From: Gerrit Pape <pape@smarden.org>
Date: Fri, 6 Jul 2007 14:42:27 +0000 (+0000)
Subject: git-commit: don't add multiple Signed-off-by: from the same identity
X-Git-Tag: v1.5.3-rc1~46
X-Git-Url: https://git.tokkee.org/?a=commitdiff_plain;h=a7342913e21a96597f38ce0b48e3093c9739df1f;p=git.git

git-commit: don't add multiple Signed-off-by: from the same identity

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>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
---

diff --git a/git-commit.sh b/git-commit.sh
index 9106a743c..f3cd8ee97 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