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# Copyright 2009 Canonical Ltd. This software is licensed under the
# GNU Affero General Public License version 3 (see the file LICENSE).
__metaclass__ = type
def valid_debian_version(version):
"""
Returns True if version is a valid debian version string
As per http://www.debian.org/doc/debian-policy/ch-controlfields.html
(Except we appear to need to allow ~ characters, which is not documented
in the spec.)
>>> valid_debian_version('1')
True
>>> valid_debian_version('1.0')
True
>>> valid_debian_version('1:1.0')
True
>>> valid_debian_version('1.0-1')
True
>>> valid_debian_version("1:1.0-1")
True
>>> valid_debian_version("3.4-2.1")
True
>>> valid_debian_version("1.5.4-1.woody.0")
True
>>> valid_debian_version("1.5.4-1.WOODY.0")
True
>>> valid_debian_version("1.6-0+1.5a-4")
True
>>> valid_debian_version("1.3~rc1-4")
True
>>> valid_debian_version("1:")
False
>>> valid_debian_version("1:-")
False
>>> valid_debian_version("44-")
False
>>> valid_debian_version("~-~")
False
>>> valid_debian_version("0~")
True
>>> valid_debian_version("0~-~")
True
>>> valid_debian_version(":44")
False
>>> valid_debian_version("foo:")
False
>>> valid_debian_version("12:12:alpha-alpha")
True
>>> valid_debian_version("build9-6")
True
"""
import re
m = re.search("""^(?ix)
([0-9]+:)?
([0-9a-z][a-z0-9+:.~-]*?)
(-[a-z0-9+.~]+)?
$""", version)
if m is None:
return False
epoch, version, revision = m.groups()
if not epoch:
# Can't contain : if no epoch
if ":" in version:
return False
if not revision:
# Can't contain - if no revision
if "-" in version:
return False
return True
def sane_version(version):
'''A sane version number for use by ProductRelease and DistroSeries.
We may make it less strict if required, but it would be nice if we can
enforce simple version strings because we use them in URLs
>>> sane_version('hello')
True
>>> sane_version('HELLO')
True
>>> sane_version('1.0')
True
>>> sane_version('12:45')
False
>>> sane_version('1b2')
True
>>> sane_version('1-')
False
>>> sane_version('1-2')
True
>>> sane_version('-2')
False
>>> sane_version('uncle sam')
False
>>> sane_version('uncle_sam')
True
>>> sane_version('uncle-sam')
True
'''
import re
if re.search("""^(?ix)
[0-9a-z]
( [0-9a-z] | [0-9a-z._-]*[0-9a-z] )*
$""", version):
return True
return False
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