Do not exit on backup failure

Exit caused email notifications to be not sent when backup fails. We especially
want to be notified if a backup fails.

backup.sh

@@ -31,18 +31,17 @@ logLast "AWS_ACCESS_KEY_ID: ${AWS_ACCESS_KEY_ID}"
 
 # Do not save full backup log to logfile but to backup-last.log
 restic backup /data ${RESTIC_JOB_ARGS} --tag=${RESTIC_TAG?"Missing environment variable RESTIC_TAG"} >> ${lastLogfile} 2>&1
-rc=$?
+backupRC=$?
 logLast "Finished backup at $(date)"
-if [[ $rc == 0 ]]; then
-    echo "Backup Successfull" 
+if [[ $backupRC == 0 ]]; then
+    echo "Backup Successfull"
 else
-    echo "Backup Failed with Status ${rc}"
+    echo "Backup Failed with Status ${backupRC}"
     restic unlock
     copyErrorLog
-    exit 1
 fi
 
-if [ -n "${RESTIC_FORGET_ARGS}" ]; then
+if [[ $backupRC == 0 ]] && [ -n "${RESTIC_FORGET_ARGS}" ]; then
     echo "Forget about old snapshots based on RESTIC_FORGET_ARGS = ${RESTIC_FORGET_ARGS}"
     restic forget ${RESTIC_FORGET_ARGS} >> ${lastLogfile} 2>&1
     rc=$?