build!: drop Python 3.9 support

BREAKING CHANGE: Python 3.9 is not supported officially anymore. Python
    3.10 is the supported minimum version.

.github/workflows/ci.yml

@@ -74,7 +74,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v5
         with:
-          python-version: 3.9
+          python-version: "3.10"
       - name: Cache Python packages
         uses: actions/cache@v4
         with:
@@ -93,7 +93,7 @@ jobs:
     strategy:
       max-parallel: 4
       matrix:
-        python-version: ["3.9", "3.10", "3.11", "3.12"]
+        python-version: ["3.10", "3.11", "3.12"]
 
     steps:
       - name: Clone repo

pyproject.toml

@@ -3,7 +3,7 @@ requires = ["setuptools", "wheel"]
 
 [tool.ruff]
 src = ["src"]
-target-version = "py39"
+target-version = "py310"
 
 [tool.ruff.lint]
 select = [

src/autosuspend/__init__.py

@@ -2,7 +2,7 @@
 """A daemon to suspend a system on inactivity."""
 
 import argparse
-from collections.abc import Iterable, Sequence
+from collections.abc import Callable, Iterable, Sequence
 import configparser
 from contextlib import suppress
 from datetime import datetime, timedelta, timezone
@@ -13,7 +13,7 @@
 from pathlib import Path
 import subprocess
 import time
-from typing import Callable, IO, Optional, Union
+from typing import IO
 
 import portalocker
 
@@ -27,8 +27,8 @@
 
 
 def execute_suspend(
-    command: Union[str, Sequence[str]],
-    wakeup_at: Optional[datetime],
+    command: str | Sequence[str],
+    wakeup_at: datetime | None,
 ) -> None:
     """Suspend the system by calling the specified command.
 
@@ -49,9 +49,9 @@ def execute_suspend(
 
 
 def notify_suspend(
-    command_wakeup_template: Optional[str],
-    command_no_wakeup: Optional[str],
-    wakeup_at: Optional[datetime],
+    command_wakeup_template: str | None,
+    command_no_wakeup: str | None,
+    wakeup_at: datetime | None,
 ) -> None:
     """Call a command to notify on suspending.
 
@@ -92,10 +92,10 @@ def safe_exec(command: str) -> None:
 
 
 def notify_and_suspend(
-    suspend_cmd: Union[str, Sequence[str]],
-    notify_cmd_wakeup_template: Optional[str],
-    notify_cmd_no_wakeup: Optional[str],
-    wakeup_at: Optional[datetime],
+    suspend_cmd: str | Sequence[str],
+    notify_cmd_wakeup_template: str | None,
+    notify_cmd_no_wakeup: str | None,
+    wakeup_at: datetime | None,
 ) -> None:
     notify_suspend(notify_cmd_wakeup_template, notify_cmd_no_wakeup, wakeup_at)
     execute_suspend(suspend_cmd, wakeup_at)
@@ -114,7 +114,7 @@ def schedule_wakeup(command_template: str, wakeup_at: datetime) -> None:
         )
 
 
-def _safe_execute_activity(check: Activity, logger: logging.Logger) -> Optional[str]:
+def _safe_execute_activity(check: Activity, logger: logging.Logger) -> str | None:
     try:
         return check.check()
     except TemporaryCheckError:
@@ -154,7 +154,7 @@ def execute_checks(
 
 def _safe_execute_wakeup(
     check: Wakeup, timestamp: datetime, logger: logging.Logger
-) -> Optional[datetime]:
+) -> datetime | None:
     try:
         return check.check(timestamp)
     except TemporaryCheckError:
@@ -164,7 +164,7 @@ def _safe_execute_wakeup(
 
 def execute_wakeups(
     wakeups: Iterable[Wakeup], timestamp: datetime, logger: logging.Logger
-) -> Optional[datetime]:
+) -> datetime | None:
     wakeup_at = None
     for wakeup in wakeups:
         this_at = _safe_execute_wakeup(wakeup, timestamp, logger)
@@ -314,7 +314,7 @@ def iteration(self, timestamp: datetime, just_woke_up: bool) -> None:
         self._sleep_fn(wakeup_at)
 
 
-def _continue_looping(run_for: Optional[int], start_time: datetime) -> bool:
+def _continue_looping(run_for: int | None, start_time: datetime) -> bool:
     return (run_for is None) or (
         datetime.now(timezone.utc) < (start_time + timedelta(seconds=run_for))
     )
@@ -348,7 +348,7 @@ def _do_loop_iteration(
 def loop(
     processor: Processor,
     interval: float,
-    run_for: Optional[int],
+    run_for: int | None,
     woke_up_file: Path,
     lock_file: Path,
     lock_timeout: float,
@@ -504,7 +504,7 @@ def parse_config(config_file: Iterable[str]) -> configparser.ConfigParser:
     return config
 
 
-def parse_arguments(args: Optional[Sequence[str]]) -> argparse.Namespace:
+def parse_arguments(args: Sequence[str] | None) -> argparse.Namespace:
     """Parse command line arguments.
 
     Args:
@@ -517,7 +517,7 @@ def parse_arguments(args: Optional[Sequence[str]]) -> argparse.Namespace:
         formatter_class=argparse.ArgumentDefaultsHelpFormatter,
     )
 
-    default_config: Optional[IO[str]] = None
+    default_config: IO[str] | None = None
     with suppress(FileNotFoundError, IsADirectoryError, PermissionError):
         # The open file is required after this function finishes inside the argparse
         # result. Therefore, a context manager is not easily usable here.
@@ -596,7 +596,7 @@ def parse_arguments(args: Optional[Sequence[str]]) -> argparse.Namespace:
     return result
 
 
-def configure_logging(config_file: Optional[IO], debug: bool) -> None:
+def configure_logging(config_file: IO | None, debug: bool) -> None:
     """Configure the python :mod:`logging` system.
 
     Assumes that either a config file is provided, or debugging is enabled.
@@ -794,7 +794,7 @@ def main_daemon(args: argparse.Namespace, config: configparser.ConfigParser) ->
     )
 
 
-def main(argv: Optional[Sequence[str]] = None) -> None:
+def main(argv: Sequence[str] | None = None) -> None:
     """Run the daemon."""
     args = parse_arguments(argv)
 

src/autosuspend/checks/__init__.py

@@ -4,7 +4,7 @@
 from collections.abc import Mapping
 import configparser
 from datetime import datetime
-from typing import Any, Optional, TypeVar
+from typing import Any, TypeVar
 
 from autosuspend.util import logger_by_class_instance
 
@@ -60,7 +60,7 @@ def create(
 
         """
 
-    def __init__(self, name: Optional[str] = None) -> None:
+    def __init__(self, name: str | None = None) -> None:
         if name:
             self.name = name
         else:
@@ -87,7 +87,7 @@ class Activity(Check):
     """
 
     @abc.abstractmethod
-    def check(self) -> Optional[str]:
+    def check(self) -> str | None:
         """Determine if system activity exists that prevents suspending.
 
         Returns:
@@ -108,7 +108,7 @@ class Wakeup(Check):
     """Represents a check for potential wake up points."""
 
     @abc.abstractmethod
-    def check(self, timestamp: datetime) -> Optional[datetime]:
+    def check(self, timestamp: datetime) -> datetime | None:
         """Indicate if a wakeup has to be scheduled for this check.
 
         Args:

src/autosuspend/checks/command.py

@@ -1,7 +1,6 @@
 import configparser
 from datetime import datetime, timezone
 import subprocess
-from typing import Optional
 
 from . import (
     Activity,
@@ -38,7 +37,7 @@ def __init__(self, name: str, command: str) -> None:
         CommandMixin.__init__(self, command)
         Activity.__init__(self, name)
 
-    def check(self) -> Optional[str]:
+    def check(self) -> str | None:
         try:
             subprocess.check_call(self._command, shell=True)
             return f"Command {self._command} succeeded"
@@ -58,7 +57,7 @@ def __init__(self, name: str, command: str) -> None:
         CommandMixin.__init__(self, command)
         Wakeup.__init__(self, name)
 
-    def check(self, timestamp: datetime) -> Optional[datetime]:  # noqa: ARG002
+    def check(self, timestamp: datetime) -> datetime | None:  # noqa: ARG002
         try:
             output = subprocess.check_output(
                 self._command,

src/autosuspend/checks/ical.py

@@ -3,7 +3,7 @@
 from dataclasses import dataclass
 from datetime import date, datetime, timedelta, timezone, tzinfo
 from io import BytesIO
-from typing import Any, cast, IO, Optional, TypeVar, Union
+from typing import Any, cast, IO, TypeVar
 
 from dateutil.rrule import rrule, rruleset, rrulestr
 import icalendar
@@ -19,12 +19,12 @@
 @dataclass
 class CalendarEvent:
     summary: str
-    start: Union[datetime, date]
-    end: Union[datetime, date]
+    start: datetime | date
+    end: datetime | date
 
     def __str__(self) -> str:
-        return "CalendarEvent[summary={}, start={}, end={}]".format(
-            self.summary, self.start, self.end
+        return (
+            f"CalendarEvent[summary={self.summary}, start={self.start}, end={self.end}]"
         )
 
 
@@ -60,7 +60,7 @@ def _prepare_rruleset_for_expanding(
     start: datetime,
     exclusions: Iterable,
     changes: Iterable[icalendar.cal.Event],
-    tz: Optional[tzinfo],
+    tz: tzinfo | None,
 ) -> rruleset:
     """Prepare an rruleset for expanding.
 
@@ -291,7 +291,7 @@ def __init__(self, name: str, **kwargs: Any) -> None:
         NetworkMixin.__init__(self, **kwargs)
         Activity.__init__(self, name)
 
-    def check(self) -> Optional[str]:
+    def check(self) -> str | None:
         response = self.request()
         start = datetime.now(timezone.utc)
         end = start + timedelta(minutes=1)
@@ -315,7 +315,7 @@ def __init__(self, name: str, **kwargs: Any) -> None:
         NetworkMixin.__init__(self, **kwargs)
         Wakeup.__init__(self, name)
 
-    def check(self, timestamp: datetime) -> Optional[datetime]:
+    def check(self, timestamp: datetime) -> datetime | None:
         response = self.request()
 
         end = timestamp + timedelta(weeks=6 * 4)

src/autosuspend/checks/json.py

@@ -1,7 +1,7 @@
 import configparser
 import json
 from textwrap import shorten
-from typing import Any, Optional
+from typing import Any
 
 from jsonpath_ng import JSONPath
 import requests
@@ -32,7 +32,7 @@ def __init__(self, name: str, jsonpath: JSONPath, **kwargs: Any) -> None:
         NetworkMixin.__init__(self, accept="application/json", **kwargs)
         self._jsonpath = jsonpath
 
-    def check(self) -> Optional[str]:
+    def check(self) -> str | None:
         try:
             reply = self.request().json()
             matched = self._jsonpath.find(reply)

src/autosuspend/checks/kodi.py

@@ -1,6 +1,6 @@
 import configparser
 import json
-from typing import Any, Optional
+from typing import Any
 
 from . import Activity, ConfigurationError, TemporaryCheckError
 from .util import NetworkMixin
@@ -52,7 +52,7 @@ def _safe_request_result(self) -> dict:
         except (KeyError, TypeError, json.JSONDecodeError) as error:
             raise TemporaryCheckError("Unable to get or parse Kodi state") from error
 
-    def check(self) -> Optional[str]:
+    def check(self) -> str | None:
         reply = self._safe_request_result()
         if self._suspend_while_paused:
             return (
@@ -87,7 +87,7 @@ def __init__(self, name: str, url: str, idle_time: int, **kwargs: Any) -> None:
         Activity.__init__(self, name)
         self._idle_time = idle_time
 
-    def check(self) -> Optional[str]:
+    def check(self) -> str | None:
         try:
             reply = self.request().json()
             if not reply["result"][f"System.IdleTime({self._idle_time})"]:

src/autosuspend/checks/linux.py

@@ -11,7 +11,6 @@
 import socket
 import subprocess
 import time
-from typing import Optional
 import warnings
 
 import psutil
@@ -60,7 +59,7 @@ def normalize_address(
         else:
             return family, address
 
-    def check(self) -> Optional[str]:
+    def check(self) -> str | None:
         # Find the addresses of the system
         own_addresses = [
             self.normalize_address(item.family, item.address)
@@ -98,7 +97,7 @@ def __init__(self, name: str, threshold: float) -> None:
         Activity.__init__(self, name)
         self._threshold = threshold
 
-    def check(self) -> Optional[str]:
+    def check(self) -> str | None:
         loadcurrent = os.getloadavg()[1]
         self.logger.debug("Load: %s", loadcurrent)
         if loadcurrent > self._threshold:
@@ -188,7 +187,7 @@ def _check_interface(
                 f"higher than threshold {self._threshold_receive}"
             )
 
-    def check(self) -> Optional[str]:
+    def check(self) -> str | None:
         # acquire the previous state and preserve it
         old_values = self._previous_values
         old_time = self._previous_time
@@ -237,7 +236,7 @@ def __init__(self, name: str, hosts: Iterable[str]) -> None:
         Activity.__init__(self, name)
         self._hosts = hosts
 
-    def check(self) -> Optional[str]:
+    def check(self) -> str | None:
         try:
             for host in self._hosts:
                 cmd = ["ping", "-q", "-c", "1", host]
@@ -270,7 +269,7 @@ def __init__(self, name: str, processes: Iterable[str]) -> None:
         Activity.__init__(self, name)
         self._processes = processes
 
-    def check(self) -> Optional[str]:
+    def check(self) -> str | None:
         for proc in psutil.process_iter():
             with suppress(psutil.NoSuchProcess):
                 pinfo = proc.name()
@@ -306,7 +305,7 @@ def __init__(
         self._terminal_regex = terminal_regex
         self._host_regex = host_regex
 
-    def check(self) -> Optional[str]:
+    def check(self) -> str | None:
         for entry in psutil.users():
             if (
                 self._user_regex.fullmatch(entry.name) is not None
@@ -344,7 +343,7 @@ def __init__(self, name: str, path: Path) -> None:
         Wakeup.__init__(self, name)
         self._path = path
 
-    def check(self, timestamp: datetime) -> Optional[datetime]:  # noqa: ARG002
+    def check(self, timestamp: datetime) -> datetime | None:  # noqa: ARG002
         try:
             first_line = self._path.read_text().splitlines()[0]
             return datetime.fromtimestamp(float(first_line.strip()), timezone.utc)