gracefully exit when given invalid dates

kosmorro/__main__.py

@@ -135,6 +135,10 @@ def run():
                 use_colors,
                 args.show_graph,
             )
+    except InvalidDateRangeError as error:
+        print_stderr(colored(error, "red"))
+        debug.debug_print(error)
+        return 6
     except SearchDatesNotGivenError as error:
         print_stderr(colored(error.msg, "red"))
         debug.debug_print(error)
@@ -270,23 +274,10 @@ def get_search_information(
             show_graph=show_graph,
             search_enabled=True,
         )
-    except InvalidDateRangeError as error:
-        print(
-            colored(
-                _(
-                    "Search start date {start_search} must be before end date {end_search}"
-                ).format(
-                    start_search=format_date(error.start_date, "long"),
-                    end_search=format_date(error.end_date, "long"),
-                ),
-                "red",
-            )
-        )
     except KeyError as error:
         raise InvalidOutputFormatError(output_format, list(get_dumpers().keys()))
     except OutOfRangeDateError as error:
-        print(colored(error.msg, "red"))
-        debug.debug_print(error)
+        raise DateRangeError(error.min_date, error.max_date)
 
 
 def get_dumpers() -> {str: dumper.Dumper}:

kosmorro/exceptions.py

@@ -40,19 +40,6 @@ class OutOfRangeDateError(RuntimeError):
         )
 
 
-class InvalidDateRangeError(RuntimeError):
-    def __init__(self, start_date: date, end_date: date):
-        super().__init__()
-        self.start_date = start_date
-        self.end_date = end_date
-        self.msg = _(
-            "The start date {starting_date} must be before the end date {ending_date}"
-        ).format(
-            starting_date=format_date(start_date, "long"),
-            ending_date=format_date(end_date, "long"),
-        )
-
-
 class InvalidOutputFormatError(RuntimeError):
     def __init__(self, output_format: str, accepted_extensions: [str]):
         super().__init__()
@@ -70,7 +57,7 @@ class SearchDatesNotGivenError(RuntimeError):
     def __init__(self):
         super().__init__()
         self.msg = _(
-            "Search end date (--until) is required when searching events.'"
+            "Search end date (--until) is required when searching events."
         )