Introduce --pretty=oneline format.

This introduces --pretty=oneline to git-rev-tree and
git-rev-list commands to show only the first line of the commit
message, without frills. 

Signed-off-by: Junio C Hamano <junkio@cox.net>

1 files changed, 1 insertions, 0 deletions

diff --git a/commit.h b/commit.h
index c24ab21061..5d179d4dc8 100644
--- a/commit.h
+++ b/commit.h
@@ -40,6 +40,7 @@ enum cmit_fmt {
 	CMIT_FMT_DEFAULT = CMIT_FMT_MEDIUM,
 	CMIT_FMT_SHORT,
 	CMIT_FMT_FULL,
+	CMIT_FMT_ONELINE,
 };
 
 extern enum cmit_fmt get_commit_format(const char *arg);