From: Gerrit Pape <pape@smarden.org>
Date: Fri, 06 Jul 2007 14:42:27 GMT
Subject: [PATCH] git-commit: don't add multiple Signed-off-by: from the same identity
Message-ID: <20070706144227.11736.qmail@046ba2bc1a0185.315fe32.mid.smarden.org>

If requested to signoff a commit, don't add another Signed-off-by: line
to the commit message if the exact same line is already there.

This was noticed and requested by Josh Triplett through
 http://bugs.debian.org/430851

Signed-off-by: Gerrit Pape <pape@smarden.org>
---
 git-commit.sh |   20 +++++++++++---------
 1 files changed, 11 insertions(+), 9 deletions(-)

diff --git a/git-commit.sh b/git-commit.sh
index f866f95..7a7d19a 100755
--- a/git-commit.sh
+++ b/git-commit.sh
@@ -458,16 +458,18 @@ fi | git stripspace >"$GIT_DIR"/COMMIT_EDITMSG
 
 case "$signoff" in
 t)
-	need_blank_before_signoff=
+	sign=$(git-var GIT_COMMITTER_IDENT | sed -e '
+		s/>.*/>/
+		s/^/Signed-off-by: /
+		')
+	blank_before_signoff=
 	tail -n 1 "$GIT_DIR"/COMMIT_EDITMSG |
-	grep 'Signed-off-by:' >/dev/null || need_blank_before_signoff=yes
-	{
-		test -z "$need_blank_before_signoff" || echo
-		git-var GIT_COMMITTER_IDENT | sed -e '
-			s/>.*/>/
-			s/^/Signed-off-by: /
-		'
-	} >>"$GIT_DIR"/COMMIT_EDITMSG
+	grep 'Signed-off-by:' >/dev/null || blank_before_signoff='
+'
+	tail -n 1 "$GIT_DIR"/COMMIT_EDITMSG |
+	grep "$sign"$ >/dev/null ||
+	printf '%s%s\n' "$blank_before_signoff" "$sign" \
+		>>"$GIT_DIR"/COMMIT_EDITMSG
 	;;
 esac
 
-- 
1.5.2.1