Re: [PATCH v3 0/2] grep.c: teach --only-matching to 'git-grep(1)'

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On Thu, Jul 05, 2018 at 10:21:11AM -0400, Jeff King wrote:
> On Tue, Jul 03, 2018 at 04:51:52PM -0500, Taylor Blau wrote:
>
> > diff --git a/Documentation/git-grep.txt b/Documentation/git-grep.txt
> > index 0de3493b80..be13fc3253 100644
> > --- a/Documentation/git-grep.txt
> > +++ b/Documentation/git-grep.txt
> > @@ -17,7 +17,7 @@ SYNOPSIS
> >  	   [-l | --files-with-matches] [-L | --files-without-match]
> >  	   [(-O | --open-files-in-pager) [<pager>]]
> >  	   [-z | --null]
> > -	   [-c | --count] [--all-match] [-q | --quiet]
> > +	   [ -o | --only-matching ] [-c | --count] [--all-match] [-q | --quiet]
> >  	   [--max-depth <depth>]
> >  	   [--color[=<when>] | --no-color]
> >  	   [--break] [--heading] [-p | --show-function]
> > @@ -201,6 +201,10 @@ providing this option will cause it to die.
> >  	Output \0 instead of the character that normally follows a
> >  	file name.
> >
> > +-o::
> > +--only-matching::
> > +  Output only the matching part of the lines.
> > +
>
> Putting myself into the shoes of a naive reader, I have to wonder what
> happens when there are multiple matching parts on the same line. I know
> the answer from your commit message, but maybe that should be covered
> here? Maybe:
>
>   Output only the matching part of the lines. If there are multiple
>   matching parts, each is output on a separate line.

I think that this might be clear enough on its own, especially since
this is the same as BSD grep on my machine. I think that part_s_ of a
line indicates that behavior, but perhaps not. On GNU grep, this is:

  Print only the matched (non-empty) parts of a matching line, with each
  such part on a separate output line.

I'm happy to pick either and re-send this patch (2/2) again, if it
wouldn't be too much to juggle. Otherwise, I can re-roll to v4.


Thanks,
Taylor



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