09378f56c0
Spack is internally using a patched version of `argparse` mainly to backport Python 3 functionality into Python 2. This PR makes it such that for the supported Python 3 versions we use `argparse` from the standard Python library. This PR has been extracted from #25371 where it was needed to be able to use recent versions of `pytest`. * Fixed formatting issues when using a pristine argparse.py * Fix error message for Python 3.X when missing positional arguments * Account for the change of API in Python 3.7 * Layout multi-valued args into columns in error messages * Seamless transition in develop if argparse.pyc is in external * Be more defensive in case we can't remove the file.
100 lines
3.4 KiB
Python
Executable file
100 lines
3.4 KiB
Python
Executable file
#!/bin/sh
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# -*- python -*-
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#
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# Copyright 2013-2021 Lawrence Livermore National Security, LLC and other
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# Spack Project Developers. See the top-level COPYRIGHT file for details.
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#
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# SPDX-License-Identifier: (Apache-2.0 OR MIT)
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# This file is bilingual. The following shell code finds our preferred python.
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# Following line is a shell no-op, and starts a multi-line Python comment.
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# See https://stackoverflow.com/a/47886254
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""":"
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# prefer SPACK_PYTHON environment variable, python3, python, then python2
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SPACK_PREFERRED_PYTHONS="python3 python python2 /usr/libexec/platform-python"
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for cmd in "${SPACK_PYTHON:-}" ${SPACK_PREFERRED_PYTHONS}; do
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if command -v > /dev/null "$cmd"; then
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export SPACK_PYTHON="$(command -v "$cmd")"
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exec "${SPACK_PYTHON}" "$0" "$@"
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fi
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done
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echo "==> Error: spack could not find a python interpreter!" >&2
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exit 1
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":"""
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# Line above is a shell no-op, and ends a python multi-line comment.
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# The code above runs this file with our preferred python interpreter.
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from __future__ import print_function
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import os
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import os.path
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import sys
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min_python3 = (3, 5)
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if sys.version_info[:2] < (2, 6) or (
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sys.version_info[:2] >= (3, 0) and sys.version_info[:2] < min_python3
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):
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v_info = sys.version_info[:3]
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msg = "Spack requires Python 2.6, 2.7 or %d.%d or higher " % min_python3
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msg += "You are running spack with Python %d.%d.%d." % v_info
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sys.exit(msg)
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# Find spack's location and its prefix.
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spack_file = os.path.realpath(os.path.expanduser(__file__))
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spack_prefix = os.path.dirname(os.path.dirname(spack_file))
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# Allow spack libs to be imported in our scripts
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spack_lib_path = os.path.join(spack_prefix, "lib", "spack")
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sys.path.insert(0, spack_lib_path)
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# Add external libs
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spack_external_libs = os.path.join(spack_lib_path, "external")
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if sys.version_info[:2] <= (2, 7):
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sys.path.insert(0, os.path.join(spack_external_libs, "py2"))
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if sys.version_info[:2] == (2, 6):
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sys.path.insert(0, os.path.join(spack_external_libs, "py26"))
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sys.path.insert(0, spack_external_libs)
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# Here we delete ruamel.yaml in case it has been already imported from site
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# (see #9206 for a broader description of the issue).
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#
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# Briefly: ruamel.yaml produces a .pth file when installed with pip that
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# makes the site installed package the preferred one, even though sys.path
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# is modified to point to another version of ruamel.yaml.
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if "ruamel.yaml" in sys.modules:
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del sys.modules["ruamel.yaml"]
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if "ruamel" in sys.modules:
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del sys.modules["ruamel"]
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# The following code is here to avoid failures when updating
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# the develop version, due to spurious argparse.pyc files remaining
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# in the libs/spack/external directory, see:
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# https://github.com/spack/spack/pull/25376
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# TODO: Remove in v0.18.0 or later
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try:
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import argparse
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except ImportError:
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argparse_pyc = os.path.join(spack_external_libs, 'argparse.pyc')
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if not os.path.exists(argparse_pyc):
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raise
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try:
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os.remove(argparse_pyc)
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import argparse # noqa
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except Exception:
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msg = ('The file\n\n\t{0}\n\nis corrupted and cannot be deleted by Spack. '
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'Either delete it manually or ask some administrator to '
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'delete it for you.')
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print(msg.format(argparse_pyc))
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sys.exit(1)
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import spack.main # noqa
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# Once we've set up the system path, run the spack main method
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if __name__ == "__main__":
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sys.exit(spack.main.main())
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