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#!/usr/bin/env python
import os
import re
import sys
if 'CLOUD_INIT_TOP_D' in os.environ:
topd = os.path.realpath(os.environ.get('CLOUD_INIT_TOP_D'))
else:
topd = os.path.dirname(os.path.dirname(os.path.realpath(__file__)))
for fname in ("setup.py", "requirements.txt"):
if not os.path.isfile(os.path.join(topd, fname)):
sys.stderr.write("Unable to locate '%s' file that should "
"exist in cloud-init root directory." % fname)
sys.exit(1)
if len(sys.argv) > 1:
reqfile = sys.argv[1]
else:
reqfile = "requirements.txt"
with open(os.path.join(topd, reqfile), "r") as fp:
for line in fp:
if not line.strip() or line.startswith("#"):
continue
sys.stdout.write(re.split("[>=.<]*", line)[0].strip() + "\n")
sys.exit(0)
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