Fix mypy linting errors

Author: sirosen

src/check_jsonschema/cli/param_types.py

@@ -141,11 +141,16 @@ def __init__(
 class LazyBinaryReadFile(click.File):
     def convert(
         self,
-        value: str,
+        value: str | os.PathLike[str] | t.IO[t.Any],
         param: click.Parameter | None,
         ctx: click.Context | None,
     ) -> t.IO[bytes]:
-        lf = _CustomLazyFile(value, mode="rb")
+        if hasattr(value, "read") or hasattr(value, "write"):
+            return t.cast(t.IO[bytes], value)
+
+        value_: str | os.PathLike[str] = t.cast("str | os.PathLike[str]", value)
+
+        lf = _CustomLazyFile(value_, mode="rb")
         if ctx is not None:
             ctx.call_on_close(lf.close_intelligently)
         return t.cast(t.IO[bytes], lf)

src/check_jsonschema/schema_loader/readers.py

@@ -49,7 +49,7 @@ def _read_impl(self) -> t.Any:
     def read_schema(self) -> dict:
         if self._parsed_schema is _UNSET:
             self._parsed_schema = _run_load_callback(self.filename, self._read_impl)
-        return self._parsed_schema
+        return t.cast(dict, self._parsed_schema)
 
 
 class StdinSchemaReader:
@@ -66,7 +66,7 @@ def read_schema(self) -> dict:
                 self._parsed_schema = json.load(sys.stdin)
             except ValueError as e:
                 raise ParseError("Failed to parse JSON from stdin") from e
-        return self._parsed_schema
+        return t.cast(dict, self._parsed_schema)
 
 
 class HttpSchemaReader:
@@ -101,4 +101,4 @@ def _read_impl(self) -> t.Any:
     def read_schema(self) -> dict:
         if self._parsed_schema is _UNSET:
             self._parsed_schema = _run_load_callback(self.url, self._read_impl)
-        return self._parsed_schema
+        return t.cast(dict, self._parsed_schema)

tox.ini

@@ -46,12 +46,10 @@ commands = coverage report --skip-covered
 
 [testenv:mypy]
 description = "check type annotations with mypy"
-# temporarily pin back click until either click 8.1.5 releases or mypy fixes the issue
-# with referential integrity of type aliases
 deps = mypy
        types-jsonschema
        types-requests
-       click==8.1.3
+       click
 commands = mypy src/ {posargs}
 
 [testenv:pyright]