+# This function determines the impacted generic scenario by processing the
+# 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
+# releng-xci/scenarios/<scenario>/<impacted files>: <scenario>
+# releng-xci/xci/installer/osa/<impacted files>: os-nosdn-nofeature
+# releng-xci/xci/installer/kubespray/<impacted files>: k8-nosdn-nofeature
+# the rest: os-nosdn-nofeature
+function determine_generic_scenario() {
+ echo "Processing $GERRIT_PROJECT patchset $GERRIT_REFSPEC"
+
+ # get the changeset
+ cd $WORKSPACE
+ CHANGESET=$(git diff HEAD^..HEAD --name-only)
+ for CHANGED_FILE in $CHANGESET; do
+ case $CHANGED_FILE in
+ *k8-nosdn*|*kubespray*)
+ [[ ${DEPLOY_SCENARIO[@]} =~ "k8-nosdn-nofeature" ]] || DEPLOY_SCENARIO[${#DEPLOY_SCENARIO[@]}]='k8-nosdn-nofeature'
+ ;;
+ *os-odl*)
+ [[ ${DEPLOY_SCENARIO[@]} =~ "os-odl-nofeature" ]] || DEPLOY_SCENARIO[${#DEPLOY_SCENARIO[@]}]='os-odl-nofeature'
+ ;;
+ *os-nosdn*|*osa*)
+ [[ ${DEPLOY_SCENARIO[@]} =~ "os-nosdn-nofeature" ]] || DEPLOY_SCENARIO[${#DEPLOY_SCENARIO[@]}]='os-nosdn-nofeature'
+ ;;
+ *)
+ [[ ${DEPLOY_SCENARIO[@]} =~ "os-nosdn-nofeature" ]] || DEPLOY_SCENARIO[${#DEPLOY_SCENARIO[@]}]='os-nosdn-nofeature'
+ ;;
+ esac
+ done
+}
+
+# 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 patchset $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"
+
+declare -a DEPLOY_SCENARIO