+# We use preview style for formatting Black itself. If you
+# want stable formatting across releases, you should keep
+# this off.
+preview = true
+
+# Build system information and other project-specific configuration below.
+# NOTE: You don't need this in your own Black configuration.
+
+[build-system]
+requires = ["setuptools>=45.0", "setuptools_scm[toml]>=6.3.1", "wheel"]
+build-backend = "setuptools.build_meta"
+
+[tool.cibuildwheel]
+build-verbosity = 1
+# So these are the environments we target:
+# - Python: CPython 3.6+ only
+# - Architecture (64-bit only): amd64 / x86_64, universal2, and arm64
+# - OS: Linux (no musl), Windows, and macOS
+build = "cp3*-*"
+skip = ["*-manylinux_i686", "*-musllinux_*", "*-win32", "pp-*"]
+before-build = ["pip install -r .github/mypyc-requirements.txt"]
+# This is the bare minimum needed to run the test suite. Pulling in the full
+# test_requirements.txt would download a bunch of other packages not necessary
+# here and would slow down the testing step a fair bit.
+test-requires = ["pytest>=6.1.1"]
+test-command = 'pytest {project} -k "not incompatible_with_mypyc"'
+test-extras = ["d"," jupyter"]
+# Skip trying to test arm64 builds on Intel Macs. (so cross-compilation doesn't
+# straight up crash)
+test-skip = ["*-macosx_arm64", "*-macosx_universal2:arm64"]
+
+[tool.cibuildwheel.environment]
+BLACK_USE_MYPYC = "1"
+MYPYC_OPT_LEVEL = "3"
+MYPYC_DEBUG_LEVEL = "0"
+# The dependencies required to build wheels with mypyc aren't specified in
+# [build-system].requires so we'll have to manage the build environment ourselves.
+PIP_NO_BUILD_ISOLATION = "no"
+
+[tool.cibuildwheel.linux]
+before-build = [
+ "pip install -r .github/mypyc-requirements.txt",
+ "yum install -y clang",
+]
+# Newer images break the builds, not sure why. We'll need to investigate more later.
+manylinux-x86_64-image = "quay.io/pypa/manylinux2014_x86_64:2021-11-20-f410d11"
+
+[tool.cibuildwheel.linux.environment]
+BLACK_USE_MYPYC = "1"
+MYPYC_OPT_LEVEL = "3"
+MYPYC_DEBUG_LEVEL = "0"
+PIP_NO_BUILD_ISOLATION = "no"
+# Black needs Clang to compile successfully on Linux.
+CC = "clang"
+
+[tool.cibuildwheel.windows]
+# For some reason, (compiled) mypyc is failing to start up with "ImportError: DLL load
+# failed: A dynamic link library (DLL) initialization routine failed." on Windows for
+# at least 3.6. Let's just use interpreted mypy[c].
+# See also: https://github.com/mypyc/mypyc/issues/819.
+before-build = [
+ "pip install -r .github/mypyc-requirements.txt --no-binary mypy"
+]
+
+[tool.isort]
+atomic = true
+profile = "black"
+line_length = 88
+skip_gitignore = true
+skip_glob = ["src/blib2to3", "tests/data", "profiling"]
+known_first_party = ["black", "blib2to3", "blackd", "_black_version"]
+
+[tool.pytest.ini_options]
+# Option below requires `tests/optional.py`
+addopts = "--strict-config --strict-markers"
+optional-tests = [
+ "no_blackd: run when `d` extra NOT installed",
+ "no_jupyter: run when `jupyter` extra NOT installed",
+]
+markers = [
+ "incompatible_with_mypyc: run when testing mypyc compiled black"
+]
+xfail_strict = true
+filterwarnings = [
+ "error",
+ # this is mitigated by a try/catch in https://github.com/psf/black/pull/2974/
+ # this ignore can be removed when support for aiohttp 3.7 is dropped.
+ '''ignore:Decorator `@unittest_run_loop` is no longer needed in aiohttp 3\.8\+:DeprecationWarning''',
+ # this is mitigated by https://github.com/python/cpython/issues/79071 in python 3.8+
+ # this ignore can be removed when support for 3.7 is dropped.
+ '''ignore:Bare functions are deprecated, use async ones:DeprecationWarning''',
+]