From: Stefan Beller <sbeller@google.com>
To: Junio C Hamano <gitster@pobox.com>
Cc: git <git@vger.kernel.org>
Subject: Re: [PATCH 4/6] builtin/submodule--helper: store update_clone information in a struct
Date: Mon, 16 Jul 2018 16:55:59 -0700 [thread overview]
Message-ID: <CAGZ79kaOy0pZJCob4d=66FQLaOu_q_BAJeFc94xkFa0SSqYigw@mail.gmail.com> (raw)
In-Reply-To: <xmqqo9f7t1jy.fsf@gitster-ct.c.googlers.com>
On Mon, Jul 16, 2018 at 12:37 PM Junio C Hamano <gitster@pobox.com> wrote:
>
> Stefan Beller <sbeller@google.com> writes:
>
> > The information that is printed for update_submodules in
> > 'submodule--helper update-clone' and consumed by 'git submodule update'
> > is stored as a string per submodule. This made sense at the time of
> > 48308681b07 (git submodule update: have a dedicated helper for cloning,
> > 2016-02-29), but as we want to migrate the rest of the submodule update
> > into C, we're better off having access to the raw information in a helper
> > struct.
>
> The reasoning above makes sense, but I have a few niggles on the
> naming.
>
> * Anything you'd place to keep track of the state is "information",
> so a whole "_information" suffix to the structure name does not
> add much value. We've seen our fair share of (meaningless)
> "_data" suffix used in many places but I think the overly long
> "_information" that is equally meaningless trumps them. I think
> we also have "_info", but if we are not going to have a beter
> name, let's not be original and stick to "_data" like other
> existing codepath. An alternative with more meaningful name is
> of course better, though, but it is not all that much worth to
> spend too many braincycles on it.
agreed.
> * Is the fact that these parameters necessary to help populating
> the submodule repository are sent on a line to external process
> the most important aspect of the submodule_lines[] array? As
In terms of what the submodule--helper does, it is.
It is not the most important aspect in the big picture, or once
we finish the migration to not have shell interpret its output.
> this step is a preparation to migrate out of that line/text
> oriented IPC, I think line-ness is the least important and
> interesting thing to name the variable with.
ok.
> If I were writing this patch, perhaps I'd do
>
> struct update_clone_data *update_clone;
> int update_clone_nr, update_clone_alloc;
>
> following my gut, but since you've been thinking about submodule
> longer than I have, perhaps you can come up with a better name.
That makes sense. We do not need to mention 'submodule' as that
ought to be obvious from the file name already and 'update_clone'
is just enough to describe what we are doing.
Although there is already struct submodule_update_clone, which
would be the better candidate for 'update_clone' and this new
struct would be used as a helper in that struct, so update_clone_data
I'll think of adding a patch to rename that already existing struct
(submodule_update_clone -> update_clone) and renaming
this to update_clone_data.
>
> > @@ -1463,8 +1469,9 @@ struct submodule_update_clone {
> > const char *recursive_prefix;
> > const char *prefix;
> >
> > - /* Machine-readable status lines to be consumed by git-submodule.sh */
> > - struct string_list projectlines;
> > + /* to be consumed by git-submodule.sh */
> > + struct submodule_update_clone_information *submodule_lines;
> > + int submodule_lines_nr; int submodule_lines_alloc;
> >
> > /* If we want to stop as fast as possible and return an error */
> > unsigned quickstop : 1;
> > @@ -1478,7 +1485,7 @@ struct submodule_update_clone {
> > #define SUBMODULE_UPDATE_CLONE_INIT {0, MODULE_LIST_INIT, 0, \
> > SUBMODULE_UPDATE_STRATEGY_INIT, 0, 0, -1, STRING_LIST_INIT_DUP, 0, \
> > NULL, NULL, NULL, \
> > - STRING_LIST_INIT_DUP, 0, NULL, 0, 0}
> > + NULL, 0, 0, 0, NULL, 0, 0, 0}
>
> The structure definition and this macro definition are nearby, so it
> is not crucial, but its probably not a bad idea to switch to C99
> initializers for a thing like this to make it more readable, once
> the code around this area stabilizes back again sufficiently (IOW,
> let's not distract ourselves in the middle of adding a new feature
> like this one).
Are we still in the phase of "test balloon" or do we now accept
C99 initializers all over the code base?
But I agree to defer the conversion for now.
Thanks,
Stefan
next prev parent reply other threads:[~2018-07-16 23:56 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-07-12 19:47 [PATCH 0/6] git-submodule.sh: convert part of cmd_update to C Stefan Beller
2018-07-12 19:47 ` [PATCH 1/6] git-submodule.sh: align error reporting for update mode to use path Stefan Beller
2018-07-12 21:12 ` Junio C Hamano
2018-07-12 19:47 ` [PATCH 2/6] git-submodule.sh: rename unused variables Stefan Beller
2018-07-12 21:24 ` Junio C Hamano
2018-07-12 19:47 ` [PATCH 3/6] builtin/submodule--helper: factor out submodule updating Stefan Beller
2018-07-12 19:47 ` [PATCH 4/6] builtin/submodule--helper: store update_clone information in a struct Stefan Beller
2018-07-16 19:37 ` Junio C Hamano
2018-07-16 23:55 ` Stefan Beller [this message]
2018-07-12 19:47 ` [PATCH 5/6] builtin/submodule--helper: factor out method to update a single submodule Stefan Beller
2018-07-12 19:47 ` [PATCH 6/6] submodule--helper: introduce new update-module-mode helper Stefan Beller
2018-07-18 15:00 ` Derrick Stolee
2018-07-18 19:41 ` Stefan Beller
-- strict thread matches above, loose matches on Subject: below --
2018-07-18 19:48 [PATCH 0/6] Resend of origin/sb/submodule-update-in-c Stefan Beller
2018-07-18 19:48 ` [PATCH 4/6] builtin/submodule--helper: store update_clone information in a struct Stefan Beller
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
List information: http://vger.kernel.org/majordomo-info.html
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to='CAGZ79kaOy0pZJCob4d=66FQLaOu_q_BAJeFc94xkFa0SSqYigw@mail.gmail.com' \
--to=sbeller@google.com \
--cc=git@vger.kernel.org \
--cc=gitster@pobox.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
Code repositories for project(s) associated with this public inbox
https://80x24.org/mirrors/git.git
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).