add timestamp override for smart-punch command

timebot.py

@@ -301,8 +301,9 @@ if __name__ == '__main__':
                                                help="use this command to auto punch in, punch out and create break "
                                                     "entries; this command tries to detect your last action and will "
                                                     "create entries in to following order: "
-                                                    "punch_in(now) -> break_start(now) -> break_end(now) "
-                                                    "-> punch_out(now)")
+                                                    "punch_in -> break_start -> break_end -> punch_out")
+    parser_smart_punch.add_argument("-s", help=f"timestamp in format `{SIMPLE_DATETIME_FORMAT_HUMAN}` or `now`",
+                                    default="now")
 
     args = parser.parse_args()
 
@@ -326,8 +327,11 @@ if __name__ == '__main__':
         ))
         getattr(tb, args.t)(punch_datetime)
     elif args.subparser_name == "smart-punch":
-        now = datetime.datetime.now()
-        last_punch = tb.get_entries(1, now.replace(hour=0, minute=0, second=0, microsecond=0))
+        if args.s == "now":
+            punch_datetime = datetime.datetime.now()
+        else:
+            punch_datetime = datetime.datetime.strptime(args.s, SIMPLE_DATETIME_FORMAT)
+        last_punch = tb.get_entries(1, punch_datetime.replace(hour=0, minute=0, second=0, microsecond=0))
         method = None
         if not last_punch:
             logger.debug("could not detect any time entry for today... punching in")
@@ -350,10 +354,10 @@ if __name__ == '__main__':
             exit(1)
         logger.info("running `{}` with date `{}` and time `{}`".format(
             method,
-            now.strftime(SIMPLE_DATE_FORMAT),
-            now.strftime(SIMPLE_TIME_FORMAT),
+            punch_datetime.strftime(SIMPLE_DATE_FORMAT),
+            punch_datetime.strftime(SIMPLE_TIME_FORMAT),
         ))
-        getattr(tb, method)(now)
+        getattr(tb, method)(punch_datetime)
     elif args.subparser_name == "list-entries":
         end_date = None
         if args.end_date: