Make annotations compatible with Python 3.9

Fixes: #544

docs/source/conf.py

@@ -1,4 +1,5 @@
 # noqa: INP001
+from __future__ import annotations
 
 from typing import Iterator
 

pyproject.toml

@@ -87,6 +87,7 @@ target-version = "py38"
 
 [tool.ruff.isort]
 force-single-line = true
+required-imports = ["from __future__ import annotations"]
 
 [build-system]
 requires = ["setuptools>=45", "wheel", "setuptools_scm>=6.2"]

tests/conftest.py

@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 import os
 import time
 from datetime import datetime

tests/helpers.py

@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 __all__ = [
     "pyicu_sensitive",
 ]

tests/test_backend.py

@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from datetime import date
 from datetime import datetime
 

tests/test_cli.py

@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 import datetime
 import sys
 from os.path import exists

tests/test_config.py

@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from unittest.mock import patch
 
 import pytest

tests/test_filtering.py

@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from datetime import datetime
 from datetime import timedelta
 from uuid import uuid4

tests/test_formatter.py

@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from datetime import date
 from datetime import datetime
 from datetime import time

tests/test_main.py

@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 import os
 import sys
 from subprocess import PIPE

tests/test_model.py

@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from datetime import date
 from datetime import datetime
 from datetime import timedelta

tests/test_porcelain.py

@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 import json
 from datetime import datetime
 from uuid import uuid4

tests/test_ui.py

@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from datetime import datetime
 from unittest import mock
 

tests/test_widgets.py

@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from unittest import mock
 
 from todoman.widgets import ExtendedEdit

todoman/__init__.py

@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from todoman import version  # type: ignore[attr-defined]
 
 __version__ = version.version

todoman/__main__.py

@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from todoman.cli import cli
 
 if __name__ == "__main__":

todoman/cli.py

@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 import contextlib
 import functools
 import glob
@@ -7,7 +9,6 @@
 from datetime import datetime
 from datetime import timedelta
 from os.path import isdir
-from typing import Tuple
 
 import click
 import click_log
@@ -97,7 +98,7 @@ def _validate_priority_param(ctx, param, val):
         raise click.BadParameter(e) from None
 
 
-def _validate_start_date_param(ctx, param, val) -> Tuple[bool, datetime] | None:
+def _validate_start_date_param(ctx, param, val) -> tuple[bool, datetime] | None:
     ctx = ctx.find_object(AppContext)
     if not val:
         return None

todoman/exceptions.py

@@ -1,3 +1,6 @@
+from __future__ import annotations
+
+
 class TodomanError(Exception):
     """
     Base class for all our exceptions.

todoman/interactive.py

@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 import urwid
 
 from todoman import widgets

todoman/widgets.py

@@ -19,6 +19,8 @@
 # LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 # OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 # WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+from __future__ import annotations
+
 import re
 from typing import Callable