Skip invalid versions on PyPI

CHANGELOG.md

@@ -6,6 +6,18 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## Unreleased
 
+## [0.2.2] - 2023/03/04
+
+### Fixed
+
+- When there is an invalid version on PyPi (defined as unparsable
+  by [`packaging.version.Version`](https://packaging.pypa.io/en/stable/version.html))
+  that version is now skipped. Otherwise a single invalid version would
+  make the package uninstallable, following removal of `LegacyVersion` in
+  [packaging#407](https://github.com/pypa/packaging/pull/407).
+
+### Fixed
+
 ## [0.2.1] - 2023/02/20
 
 ### Changed

micropip/_micropip.py

@@ -23,7 +23,7 @@
 from packaging.requirements import Requirement
 from packaging.tags import Tag, sys_tags
 from packaging.utils import canonicalize_name, parse_wheel_filename
-from packaging.version import Version
+from packaging.version import InvalidVersion, Version
 
 from . import _mock_package
 from ._compat import (
@@ -268,7 +268,17 @@ def find_wheel(metadata: dict[str, Any], req: Requirement) -> WheelInfo:
     ver : Version or None
         The version of the Python wheel, or None if there is no pure Python wheel.
     """
-    releases = metadata.get("releases", {})
+    releases_raw = metadata.get("releases", {})
+    releases = {}
+    # Skip unparsable versions
+    for key, val in releases_raw.items():
+        try:
+            Version(key)
+        except InvalidVersion:
+            continue
+
+        releases[key] = val
+
     candidate_versions = sorted(
         (Version(v) for v in req.specifier.filter(releases)),
         reverse=True,

tests/test_micropip.py

@@ -539,6 +539,27 @@ def test_last_version_from_pypi():
     assert str(wheel.version) == "0.15.5"
 
 
+def test_find_wheel_invalid_version():
+    """Check that if the one version on PyPi is unparsable
+
+    it should be skipped instead of producing an error
+    """
+    pytest.importorskip("packaging")
+    from packaging.requirements import Requirement
+
+    from micropip._micropip import find_wheel
+
+    requirement = Requirement("dummy_module")
+    versions = ["0.0.1", "0.15.5", "0.9.1", "2004d"]
+
+    metadata = _pypi_metadata("dummy_module", {v: ["py3"] for v in versions})
+
+    # get version number from find_wheel
+    wheel = find_wheel(metadata, requirement)
+
+    assert str(wheel.version) == "0.15.5"
+
+
 _best_tag_test_cases = (
     "package, version, incompatible_tags, compatible_tags",
     # Tests assume that `compatible_tags` is sorted from least to most compatible: