in setup.py [0:0]
def download_files(self):
for package in self.packages:
dest = os.path.join(self.destdir, self.package_destination(package[1], package[2]))
if os.path.isfile(dest):
print('Skipping download of {dest}'.format(dest=dest))
else:
url = self.package_url(package[0], package[1], package[2])
self.download_file(url, dest)