+#!/bin/bash
+# This file is part of NIT ( http://www.nitlanguage.org ).
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Check missing signed-off-by in commits
+
+if test "$#" -lt 2; then
+ echo "Usage: checksignedoffby from to"
+ echo ""
+ exit
+fi
+
+from=$1
+to=$2
+
+err=0
+
+for ref in `git rev-list --no-merges "$from".."$to"`; do
+ # What is the expected?
+ sig=`git --no-pager show -s --format='Signed-off-by: %an <%ae>' $ref`
+ # Do we found some signed-off-by?
+ git --no-pager show -s --format="%b" $ref | grep "^Signed-off-by:" > check_signedoff_list.out || {
+ git --no-pager show -s --oneline $ref
+ echo "Missing $sig"
+ err=1
+ continue
+ }
+ # Do we found the expected thing?
+ cat check_signedoff_list.out | grep -q "^$sig\$" && continue
+ git --no-pager show -s --oneline $ref
+ echo "Bad or missing $sig; got:"
+ cat check_signedoff_list.out
+ err=1
+done
+
+rm check_signedoff_list.out 2> /dev/null
+
+exit $err