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7f2031558c
The most visible change in python3 - removal of print statement and all the crufty print >> sys.stderr, foo, The from __future__ import print_function makes it available in python 2.6
131 lines
3.9 KiB
Python
131 lines
3.9 KiB
Python
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from __future__ import print_function
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class PackageError(Exception):
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"""base class for all package related errors"""
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def __init__(self, fname, msg):
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Exception.__init__(self)
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self.fname = fname
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self.msg = msg
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class PackageQueries(dict):
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"""Dict of package name keys and package query values. When assigning a
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package query, to a name, the package is evaluated to see if it matches the
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wanted architecture and if it has a greater version than the current value.
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"""
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# map debian arches to common obs arches
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architectureMap = {'i386': ['i586', 'i686'], 'amd64': ['x86_64']}
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def __init__(self, wanted_architecture):
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self.wanted_architecture = wanted_architecture
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super(PackageQueries, self).__init__()
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def add(self, query):
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"""Adds package query to dict if it is of the correct architecture and
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is newer (has a greater version) than the currently assigned package.
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@param a PackageQuery
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"""
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self.__setitem__(query.name(), query)
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def __setitem__(self, name, query):
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if name != query.name():
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raise ValueError("key '%s' does not match "
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"package query name '%s'" % (name, query.name()))
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architecture = query.arch()
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if (architecture in [self.wanted_architecture, 'noarch', 'all'] or
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self.wanted_architecture in self.architectureMap.get(architecture,
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[])):
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current_query = self.get(name)
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# if current query does not exist or is older than this new query
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if current_query is None or current_query.vercmp(query) <= 0:
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super(PackageQueries, self).__setitem__(name, query)
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class PackageQuery:
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"""abstract base class for all package types"""
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def read(self, all_tags = False, *extra_tags):
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raise NotImplementedError
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def name(self):
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raise NotImplementedError
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def version(self):
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raise NotImplementedError
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def release(self):
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raise NotImplementedError
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def epoch(self):
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raise NotImplementedError
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def arch(self):
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raise NotImplementedError
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def description(self):
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raise NotImplementedError
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def path(self):
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raise NotImplementedError
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def provides(self):
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raise NotImplementedError
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def requires(self):
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raise NotImplementedError
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def gettag(self):
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raise NotImplementedError
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def vercmp(self, pkgquery):
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raise NotImplementedError
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def canonname(self):
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raise NotImplementedError
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@staticmethod
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def query(filename, all_tags = False, extra_rpmtags = (), extra_debtags = ()):
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f = open(filename, 'rb')
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magic = f.read(7)
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f.seek(0)
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extra_tags = ()
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pkgquery = None
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if magic[:4] == '\xed\xab\xee\xdb':
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from . import rpmquery
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pkgquery = rpmquery.RpmQuery(f)
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extra_tags = extra_rpmtags
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elif magic == '!<arch>':
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from . import debquery
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pkgquery = debquery.DebQuery(f)
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extra_tags = extra_debtags
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elif magic[:5] == '<?xml':
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f.close()
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return None
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elif magic[:5] == '\375\067zXZ' or magic[:2] == '\037\213':
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from . import archquery
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pkgquery = archquery.ArchQuery(f)
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else:
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raise PackageError(filename, 'unsupported package type. magic: \'%s\'' % magic)
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pkgquery.read(all_tags, *extra_tags)
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f.close()
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return pkgquery
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if __name__ == '__main__':
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import sys
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try:
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pkgq = PackageQuery.query(sys.argv[1])
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except PackageError as e:
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print(e.msg)
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sys.exit(2)
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print(pkgq.name())
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print(pkgq.version())
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print(pkgq.release())
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print(pkgq.description())
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print('##########')
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print('\n'.join(pkgq.provides()))
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print('##########')
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print('\n'.join(pkgq.requires()))
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