Add the exceptions and helpers.

tui_rsync/core/shared_kernel/ports/Exceptions/__init__.py

@@ -0,0 +1,4 @@
+from .app_exception import AppException
+from .command_exception import CommandException
+
+__all__ = ['AppException', 'CommandException']

tui_rsync/core/shared_kernel/ports/Exceptions/app_exception.py

@@ -0,0 +1,3 @@
+
+class AppException(Exception):
+    pass

tui_rsync/core/shared_kernel/ports/Exceptions/command_exception.py

@@ -0,0 +1,6 @@
+from . import AppException
+
+
+class CommandException(AppException):
+    """Command failed to change persistence data."""
+    pass

tui_rsync/user_interface/cli/shared_kernel/components/errors/applications/exceptions/__init__.py

@@ -0,0 +1,3 @@
+from .exception_helpers import catch_exception
+
+__all__ = ['catch_exception']

tui_rsync/user_interface/cli/shared_kernel/components/errors/applications/exceptions/exception_helpers.py

@@ -0,0 +1,18 @@
+from functools import wraps
+
+import typer
+from rich.console import Console
+
+
+def catch_exception(which_exception, exit_code=1):
+    def decorator(func):
+        @wraps(func)
+        def wrapper(*args, **kwargs):
+            try:
+                return func(*args, **kwargs)
+            except which_exception as e:
+                console = Console()
+                console.print(f'[red b][ERROR] {str(e)}[/]')
+                raise typer.Exit(code=exit_code)
+        return wrapper
+    return decorator