--- /dev/null
+# Copyright (c) 2018 Open Network Automation Platform and contributors
+#
+# 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.
+
+# Create a list of submodules used to build documentation
+# Usage: sh smsummary.sh output_file
+#
+
+echo "************************************************************************************" > $1
+echo "* Submodule branches used to build this version of the documentation. *" >> $1
+echo "************************************************************************************" >> $1
+
+git submodule foreach git for-each-ref \
+ --format='%(committerdate:iso8601) %(objectname) %(HEAD) %(refname) %(subject)' \
+ --sort -committerdate refs/heads/ | \
+ sed -e 's:^: :' -e 's: Entering .docs/submodules/::' -e 's:.git.$::' -e 's:refs/heads/::' >> $1