From: Neeraj Singh <nksingh85@gmail.com>
To: Junio C Hamano <gitster@pobox.com>
Cc: "Neeraj Singh via GitGitGadget" <gitgitgadget@gmail.com>,
"Git List" <git@vger.kernel.org>,
"Johannes Schindelin" <Johannes.Schindelin@gmx.de>,
"Ævar Arnfjörð Bjarmason" <avarab@gmail.com>,
"Patrick Steinhardt" <ps@pks.im>,
"Jeff Hostetler" <jeffhost@microsoft.com>,
"Bagas Sanjaya" <bagasdotme@gmail.com>,
"Jiang Xin" <worldhello.net@gmail.com>,
"Neeraj K. Singh" <neerajsi@microsoft.com>
Subject: Re: [PATCH v5 11/14] core.fsyncmethod: tests for batch mode
Date: Wed, 30 Mar 2022 20:55:51 -0700 [thread overview]
Message-ID: <CANQDOdfoDSzpWbmnyaPyi9PoftbS7P7=8Y+RS_Bm3t0ggXpLEg@mail.gmail.com> (raw)
In-Reply-To: <xmqqbkxn8g0r.fsf@gitster.g>
On Wed, Mar 30, 2022 at 11:13 AM Junio C Hamano <gitster@pobox.com> wrote:
>
> "Neeraj Singh via GitGitGadget" <gitgitgadget@gmail.com> writes:
>
> > diff --git a/t/lib-unique-files.sh b/t/lib-unique-files.sh
> > new file mode 100644
> > index 00000000000..34c01a65256
> > --- /dev/null
> > +++ b/t/lib-unique-files.sh
> > @@ -0,0 +1,34 @@
> > +# Helper to create files with unique contents
> > +
> > +# Create multiple files with unique contents within this test run. Takes the
> > +# number of directories, the number of files in each directory, and the base
> > +# directory.
> > +#
> > +# test_create_unique_files 2 3 my_dir -- Creates 2 directories with 3 files
> > +# each in my_dir, all with contents
> > +# different from previous invocations
> > +# of this command in this run.
> > +
> > +test_create_unique_files () {
> > + test "$#" -ne 3 && BUG "3 param"
> > +
> > + local dirs="$1" &&
> > + local files="$2" &&
> > + local basedir="$3" &&
> > + local counter=0 &&
>
> The cover letter mentioned that in this round, "local var=val" is
> avoided?
>
Whoops.. I guess I wasn't looking widely enough. I noticed failures
on my Ubuntu system that uses dash.
> I've seen instances of local being "curious", e.g.
> https://lore.kernel.org/git/20220125092419.cgtfw32nk2niazfk@carbon/
> and the discussion indicates that it may still be relevant.
>
> > + local i &&
> > + local j &&
> > + test_tick &&
> > + local basedata=$basedir$test_tick &&
> > + rm -rf "$basedir" &&
> > + for i in $(test_seq $dirs)
> > + do
> > + local dir=$basedir/dir$i &&
>
> This, too.
>
> To summarize the findings from the thread is:
>
> - very old releases of /bin/dash that predates Git, like 0.3.8,
> would not correctly handle assignment on "local" at all. It may
> not matter to us.
>
> - semi-old /bin/dash 0.5.10, which is still in use, mishandled
> 'local var=$val', but 'local var="$val"' is an acceptable
> workaround for the bug. "git grep" tells us that we use this
> form in our shell scripts quite a lot, so we may be OK.
>
> - /bin/dash 0.5.11, which was tagged mid 2020, and newer would glok
> 'local var=$val' just fine even $val has $IFS whitespace in it.
>
> So, I'd say the safe practice we should adopt is to use "local" one
> per variable, assignment to the variable on the same line of "local"
> is OK, but unlike the regular assignment, older dash may mishandle
> the right-hand-side unless it is quoted, i.e.
>
> local var='string literal'
> local var="$variable interpolation"
>
Thanks for updating me on the documentation. I think I'll go back to
one-line assignments with the proper quotations and single variables,
just to keep things short and consistent. I've been looking up
everything as I go with these shell scripts, but there's a lot of
subtlety. CMD batch files are even uglier, but I've had many years to
learn the common practices there.
I'll ask a question on the perf test patch on a related shell topic.
Thanks,
Neeraj
next prev parent reply other threads:[~2022-03-31 4:08 UTC|newest]
Thread overview: 175+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-15 21:30 [PATCH 0/7] core.fsyncmethod: add 'batch' mode for faster fsyncing of multiple objects Neeraj K. Singh via GitGitGadget
2022-03-15 21:30 ` [PATCH 1/7] bulk-checkin: rename 'state' variable and separate 'plugged' boolean Neeraj Singh via GitGitGadget
2022-03-16 5:33 ` Junio C Hamano
2022-03-16 7:33 ` Neeraj Singh
2022-03-16 16:14 ` Junio C Hamano
2022-03-16 17:59 ` Neeraj Singh
2022-03-16 18:10 ` Junio C Hamano
2022-03-16 19:50 ` Neeraj Singh
2022-03-15 21:30 ` [PATCH 2/7] core.fsyncmethod: batched disk flushes for loose-objects Neeraj Singh via GitGitGadget
2022-03-16 7:31 ` Patrick Steinhardt
2022-03-16 18:21 ` Neeraj Singh
2022-03-17 5:48 ` Patrick Steinhardt
2022-03-16 11:50 ` Bagas Sanjaya
2022-03-16 19:59 ` Neeraj Singh
2022-03-15 21:30 ` [PATCH 3/7] update-index: use the bulk-checkin infrastructure Neeraj Singh via GitGitGadget
2022-03-15 21:30 ` [PATCH 4/7] unpack-objects: " Neeraj Singh via GitGitGadget
2022-03-15 21:30 ` [PATCH 5/7] core.fsync: use batch mode and sync loose objects by default on Windows Neeraj Singh via GitGitGadget
2022-03-15 21:30 ` [PATCH 6/7] core.fsyncmethod: tests for batch mode Neeraj Singh via GitGitGadget
2022-03-15 21:30 ` [PATCH 7/7] core.fsyncmethod: performance tests for add and stash Neeraj Singh via GitGitGadget
2022-03-20 7:15 ` [PATCH v2 0/7] core.fsyncmethod: add 'batch' mode for faster fsyncing of multiple objects Neeraj K. Singh via GitGitGadget
2022-03-20 7:15 ` [PATCH v2 1/7] bulk-checkin: rename 'state' variable and separate 'plugged' boolean Neeraj Singh via GitGitGadget
2022-03-20 7:15 ` [PATCH v2 2/7] core.fsyncmethod: batched disk flushes for loose-objects Neeraj Singh via GitGitGadget
2022-03-21 14:41 ` Ævar Arnfjörð Bjarmason
2022-03-21 18:28 ` Neeraj Singh
2022-03-21 15:47 ` Ævar Arnfjörð Bjarmason
2022-03-21 20:14 ` Neeraj Singh
2022-03-21 20:18 ` Ævar Arnfjörð Bjarmason
2022-03-22 0:13 ` Neeraj Singh
2022-03-22 8:52 ` Ævar Arnfjörð Bjarmason
2022-03-22 20:05 ` Neeraj Singh
2022-03-23 3:47 ` [RFC PATCH 0/7] bottom-up ns/batched-fsync & "plugging" in object-file.c Ævar Arnfjörð Bjarmason
2022-03-23 3:47 ` [RFC PATCH 1/7] write-or-die.c: remove unused fsync_component() function Ævar Arnfjörð Bjarmason
2022-03-23 5:27 ` Neeraj Singh
2022-03-23 3:47 ` [RFC PATCH 2/7] unpack-objects: add skeleton HASH_N_OBJECTS{,_{FIRST,LAST}} flags Ævar Arnfjörð Bjarmason
2022-03-23 3:47 ` [RFC PATCH 3/7] object-file: pass down unpack-objects.c flags for "bulk" checkin Ævar Arnfjörð Bjarmason
2022-03-23 3:47 ` [RFC PATCH 4/7] update-index: use a utility function for stdin consumption Ævar Arnfjörð Bjarmason
2022-03-23 3:47 ` [RFC PATCH 5/7] update-index: pass down an "oflags" argument Ævar Arnfjörð Bjarmason
2022-03-23 3:47 ` [RFC PATCH 6/7] update-index: rename "buf" to "line" Ævar Arnfjörð Bjarmason
2022-03-23 3:47 ` [RFC PATCH 7/7] update-index: make use of HASH_N_OBJECTS{,_{FIRST,LAST}} flags Ævar Arnfjörð Bjarmason
2022-03-23 5:51 ` Neeraj Singh
2022-03-23 9:48 ` Ævar Arnfjörð Bjarmason
2022-03-23 20:19 ` Neeraj Singh
2022-03-23 14:18 ` [RFC PATCH v2 0/7] bottom-up ns/batched-fsync & "plugging" in object-file.c Ævar Arnfjörð Bjarmason
2022-03-23 14:18 ` [RFC PATCH v2 1/7] unpack-objects: add skeleton HASH_N_OBJECTS{,_{FIRST,LAST}} flags Ævar Arnfjörð Bjarmason
2022-03-23 20:23 ` Neeraj Singh
2022-03-23 14:18 ` [RFC PATCH v2 2/7] object-file: pass down unpack-objects.c flags for "bulk" checkin Ævar Arnfjörð Bjarmason
2022-03-23 20:25 ` Neeraj Singh
2022-03-23 14:18 ` [RFC PATCH v2 3/7] update-index: pass down skeleton "oflags" argument Ævar Arnfjörð Bjarmason
2022-03-23 14:18 ` [RFC PATCH v2 4/7] update-index: have the index fsync() flush the loose objects Ævar Arnfjörð Bjarmason
2022-03-23 20:30 ` Neeraj Singh
2022-03-23 14:18 ` [RFC PATCH v2 5/7] add: use WLI_NEED_LOOSE_FSYNC for new "only the index" bulk fsync() Ævar Arnfjörð Bjarmason
2022-03-23 14:18 ` [RFC PATCH v2 6/7] fsync docs: update for new syncing semantics Ævar Arnfjörð Bjarmason
2022-03-23 14:18 ` [RFC PATCH v2 7/7] fsync docs: add new fsyncMethod.batch.quarantine, elaborate on old Ævar Arnfjörð Bjarmason
2022-03-23 21:08 ` Neeraj Singh
2022-03-21 17:30 ` [PATCH v2 2/7] core.fsyncmethod: batched disk flushes for loose-objects Junio C Hamano
2022-03-21 20:23 ` Neeraj Singh
2022-03-23 13:26 ` Ævar Arnfjörð Bjarmason
2022-03-24 2:04 ` Neeraj Singh
2022-03-20 7:15 ` [PATCH v2 3/7] update-index: use the bulk-checkin infrastructure Neeraj Singh via GitGitGadget
2022-03-21 15:01 ` Ævar Arnfjörð Bjarmason
2022-03-21 22:09 ` Neeraj Singh
2022-03-21 23:16 ` Ævar Arnfjörð Bjarmason
2022-03-21 17:50 ` Junio C Hamano
2022-03-21 22:18 ` Neeraj Singh
2022-03-20 7:15 ` [PATCH v2 4/7] unpack-objects: " Neeraj Singh via GitGitGadget
2022-03-21 17:55 ` Junio C Hamano
2022-03-21 23:02 ` Neeraj Singh
2022-03-22 20:54 ` Neeraj Singh
2022-03-20 7:15 ` [PATCH v2 5/7] core.fsync: use batch mode and sync loose objects by default on Windows Neeraj Singh via GitGitGadget
2022-03-20 7:15 ` [PATCH v2 6/7] core.fsyncmethod: tests for batch mode Neeraj Singh via GitGitGadget
2022-03-21 18:34 ` Junio C Hamano
2022-03-22 5:54 ` Neeraj Singh
2022-03-20 7:16 ` [PATCH v2 7/7] core.fsyncmethod: performance tests for add and stash Neeraj Singh via GitGitGadget
2022-03-21 17:03 ` [PATCH v2 0/7] core.fsyncmethod: add 'batch' mode for faster fsyncing of multiple objects Junio C Hamano
2022-03-21 18:14 ` Neeraj Singh
2022-03-21 20:49 ` Junio C Hamano
2022-03-24 4:58 ` [PATCH v3 00/11] " Neeraj K. Singh via GitGitGadget
2022-03-24 4:58 ` [PATCH v3 01/11] bulk-checkin: rebrand plug/unplug APIs as 'odb transactions' Neeraj Singh via GitGitGadget
2022-03-24 16:10 ` Ævar Arnfjörð Bjarmason
2022-03-24 17:52 ` Neeraj Singh
2022-03-24 4:58 ` [PATCH v3 02/11] bulk-checkin: rename 'state' variable and separate 'plugged' boolean Neeraj Singh via GitGitGadget
2022-03-24 4:58 ` [PATCH v3 03/11] object-file: pass filename to fsync_or_die Neeraj Singh via GitGitGadget
2022-03-24 4:58 ` [PATCH v3 04/11] core.fsyncmethod: batched disk flushes for loose-objects Neeraj Singh via GitGitGadget
2022-03-24 4:58 ` [PATCH v3 05/11] update-index: use the bulk-checkin infrastructure Neeraj Singh via GitGitGadget
2022-03-24 18:18 ` Junio C Hamano
2022-03-24 20:25 ` Neeraj Singh
2022-03-24 21:34 ` Junio C Hamano
2022-03-24 22:21 ` Neeraj Singh
2022-03-24 4:58 ` [PATCH v3 06/11] unpack-objects: " Neeraj Singh via GitGitGadget
2022-03-24 4:58 ` [PATCH v3 07/11] core.fsync: use batch mode and sync loose objects by default on Windows Neeraj Singh via GitGitGadget
2022-03-24 4:58 ` [PATCH v3 08/11] test-lib-functions: add parsing helpers for ls-files and ls-tree Neeraj Singh via GitGitGadget
2022-03-24 4:58 ` [PATCH v3 09/11] core.fsyncmethod: tests for batch mode Neeraj Singh via GitGitGadget
2022-03-24 16:29 ` Ævar Arnfjörð Bjarmason
2022-03-24 18:23 ` Neeraj Singh
2022-03-26 15:35 ` Ævar Arnfjörð Bjarmason
2022-03-24 4:58 ` [PATCH v3 10/11] core.fsyncmethod: performance tests for add and stash Neeraj Singh via GitGitGadget
2022-03-24 4:58 ` [PATCH v3 11/11] core.fsyncmethod: correctly camel-case warning message Neeraj Singh via GitGitGadget
2022-03-24 17:44 ` [PATCH v3 00/11] core.fsyncmethod: add 'batch' mode for faster fsyncing of multiple objects Junio C Hamano
2022-03-24 19:21 ` Neeraj Singh
2022-03-29 0:42 ` [PATCH v4 00/13] " Neeraj K. Singh via GitGitGadget
2022-03-29 0:42 ` [PATCH v4 01/13] bulk-checkin: rename 'state' variable and separate 'plugged' boolean Neeraj Singh via GitGitGadget
2022-03-29 0:42 ` [PATCH v4 02/13] bulk-checkin: rebrand plug/unplug APIs as 'odb transactions' Neeraj Singh via GitGitGadget
2022-03-29 0:42 ` [PATCH v4 03/13] object-file: pass filename to fsync_or_die Neeraj Singh via GitGitGadget
2022-03-29 0:42 ` [PATCH v4 04/13] core.fsyncmethod: batched disk flushes for loose-objects Neeraj Singh via GitGitGadget
2022-03-29 0:42 ` [PATCH v4 05/13] cache-tree: use ODB transaction around writing a tree Neeraj Singh via GitGitGadget
2022-03-29 0:42 ` [PATCH v4 06/13] update-index: use the bulk-checkin infrastructure Neeraj Singh via GitGitGadget
2022-03-29 0:42 ` [PATCH v4 07/13] unpack-objects: " Neeraj Singh via GitGitGadget
2022-03-29 0:42 ` [PATCH v4 08/13] core.fsync: use batch mode and sync loose objects by default on Windows Neeraj Singh via GitGitGadget
2022-03-29 0:42 ` [PATCH v4 09/13] test-lib-functions: add parsing helpers for ls-files and ls-tree Neeraj Singh via GitGitGadget
2022-03-29 0:42 ` [PATCH v4 10/13] core.fsyncmethod: tests for batch mode Neeraj Singh via GitGitGadget
2022-03-29 0:42 ` [PATCH v4 11/13] t/perf: add iteration setup mechanism to perf-lib Neeraj Singh via GitGitGadget
2022-03-29 17:14 ` Neeraj Singh
2022-03-29 18:50 ` Junio C Hamano
2022-03-29 0:42 ` [PATCH v4 12/13] core.fsyncmethod: performance tests for add and stash Neeraj Singh via GitGitGadget
2022-03-29 17:38 ` Neeraj Singh
2022-03-29 0:42 ` [PATCH v4 13/13] core.fsyncmethod: correctly camel-case warning message Neeraj Singh via GitGitGadget
2022-03-29 10:47 ` [PATCH v4 00/13] core.fsyncmethod: add 'batch' mode for faster fsyncing of multiple objects Ævar Arnfjörð Bjarmason
2022-03-29 17:09 ` Neeraj Singh
2022-03-29 11:45 ` Ævar Arnfjörð Bjarmason
2022-03-29 16:51 ` Neeraj Singh
2022-03-30 5:05 ` [PATCH v5 00/14] " Neeraj K. Singh via GitGitGadget
2022-03-30 5:05 ` [PATCH v5 01/14] bulk-checkin: rename 'state' variable and separate 'plugged' boolean Neeraj Singh via GitGitGadget
2022-03-30 17:11 ` Junio C Hamano
2022-03-30 18:34 ` Neeraj Singh
2022-03-30 20:24 ` Junio C Hamano
2022-03-31 4:17 ` Neeraj Singh
2022-03-31 17:50 ` Junio C Hamano
2022-03-31 19:08 ` Neeraj Singh
2022-03-30 5:05 ` [PATCH v5 02/14] bulk-checkin: rebrand plug/unplug APIs as 'odb transactions' Neeraj Singh via GitGitGadget
2022-03-30 17:17 ` Junio C Hamano
2022-03-31 5:51 ` Neeraj Singh
2022-03-30 5:05 ` [PATCH v5 03/14] object-file: pass filename to fsync_or_die Neeraj Singh via GitGitGadget
2022-03-30 17:18 ` Junio C Hamano
2022-03-30 17:54 ` Neeraj Singh
2022-03-30 5:05 ` [PATCH v5 04/14] core.fsyncmethod: batched disk flushes for loose-objects Neeraj Singh via GitGitGadget
2022-03-30 17:37 ` Junio C Hamano
2022-03-31 6:28 ` Neeraj Singh
2022-03-31 18:05 ` Junio C Hamano
2022-03-31 19:18 ` Neeraj Singh
2022-04-01 15:56 ` Junio C Hamano
2022-03-30 5:05 ` [PATCH v5 05/14] cache-tree: use ODB transaction around writing a tree Neeraj Singh via GitGitGadget
2022-03-30 17:46 ` Junio C Hamano
2022-03-30 19:04 ` Neeraj Singh
2022-03-30 5:05 ` [PATCH v5 06/14] builtin/add: add ODB transaction around add_files_to_cache Neeraj Singh via GitGitGadget
2022-03-30 17:47 ` Junio C Hamano
2022-03-30 5:05 ` [PATCH v5 07/14] update-index: use the bulk-checkin infrastructure Neeraj Singh via GitGitGadget
2022-03-30 17:52 ` Junio C Hamano
2022-03-30 19:09 ` Neeraj Singh
2022-03-30 5:05 ` [PATCH v5 08/14] unpack-objects: " Neeraj Singh via GitGitGadget
2022-03-30 5:05 ` [PATCH v5 09/14] core.fsync: use batch mode and sync loose objects by default on Windows Neeraj Singh via GitGitGadget
2022-03-30 5:05 ` [PATCH v5 10/14] test-lib-functions: add parsing helpers for ls-files and ls-tree Neeraj Singh via GitGitGadget
2022-03-30 5:05 ` [PATCH v5 11/14] core.fsyncmethod: tests for batch mode Neeraj Singh via GitGitGadget
2022-03-30 18:13 ` Junio C Hamano
2022-03-31 3:55 ` Neeraj Singh [this message]
2022-03-30 5:05 ` [PATCH v5 12/14] t/perf: add iteration setup mechanism to perf-lib Neeraj Singh via GitGitGadget
2022-03-30 5:05 ` [PATCH v5 13/14] core.fsyncmethod: performance tests for batch mode Neeraj Singh via GitGitGadget
2022-03-31 4:09 ` Neeraj Singh
2022-03-30 5:05 ` [PATCH v5 14/14] core.fsyncmethod: correctly camel-case warning message Neeraj Singh via GitGitGadget
2022-04-05 5:20 ` [PATCH v6 00/12] core.fsyncmethod: add 'batch' mode for faster fsyncing of multiple objects nksingh85
2022-04-06 20:32 ` Junio C Hamano
2022-05-19 21:47 ` Junio C Hamano
2022-05-19 21:54 ` Neeraj Singh
2022-05-24 12:31 ` Johannes Schindelin
2022-04-05 5:20 ` [PATCH v6 01/12] bulk-checkin: rename 'state' variable and separate 'plugged' boolean nksingh85
2022-04-05 5:20 ` [PATCH v6 02/12] bulk-checkin: rebrand plug/unplug APIs as 'odb transactions' nksingh85
2022-04-05 5:20 ` [PATCH v6 03/12] core.fsyncmethod: batched disk flushes for loose-objects nksingh85
2022-04-05 5:20 ` [PATCH v6 04/12] cache-tree: use ODB transaction around writing a tree nksingh85
2022-04-05 5:20 ` [PATCH v6 05/12] builtin/add: add ODB transaction around add_files_to_cache nksingh85
2022-04-05 5:20 ` [PATCH v6 06/12] update-index: use the bulk-checkin infrastructure nksingh85
2022-04-05 5:20 ` [PATCH v6 07/12] unpack-objects: " nksingh85
2022-04-05 5:20 ` [PATCH v6 08/12] core.fsync: use batch mode and sync loose objects by default on Windows nksingh85
2022-04-05 5:20 ` [PATCH v6 09/12] test-lib-functions: add parsing helpers for ls-files and ls-tree nksingh85
2022-04-05 5:20 ` [PATCH v6 10/12] core.fsyncmethod: tests for batch mode nksingh85
2022-04-05 5:20 ` [PATCH v6 11/12] t/perf: add iteration setup mechanism to perf-lib nksingh85
2022-04-05 5:20 ` [PATCH v6 12/12] core.fsyncmethod: performance tests for batch mode nksingh85
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