88 lines
2.8 KiB
Python
88 lines
2.8 KiB
Python
#!/usr/bin/env python3
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#
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# Copyright (c) 2026 Huawei Technologies Co., Ltd. All Rights Reserved.
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# Copyright 2023 The vLLM team.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# This file is a part of the vllm-ascend project.
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# Adapted from https://github.com/vllm-project/vllm/tree/main/tools
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#
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"""Lint: detect `with a() and b():` (boolean op in with-statement context).
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Using `and`/`or` to combine context managers is almost always a bug:
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with ctx_a() and ctx_b(): # BUG: only ctx_b is entered
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with ctx_a() or ctx_b(): # BUG: only ctx_a is entered
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The correct way to combine context managers is:
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with ctx_a(), ctx_b(): # comma-separated
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with (ctx_a(), ctx_b()): # parenthesized (Python 3.10+)
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with contextlib.ExitStack() ... # ExitStack
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"""
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import ast
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import sys
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def check_file(filepath: str) -> list[str]:
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try:
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with open(filepath, encoding="utf-8") as f:
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source = f.read()
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except (OSError, UnicodeDecodeError):
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return []
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try:
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tree = ast.parse(source, filename=filepath)
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except SyntaxError:
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return []
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violations = []
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for node in ast.walk(tree):
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if isinstance(node, (ast.With, ast.AsyncWith)):
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for item in node.items:
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if isinstance(item.context_expr, ast.BoolOp):
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op = "and" if isinstance(item.context_expr.op, ast.And) else "or"
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violations.append(
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f"{filepath}:{item.context_expr.lineno}: "
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f"boolean `{op}` used to combine context managers "
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"in `with` statement; use a comma instead"
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)
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return violations
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def main() -> int:
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if len(sys.argv) < 2:
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print("Usage: check_boolean_context_manager.py <file> ...", file=sys.stderr)
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return 1
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all_violations = []
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for filepath in sys.argv[1:]:
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all_violations.extend(check_file(filepath))
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if all_violations:
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print(
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"Boolean operator used to combine context managers in a `with` "
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"statement.\n"
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"Use `with a(), b():` or `with (a(), b()):` instead.\n"
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)
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for violation in all_violations:
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print(f" {violation}")
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return 1
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return 0
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if __name__ == "__main__":
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sys.exit(main())
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