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#!/usr/bin/env python
"""Checks for link behavior required for sdist to retain symlinks."""
from __future__ import (absolute_import, division, print_function)
__metaclass__ = type
import os
import platform
import shutil
import sys
import tempfile
def main():
"""Main program entry point."""
temp_dir = tempfile.mkdtemp()
target_path = os.path.join(temp_dir, 'file.txt')
symlink_path = os.path.join(temp_dir, 'symlink.txt')
hardlink_path = os.path.join(temp_dir, 'hardlink.txt')
try:
with open(target_path, 'w'):
pass
os.symlink(target_path, symlink_path)
os.link(symlink_path, hardlink_path)
if not os.path.islink(symlink_path):
abort('Symbolic link not created.')
if not os.path.islink(hardlink_path):
# known issue on MacOS (Darwin)
abort('Hard link of symbolic link created as a regular file.')
finally:
shutil.rmtree(temp_dir)
def abort(reason):
"""
:type reason: str
"""
sys.exit('ERROR: %s\n'
'This will prevent symbolic links from being preserved in the resulting tarball.\n'
'Aborting creation of sdist on platform: %s'
% (reason, platform.system()))
if __name__ == '__main__':
main()
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