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