On Fri, Mar 13, 2009, Gerry Reno wrote:
> Manuel,
> 'bdist_rpm' is NOT broken. What is broken is packagers misuse of the
> 'version' and 'release' strings. They do stupid things like put
> version='3.0' and release='rc1' and then wonder why their final release
> cannot update the release candidate. THIS IS A TRAINING ISSUE...
This is a pretty good description of the cause of the problem,
but doesn't address a solution that may be used in software.
I deal mostly with building RPMs used under the OpenPKG portable
package management system which generally uses sane naming
conventions, at least as far as the release designations while
versions depend on the original package versions.
The attached bit of code is basically what we use to determine
the most recent packages, and works by splitting the version and
release into tuples of numeric and non-numeric parts, then
comparing these tuples. This is based on a recipe in the
O'Reilly Python Cookbook to sort file names containing numerics.
This seems to solve most of the problems of sorting RPM packages
on version and release, but might fail in places where there are
issues of case-sensitivity.
Bill
--
INTERNET: b...@celestial.com Bill Campbell; Celestial Software LLC
URL: http://www.celestial.com/ PO Box 820; 6641 E. Mercer Way
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Fax: (206) 232-9186
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a revolutionary act. --George Orwell
# Class to facilitate sorting RPM packages based on version and
# release by splitting the version and release into tuples with
# numeric and non-numeric parts.
#
# This is based on code from the O'Reilly Python Cookbook, which
# I don't have handy to cite the page number.
#
import os, re
rpmcmd = '/bin/rpm'
_fmt = r"--queryformat='%{NAME}:%{VERSION}:%{RELEASE}:%{ARCH}\n'"
_digits = re.compile(r'(\d+)');
class RPM(object):
def _ver(self, s):
parts = []
for part in s.split('.'):
r = _digits.split(part)
r[1::2] = [int(p) for p in r[1::2]]
parts.append(tuple(r))
return(tuple(parts))
def __init__(self, file=None, name=None, query=None):
if not query:
if file:
cmd = '%s -qp %s %s' % (rpmcmd, _fmt, file)
self.file = file
else:
cmd = '%s -q %s %s' % (rpmcmd, _fmt, name)
self.file = 'installed'
fh = os.popen(cmd)
query = fh.readline().strip()
fh.close()
self.query = query
(self.name, version, release, self.arch) = query.split(':')
self._version = version
self._release = release
self.version = self._ver(version)
self.release = self._ver(release)
self.ver_rel = (self.version, self.release)
def __cmp__(self, other):
assert isinstance(other, RPM)
return(cmp(self.ver_rel, other.ver_rel))
if __name__ == '__main__':
print 'OK';
print rpmcmd
print _fmt
rpm = RPM(name='python')
print rpm.query;
print rpm.name
print rpm.version
print rpm.release
print rpm.ver_rel
print rpm.arch
print rpm.__cmp__(rpm)
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