Re: [PATCH v2] line-log: suppress diff output with "-s"

> When "-L" is in use, we ignore any diff output format that the user
> provides to us, and just always print a patch (with extra context lines
> covering the whole area of interest). It's not entirely clear what we
> should do with all formats (e.g., should "--stat" show just the diffstat
> of the touched lines, or the stat for the whole file?).
> 
> But "-s" is pretty clear: the user probably wants to see just the
> commits that touched those lines, without any diff at all. Let's at
> least make that work.

> 
> Signed-off-by: Jeff King <peff@peff.net>
> ---
> This is a repost from the thread at:
> 
>   https://public-inbox.org/git/CAEkQehdFu5zM4AY3ihN0pn1aCNEomY0WV07pryfAB45JN-tDDA@mail.gmail.com/
> 
>  line-log.c          | 6 ++++--
>  t/t4211-line-log.sh | 7 +++++++
>  2 files changed, 11 insertions(+), 2 deletions(-)
> 
> diff --git a/line-log.c b/line-log.c
> index 24e21731c4..59248e37cc 100644
> --- a/line-log.c
> +++ b/line-log.c
> @@ -1103,10 +1103,12 @@ static int process_all_files(struct line_log_data **range_out,
>  
>  int line_log_print(struct rev_info *rev, struct commit *commit)
>  {
> -	struct line_log_data *range = lookup_line_range(rev, commit);
>  
>  	show_log(rev);
> -	dump_diff_hacky(rev, range);
> +	if (!(rev->diffopt.output_format & DIFF_FORMAT_NO_OUTPUT)) {
> +		struct line_log_data *range = lookup_line_range(rev, commit);
> +		dump_diff_hacky(rev, range);
> +	}
>  	return 1;
>  }
>  
> diff --git a/t/t4211-line-log.sh b/t/t4211-line-log.sh
> index bd5fe4d148..c9f2036f68 100755
> --- a/t/t4211-line-log.sh
> +++ b/t/t4211-line-log.sh
> @@ -115,4 +115,11 @@ test_expect_success 'range_set_union' '
>  	git log $(for x in $(test_seq 200); do echo -L $((2*x)),+1:c.c; done)
>  '
>  
> +test_expect_success '-s shows only line-log commits' '
> +	git log --format="commit %s" -L1,24:b.c >expect.raw &&
> +	grep ^commit expect.raw >expect &&
> +	git log --format="commit %s" -L1,24:b.c -s >actual &&
> +	test_cmp expect actual
> +'
> +
>  test_done
> -- 
> 2.21.0.787.g929e938557
>