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import operator
import re
from collections import namedtuple
import requests
base_url = 'https://download.docker.com/linux/static/{0}/x86_64/'
categories = [
'edge',
'stable',
'test'
]
class Version(namedtuple('_Version', 'major minor patch rc edition')):
@classmethod
def parse(cls, version):
edition = None
version = version.lstrip('v')
version, _, rc = version.partition('-')
if rc:
if 'rc' not in rc:
edition = rc
rc = None
elif '-' in rc:
edition, rc = rc.split('-')
major, minor, patch = version.split('.', 3)
return cls(major, minor, patch, rc, edition)
@property
def major_minor(self):
return self.major, self.minor
@property
def order(self):
"""Return a representation that allows this object to be sorted
correctly with the default comparator.
"""
# rc releases should appear before official releases
rc = (0, self.rc) if self.rc else (1, )
return (int(self.major), int(self.minor), int(self.patch)) + rc
def __str__(self):
rc = '-{}'.format(self.rc) if self.rc else ''
edition = '-{}'.format(self.edition) if self.edition else ''
return '.'.join(map(str, self[:3])) + edition + rc
def main():
results = set()
for url in [base_url.format(cat) for cat in categories]:
res = requests.get(url)
content = res.text
versions = [
Version.parse(
v.strip('"').lstrip('docker-').rstrip('.tgz').rstrip('-x86_64')
) for v in re.findall(
r'"docker-[0-9]+\.[0-9]+\.[0-9]+-.*tgz"', content
)
]
sorted_versions = sorted(
versions, reverse=True, key=operator.attrgetter('order')
)
latest = sorted_versions[0]
results.add(str(latest))
print(' '.join(results))
if __name__ == '__main__':
main()
|
