Your patch is clearly better than mine. I'll let you take over this bug.
Thanks for taking a deeper look into this,
Albert Yale
On Mon, Jan 23, 2012 at 12:52 PM, Thomas Rast <trast@xxxxxxxxxxxxxxx> wrote:
> From: Albert Yale <surfingalbert@xxxxxxxxx>
>
> In threaded mode, git-grep emits file breaks (enabled with context, -W
> and --break) into the accumulation buffers even if they are not
> required. The output collection thread then uses skip_first_line to
> skip the first such line in the output, which would otherwise be at
> the very top.
>
> This is wrong when the user also specified -l/-L/-c, in which case
> every line is relevant. While arguably giving these options together
> doesn't make any sense, git-grep has always quietly accepted it. So
> do not skip anything in these cases.
>
> Signed-off-by: Albert Yale <surfingalbert@xxxxxxxxx>
> Signed-off-by: Thomas Rast <trast@xxxxxxxxxxxxxxx>
> ---
>
>> Reviewed-by: Thomas Rast <trast@xxxxxxxxxxxxxxx>
>
> Please don't. I didn't actually read the patch or look at the code,
> or say so, and you're claiming I did. I was working purely from the
> commit message.
>
>> As for creating a test, I'm unfamiliar with the testing procedure for
>> git-core. A "how to" in the "Documentation" folder would be very
>> useful in that regard.
>
> Well, there's t/README.
>
>
> Here's a patch that also does -c and has tests. Placing them was more
> finicky than I hoped; the list of files in the repo varies wildly
> across the test set. It also exploits knowledge that git-ls-files
> order is the same as 'git grep -l' order, which might not be
> appropriate.
>
>
> builtin/grep.c | 6 ++++--
> t/t7810-grep.sh | 22 ++++++++++++++++++++++
> 2 files changed, 26 insertions(+), 2 deletions(-)
>
> diff --git a/builtin/grep.c b/builtin/grep.c
> index 9ce064a..1120b9f 100644
> --- a/builtin/grep.c
> +++ b/builtin/grep.c
> @@ -1034,8 +1034,10 @@ int cmd_grep(int argc, const char **argv, const char *prefix)
>
> #ifndef NO_PTHREADS
> if (use_threads) {
> - if (opt.pre_context || opt.post_context || opt.file_break ||
> - opt.funcbody)
> + if (!(opt.name_only || opt.unmatch_name_only ||
> + opt.count)
> + && (opt.pre_context || opt.post_context ||
> + opt.file_break || opt.funcbody))
> skip_first_line = 1;
> start_threads(&opt);
> }
> diff --git a/t/t7810-grep.sh b/t/t7810-grep.sh
> index 7ba5b16..75f4716 100755
> --- a/t/t7810-grep.sh
> +++ b/t/t7810-grep.sh
> @@ -246,6 +246,28 @@ do
> done
>
> cat >expected <<EOF
> +file
> +EOF
> +test_expect_success 'grep -l -C' '
> + git grep -l -C1 foo >actual &&
> + test_cmp expected actual
> +'
> +
> +cat >expected <<EOF
> +file:5
> +EOF
> +test_expect_success 'grep -l -C' '
> + git grep -c -C1 foo >actual &&
> + test_cmp expected actual
> +'
> +
> +test_expect_success 'grep -L -C' '
> + git ls-files >expected &&
> + git grep -L -C1 nonexistent_string >actual &&
> + test_cmp expected actual
> +'
> +
> +cat >expected <<EOF
> file:foo mmap bar_mmap
> EOF
>
> --
> 1.7.9.rc2.215.gd9e83
>
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