use exceptions

src/safe-redis-cli/saferediscli.nim

@@ -20,6 +20,13 @@ if admin:
 echo "hostname: ", hostname
 echo "port:     ", optPort
 
-var conn = redis.open(hostname, optPort.Port)
+var conn: redis.Redis
+
+try:
+  conn = redis.open(hostname, optPort.Port)
+
+except:
+  echo "Could not connect to redis: " & getCurrentExceptionMsg()
+  quit()
 
 conn.quit()