pyproject.toml: add black & isort & mypy settings

This should help stabilize the tool behavior for different developers.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

2 files changed, 45 insertions, 1 deletions

diff --git a/lddtree.py b/lddtree.py
index b1fef16..3a41886 100755
--- a/lddtree.py
+++ b/lddtree.py
@@ -49,7 +49,8 @@ import os
 import re
 import shutil
 import sys
-from typing import Any, Dict, Iterable, List, Optional, Tuple, Union, cast
+from typing import Any, cast, Dict, Iterable, List, Optional, Tuple, Union
+
 
 assert sys.version_info >= (3, 8), f"Python 3.8+ required, but found {sys.version}"
 
@@ -63,6 +64,7 @@ except ImportError:
 from elftools.common import exceptions  # type: ignore
 from elftools.elf.elffile import ELFFile  # type: ignore
 
+
 # pylint: enable=import-error
 
 
diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..ab0fde0
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,42 @@
+# Copyright 2024 Gentoo Foundation
+# Copyright 2024 Mike Frysinger <vapier@gentoo.org>
+# Copyright 2024 The ChromiumOS Authors
+# Distributed under the terms of the GNU General Public License v2
+
+# https://packaging.python.org/en/latest/guides/writing-pyproject-toml/
+
+
+# https://black.readthedocs.io/en/stable/usage_and_configuration/the_basics.html
+[tool.black]
+line-length = 88
+target-version = ["py38"]
+
+
+# https://pycqa.github.io/isort/docs/configuration/options
+[tool.isort]
+py_version = "38"
+
+# Be compatible with `black` since it also matches what we want.
+profile = "black"
+
+line_length = 88
+length_sort = false
+force_single_line = true
+lines_after_imports = 2
+from_first = false
+case_sensitive = false
+force_sort_within_sections = true
+order_by_type = false
+
+# Allow importing multiple classes on a single line from these modules.
+# https://google.github.io/styleguide/pyguide#s2.2-imports
+single_line_exclusions = [
+	"abc",
+	"collections.abc",
+	"typing",
+]
+
+
+# https://mypy.readthedocs.io/en/stable/config_file.html
+[tool.mypy]
+python_version = "3.8"