[PATCH 0/2] builtin/grep.c: teach '-o', '--only-matching'

Hi,

Attached is a series to teach 'git-grep(1)' how to respond to '--only-matching' (a-la GNU grep(1)'s --only-matching, including an '-o' synonym) to only print the matching component(s) of a line. It is based on v4 of tb/grep-colno, which was sent in [1].

This was suggested to me by Ævar in [2].

This change was fairly straightforward, as Ævar suggests in [3], with the only complication being that we must print a line header multiple times when there are >1 matches per-line. This requirement pushes the implementation towards the extraction of a show_line_header() function, and some minor changes in show_line() to reflect.

Thank you in advance for your review.

Thanks, Taylor

[1]: https://public-inbox.org/git/cover.1525488108.git.me@ttaylorr.com [2]: https://public-inbox.org/git/874lk2e4he.fsf@evledraar.gmail.com [3]: https://public-inbox.org/git/87in9ucsbb.fsf@evledraar.gmail.com

Taylor Blau (2):
  grep.c: extract show_line_header()
  builtin/grep.c: teach '-o', '--only-matching' to 'git-grep'

 Documentation/git-grep.txt |  6 +++-
 builtin/grep.c             |  1 +
 grep.c                     | 67 +++++++++++++++++++++++++-------------
 grep.h                     |  1 +
 t/t7810-grep.sh            | 33 +++++++++++++++++++
 5 files changed, 85 insertions(+), 23 deletions(-)

-- 2.17.0