Re: [PATCH v2 6/7] string-list: optionally omit empty string pieces in string_list_split*()

From: Patrick Steinhardt <ps@pks.im>
Date: Aug 1, 2025, 08:47 UTC
Message-ID: <aIx_KAhKhGedQ0mV@pks.im>
In-Reply-To: <20250731224607.3942417-7-gitster@pobox.com>

On Thu, Jul 31, 2025 at 03:46:05PM -0700, Junio C Hamano wrote:

> Teach the unified split_string() machinery a new flag bit,
> STRING_LIST_SPLIT_NONEMPTY, to cause empty split pieces omitted from

s/omitted/to be &/

Show 19 quoted lines

> the resulting string list.
> 
> Signed-off-by: Junio C Hamano <gitster@pobox.com>
> ---
>  string-list.c                |  3 +++
>  string-list.h                |  3 +++
>  t/unit-tests/u-string-list.c | 15 +++++++++++++++
>  3 files changed, 21 insertions(+)
> 
> diff --git a/string-list.c b/string-list.c
> index 86a309f8fb..343cf1ca90 100644
> --- a/string-list.c
> +++ b/string-list.c
> @@ -294,6 +294,9 @@ static int append_one(struct string_list *list,
>  				break;
>  	}
>  
> +	if ((flags & STRING_LIST_SPLIT_NONEMPTY) && (end <= p))
> +		return 0;

Okay, this is where the return value of `append_one()` starts to make sense.

The condition for `end <= p` is probably overly defensive, as it shouldn't ever happen that `end < p`. We could make that a `BUG()`, but I'm not sure that's really worth it.

Patrick