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From: Junio C Hamano <gitster@pobox.com>
To: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Cc: git@vger.kernel.org
Subject: Re: [PATCH/RFC] completion: complete all possible -no-<options>
Date: Wed, 18 Apr 2018 12:43:04 +0900
Message-ID: <xmqq604pji2f.fsf@gitster-ct.c.googlers.com> (raw)
In-Reply-To: <20180417181300.23683-1-pclouds@gmail.com>

Nguyễn Thái Ngọc Duy  <pclouds@gmail.com> writes:

> So the other half of this patch, the part in git-completion.bash, is
> to uncomplete --no- options. When you do "git checkout --<tab>",
> instead of displaying all --no- options, this patch simply displays
> one item: the --no- prefix. If you do "git checkout --no-<tab>" then
> all negative options are displayed. This helps reduce completable
> options quite efficiently.

Clever.

> Of course life is not that simple, we do have --no- options by default
> sometimes (taking priority over the positive form), e.g. "git clone
> --no-checkout". Collapsing all --no-options into --no- would be a
> regression.
>
> To avoid it, the order of options --git-completion-helper returns does
> matter. The first 4 negative options are not collapsed. Only options
> after the 4th are. Extra --no- options are always printed at the end,
> after all the --no- defined in struct option, this kinda works. Not
> pretty but works.

So, the earlier mention of "clone --no-checkout" sounded about not
losing this historical practice, but (desirabilty of magic number 4
aside) this "show first handful of --no-foo" feature is not about
historical practice but is forward looking, in the sense that you do
not mark "important" negated options in the source, which would be a
way to handle the histrical "clone --no-checkout", but let the
machinery mechanically choose among --no-foo (with the stupid choice
criterion "first four are shown").  That allows other commands to
have many --no-foo form without overwhelming the choices, but I am
not sure if it is much better than a possible alternative of only
showing --no-foo for more "important" foo's when show_gitcomp() is
asked to list all of things.  It would certainly be a more involved
solution, that might require an update to the way how the choices
are precomputed (you'd end up having to keep a separate "use this
list when completing '--no-'" in addition to the normal list).

In any case, count this as a vote to support an update in this
direction.  A quite promising work ;-)

Thanks.

  reply index

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-04-17 18:13 Nguyễn Thái Ngọc Duy
2018-04-18  3:43 ` Junio C Hamano [this message]
2018-04-18 15:08   ` Duy Nguyen
2018-04-23  5:36 ` Eric Sunshine
2018-05-08 15:24   ` Duy Nguyen
2018-05-08 16:39     ` Stefan Beller
2018-05-09  3:20     ` Aaron Schrab
2018-05-14 17:14       ` Duy Nguyen
2018-05-14  3:33     ` Eric Sunshine
2018-05-14 16:39       ` Duy Nguyen
2018-05-14 17:03     ` Andreas Heiduk
2018-05-14 17:26       ` Duy Nguyen
2018-05-14 19:58         ` Andreas Heiduk
2018-05-27  8:38 ` [PATCH v2 0/3] " Nguyễn Thái Ngọc Duy
2018-05-27  8:38   ` [PATCH v2 1/3] parse-options: option to let --git-completion-helper show negative form Nguyễn Thái Ngọc Duy
2018-05-27  8:38   ` [PATCH v2 2/3] completion: suppress some -no- options Nguyễn Thái Ngọc Duy
2018-05-27  8:38   ` [PATCH v2 3/3] completion: collapse extra --no-.. options Nguyễn Thái Ngọc Duy
2018-05-29 18:48     ` Stefan Beller
2018-05-29 19:04       ` Duy Nguyen
2018-06-06  9:41   ` [PATCH v3 0/3] ompletion: complete all possible -no-<options> Nguyễn Thái Ngọc Duy
2018-06-06  9:41     ` [PATCH v3 1/3] parse-options: option to let --git-completion-helper show negative form Nguyễn Thái Ngọc Duy
2018-06-06  9:41     ` [PATCH v3 2/3] completion: suppress some -no- options Nguyễn Thái Ngọc Duy
2018-06-06  9:41     ` [PATCH v3 3/3] completion: collapse extra --no-.. options Nguyễn Thái Ngọc Duy

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