+# This function will determine the impacted generic scenario by processing the
+# change and using diff to see what changed.
+# It currently sets the scenario to os-nosdn-nofeature.
+function determine_generic_scenario() {
+ echo "Processing $GERRIT_PROJECT $GERRIT_REFSPEC"
+
+ # set the default scenario
+ DEPLOY_SCENARIO="os-nosdn-nofeature"
+}
+
+# This function determines the impacted external scenario by processing the Gerrit
+# change and using diff to see what changed. If changed files belong to a scenario
+# its name gets recorded for deploying and testing the right scenario.
+#
+# Pattern
+# <project-repo>/scenarios/<scenario>/<impacted files>: <scenario>
+function determine_external_scenario() {
+ echo "Processing $GERRIT_PROJECT $GERRIT_REFSPEC"
+
+ # remove the clone that is done via jenkins and place releng-xci there so the
+ # things continue functioning properly
+ cd $HOME && /bin/rm -rf $WORKSPACE
+ git clone -q https://gerrit.opnfv.org/gerrit/releng-xci $WORKSPACE && cd $WORKSPACE
+
+ # fix the permissions so ssh doesn't complain due to having world-readable keyfiles
+ chmod -R go-rwx $WORKSPACE/xci/scripts/vm
+
+ # clone the project repo and fetch the patchset to process for further processing
+ git clone -q https://gerrit.opnfv.org/gerrit/$GERRIT_PROJECT $WORK_DIRECTORY/$GERRIT_PROJECT
+ cd $WORK_DIRECTORY/$GERRIT_PROJECT
+ git fetch -q https://gerrit.opnfv.org/gerrit/$GERRIT_PROJECT $GERRIT_REFSPEC && git checkout -q FETCH_HEAD
+
+ # process the diff to find out what scenario(s) are impacted - there should only be 1
+ DEPLOY_SCENARIO=$(git diff HEAD^..HEAD --name-only | grep scenarios | awk -F '[/|/]' '{print $2}' | uniq)
+}
+
+echo "Determining the impacted scenario"