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Viewing changes to landscape/package/skeleton.py

  • Committer: Bazaar Package Importer
  • Author(s): Rick Clark
  • Date: 2008-09-08 16:35:57 UTC
  • mto: This revision was merged to the branch mainline in revision 2.
  • Revision ID: james.westby@ubuntu.com-20080908163557-fl0d2oc35hur473w
Tags: upstream-1.0.18
Import upstream version 1.0.18

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landscape/package/skeleton.py
 
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import sha
 
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PACKAGE   = 1 << 0
 
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PROVIDES  = 1 << 1
 
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REQUIRES  = 1 << 2
 
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UPGRADES  = 1 << 3
 
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CONFLICTS = 1 << 4
 
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DEB_PACKAGE       = 1 << 16 | PACKAGE
 
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DEB_PROVIDES      = 2 << 16 | PROVIDES
 
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DEB_NAME_PROVIDES = 3 << 16 | PROVIDES
 
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DEB_REQUIRES      = 4 << 16 | REQUIRES
 
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DEB_OR_REQUIRES   = 5 << 16 | REQUIRES
 
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DEB_UPGRADES      = 6 << 16 | UPGRADES
 
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DEB_CONFLICTS     = 7 << 16 | CONFLICTS
 
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class PackageTypeError(Exception):
 
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    """Raised when an unsupported package type is passed to build_skeleton."""
 
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class PackageSkeleton(object):
 
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    section = None
 
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    summary = None
 
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    description = None
 
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    size = None
 
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    installed_size = None
 
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    def __init__(self, type, name, version):
 
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        self.type = type
 
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        self.name = name
 
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        self.version = version
 
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        self.relations = []
 
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    def add_relation(self, type, info):
 
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        self.relations.append((type, info))
 
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    def get_hash(self):
 
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        digest = sha.new("[%d %s %s]" % (self.type, self.name, self.version))
 
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        self.relations.sort()
 
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        for pair in self.relations:
 
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            digest.update("[%d %s]" % pair)
 
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        return digest.digest()
 
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def build_skeleton(pkg, with_info=False):
 
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    if not build_skeleton.inited:
 
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        build_skeleton.inited = True
 
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        global DebPackage, DebNameProvides, DebOrDepends
 
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        # Importing from backends depends on smart.init().
 
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        from smart.backends.deb.base import (
 
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            DebPackage, DebNameProvides, DebOrDepends)
 
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    if not isinstance(pkg, DebPackage):
 
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        raise PackageTypeError()
 
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    skeleton = PackageSkeleton(DEB_PACKAGE, pkg.name, pkg.version)
 
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    relations = set()
 
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    for relation in pkg.provides:
 
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        if isinstance(relation, DebNameProvides):
 
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            relations.add((DEB_NAME_PROVIDES, str(relation)))
 
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        else:
 
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            relations.add((DEB_PROVIDES, str(relation)))
 
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    for relation in pkg.requires:
 
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        if isinstance(relation, DebOrDepends):
 
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            relations.add((DEB_OR_REQUIRES, str(relation)))
 
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        else:
 
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            relations.add((DEB_REQUIRES, str(relation)))
 
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    for relation in pkg.upgrades:
 
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        relations.add((DEB_UPGRADES, str(relation)))
 
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    for relation in pkg.conflicts:
 
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        relations.add((DEB_CONFLICTS, str(relation)))
 
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    skeleton.relations = sorted(relations)
 
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    if with_info:
 
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        info = pkg.loaders.keys()[0].getInfo(pkg)
 
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        skeleton.section = info.getGroup()
 
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        skeleton.summary = info.getSummary()
 
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        skeleton.description = info.getDescription()
 
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        skeleton.size = sum(info.getSize(url) for url in info.getURLs())
 
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        skeleton.installed_size = info.getInstalledSize()
 
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    return skeleton
 
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build_skeleton.inited = False