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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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