Re: [PATCH v2 04/10] sequencer.c: recognize "(cherry picked from ..." as part of s-o-b footer

[Jonathan Nieder <jrnieder@gmail.com>]

Hi,

Brandon Casey wrote:

> Let's detect "(cherry picked from...)" as part of the footer so that we
> will produce this:
>
>    Signed-off-by: A U Thor <author@example.com>
>    (cherry picked from da39a3ee5e6b4b0d3255bfef95601890afd80709)
>    Signed-off-by: C O Mmitter <committer@example.com>
>
> instead of this:
>
>    Signed-off-by: A U Thor <author@example.com>
>    (cherry picked from da39a3ee5e6b4b0d3255bfef95601890afd80709)
>
>    Signed-off-by: C O Mmitter <committer@example.com>

My last review was based on a misunderstanding of
ends_rfc2822_footer().  This time I can unreservedly say I like this.

[...]
> --- a/sequencer.c
> +++ b/sequencer.c
> @@ -18,6 +18,7 @@
>  #define GIT_REFLOG_ACTION "GIT_REFLOG_ACTION"
>  
>  const char sign_off_header[] = "Signed-off-by: ";
> +static const char cherry_picked_prefix[] = "(cherry picked from commit ";

The static/nonstatic mismatch looks strange.  Not about this patch,
but probably rest_is_empty() from builtin-commit.c should move here
some day.

[...]
> @@ -1021,11 +1022,36 @@ int sequencer_pick_revisions(struct replay_opts *opts)
[...]
> +static int is_cherry_picked_from_line(const char *buf, int len)
> +{
> +	/*
> +	 * We only care that it looks roughly like (cherry picked from ...)
> +	 */
> +	return !prefixcmp(buf, cherry_picked_prefix) &&
> +		(buf[len - 1] == ')' ||
> +		 (buf[len - 1] == '\n' && buf[len - 2] == ')'));

These two cases are based on whether the commit message ended with
a '(cherry picked from' with no trailing newline, I guess?

I wonder if switching the convention for 'k' would make this simpler:

	const char *line, *eol;

	line = buf + i;
	eol = memchr(buf, '\n', len - i);
	if (!eol)
		eol = buf + len;

	if (!is_rfc2822_field(line, eol - line) &&
	    !is_cherry_picked_from_line(line, eol - line))
		return 0;

I notice you just sent a new version of the series.  I'll try this out
on top of that.

Thanks,
Jonathan