Use setuptools.find_packages in setup (#2363)

* Use setuptools.find_packages in setup

* Address mypy errors

setup.py

@@ -1,5 +1,5 @@
 # Copyright (C) 2020 Łukasz Langa
-from setuptools import setup
+from setuptools import setup, find_packages
 import sys
 import os
 
@@ -62,7 +62,7 @@ def get_long_description() -> str:
     license="MIT",
     py_modules=["_black_version"],
     ext_modules=ext_modules,
-    packages=["blackd", "black", "blib2to3", "blib2to3.pgen2", "black_primer"],
+    packages=find_packages(where="src"),
     package_dir={"": "src"},
     package_data={
         "blib2to3": ["*.txt"],

src/black_primer/cli.py

@@ -7,7 +7,7 @@
 from pathlib import Path
 from shutil import rmtree, which
 from tempfile import gettempdir
-from typing import Any, Union
+from typing import Any, Union, Optional
 
 import click
 
@@ -29,8 +29,8 @@
 
 
 def _handle_debug(
-    ctx: click.core.Context,
-    param: Union[click.core.Option, click.core.Parameter],
+    ctx: Optional[click.core.Context],
+    param: Optional[Union[click.core.Option, click.core.Parameter]],
     debug: Union[bool, int, str],
 ) -> Union[bool, int, str]:
     """Turn on debugging if asked otherwise INFO default"""

tests/test_primer.py

@@ -189,7 +189,7 @@ def test_process_queue(self, mock_stdout: Mock) -> None:
         with patch("black_primer.lib.git_checkout_or_rebase", return_false):
             with TemporaryDirectory() as td:
                 return_val = loop.run_until_complete(
-                    lib.process_queue(str(config_path), td, 2)
+                    lib.process_queue(str(config_path), Path(td), 2)
                 )
                 self.assertEqual(0, return_val)
 
@@ -210,7 +210,7 @@ def test_async_main(self) -> None:
             "no_diff": False,
         }
         with patch("black_primer.cli.lib.process_queue", return_zero):
-            return_val = loop.run_until_complete(cli.async_main(**args))
+            return_val = loop.run_until_complete(cli.async_main(**args))  # type: ignore
             self.assertEqual(0, return_val)
 
     def test_handle_debug(self) -> None: