Re: [PATCH 2/2] built-in add -i: accept open-ended ranges again

From: Junio C Hamano <gitster@pobox.com>
To: "Johannes Schindelin via GitGitGadget" <gitgitgadget@gmail.com>
Cc: git@vger.kernel.org, Johannes Schindelin <johannes.schindelin@gmx.de>
Subject: Re: [PATCH 2/2] built-in add -i: accept open-ended ranges again
Date: Thu, 16 Jan 2020 14:16:57 -0800	[thread overview]
Message-ID: <xmqqv9pbf3mu.fsf@gitster-ct.c.googlers.com> (raw)
In-Reply-To: <7e4bf4bbbcd8c81a19d690aee379042e47246947.1579163587.git.gitgitgadget@gmail.com> (Johannes Schindelin via GitGitGadget's message of "Thu, 16 Jan 2020 08:33:07 +0000")

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

> From: Johannes Schindelin <johannes.schindelin@gmx.de>
>
> The interactive `add` command allows selecting multiple files for some
> of its sub-commands, via unique prefixes, indices or index ranges.
>
> When re-implementing `git add -i` in C, we even added a code comment
> talking about ranges with a missing end index, such as `2-`, but the
> code did not actually accept those, as pointed out in
> https://github.com/git-for-windows/git/issues/2466#issuecomment-574142760.
>
> Let's fix this, and add a test case to verify that this stays fixed
> forever.
>
> Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
> ---
>  add-interactive.c          | 5 ++++-
>  t/t3701-add-interactive.sh | 9 +++++++++
>  2 files changed, 13 insertions(+), 1 deletion(-)
>
> diff --git a/add-interactive.c b/add-interactive.c
> index 14d4688c26..396066e724 100644
> --- a/add-interactive.c
> +++ b/add-interactive.c
> @@ -328,7 +328,10 @@ static ssize_t list_and_choose(struct add_i_state *s,
>  				if (endp == p + sep)
>  					to = from + 1;
>  				else if (*endp == '-') {
> -					to = strtoul(++endp, &endp, 10);
> +					if (isdigit(*(++endp)))
> +						to = strtoul(endp, &endp, 10);
> +					else
> +						to = items->items.nr;

Good.  We do not allow "everything up to N" with "-N", so covering
"N and everything after" with "N-" is sufficient.

> diff --git a/t/t3701-add-interactive.sh b/t/t3701-add-interactive.sh
> index d4f9386621..b02fe73631 100755
> --- a/t/t3701-add-interactive.sh
> +++ b/t/t3701-add-interactive.sh
> @@ -57,6 +57,15 @@ test_expect_success 'revert works (initial)' '
>  	! grep . output
>  '
>  
> +test_expect_success 'add untracked (multiple)' '
> +	test_when_finished "git reset && rm [1-9]" &&
> +	touch $(test_seq 9) &&
> +	test_write_lines a "2-5 8-" | git add -i -- [1-9] &&
> +	test_write_lines 2 3 4 5 8 9 >expected &&
> +	git ls-files [1-9] >output &&
> +	test_cmp expected output
> +'
> +
>  test_expect_success 'setup (commit)' '
>  	echo baseline >file &&
>  	git add file &&