xci: Set the installer and move scenario extraction into functions

The scenarios named os-* are deployed by osa and the ones
named k8-* are deployed by kubespray. This change determines
the installer to use by looking into the scenario name.

The installers are currently hardcoded within xci-set-scenario.sh
script and this needs to be fixed for other installers when they
onboard to xci.

Apart from setting the installer, extraction of generic and external
scenarios are moved into corresponding functions.

Change-Id: I19882bcd2a1260765e601ecbe517551c60401d74
Signed-off-by: Fatih Degirmenci <fdegir@gmail.com>

2 files changed, 65 insertions, 33 deletions

diff --git a/jjb/xci/xci-set-scenario.sh b/jjb/xci/xci-set-scenario.sh
index 764857ba4..9a6cb51c5 100755
--- a/jjb/xci/xci-set-scenario.sh
+++ b/jjb/xci/xci-set-scenario.sh
@@ -17,12 +17,52 @@ set -o pipefail
 # what you are doing.
 #----------------------------------------------------------------------
 
-WORK_DIRECTORY=/tmp/$GERRIT_CHANGE_NUMBER/$DISTRO
-/bin/rm -rf $WORK_DIRECTORY && mkdir -p $WORK_DIRECTORY
+# 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"
 
 # ensure GERRIT_TOPIC is set
 GERRIT_TOPIC="${GERRIT_TOPIC:-''}"
 
+# this directory is where the temporary clones and files are created
+# while extracting the impacted scenario
+WORK_DIRECTORY=/tmp/$GERRIT_CHANGE_NUMBER/$DISTRO
+/bin/rm -rf $WORK_DIRECTORY && mkdir -p $WORK_DIRECTORY
+
 # skip the healthcheck if the patch doesn't impact the deployment
 if [[ "$GERRIT_TOPIC" =~ skip-verify|skip-deployment ]]; then
     echo "Skipping verify!"
@@ -30,36 +70,12 @@ if [[ "$GERRIT_TOPIC" =~ skip-verify|skip-deployment ]]; then
     exit 0
 fi
 
-# if the scenario is external, we need to wipe WORKSPACE to place releng-xci there since
-# the project where the scenario is coming from is cloned and the patch checked out to the
-# xci/scenarios/$DEPLOY_SCENARIO to be synched on clean VM
-# apart from that, we need releng-xci stuff in WORKSPACE for things to function correctly on Jenkins.
-# if the change is coming to releng-xci, we don't need to do anything since the patch is checked
-# out to the WORKSPACE anyways
-if [[ $GERRIT_PROJECT != "releng-xci" ]]; then
-    cd $HOME && /bin/rm -rf $WORKSPACE
-    git clone https://gerrit.opnfv.org/gerrit/releng-xci $WORKSPACE && cd $WORKSPACE
-    chmod -R go-rwx $WORKSPACE/xci/scripts/vm
-fi
-
-# if change is coming to releng-xci, continue as usual until that part is fixed as well
 if [[ $GERRIT_PROJECT == "releng-xci" ]]; then
-    # save the scenario name into java properties file to be injected to downstream jobs via envInject
-    echo "Recording scenario name for downstream jobs"
-    echo "DEPLOY_SCENARIO=os-nosdn-nofeature" > $WORK_DIRECTORY/scenario.properties
-    exit 0
+    determine_generic_scenario
+else
+    determine_external_scenario
 fi
 
-# projects develop different scenarios and jobs need to know which scenario got the
-# change under test so the jobs can deploy and test the right scenario.
-# we need to fetch the change and look at the changeset to find out the scenario instead
-# of hardcoding scenario per project.
-
-git clone https://gerrit.opnfv.org/gerrit/$GERRIT_PROJECT $WORK_DIRECTORY/$GERRIT_PROJECT
-cd $WORK_DIRECTORY/$GERRIT_PROJECT
-git fetch https://gerrit.opnfv.org/gerrit/$GERRIT_PROJECT $GERRIT_REFSPEC && git checkout FETCH_HEAD
-DEPLOY_SCENARIO=$(git diff HEAD^..HEAD --name-only | grep scenarios | awk -F '[/|/]' '{print $2}' | uniq)
-
 # ensure single scenario is impacted
 if [[ $(echo $DEPLOY_SCENARIO | wc -w) != 1 ]]; then
     echo "Change impacts multiple scenarios!"
@@ -68,9 +84,25 @@ if [[ $(echo $DEPLOY_SCENARIO | wc -w) != 1 ]]; then
     exit 1
 fi
 
-# save the scenario name into java properties file to be injected to downstream jobs via envInject
-echo "Recording scenario name '$DEPLOY_SCENARIO' for downstream jobs"
-echo "DEPLOY_SCENARIO=$DEPLOY_SCENARIO" > $WORK_DIRECTORY/scenario.properties
+# set the installer
+case $DEPLOY_SCENARIO in
+    os-*)
+        XCI_INSTALLER=osa
+        ;;
+    k8-*)
+        XCI_INSTALLER=kubespray
+        ;;
+    *)
+        echo "Unable to determine the installer. Exiting!"
+        exit 1
+        ;;
+esac
+
+# save the installer and scenario names into java properties file
+# so they can be injected to downstream jobs via envInject
+echo "Recording the installer '$XCI_INSTALLER' and scenario '$DEPLOY_SCENARIO' for downstream jobs"
+echo "XCI_INSTALLER=$XCI_INSTALLER" > $WORK_DIRECTORY/scenario.properties
+echo "DEPLOY_SCENARIO=$DEPLOY_SCENARIO" >> $WORK_DIRECTORY/scenario.properties
 
 # skip the deployment if the scenario is not supported on this distro
 OPNFV_SCENARIO_REQUIREMENTS=$WORKSPACE/xci/opnfv-scenario-requirements.yml
diff --git a/jjb/xci/xci-verify-jobs.yml b/jjb/xci/xci-verify-jobs.yml
index b1fe23d0c..c95917f09 100644
--- a/jjb/xci/xci-verify-jobs.yml
+++ b/jjb/xci/xci-verify-jobs.yml
@@ -239,7 +239,7 @@
           default: $WORKSPACE/
       - string:
           name: INSTALLER_TYPE
-          default: 'osa'
+          default: $XCI_INSTALLER
       - string:
           name: GIT_BASE
           default: https://gerrit.opnfv.org/gerrit/$PROJECT