Ban macOS 11+ minor tags not supported by pip, packaging nor uv

See pypa/packaging.python.org#1933

When macOS switched to a versioning scheme incrementing the major version with macOS 11, packaging and subsequently pip and uv decided to only emit tags with the minor version 0 for macOS 11+ (since we don't know how many minors each version has). PyPI doesn't currently enforce this requirement, to the confusion of users who upload wheels that are ultimately not usuable (astral-sh/uv#16337). This PR bans uploads of those wheels, enforcing a minor version of 0 for macOS 11+.

Matching implementations in pip and uv:

https://github.com/pypa/packaging/blob/a85e63daecba56bbb829492624a844d306053504/src/packaging/tags.py#L452-L460

https://github.com/astral-sh/uv/blob/64bcd4e8a6ad629fa9ffc2922b4cc0cd57cb8dbe/crates/uv-platform-tags/src/tags.rs#L528-L538

(Pending DPO thread)

Author: konstin

tests/unit/forklift/test_legacy.py

@@ -2843,7 +2843,7 @@ def test_upload_attestation_fails_without_oidc_publisher(
             "macosx_10_13_x86_64",
             "macosx_11_0_x86_64",
             "macosx_10_15_arm64",
-            "macosx_11_10_universal2",
+            "macosx_15_0_universal2",
             "ios_13_0_arm64_iphoneos",
             "ios_13_0_arm64_iphonesimulator",
             "ios_13_0_x86_64_iphonesimulator",
@@ -3408,6 +3408,7 @@ def test_upload_fails_with_invalid_filename(
             "linux_x86_64",
             "linux_x86_64.win32",
             "macosx_9_2_x86_64",
+            "macosx_11_2_arm64",
             "macosx_16_2_arm64",
             "macosx_10_15_amd64",
         ],

warehouse/forklift/legacy.py

@@ -119,7 +119,7 @@
     "linux_armv7l",
 }
 # macosx is a little more complicated:
-_macosx_platform_re = re.compile(r"macosx_(?P<major>\d+)_(\d+)_(?P<arch>.*)")
+_macosx_platform_re = re.compile(r"macosx_(?P<major>\d+)_(?P<minor>\d+)_(?P<arch>.*)")
 _macosx_arches = {
     "ppc",
     "ppc64",
@@ -133,8 +133,8 @@
     "universal",
     "universal2",
 }
+# macosx 10 is also supported, but with different rules
 _macosx_major_versions = {
-    "10",
     "11",
     "12",
     "13",
@@ -178,9 +178,17 @@ def _valid_platform_tag(platform_tag):
     if platform_tag in _allowed_platforms:
         return True
     m = _macosx_platform_re.match(platform_tag)
+    # https://github.com/pypa/packaging.python.org/issues/1933
+    # There's two macosx formats: `macosx_10_{minor}` for the 10.x series where
+    # only the minor version ever increased, and `macosx_{major}_0` for the
+    # new release scheme where we don't know how many minor versions each
+    # release has.
+    if m and m.group("major") == "10" and m.group("arch") in _macosx_arches:
+        return True
     if (
         m
         and m.group("major") in _macosx_major_versions
+        and m.group("minor") == "0"
         and m.group("arch") in _macosx_arches
     ):
         return True