Restore setup.cfg (no guarantees)

Makefile

@@ -10,7 +10,7 @@ tar: yt-dlp.tar.gz
 # intended use: when building a source distribution,
 # make pypi-files && python3 -m build -sn .
 pypi-files: AUTHORS Changelog.md LICENSE README.md README.txt supportedsites \
-            completions yt-dlp.1 pyproject.toml devscripts/* test/*
+            completions yt-dlp.1 pyproject.toml setup.cfg devscripts/* test/*
 
 .PHONY: all clean clean-all clean-test clean-dist clean-cache \
         completions completion-bash completion-fish completion-zsh \
@@ -158,7 +158,7 @@ yt-dlp.tar.gz: all
 		README.md supportedsites.md Changelog.md LICENSE \
 		CONTRIBUTING.md Collaborators.md CONTRIBUTORS AUTHORS \
 		Makefile yt-dlp.1 README.txt completions .gitignore \
-		yt-dlp yt_dlp pyproject.toml devscripts test
+		setup.cfg yt-dlp yt_dlp pyproject.toml devscripts test
 
 AUTHORS: Changelog.md
 	@if [ -d '.git' ] && command -v git > /dev/null ; then \

setup.cfg

@@ -0,0 +1,39 @@
+[flake8]
+exclude = build,venv,.tox,.git,.pytest_cache
+ignore = E402,E501,E731,E741,W503
+max_line_length = 120
+per_file_ignores =
+    devscripts/lazy_load_template.py: F401
+
+
+[autoflake]
+ignore-init-module-imports = true
+ignore-pass-after-docstring = true
+remove-all-unused-imports = true
+remove-duplicate-keys = true
+remove-unused-variables = true
+
+
+[tox:tox]
+skipsdist = true
+envlist = py{38,39,310,311,312},pypy{38,39,310}
+skip_missing_interpreters = true
+
+[testenv]  # tox
+deps =
+    pytest
+commands = pytest {posargs:"-m not download"}
+passenv = HOME  # For test_compat_expanduser
+setenv =
+    # PYTHONWARNINGS = error  # Catches PIP's warnings too
+
+
+[isort]
+py_version = 38
+multi_line_output = VERTICAL_HANGING_INDENT
+line_length = 80
+reverse_relative = true
+ensure_newline_before_comments = true
+include_trailing_comma = true
+known_first_party =
+    test