ttcn3-bts-test: show respawn count at the end

As mentioned in the last commit, we currently must use respawn.sh to be able to recover from clock skew errors seen in jenkins. Let's display the respawn count at the end as warning. Related: OS#6794 Change-Id: I4e5c3dd46ec682bfd79f2328195b0050fe3f186d

Author: osmith42

common/respawn.sh

@@ -7,7 +7,7 @@ SLEEP_BEFORE_RESPAWN=${SLEEP_BEFORE_RESPAWN:-0}
 i=0
 max_i=500
 while [ $i -lt $max_i ]; do
-echo "$i: starting: $*"
+echo "respawn: $i: starting: $*"
 $* &
 LAST_PID=$!
 wait $LAST_PID

ttcn3-bts-test/jenkins.sh

@@ -229,6 +229,27 @@ start_config_hopping() {
 docker_kill_wait ${BUILD_TAG}-bts
 }
 
+show_respawn_count() {
+set +x
+local count=$(grep -P 'respawn: \d+: starting: ' "$VOL_BASE_DIR"/bts/osmo-bts.log | wc -l)
+# Currently we run generic/bts/oml configurations, which means 3
+# restarts are expected.
+local count_exp=3
+
+if [ "$count" = "$count_exp" ]; then
+echo "osmo-bts was respawned $count times (as expected)"
+return
+fi
+
+printf '\033[0;31m' # set color to red
+echo
+echo "================================================================"
+echo " WARNING: osmo-bts was respawned $count times (expected: $count_exp)! (OS#6794)"
+echo "================================================================"
+echo
+printf '\033[0m'
+}
+
 network_create
 
 mkdir $VOL_BASE_DIR/bts-tester-generic
@@ -272,3 +293,7 @@ start_config_generic
 start_config_virtphy
 start_config_oml
 start_config_hopping
+
+# Show respawn count at the very end
+clean_up_common
+show_respawn_count