drop python<=3.7 support

According to https://endoflife.date/python python 3.7 has been EOSed
27 Jun 2023.
Filter all code over `pyupgrade --py38-plus`.

Signed-off-by: Tomasz Kłoczko <[email protected]>

Author: kloczek

src/scikit_build_core/_compat/importlib/metadata.py

@@ -1,15 +1,9 @@
 from __future__ import annotations
 
+import importlib.metadata as _metadata
 import sys
 import typing
-
-if sys.version_info < (3, 8):
-    import importlib_metadata as _metadata
-    from importlib_metadata import PathDistribution, version
-else:
-    import importlib.metadata as _metadata
-    from importlib.metadata import PathDistribution, version
-
+from importlib.metadata import PathDistribution, version
 
 if typing.TYPE_CHECKING:
     if sys.version_info < (3, 8):

src/scikit_build_core/_compat/typing.py

@@ -2,14 +2,7 @@
 
 import sys
 import typing
-
-if sys.version_info < (3, 8):
-    from typing_extensions import (
-        Literal,
-        Protocol,
-    )
-else:
-    from typing import Literal, Protocol
+from typing import Literal, Protocol
 
 if sys.version_info < (3, 9):
     from typing_extensions import Annotated, get_args, get_origin

src/scikit_build_core/_logging.py

@@ -44,10 +44,7 @@ def __repr__(self) -> str:
         )
 
 
-if sys.version_info < (3, 8):
-    opts: Any = {}
-else:
-    opts: Any = {"stacklevel": 2}
+opts: Any = {"stacklevel": 2}
 
 
 class ScikitBuildLogger:

tests/conftest.py

@@ -8,17 +8,12 @@
 import subprocess
 import sys
 import sysconfig
+from importlib import metadata
 from pathlib import Path
+from typing import Literal, overload
 
 import virtualenv as _virtualenv
 
-if sys.version_info < (3, 8):
-    import importlib_metadata as metadata
-    from typing_extensions import Literal, overload
-else:
-    from importlib import metadata
-    from typing import Literal, overload
-
 if sys.version_info < (3, 11):
     import tomli as tomllib
 else:

tests/test_custom_modules.py

@@ -23,10 +23,9 @@ def test_ep(isolated):
     contents = Path(script).read_text()
     assert contents.startswith(f"#!{pysys}")
 
-    if sys.version_info >= (3, 8):
-        assert (
-            isolated.execute(
-                "from importlib import metadata; print(metadata.version('custom_modules'), end='')"
-            )
-            == "2.3.4"
+    assert (
+        isolated.execute(
+            "from importlib import metadata; print(metadata.version('custom_modules'), end='')"
         )
+        == "2.3.4"
+    )

tests/test_dynamic_metadata.py

@@ -3,7 +3,6 @@
 import importlib
 import shutil
 import subprocess
-import sys
 import types
 import zipfile
 from pathlib import Path
@@ -238,11 +237,10 @@ def test_pep517_wheel(virtualenv):
     assert wheel == dist / out
 
     virtualenv.install(wheel)
-    if sys.version_info >= (3, 8):
-        license = virtualenv.execute(
-            "from importlib.metadata import metadata; print(metadata('dynamic')['License'])"
-        )
-        assert license == "MIT License"
+    license = virtualenv.execute(
+        "from importlib.metadata import metadata; print(metadata('dynamic')['License'])"
+    )
+    assert license == "MIT License"
 
     with zipfile.ZipFile(wheel) as zf:
         file_paths = {Path(n) for n in zf.namelist()}