import os
import sys
try: # pragma: no cover (pip>=10)
from pip._internal import main as pip_main
except ImportError: # pragma: no cover (pip<10)
from pip import main as pip_main
def main():
findlinks, download_dest, pkg, pkgname = sys.argv[1:]
assert not pip_main(['wheel', pkg, '--wheel-dir', findlinks])
os.environ.pop('PIP_REQ_TRACKER', None) # not reentrant
assert not pip_main([
'download',
'--dest', download_dest,
'--find-links', 'file://{}'.format(findlinks),
'--no-index',
pkgname,
])