grep: add --heading

With --heading, the filename is printed once before matches from that
file instead of at the start of each line, giving more screen space to
the actual search results.

This option is taken from ack (http://betterthangrep.com/).  And now
git grep can dress up like it:

	$ git config alias.ack "grep --break --heading --line-number"

	$ git ack -e --heading
	Documentation/git-grep.txt
	154:--heading::

	t/t7810-grep.sh
	785:test_expect_success 'grep --heading' '
	786:    git grep --heading -e char -e lo_w hello.c hello_world >actual &&
	808:    git grep --break --heading -n --color \

Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
René Scharfe
2011-06-05 17:24:36 +02:00
committed by Junio C Hamano
parent a8f0e7649e
commit 1d84f72ef1
5 changed files with 49 additions and 1 deletions

View File

@ -824,6 +824,8 @@ int cmd_grep(int argc, const char **argv, const char *prefix)
OPT__COLOR(&opt.color, "highlight matches"),
OPT_BOOLEAN(0, "break", &opt.file_break,
"print empty line between matches from different files"),
OPT_BOOLEAN(0, "heading", &opt.heading,
"show filename only once above matches from same file"),
OPT_GROUP(""),
OPT_CALLBACK('C', NULL, &opt, "n",
"show <n> context lines before and after matches",