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# pylint: skip-file

# type: ignore

# -*- coding: utf-8 -*-

#

# Copyright 2025 Google LLC

#

# Licensed under the Apache License, Version 2.0 (the "License");

# you may not use this file except in compliance with the License.

# You may obtain a copy of the License at

#

# https://www.apache.org/licenses/LICENSE-2.0

#

# Unless required by applicable law or agreed to in writing, software

# distributed under the License is distributed on an "AS IS" BASIS,

# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

# See the License for the specific language governing permissions and

# limitations under the License.

import os

import pathlib

import subprocess

import nox

DEFAULT_PYTHON_VERSION = '3.10'

CURRENT_DIRECTORY = pathlib.Path(__file__).parent.absolute()

nox.options.sessions = [

'format',

]

# Error if a python version is missing

nox.options.error_on_missing_interpreters = True

@nox.session(python=DEFAULT_PYTHON_VERSION)

def format(session) -> None:

"""Format Python code using autoflake, pyupgrade, and ruff."""

# Sort Spelling Allowlist

spelling_allow_file = '.github/actions/spelling/allow.txt'

with open(spelling_allow_file, encoding='utf-8') as file:

unique_words = sorted(set(file))

with open(spelling_allow_file, 'w', encoding='utf-8') as file:

file.writelines(unique_words)

format_all = False

if format_all:

lint_paths_py = ['.']

else:

target_branch = 'origin/main'

unstaged_files = subprocess.run(

[

'git',

'diff',

'--name-only',

'--diff-filter=ACMRTUXB',

target_branch,

],

stdout=subprocess.PIPE,

text=True,

check=False,

).stdout.splitlines()

staged_files = subprocess.run(

[

'git',

'diff',

'--cached',

'--name-only',

'--diff-filter=ACMRTUXB',

target_branch,

],

stdout=subprocess.PIPE,

text=True,

check=False,

).stdout.splitlines()

committed_files = subprocess.run(

[

'git',

'diff',

'HEAD',

target_branch,

'--name-only',

'--diff-filter=ACMRTUXB',

],

stdout=subprocess.PIPE,

text=True,

check=False,

).stdout.splitlines()

changed_files = sorted(

{

file

for file in (unstaged_files + staged_files + committed_files)

if os.path.isfile(file)

}

)

lint_paths_py = [

f for f in changed_files if f.endswith('.py') and 'grpc/' not in f

]

if not lint_paths_py:

session.log('No changed Python files to lint.')

return

session.install(

'types-requests',

'types-protobuf',

'pyupgrade',

'autoflake',

'ruff',

'no_implicit_optional',

)

if lint_paths_py:

session.run(

'no_implicit_optional',

'--use-union-or',

*lint_paths_py,

)

if not format_all:

session.run(

'pyupgrade',

'--exit-zero-even-if-changed',

'--py310-plus',

*lint_paths_py,

)

session.run(

'autoflake',

'-i',

'-r',

'--remove-all-unused-imports',

*lint_paths_py,

)

session.run(

'ruff',

'check',

'--fix-only',

*lint_paths_py,

)

session.run(

'ruff',

'format',

*lint_paths_py,

)