Drop EOL Python 3.8 support (#1162)

* Drop EOL Python 3.8 support

* Run pyupgrade --py39-plus on all files

* Revert using direct annotations in looponfail.py

We need to use string annotations otherwise we get this error:

```
ValueError: ("the use of non-builtin globals isn't supported", ['execnet', 'Any'])
```

Author: nicoddemus

.github/workflows/test.yml

@@ -34,8 +34,7 @@ jobs:
       fail-fast: false
       matrix:
         tox_env:
-          - "py38-pytestmin"
-          - "py38-pytestlatest"
+          - "py39-pytestmin"
           - "py39-pytestlatest"
           - "py310-pytestlatest"
           - "py311-pytestlatest"
@@ -47,10 +46,8 @@ jobs:
 
         os: [ubuntu-latest, windows-latest]
         include:
-          - tox_env: "py38-pytestmin"
-            python: "3.8"
-          - tox_env: "py38-pytestlatest"
-            python: "3.8"
+          - tox_env: "py39-pytestmin"
+            python: "3.9"
           - tox_env: "py39-pytestlatest"
             python: "3.9"
           - tox_env: "py310-pytestlatest"

changelog/1162.removal.rst

@@ -0,0 +1 @@
+Dropped support for EOL Python 3.8.

pyproject.toml

@@ -25,14 +25,13 @@ classifiers = [
     "Programming Language :: Python",
     "Programming Language :: Python :: 3",
     "Programming Language :: Python :: 3 :: Only",
-    "Programming Language :: Python :: 3.8",
     "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
     "Programming Language :: Python :: 3.13",
 ]
-requires-python = ">=3.8"
+requires-python = ">=3.9"
 dependencies = [
     "execnet>=2.1",
     "pytest>=7.0.0",

src/xdist/_path.py

@@ -1,8 +1,8 @@
+from collections.abc import Iterator
 from itertools import chain
 import os
 from pathlib import Path
 from typing import Callable
-from typing import Iterator
 
 
 def visit_path(

src/xdist/dsession.py

@@ -1,12 +1,12 @@
 from __future__ import annotations
 
+from collections.abc import Sequence
 from enum import auto
 from enum import Enum
 from queue import Empty
 from queue import Queue
 import sys
 from typing import Any
-from typing import Sequence
 import warnings
 
 import execnet

src/xdist/looponfail.py

@@ -9,12 +9,12 @@
 
 from __future__ import annotations
 
+from collections.abc import Sequence
 import os
 from pathlib import Path
 import sys
 import time
 from typing import Any
-from typing import Sequence
 
 from _pytest._io import TerminalWriter
 import execnet

src/xdist/newhooks.py

@@ -14,9 +14,9 @@
 
 from __future__ import annotations
 
+from collections.abc import Sequence
 import os
 from typing import Any
-from typing import Sequence
 from typing import TYPE_CHECKING
 
 import execnet

src/xdist/remote.py

@@ -9,16 +9,16 @@
 from __future__ import annotations
 
 import collections
+from collections.abc import Generator
+from collections.abc import Iterable
+from collections.abc import Sequence
 import contextlib
 import enum
 import os
 import sys
 import time
 from typing import Any
-from typing import Generator
-from typing import Iterable
 from typing import Literal
-from typing import Sequence
 from typing import TypedDict
 from typing import Union
 import warnings
@@ -98,7 +98,7 @@ def replace(self, iterable: Iterable[Item]) -> None:
             self._items = collections.deque(iterable)
 
     @contextlib.contextmanager
-    def lock(self) -> Generator[collections.deque[Item], None, None]:
+    def lock(self) -> Generator[collections.deque[Item]]:
         with self._lock:
             try:
                 yield self._items

src/xdist/report.py

@@ -1,7 +1,7 @@
 from __future__ import annotations
 
+from collections.abc import Sequence
 from difflib import unified_diff
-from typing import Sequence
 
 
 def report_collection_diff(

src/xdist/scheduler/each.py

@@ -1,6 +1,6 @@
 from __future__ import annotations
 
-from typing import Sequence
+from collections.abc import Sequence
 
 import pytest