mirror of
https://github.com/carbon-language/carbon-lang.git
synced 2026-10-04 20:31:10 +01:00
78 lines
2.2 KiB
Python
Executable File
78 lines
2.2 KiB
Python
Executable File
#!/usr/bin/env python3
|
|
|
|
"""Detects and prevents dependencies on LLVM's googletest.
|
|
|
|
Carbon uses googletest directly, and it's a significantly more recent version
|
|
than is provided by LLVM. Using both versions in the same binary leads to
|
|
problems, so this detects dependencies.
|
|
|
|
We also have some dependency checking at //bazel/check_deps. This is a separate
|
|
script because check_deps relies on being able to validate specific binaries
|
|
which change infrequently, whereas this effectively monitors all cc_test rules,
|
|
the set of which is expected to be altered more often.
|
|
"""
|
|
|
|
__copyright__ = """
|
|
Part of the Carbon Language project, under the Apache License v2.0 with LLVM
|
|
Exceptions. See /LICENSE for license information.
|
|
SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
"""
|
|
|
|
import os
|
|
import shutil
|
|
import subprocess
|
|
from pathlib import Path
|
|
|
|
_MESSAGE = """\
|
|
Dependencies on @llvm-project//llvm:gtest are forbidden, but a dependency path
|
|
was detected:
|
|
|
|
%s
|
|
Carbon uses GoogleTest through @com_google_googletest, which is a different
|
|
version than LLVM uses at @llvm-project//llvm:gtest. As a consequence,
|
|
dependencies on @llvm-project//llvm:gtest must be avoided.
|
|
"""
|
|
|
|
|
|
def locate_bazel() -> str:
|
|
"""Returns the bazel command.
|
|
|
|
We use the `BAZEL` environment variable if present. If not, then we try to
|
|
use `bazelisk` and then `bazel`.
|
|
"""
|
|
bazel = os.environ.get("BAZEL")
|
|
if bazel:
|
|
return bazel
|
|
|
|
if shutil.which("bazelisk"):
|
|
return "bazelisk"
|
|
|
|
if shutil.which("bazel"):
|
|
return "bazel"
|
|
|
|
exit("Unable to run Bazel")
|
|
|
|
|
|
def main() -> None:
|
|
# Change the working directory to the repository root so that the remaining
|
|
# operations reliably operate relative to that root.
|
|
os.chdir(Path(__file__).parent.parent)
|
|
args = [
|
|
locate_bazel(),
|
|
"query",
|
|
"somepath(//..., @llvm-project//llvm:gtest)",
|
|
]
|
|
p = subprocess.run(
|
|
args, stdout=subprocess.PIPE, stderr=subprocess.PIPE, encoding="utf-8"
|
|
)
|
|
if p.returncode != 0:
|
|
print(p.stderr)
|
|
exit(f"bazel query returned {p.returncode}")
|
|
if p.stdout:
|
|
exit(_MESSAGE % p.stdout)
|
|
print("Done!")
|
|
|
|
|
|
if __name__ == "__main__":
|
|
main()
|