
2022-05-27 17:17 ` [PATCH v3 0/2] hook API: connect hooks to the TTY again, fixes a v2.36.0 regression Junio C Hamano
2022-05-31 17:32 ` [PATCH v4 " Ævar Arnfjörð Bjarmason
2022-05-31 17:32 ` [PATCH v4 1/2] run-command: add an "ungroup" option to run_process_parallel() Ævar Arnfjörð Bjarmason
2022-06-01 16:49 ` Johannes Schindelin
2022-06-01 17:09 ` Junio C Hamano [this message]
2022-05-31 17:32 ` [PATCH v4 2/2] hook API: fix v2.36.0 regression: hooks should be connected to a TTY Ævar Arnfjörð Bjarmason
2022-06-01 16:50 ` Johannes Schindelin
2022-06-01 16:53 ` [PATCH v4 0/2] hook API: connect hooks to the TTY again, fixes a v2.36.0 regression Johannes Schindelin
2022-06-02 14:07 ` [PATCH v5 " Ævar Arnfjörð Bjarmason
2022-06-02 14:07 ` [PATCH v5 1/2] run-command: add an "ungroup" option to run_process_parallel() Ævar Arnfjörð Bjarmason
2022-06-02 14:07 ` [PATCH v5 2/2] hook API: fix v2.36.0 regression: hooks should be connected to a TTY Ævar Arnfjörð Bjarmason
2022-06-02 20:05 ` [PATCH v5 0/2] hook API: connect hooks to the TTY again, fixes a v2.36.0 regression Junio C Hamano
2022-06-03 8:51 ` Phillip Wood
2022-06-03 9:20 ` Ævar Arnfjörð Bjarmason
2022-06-03 13:21 ` Phillip Wood
2022-06-07 8:49 ` Ævar Arnfjörð Bjarmason
2022-06-07 8:48 ` [PATCH v6 " Ævar Arnfjörð Bjarmason
2022-06-07 8:48 ` [PATCH v6 1/2] run-command: add an "ungroup" option to run_process_parallel() Ævar Arnfjörð Bjarmason
2022-06-17 0:07 ` Emily Shaffer
2022-06-07 8:48 ` [PATCH v6 2/2] hook API: fix v2.36.0 regression: hooks should be connected to a TTY Ævar Arnfjörð Bjarmason
2022-06-07 17:08 ` Junio C Hamano
2022-06-07 17:02 ` [PATCH v6 0/2] hook API: connect hooks to the TTY again, fixes a v2.36.0 regression Junio C Hamano
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