[pre-commit.ci] pre-commit autoupdate (#209)

* [pre-commit.ci] pre-commit autoupdate

updates:
- [github.com/asottile/pyupgrade: v2.34.0 → v2.37.1](asottile/pyupgrade@v2.34.0...v2.37.1)

* add ci clause

* fix package metadata

* forward ref on hint

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: Talley Lambert <talley.lambert@gmail.com>

.pre-commit-config.yaml

@@ -1,4 +1,10 @@
+ci:
+  autoupdate_schedule: monthly
+  autofix_commit_msg: "style: [pre-commit.ci] auto fixes [...]"
+  autoupdate_commit_msg: "ci: [pre-commit.ci] autoupdate"
+
 exclude: _docs/example_plugin/some_module.py
+
 repos:
   - repo: https://github.com/pre-commit/pre-commit-hooks
     rev: v4.3.0
@@ -32,7 +38,7 @@ repos:
     hooks:
       - id: black
   - repo: https://github.com/asottile/pyupgrade
-    rev: v2.34.0
+    rev: v2.37.1
     hooks:
       - id: pyupgrade
         args: [--py38-plus, --keep-runtime-typing]

npe2/manifest/_package_metadata.py

@@ -1,12 +1,9 @@
-from importlib.metadata import metadata
-from typing import TYPE_CHECKING, Dict, List, Literal, Optional, Union
+from importlib import metadata
+from typing import Dict, List, Literal, Optional, Union
 
 from pydantic import BaseModel, Extra, Field, constr, root_validator
 from pydantic.fields import SHAPE_LIST
 
-if TYPE_CHECKING:
-    import email.message
-
 # https://packaging.python.org/specifications/core-metadata/
 
 MetadataVersion = Literal["1.0", "1.1", "1.2", "2.0", "2.1", "2.2"]
@@ -184,14 +181,21 @@ def _validate_root(cls, values):
     @classmethod
     def for_package(cls, name: str) -> "PackageMetadata":
         """Get PackageMetadata from a package name."""
-        return cls.from_dist_metadata(metadata(name))
+        return cls.from_dist_metadata(metadata.metadata(name))
 
+    # note, the metadata.PackageMetadata hint is only valid for py 3.10
+    # before that, it was email.message.Message
     @classmethod
-    def from_dist_metadata(cls, meta: "email.message.Message") -> "PackageMetadata":
-        """Accepts importlib.metadata.Distribution.metadata"""
+    def from_dist_metadata(cls, meta: "metadata.PackageMetadata") -> "PackageMetadata":
+        """Generate PackageMetadata from importlib.metadata.PackageMetdata."""
         manys = [f.name for f in cls.__fields__.values() if f.shape == SHAPE_LIST]
         d: Dict[str, Union[str, List[str]]] = {}
-        for key, value in meta.items():
+        # looks like py3.10 changed the public protocol of metadata.PackageMetadata
+        # and they don't want you to rely on the Mapping interface... however, the
+        # __iter__ method doesn't iterate key value pairs, just keys, and I can't figure
+        # out how to get multi-valued fields from that (e.g. Classifier)
+        # might need to change this in the future
+        for key, value in meta.items():  # type: ignore
             key = _norm(key)
             if key in manys:
                 d.setdefault(key, []).append(value)  # type: ignore