diff options
Diffstat (limited to 'x.py')
-rwxr-xr-x | x.py | 59 |
1 files changed, 40 insertions, 19 deletions
@@ -4,26 +4,47 @@ # This file is only a "symlink" to bootstrap.py, all logic should go there. -import os -import sys - -# 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 sys.version_info.major < 3: - try: - os.execvp("py", ["py", "-3"] + sys.argv) - except OSError: +# 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("python3", ["python3"] + sys.argv) + os.execvp("py", ["py", "-3"] + sys.argv) except OSError: - # Python 3 isn't available, fall back to python 2 - pass + 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")) + 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() + import bootstrap + bootstrap.main() |