From: Eric Sunshine <sunshine@sunshineco.com>
To: "Đoàn Trần Công Danh" <congdanhqx@gmail.com>
Cc: "Lénaïc Huard" <lenaic@lhuard.fr>,
"Git List" <git@vger.kernel.org>,
"Junio C Hamano" <gitster@pobox.com>,
"Derrick Stolee" <dstolee@microsoft.com>,
"brian m . carlson" <sandals@crustytoothpaste.net>,
"Bagas Sanjaya" <bagasdotme@gmail.com>,
"Phillip Wood" <phillip.wood123@gmail.com>,
"Ævar Arnfjörð Bjarmason" <avarab@gmail.com>
Subject: Re: [PATCH v2 1/1] maintenance: use systemd timers on Linux
Date: Sun, 9 May 2021 22:48:17 -0400 [thread overview]
Message-ID: <CAPig+cQdU_0uPKDkbuz3XqdYePAMNPcF_u+Enx+qfgRGvtiseA@mail.gmail.com> (raw)
In-Reply-To: <YJiKXRywBhhGXC5Q@danh.dev>
On Sun, May 9, 2021 at 9:20 PM Đoàn Trần Công Danh <congdanhqx@gmail.com> wrote:
> On 2021-05-09 23:32:17+0200, Lénaïc Huard <lenaic@lhuard.fr> wrote:
> > +static int systemd_timer_delete_units(const char *cmd)
> > +{
> > + return systemd_timer_enable_unit(0, SCHEDULE_HOURLY, cmd) ||
> > + systemd_timer_enable_unit(0, SCHEDULE_DAILY, cmd) ||
> > + systemd_timer_enable_unit(0, SCHEDULE_WEEKLY, cmd) ||
> > + systemd_timer_delete_unit_templates();
> > +}
>
> Argh, we're disabling those systemd timer units first, by passing 0 as
> first argument of systemd_timer_delete_units.
>
> The fact that I read that twice, and still wrote down above reply
> makes me think that above code is not self-explanatory enough.
> May we switch to something else? Let's say using enum?
This is modeled after existing scheduler functions in this file, in
which the `enable` argument is a simple 0 or 1, so changing this to an
enum just for this function would be inconsistent. Changing all the
functions to `enum` in a preparatory patch could indeed improve
readability, however, that's tangential cleanup which may be outside
the scope of this submission.
> > + file = xfopen(filename, "w");
> > + free(filename);
>
> I'm sure if we should use FREE_AND_NULL(filename) instead?
> Since, filename will be reused later.
Indeed, probably a good idea, as it would make catching mistakes easier.
> > + "ExecStart=\"%1$s/git\" --exec-path=\"%1$s\" for-each-repo --config=maintenance.repo maintenance run --schedule=%%i\n"
>
> I think others have strong opinion on not using "%1$s",
> and prefer simple "%s" and using "exec_path" twice instead.
I brought it up only because I hadn't seen it in Git sources, and
wasn't sure if we'd want to start using it. Aside from Ævar, who
seemed reasonably in favor of it, nobody else chimed in, so it could
go either way, I suppose.
> > +test_systemd_analyze_verify () {
> > + if test_have_prereq SYSTEMD_ANALYZE
> > + then
> > + systemd-analyze verify "$@"
> > + else
> > + true
>
> The "else" leg is not necessary.
This was patterned after the existing test_xmllint() function in this
file which has the `else true` leg. I wrote test_xmllint(), so I'll
take blame. But you're right, the `if` will return success if the
prerequisite is not set, so the `else` leg is indeed not needed.
(Cleaning up the test_xmllint() function is outside the scope of this
patch.)
> > +test_expect_success 'start and stop Linux/systemd maintenance' '
> > + write_script print-args <<-\EOF &&
> > + echo $* >>args
>
> To avoid any possible incompatibility with zillion echo implementation
> out there. printf should be prefered over echo. Not a in this test
> case, however, it costs us nothing anyway.
>
> printf "%s\n" "$*"
This, too, is patterned after existing auxiliary scripts created by
these test functions, and you're correct that it's potentially
dangerous. A manual inspection of all the existing instances shows
that `echo $*` happens to be safe for those cases but that doesn't
excuse being sloppy about it, so the existing cases probably ought to
be cleaned up. But, again, that is outside the scope of this series.
For this particular case, though...
> > + for frequency in hourly daily weekly
> > + do
> > + echo "--user enable --now git-maintenance@${frequency}.timer" >>expect || return 1
> > + done &&
>
> And here, we can have a nicer syntax with printf:
>
> printf "--user enable --now git-maintenance@%s.timer\n" hourly daily weekly >expect &&
>
> With printf, we don't even need "rm -f expect" above.
... you're quite correct that `printf` is the way to go both here and
in the generated `print-args` script since these arguments start with
hyphen.
next prev parent reply other threads:[~2021-05-10 2:48 UTC|newest]
Thread overview: 138+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-01 14:52 [PATCH] maintenance: use systemd timers on Linux Lénaïc Huard
2021-05-01 20:02 ` brian m. carlson
2021-05-02 5:28 ` Bagas Sanjaya
2021-05-02 6:49 ` Eric Sunshine
2021-05-02 6:45 ` Eric Sunshine
2021-05-02 14:10 ` Phillip Wood
2021-05-05 12:19 ` Đoàn Trần Công Danh
2021-05-05 14:57 ` Phillip Wood
2021-05-05 12:01 ` Ævar Arnfjörð Bjarmason
2021-05-09 22:34 ` Lénaïc Huard
2021-05-10 13:03 ` Ævar Arnfjörð Bjarmason
2021-05-02 11:12 ` Bagas Sanjaya
2021-05-03 12:04 ` Derrick Stolee
2021-05-09 21:32 ` [PATCH v2 0/1] " Lénaïc Huard
2021-05-09 21:32 ` [PATCH v2 1/1] " Lénaïc Huard
2021-05-10 1:20 ` Đoàn Trần Công Danh
2021-05-10 2:48 ` Eric Sunshine [this message]
2021-05-10 6:25 ` Junio C Hamano
2021-05-12 0:29 ` Đoàn Trần Công Danh
2021-05-12 6:59 ` Felipe Contreras
2021-05-12 13:26 ` Phillip Wood
2021-05-12 13:38 ` Phillip Wood
2021-05-12 15:41 ` Đoàn Trần Công Danh
2021-05-10 18:03 ` Phillip Wood
2021-05-10 18:25 ` Eric Sunshine
2021-05-10 20:09 ` Phillip Wood
2021-05-10 20:52 ` Eric Sunshine
2021-06-08 14:55 ` Lénaïc Huard
2021-05-10 19:15 ` Martin Ågren
2021-05-11 14:50 ` Phillip Wood
2021-05-11 17:31 ` Derrick Stolee
2021-05-20 22:13 ` [PATCH v3 0/4] " Lénaïc Huard
2021-05-20 22:13 ` [PATCH v3 1/4] cache.h: rename "xdg_config_home" to "xdg_config_home_git" Lénaïc Huard
2021-05-20 23:44 ` Đoàn Trần Công Danh
2021-05-20 22:13 ` [PATCH v3 2/4] maintenance: introduce ENABLE/DISABLE for code clarity Lénaïc Huard
2021-05-20 22:13 ` [PATCH v3 3/4] maintenance: `git maintenance run` learned `--scheduler=<scheduler>` Lénaïc Huard
2021-05-21 9:52 ` Bagas Sanjaya
2021-05-20 22:13 ` [PATCH v3 4/4] maintenance: optionally use systemd timers on Linux Lénaïc Huard
2021-05-21 9:59 ` Bagas Sanjaya
2021-05-21 16:59 ` Derrick Stolee
2021-05-22 6:57 ` Johannes Schindelin
2021-05-23 18:36 ` Felipe Contreras
2021-05-23 23:27 ` brian m. carlson
2021-05-24 1:18 ` Felipe Contreras
2021-05-24 7:03 ` Ævar Arnfjörð Bjarmason
2021-05-24 15:51 ` Junio C Hamano
2021-05-25 1:50 ` Johannes Schindelin
2021-05-25 11:13 ` Felipe Contreras
2021-05-26 10:29 ` CoC, inclusivity etc. (was "Re: [...] systemd timers on Linux") Ævar Arnfjörð Bjarmason
2021-05-26 16:05 ` Felipe Contreras
2021-05-27 14:24 ` Jeff King
2021-05-27 17:30 ` Felipe Contreras
2021-05-27 23:58 ` Junio C Hamano
2021-05-28 14:44 ` Phillip Susi
2021-05-30 21:58 ` Jeff King
2021-05-24 17:52 ` [PATCH v3 4/4] maintenance: optionally use systemd timers on Linux Felipe Contreras
2021-05-24 7:15 ` [PATCH v4 0/4] add support for " Lénaïc Huard
2021-05-24 7:15 ` [PATCH v4 1/4] cache.h: Introduce a generic "xdg_config_home_for(…)" function Lénaïc Huard
2021-05-24 9:33 ` Phillip Wood
2021-05-24 12:23 ` Đoàn Trần Công Danh
2021-05-24 7:15 ` [PATCH v4 2/4] maintenance: introduce ENABLE/DISABLE for code clarity Lénaïc Huard
2021-05-24 9:41 ` Phillip Wood
2021-05-24 12:36 ` Đoàn Trần Công Danh
2021-05-25 7:18 ` Lénaïc Huard
2021-05-25 8:02 ` Junio C Hamano
2021-05-24 9:47 ` Ævar Arnfjörð Bjarmason
2021-05-24 7:15 ` [PATCH v4 3/4] maintenance: `git maintenance run` learned `--scheduler=<scheduler>` Lénaïc Huard
2021-05-24 10:12 ` Phillip Wood
2021-05-30 6:39 ` Lénaïc Huard
2021-05-30 10:16 ` Phillip Wood
2021-05-24 7:15 ` [PATCH v4 4/4] maintenance: add support for systemd timers on Linux Lénaïc Huard
2021-05-24 9:55 ` Ævar Arnfjörð Bjarmason
2021-05-24 16:39 ` Eric Sunshine
2021-05-24 18:08 ` Felipe Contreras
2021-05-26 10:26 ` Phillip Wood
2021-05-24 9:04 ` [PATCH v4 0/4] " Junio C Hamano
2021-06-08 13:39 ` [PATCH v5 0/3] " Lénaïc Huard
2021-06-08 13:39 ` [PATCH v5 1/3] cache.h: Introduce a generic "xdg_config_home_for(…)" function Lénaïc Huard
2021-06-08 13:39 ` [PATCH v5 2/3] maintenance: `git maintenance run` learned `--scheduler=<scheduler>` Lénaïc Huard
2021-06-08 13:40 ` [PATCH v5 3/3] maintenance: add support for systemd timers on Linux Lénaïc Huard
2021-06-09 9:34 ` Jeff King
2021-06-09 15:01 ` Phillip Wood
2021-06-09 0:21 ` [PATCH v5 0/3] " Junio C Hamano
2021-06-09 14:54 ` Phillip Wood
2021-06-12 16:50 ` [PATCH v6 0/3] maintenance: " Lénaïc Huard
2021-06-12 16:50 ` [PATCH v6 1/3] cache.h: Introduce a generic "xdg_config_home_for(…)" function Lénaïc Huard
2021-06-12 16:50 ` [PATCH v6 2/3] maintenance: `git maintenance run` learned `--scheduler=<scheduler>` Lénaïc Huard
2021-06-14 4:36 ` Eric Sunshine
2021-06-16 18:12 ` Derrick Stolee
2021-06-17 4:11 ` Eric Sunshine
2021-06-17 14:26 ` Phillip Wood
2021-07-02 15:04 ` Lénaïc Huard
2021-06-12 16:50 ` [PATCH v6 3/3] maintenance: add support for systemd timers on Linux Lénaïc Huard
2021-07-02 14:25 ` [PATCH v7 0/3] " Lénaïc Huard
2021-07-02 14:25 ` [PATCH v7 1/3] cache.h: Introduce a generic "xdg_config_home_for(…)" function Lénaïc Huard
2021-07-02 14:25 ` [PATCH v7 2/3] maintenance: `git maintenance run` learned `--scheduler=<scheduler>` Lénaïc Huard
2021-07-06 19:56 ` Ævar Arnfjörð Bjarmason
2021-07-06 20:52 ` Junio C Hamano
2021-07-13 0:15 ` Jeff King
2021-07-13 2:22 ` Eric Sunshine
2021-07-13 3:56 ` Jeff King
2021-07-13 5:17 ` Eric Sunshine
2021-07-13 7:04 ` Bagas Sanjaya
2021-07-06 21:18 ` Felipe Contreras
2021-08-23 20:06 ` Lénaïc Huard
2021-08-23 22:30 ` Junio C Hamano
2021-07-02 14:25 ` [PATCH v7 3/3] maintenance: add support for systemd timers on Linux Lénaïc Huard
2021-07-06 20:03 ` Ævar Arnfjörð Bjarmason
2021-07-02 18:18 ` [PATCH v7 0/3] " Junio C Hamano
2021-07-06 13:18 ` Phillip Wood
2021-08-23 20:40 ` [PATCH v8 " Lénaïc Huard
2021-08-23 20:40 ` [PATCH v8 1/3] cache.h: Introduce a generic "xdg_config_home_for(…)" function Lénaïc Huard
2021-08-23 20:40 ` [PATCH v8 2/3] maintenance: `git maintenance run` learned `--scheduler=<scheduler>` Lénaïc Huard
2021-08-24 17:45 ` Derrick Stolee
2021-08-23 20:40 ` [PATCH v8 3/3] maintenance: add support for systemd timers on Linux Lénaïc Huard
2021-08-24 17:45 ` Derrick Stolee
2021-08-24 17:47 ` [PATCH v8 0/3] " Derrick Stolee
2021-08-27 21:02 ` [PATCH v9 " Lénaïc Huard
2021-08-27 21:02 ` [PATCH v9 1/3] cache.h: Introduce a generic "xdg_config_home_for(…)" function Lénaïc Huard
2021-08-27 21:02 ` [PATCH v9 2/3] maintenance: `git maintenance run` learned `--scheduler=<scheduler>` Lénaïc Huard
2021-08-27 23:54 ` Ramsay Jones
2021-08-27 21:02 ` [PATCH v9 3/3] maintenance: add support for systemd timers on Linux Lénaïc Huard
2021-09-04 20:54 ` [PATCH v10 0/3] " Lénaïc Huard
2021-09-04 20:54 ` [PATCH v10 1/3] cache.h: Introduce a generic "xdg_config_home_for(…)" function Lénaïc Huard
2021-09-04 20:54 ` [PATCH v10 2/3] maintenance: `git maintenance run` learned `--scheduler=<scheduler>` Lénaïc Huard
2021-09-04 20:55 ` [PATCH v10 3/3] maintenance: add support for systemd timers on Linux Lénaïc Huard
2021-09-07 16:48 ` [PATCH v10 0/3] " Derrick Stolee
2021-09-08 11:44 ` Derrick Stolee
2021-09-09 5:52 ` Lénaïc Huard
2021-09-09 19:55 ` Derrick Stolee
2021-09-27 12:50 ` Ævar Arnfjörð Bjarmason
2021-09-27 21:44 ` Lénaïc Huard
2021-08-17 17:22 ` [PATCH v5 0/3] " Derrick Stolee
2021-08-17 19:43 ` Phillip Wood
2021-08-17 20:29 ` Derrick Stolee
2021-08-18 5:56 ` Lénaïc Huard
2021-08-18 13:28 ` Derrick Stolee
2021-08-18 18:23 ` Junio C Hamano
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