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From: Junio C Hamano <gitster@pobox.com>
To: "Johannes Schindelin via GitGitGadget" <gitgitgadget@gmail.com>
Cc: git@vger.kernel.org, Jeff Hostetler <git@jeffhostetler.com>,
	Jeff King <peff@peff.net>,
	Johannes Schindelin <johannes.schindelin@gmx.de>
Subject: Re: [PATCH v5 5/9] built-in add -i: implement the main loop
Date: Fri, 08 Nov 2019 14:17:45 +0900	[thread overview]
Message-ID: <xmqq1rujndza.fsf@gitster-ct.c.googlers.com> (raw)
In-Reply-To: <25590fbbbee7efc34477bfea233684e93ee7fe60.1572869730.git.gitgitgadget@gmail.com> (Johannes Schindelin via GitGitGadget's message of "Mon, 04 Nov 2019 12:15:25 +0000")

"Johannes Schindelin via GitGitGadget" <gitgitgadget@gmail.com>
writes:

> From: Johannes Schindelin <johannes.schindelin@gmx.de>
>
> The reason why we did not start with the main loop to begin with is that
> it is the first user of `list_and_choose()`, which uses the `list()`
> function that we conveniently introduced for use by the `status`
> command.
>
> Apart from the "and choose" part, there are more differences between the
> way the `status` command calls the `list_and_choose()` function in the
> Perl version of `git add -i` compared to the other callers of said
> function. The most important ones:
>
> - The list is not only shown, but the user is also asked to make a
>   choice, possibly selecting multiple entries.

The list_and_choose() we have here shows and lets users choose and
returns the choice, but the above makes it sound as if it only shows
and the caller is responsible for asking the end-user input.  Is
this description outdated or something?

Perl allows us to return multiple choices, where it is a bit hard to
express it in C (perhaps because we are passing in an array of
structs to be shown as choices, list_and_choose could set a bit in
these structs to signal "this one, that one and that other one was
chosen", returning how many are chosen in total, to extend the
version here to bring it to feature-parity?).  So at this step, it
only lets the user one choice (or abort or ask for help).  Isn't the
lack of multiple choice the only difference this bullet item wants
to highlight?

> The Perl script `git-add--interactive.perl` mixed the purposes of the
> "list" and the "and choose" part into the same function. In the C
> version, we will keep them separate instead, calling the `list()`
> function from the `list_and_choose()` function.

That makes sense.

> +static ssize_t list_and_choose(struct add_i_state *s, struct string_list *items,
> +			       struct list_and_choose_options *opts)
> +{
> +	struct strbuf input = STRBUF_INIT;
> +	ssize_t res = LIST_AND_CHOOSE_ERROR;
> +
> +	for (;;) {
> +		char *p, *endp;

The scope of endp looks way too wide in this function, isn't it?
Even in the final state of the series, it only gets used to parse
an integer input using strtoul, inside a block of three lines.

Other than that, the code at this step was a pleasant read overall.

Thanks.

  reply	other threads:[~2019-11-08  5:17 UTC|newest]

Thread overview: 124+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-04-10 17:37 [PATCH 00/11] git add -i: add a rudimentary version in C (supporting only status and help so far) Johannes Schindelin via GitGitGadget
2019-04-10 17:37 ` [PATCH 01/11] Start to implement a built-in version of `git add --interactive` Johannes Schindelin via GitGitGadget
2019-04-18 14:31   ` Jeff Hostetler
2019-04-18 16:06     ` Jeff King
2019-04-30 23:40       ` Johannes Schindelin
2019-05-01  2:21         ` Jeff King
2019-05-13 11:14           ` Johannes Schindelin
2019-04-10 17:37 ` [PATCH 02/11] diff: export diffstat interface Daniel Ferreira via GitGitGadget
2019-04-10 17:37 ` [PATCH 03/11] built-in add -i: implement the `status` command Daniel Ferreira via GitGitGadget
2019-04-10 17:37 ` [PATCH 04/11] built-in add -i: refresh the index before running `status` Johannes Schindelin via GitGitGadget
2019-04-10 17:37 ` [PATCH 05/11] built-in add -i: color the header in the `status` command Johannes Schindelin via GitGitGadget
2019-04-10 17:37 ` [PATCH 06/11] built-in add -i: implement the main loop Johannes Schindelin via GitGitGadget
2019-04-18 16:49   ` Jeff Hostetler
2019-05-13 12:04     ` Johannes Schindelin
2019-04-10 17:37 ` [PATCH 07/11] Add a function to determine unique prefixes for a list of strings Slavica Djukic via GitGitGadget
2019-04-18 17:57   ` Jeff Hostetler
2019-05-13 12:48     ` Johannes Schindelin
2019-04-10 17:37 ` [PATCH 08/11] built-in add -i: show unique prefixes of the commands Slavica Djukic via GitGitGadget
2019-04-10 17:37 ` [PATCH 09/11] built-in add -i: support `?` (prompt help) Johannes Schindelin via GitGitGadget
2019-04-10 17:37 ` [PATCH 10/11] built-in add -i: use color in the main loop Slavica Djukic via GitGitGadget
2019-04-10 17:37 ` [PATCH 11/11] built-in add -i: implement the `help` command Johannes Schindelin via GitGitGadget
2019-05-13 17:27 ` [PATCH v2 00/11] git add -i: add a rudimentary version in C (supporting only status and help so far) Johannes Schindelin via GitGitGadget
2019-05-13 17:27   ` [PATCH v2 01/11] Start to implement a built-in version of `git add --interactive` Johannes Schindelin via GitGitGadget
2019-05-13 17:27   ` [PATCH v2 02/11] diff: export diffstat interface Daniel Ferreira via GitGitGadget
2019-05-13 17:27   ` [PATCH v2 03/11] built-in add -i: implement the `status` command Daniel Ferreira via GitGitGadget
2019-05-13 17:27   ` [PATCH v2 04/11] built-in add -i: refresh the index before running `status` Johannes Schindelin via GitGitGadget
2019-05-13 17:27   ` [PATCH v2 05/11] built-in add -i: color the header in the `status` command Johannes Schindelin via GitGitGadget
2019-05-13 17:27   ` [PATCH v2 06/11] built-in add -i: implement the main loop Johannes Schindelin via GitGitGadget
2019-05-13 17:27   ` [PATCH v2 07/11] Add a function to determine unique prefixes for a list of strings Slavica Djukic via GitGitGadget
2019-05-13 17:27   ` [PATCH v2 08/11] built-in add -i: show unique prefixes of the commands Slavica Djukic via GitGitGadget
2019-05-13 17:28   ` [PATCH v2 09/11] built-in add -i: support `?` (prompt help) Johannes Schindelin via GitGitGadget
2019-05-13 17:28   ` [PATCH v2 10/11] built-in add -i: use color in the main loop Slavica Djukic via GitGitGadget
2019-05-13 17:28   ` [PATCH v2 11/11] built-in add -i: implement the `help` command Johannes Schindelin via GitGitGadget
2019-07-16 14:58   ` [PATCH v3 00/11] git add -i: add a rudimentary version in C (supporting only status and help so far) Johannes Schindelin via GitGitGadget
2019-07-16 14:58     ` [PATCH v3 01/11] Start to implement a built-in version of `git add --interactive` Johannes Schindelin via GitGitGadget
2019-07-31 17:52       ` Junio C Hamano
2019-08-26 21:26         ` Johannes Schindelin
2019-08-27 22:25           ` Junio C Hamano
2019-08-28 15:06             ` Johannes Schindelin
2019-08-28 15:37               ` Junio C Hamano
2019-07-16 14:58     ` [PATCH v3 03/11] built-in add -i: implement the `status` command Daniel Ferreira via GitGitGadget
2019-07-31 18:12       ` Junio C Hamano
2019-08-27 10:04         ` Johannes Schindelin
2019-07-16 14:58     ` [PATCH v3 02/11] diff: export diffstat interface Daniel Ferreira via GitGitGadget
2019-07-31 17:59       ` Junio C Hamano
2019-08-27  9:22         ` Johannes Schindelin
2019-07-16 14:58     ` [PATCH v3 04/11] built-in add -i: refresh the index before running `status` Johannes Schindelin via GitGitGadget
2019-07-16 14:58     ` [PATCH v3 05/11] built-in add -i: color the header in the `status` command Johannes Schindelin via GitGitGadget
2019-07-16 14:58     ` [PATCH v3 06/11] built-in add -i: implement the main loop Johannes Schindelin via GitGitGadget
2019-07-31 18:14       ` Junio C Hamano
2019-07-16 14:58     ` [PATCH v3 08/11] built-in add -i: show unique prefixes of the commands Slavica Djukic via GitGitGadget
2019-07-16 14:58     ` [PATCH v3 07/11] Add a function to determine unique prefixes for a list of strings Slavica Djukic via GitGitGadget
2019-07-31 18:39       ` Junio C Hamano
2019-08-24 12:38       ` SZEDER Gábor
2019-08-27 12:14         ` Johannes Schindelin
2019-08-28 16:30           ` SZEDER Gábor
2019-08-28 16:34             ` [PATCH] [PoC] A simpler find_unique_prefixes() implementation SZEDER Gábor
2019-08-30 20:12               ` Johannes Schindelin
2019-07-16 14:58     ` [PATCH v3 09/11] built-in add -i: support `?` (prompt help) Johannes Schindelin via GitGitGadget
2019-07-16 14:58     ` [PATCH v3 10/11] built-in add -i: use color in the main loop Slavica Djukic via GitGitGadget
2019-07-16 14:58     ` [PATCH v3 11/11] built-in add -i: implement the `help` command Johannes Schindelin via GitGitGadget
2019-08-02 21:04       ` Junio C Hamano
2019-08-02 22:26         ` Jeff King
2019-07-16 18:38     ` [PATCH v3 00/11] git add -i: add a rudimentary version in C (supporting only status and help so far) Johannes Schindelin
2019-08-02 21:06       ` Junio C Hamano
2019-08-27 12:57     ` [PATCH v4 " Johannes Schindelin via GitGitGadget
2019-08-27 12:57       ` [PATCH v4 01/11] Start to implement a built-in version of `git add --interactive` Johannes Schindelin via GitGitGadget
2019-08-27 12:57       ` [PATCH v4 02/11] diff: export diffstat interface Daniel Ferreira via GitGitGadget
2019-08-27 12:57       ` [PATCH v4 03/11] built-in add -i: implement the `status` command Daniel Ferreira via GitGitGadget
2019-08-27 12:57       ` [PATCH v4 04/11] built-in add -i: refresh the index before running `status` Johannes Schindelin via GitGitGadget
2019-08-27 12:57       ` [PATCH v4 05/11] built-in add -i: color the header in the `status` command Johannes Schindelin via GitGitGadget
2019-08-27 12:57       ` [PATCH v4 06/11] built-in add -i: implement the main loop Johannes Schindelin via GitGitGadget
2019-08-27 12:57       ` [PATCH v4 07/11] Add a function to determine unique prefixes for a list of strings Slavica Djukic via GitGitGadget
2019-08-27 12:57       ` [PATCH v4 08/11] built-in add -i: show unique prefixes of the commands Slavica Djukic via GitGitGadget
2019-08-27 12:58       ` [PATCH v4 09/11] built-in add -i: support `?` (prompt help) Johannes Schindelin via GitGitGadget
2019-08-27 12:58       ` [PATCH v4 11/11] built-in add -i: implement the `help` command Johannes Schindelin via GitGitGadget
2019-08-27 12:58       ` [PATCH v4 10/11] built-in add -i: use color in the main loop Slavica Djukic via GitGitGadget
2019-11-04 12:15       ` [PATCH v5 0/9] git add -i: add a rudimentary version in C (supporting only status and help so far) Johannes Schindelin via GitGitGadget
2019-11-04 12:15         ` [PATCH v5 1/9] Start to implement a built-in version of `git add --interactive` Johannes Schindelin via GitGitGadget
2019-11-08  4:49           ` Junio C Hamano
2019-11-09 11:06             ` Johannes Schindelin
2019-11-10  7:18               ` Junio C Hamano
2019-11-11  9:15                 ` Johannes Schindelin
2019-11-11 12:09                   ` Junio C Hamano
2019-11-12 15:03                     ` Johannes Schindelin
2019-11-13  3:54                       ` Junio C Hamano
2019-11-13 12:30                         ` Johannes Schindelin
2019-11-13 14:01                           ` Junio C Hamano
2019-11-04 12:15         ` [PATCH v5 2/9] diff: export diffstat interface Daniel Ferreira via GitGitGadget
2019-11-08  4:56           ` Junio C Hamano
2019-11-04 12:15         ` [PATCH v5 3/9] built-in add -i: implement the `status` command Daniel Ferreira via GitGitGadget
2019-11-08  5:01           ` Junio C Hamano
2019-11-04 12:15         ` [PATCH v5 4/9] built-in add -i: color the header in " Slavica Đukić via GitGitGadget
2019-11-04 12:15         ` [PATCH v5 5/9] built-in add -i: implement the main loop Johannes Schindelin via GitGitGadget
2019-11-08  5:17           ` Junio C Hamano [this message]
2019-11-09 11:21             ` Johannes Schindelin
2019-11-04 12:15         ` [PATCH v5 6/9] built-in add -i: show unique prefixes of the commands Johannes Schindelin via GitGitGadget
2019-11-04 12:15         ` [PATCH v5 7/9] built-in add -i: support `?` (prompt help) Johannes Schindelin via GitGitGadget
2019-11-04 12:15         ` [PATCH v5 8/9] built-in add -i: use color in the main loop Slavica Đukić via GitGitGadget
2019-11-04 12:15         ` [PATCH v5 9/9] built-in add -i: implement the `help` command Slavica Đukić via GitGitGadget
2019-11-13 12:40         ` [PATCH v6 0/9] git add -i: add a rudimentary version in C (supporting only status and help so far) Johannes Schindelin via GitGitGadget
2019-11-13 12:40           ` [PATCH v6 1/9] Start to implement a built-in version of `git add --interactive` Johannes Schindelin via GitGitGadget
2019-11-14  2:15             ` Junio C Hamano
2019-11-14 15:07               ` Johannes Schindelin
2019-11-15  4:35                 ` Junio C Hamano
2019-11-13 12:40           ` [PATCH v6 2/9] diff: export diffstat interface Daniel Ferreira via GitGitGadget
2019-11-13 12:40           ` [PATCH v6 3/9] built-in add -i: implement the `status` command Daniel Ferreira via GitGitGadget
2019-11-13 12:41           ` [PATCH v6 4/9] built-in add -i: color the header in " Slavica Đukić via GitGitGadget
2019-11-13 12:41           ` [PATCH v6 5/9] built-in add -i: implement the main loop Johannes Schindelin via GitGitGadget
2019-11-13 12:41           ` [PATCH v6 6/9] built-in add -i: show unique prefixes of the commands Johannes Schindelin via GitGitGadget
2019-11-13 12:41           ` [PATCH v6 7/9] built-in add -i: support `?` (prompt help) Johannes Schindelin via GitGitGadget
2019-11-13 12:41           ` [PATCH v6 8/9] built-in add -i: use color in the main loop Slavica Đukić via GitGitGadget
2019-11-13 12:41           ` [PATCH v6 9/9] built-in add -i: implement the `help` command Slavica Đukić via GitGitGadget
2019-11-13 12:46           ` [PATCH v6 0/9] git add -i: add a rudimentary version in C (supporting only status and help so far) Johannes Schindelin
2019-11-15 11:11           ` [PATCH v7 " Johannes Schindelin via GitGitGadget
2019-11-15 11:11             ` [PATCH v7 1/9] Start to implement a built-in version of `git add --interactive` Johannes Schindelin via GitGitGadget
2019-11-15 11:11             ` [PATCH v7 2/9] diff: export diffstat interface Daniel Ferreira via GitGitGadget
2019-11-15 11:11             ` [PATCH v7 3/9] built-in add -i: implement the `status` command Daniel Ferreira via GitGitGadget
2019-11-15 11:11             ` [PATCH v7 4/9] built-in add -i: color the header in " Slavica Đukić via GitGitGadget
2019-11-15 11:11             ` [PATCH v7 5/9] built-in add -i: implement the main loop Johannes Schindelin via GitGitGadget
2019-11-15 11:11             ` [PATCH v7 6/9] built-in add -i: show unique prefixes of the commands Johannes Schindelin via GitGitGadget
2019-11-15 11:11             ` [PATCH v7 7/9] built-in add -i: support `?` (prompt help) Johannes Schindelin via GitGitGadget
2019-11-15 11:11             ` [PATCH v7 8/9] built-in add -i: use color in the main loop Slavica Đukić via GitGitGadget
2019-11-15 11:11             ` [PATCH v7 9/9] built-in add -i: implement the `help` command Slavica Đukić via GitGitGadget

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