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#!/usr/bin/env python3
# Some systems don't have `python3` in their PATH. This isn't supported by x.py directly;
# they should use `x` or `x.ps1` instead.
# This file is only a "symlink" to bootstrap.py, all logic should go there.
# Parts of `bootstrap.py` use the `multiprocessing` module, so this entry point
# must use the normal `if __name__ == '__main__':` convention to avoid problems.
if __name__ == '__main__':
import os
import sys
import warnings
from inspect import cleandoc
major = sys.version_info.major
minor = sys.version_info.minor
# If this is python2, check if python3 is available and re-execute with that
# interpreter. Only python3 allows downloading CI LLVM.
#
# This matters if someone's system `python` is python2.
if major < 3:
try:
os.execvp("py", ["py", "-3"] + sys.argv)
except OSError:
try:
os.execvp("python3", ["python3"] + sys.argv)
except OSError:
# Python 3 isn't available, fall back to python 2
pass
# soft deprecation of old python versions
skip_check = os.environ.get("RUST_IGNORE_OLD_PYTHON") == "1"
if not skip_check and (major < 3 or (major == 3 and minor < 6)):
msg = cleandoc("""
Using python {}.{} but >= 3.6 is recommended. Your python version
should continue to work for the near future, but this will
eventually change. If python >= 3.6 is not available on your system,
please file an issue to help us understand timelines.
This message can be suppressed by setting `RUST_IGNORE_OLD_PYTHON=1`
""".format(major, minor))
warnings.warn(msg, stacklevel=1)
rust_dir = os.path.dirname(os.path.abspath(__file__))
# For the import below, have Python search in src/bootstrap first.
sys.path.insert(0, os.path.join(rust_dir, "src", "bootstrap"))
import bootstrap
bootstrap.main()
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