chore: some touchups & 3.12 classifier (#539)

Signed-off-by: Henry Schreiner <[email protected]>

pyproject.toml

@@ -18,6 +18,7 @@ classifiers = [
     "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
+    "Programming Language :: Python :: 3.12",
 ]
 authors = [{name = "Daniel Holth", email = "[email protected]"}]
 maintainers = [{name = "Alex Grönholm", email = "[email protected]"}]
@@ -39,7 +40,7 @@ bdist_wheel = "wheel.bdist_wheel:bdist_wheel"
 [project.optional-dependencies]
 test = [
     "pytest >= 6.0.0",
-    "setuptools >= 65"
+    "setuptools >= 65",
 ]
 
 [tool.flit.sdist]
@@ -97,25 +98,27 @@ select = [
     "I",            # isort
     "PGH",          # pygrep-hooks
     "UP",           # pyupgrade
-    "B0",           # flake8-bugbear
+    "B",            # flake8-bugbear
 ]
 src = ["src"]
 
+# Tox (https://tox.wiki/) is a tool for running tests in multiple virtualenvs.
+# This configuration file will run the test suite on all supported python
+# versions. To use it, "pipx install tox" and then run "tox" from this
+# directory.
+
 [tool.tox]
 legacy_tox_ini = '''
-# Tox (https://tox.wiki/) is a tool for running tests
-# in multiple virtualenvs. This configuration file will run the
-# test suite on all supported python versions. To use it, "pip install tox"
-# and then run "tox" from this directory.
-
 [tox]
-envlist = py37, py38, py39, py310, py311, pypy3, lint, pkg
+envlist = py37, py38, py39, py310, py311, py312, pypy3, lint, pkg
 minversion = 4.0.0
 skip_missing_interpreters = true
 
 [testenv]
+package = wheel
+wheel_build_env = .pkg
 depends = lint
-commands = {envpython} -b -m pytest {posargs}
+commands = {env_python} -b -m pytest {posargs}
 extras = test
 set_env =
   PYTHONWARNDEFAULTENCODING = 1

src/wheel/bdist_wheel.py

@@ -238,7 +238,7 @@ def finalize_options(self):
         try:
             self.compression = self.supported_compressions[self.compression]
         except KeyError:
-            raise ValueError(f"Unsupported compression: {self.compression}")
+            raise ValueError(f"Unsupported compression: {self.compression}") from None
 
         need_options = ("dist_dir", "plat_name", "skip_build")
 

src/wheel/wheelfile.py

@@ -62,7 +62,7 @@ def __init__(self, file, mode="r", compression=ZIP_DEFLATED):
             try:
                 record = self.open(self.record_path)
             except KeyError:
-                raise WheelError(f"Missing {self.record_path} file")
+                raise WheelError(f"Missing {self.record_path} file") from None
 
             with record:
                 for line in csv.reader(
@@ -76,7 +76,9 @@ def __init__(self, file, mode="r", compression=ZIP_DEFLATED):
                     try:
                         hashlib.new(algorithm)
                     except ValueError:
-                        raise WheelError(f"Unsupported hash algorithm: {algorithm}")
+                        raise WheelError(
+                            f"Unsupported hash algorithm: {algorithm}"
+                        ) from None
 
                     if algorithm.lower() in {"md5", "sha1"}:
                         raise WheelError(