Add pyright to pre-commit config

Also configure reorder-python-imports to add annotations import
everywhere.

.pre-commit-config.yaml

@@ -17,6 +17,8 @@ repos:
       - id: reorder-python-imports
         args:
           - --py38-plus
+          - --add-import
+          - from __future__ import annotations
 
   - repo: https://github.com/charliermarsh/ruff-pre-commit
     rev: v0.0.269
@@ -46,3 +48,8 @@ repos:
     rev: v0.13
     hooks:
       - id: validate-pyproject
+
+  - repo: https://github.com/fsouza/mirrors-pyright
+    rev: v1.1.310
+    hooks:
+      - id: pyright

test_autoflake.py

@@ -1,5 +1,7 @@
 #!/usr/bin/env python
 """Test suite for autoflake."""
+from __future__ import annotations
+
 import contextlib
 import functools
 import io

test_fuzz.py

@@ -5,6 +5,8 @@
 done by doing a syntax check after the autoflake run. The number of
 Pyflakes warnings is also confirmed to always improve.
 """
+from __future__ import annotations
+
 import argparse
 import os
 import shlex

test_fuzz_pypi.py

@@ -1,10 +1,13 @@
 #!/usr/bin/env python
 """Fuzz test against the latest packages on PyPI."""
+from __future__ import annotations
+
 import os
 import subprocess
 import sys
 import tarfile
 import zipfile
+from typing import Iterable
 
 import test_fuzz
 
@@ -15,7 +18,7 @@
 )
 
 
-def latest_packages(last_hours):
+def latest_packages(last_hours: int) -> Iterable[str]:
     """Return names of latest released packages on PyPI."""
     process = subprocess.Popen(
         ["yolk", f"--latest-releases={last_hours}"],
@@ -27,7 +30,7 @@ def latest_packages(last_hours):
             yield line.split()[0]
 
 
-def download_package(name, output_directory):
+def download_package(name: str, output_directory: str) -> None:
     """Download package to output_directory.
 
     Raise CalledProcessError on failure.
@@ -38,7 +41,7 @@ def download_package(name, output_directory):
     )
 
 
-def extract_package(path, output_directory):
+def extract_package(path: str, output_directory: str) -> bool:
     """Extract package at path."""
     if path.lower().endswith(".tar.gz"):
         try:
@@ -60,7 +63,7 @@ def extract_package(path, output_directory):
     return False
 
 
-def main():
+def main() -> int:
     """Run main."""
     try:
         os.mkdir(TMP_DIR)
@@ -138,6 +141,8 @@ def main():
             file=sys.stderr,
         )
 
+    return 0
+
 
 if __name__ == "__main__":
     try: