Vendor a copy of strenum until packaging is fixed

archinfo/_strenum.py

@@ -0,0 +1,52 @@
+"""
+This file is copied from here: https://github.com/clbarnes/backports.strenum/blob/main/backports/strenum/strenum.py
+It is licensed under the Python Software Foundation License Version 2.
+
+This file should be replaced with backports.strenum once its packaging issues
+are resolved. See here: https://github.com/clbarnes/backports.strenum/issues/9
+Alternatively, if archifo is sooner updated to Python 3.11, this file can be
+removed and replaced with the standard library version.
+"""
+import sys
+from enum import Enum
+from typing import Any, List, Type, TypeVar
+
+if sys.version_info <= (3, 11):
+    _S = TypeVar("_S", bound="StrEnum")
+
+    class StrEnum(str, Enum):
+        """
+        Enum where members are also (and must be) strings
+        """
+
+        def __new__(cls: Type[_S], *values: str) -> _S:
+            if len(values) > 3:
+                raise TypeError(f"too many arguments for str(): {values!r}")
+            if len(values) == 1:
+                # it must be a string
+                if not isinstance(values[0], str):
+                    raise TypeError(f"{values[0]!r} is not a string")
+            if len(values) >= 2:
+                # check that encoding argument is a string
+                if not isinstance(values[1], str):
+                    raise TypeError(f"encoding must be a string, not {values[1]!r}")
+            if len(values) == 3:
+                # check that errors argument is a string
+                if not isinstance(values[2], str):
+                    raise TypeError("errors must be a string, not %r" % (values[2]))
+            value = str(*values)
+            member = str.__new__(cls, value)
+            member._value_ = value
+            return member
+
+        __str__ = str.__str__
+
+        @staticmethod
+        def _generate_next_value_(name: str, start: int, count: int, last_values: List[Any]) -> str:
+            """
+            Return the lower-cased version of the member name.
+            """
+            return name.lower()
+
+else:
+    from enum import StrEnum

archinfo/types.py

@@ -1,10 +1,6 @@
-import sys
 from typing import NewType
 
-if sys.version_info >= (3, 11):
-    from enum import StrEnum
-else:
-    from backports.strenum import StrEnum
+from ._strenum import StrEnum
 
 
 class RegisterOffset(int):

setup.cfg

@@ -18,8 +18,6 @@ classifiers =
 
 [options]
 packages = find:
-install_requires =
-    backports.strenum;python_version<'3.11'
 python_requires = >=3.8
 
 [options.extras_require]