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# Copyright (c) Meta Platforms, Inc. and affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
import re
import sys
from pathlib import Path
from subprocess import run
from typing import Iterable, List, Pattern
# Use the copyright header from this file as the benchmark for all files
EXPECTED_HEADER: str = "\n".join(
line for line in Path(__file__).read_text().splitlines()[:4]
)
EXCEPTION_PATTERNS: List[Pattern[str]] = [
re.compile(pattern)
for pattern in (
r"^native/libcst/tests/fixtures/",
r"^libcst/_add_slots\.py$",
r"^libcst/tests/test_(e2e|fuzz)\.py$",
r"^libcst/_parser/base_parser\.py$",
r"^libcst/_parser/parso/utils\.py$",
r"^libcst/_parser/parso/pgen2/(generator|grammar_parser)\.py$",
r"^libcst/_parser/parso/python/(py_token|tokenize)\.py$",
r"^libcst/_parser/parso/tests/test_(fstring|tokenize|utils)\.py$",
)
]
def tracked_files() -> Iterable[Path]:
proc = run(
["git", "ls-tree", "-r", "--name-only", "HEAD"],
check=True,
capture_output=True,
encoding="utf-8",
)
yield from (
path
for line in proc.stdout.splitlines()
if not any(pattern.search(line) for pattern in EXCEPTION_PATTERNS)
if (path := Path(line)) and path.is_file() and path.suffix in (".py", ".sh")
)
def main() -> None:
error = False
for path in tracked_files():
content = path.read_text("utf-8")
if EXPECTED_HEADER not in content:
print(f"Missing or incomplete copyright in {path}")
error = True
sys.exit(1 if error else 0)
if __name__ == "__main__":
main()
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