Re: [PATCH] Added ability to scip patch hunk with an empty filename.

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Evgen Druzhynin <evgen.druzhynin@xxxxxxxxx> writes:

This space is for you to explain why it is a good idea to do this
change.  What problem does it solve, how often does that problem
appear, what other workarounds exist if any and why they are not
satisfactory, etc, etc?

> ---

Above this line, we would want you to sign-off your patch,
certifying that you read DCO (see Documentation/SubmittingPatches)
and you wrote it or otherwise have the right to pass it on as an
open-source patch.

>  builtin/apply.c | 16 +++++-----------
>  po/bg.po        | 15 ---------------
>  po/ca.po        | 15 ---------------
>  po/de.po        | 15 ---------------
>  po/fr.po        | 15 ---------------
>  po/git.pot      | 11 -----------
>  po/it.po        | 11 -----------
>  po/pt_PT.po     |  7 -------
>  po/ru.po        | 12 ------------
>  po/sv.po        | 16 ----------------
>  po/vi.po        | 12 ------------
>  po/zh_CN.po     | 11 -----------

We do not want anybody who is not doing the i18n/l10n to touch any
po/* files.  The i18n/l10n team will adjust their translations
accordingly when the code changes.

>  12 files changed, 5 insertions(+), 151 deletions(-)

> diff --git a/builtin/apply.c b/builtin/apply.c
> index 54aba4e..e4481b4 100644
> --- a/builtin/apply.c
> +++ b/builtin/apply.c
> @@ -1488,17 +1488,11 @@ static int find_header(const char *line, unsigned long size, int *hdrsize, struc
>  			int git_hdr_len = parse_git_header(line, len, size, patch);
>  			if (git_hdr_len <= len)
>  				continue;
> -			if (!patch->old_name && !patch->new_name) {
> -				if (!patch->def_name)
> -					die(Q_("git diff header lacks filename information when removing "
> -					       "%d leading pathname component (line %d)",
> -					       "git diff header lacks filename information when removing "
> -					       "%d leading pathname components (line %d)",
> -					       p_value),
> -					    p_value, linenr);
> -				patch->old_name = xstrdup(patch->def_name);
> -				patch->new_name = xstrdup(patch->def_name);
> -			}
> +
> +			/* pass this hunk if the filename length is zero */
> +			if (!patch->old_name && !patch->new_name) 
> +				return -1;				

Please explain why this is a good idea.

This can happen only when (1) the user gave too large a number to
the -p option or (2) the original patch was corrupt.  In either
case, we would want to stop and give the user a chance to correct
it, either by specifying the correct -p number, or editing the
corrupt patch to state the right path the patch applies to.
Silently dropping the patch is never a good thing to do, is it?

Thanks.
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