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#!/usr/bin/python
# example how to deal with the depcache
import apt_pkg
import sys
import copy
class MyProgress:
def __init__(self):
self.last = 0.0
def Update(self, percent):
if (self.last + 1.0) <= percent:
print "Progress: %s " % (percent)
self.last = percent
if percent >= 100:
self.last = 0.0
def Done(self):
self.last = 0.0
print "Done!"
# init
apt_pkg.init()
progress = MyProgress()
cache = apt_pkg.GetCache(progress)
print "Available packages: %s " % cache.PackageCount
iter = cache["base-config"]
print "example package iter: %s" % iter
# get depcache
print "\n\n depcache"
depcache = apt_pkg.GetDepCache(cache, progress)
depcache.ReadPinFile()
# init is needed after the creation/pin file reading
depcache.Init()
print "got a depcache: %s " % depcache
print "Marked for install: %s " % depcache.InstCount
print "\n\n Reinit"
depcache.Init(progress)
#sys.exit()
# get a canidate version
ver= depcache.GetCandidateVer(iter)
print "Candidate version: %s " % ver
print "\n\nQuerry interface"
print "%s.IsUpgradable(): %s" % (iter.Name, depcache.IsUpgradable(iter))
print "\nMarking interface"
print "Marking '%s' for install" % iter.Name
depcache.MarkInstall(iter)
print "Install count: %s " % depcache.InstCount
print "%s.MarkedInstall(): %s" % (iter.Name, depcache.MarkedInstall(iter))
print "%s.MarkedUpgrade(): %s" % (iter.Name, depcache.MarkedUpgrade(iter))
print "%s.MarkedDelete(): %s" % (iter.Name, depcache.MarkedDelete(iter))
print "Marking %s for delete" % iter.Name
depcache.MarkDelete(iter)
print "DelCount: %s " % depcache.DelCount
print "%s.MarkedDelete(): %s" % (iter.Name, depcache.MarkedDelete(iter))
iter = cache["3dchess"]
print "\nMarking '%s' for install" % iter.Name
depcache.MarkInstall(iter)
print "Install count: %s " % depcache.InstCount
print "%s.MarkedInstall(): %s" % (iter.Name, depcache.MarkedInstall(iter))
print "%s.MarkedUpgrade(): %s" % (iter.Name, depcache.MarkedUpgrade(iter))
print "%s.MarkedDelete(): %s" % (iter.Name, depcache.MarkedDelete(iter))
print "Marking %s for keep" % iter.Name
depcache.MarkKeep(iter)
print "Install: %s " % depcache.InstCount
iter = cache["3dwm-server"]
print "\nMarking '%s' for install" % iter.Name
depcache.MarkInstall(iter)
print "Install: %s " % depcache.InstCount
print "Broken count: %s" % depcache.BrokenCount
print "FixBroken() "
depcache.FixBroken()
print "Broken count: %s" % depcache.BrokenCount
print "\nPerforming Upgrade"
depcache.Upgrade()
print "Keep: %s " % depcache.KeepCount
print "Install: %s " % depcache.InstCount
print "Delete: %s " % depcache.DelCount
print "UsrSize: %s " % apt_pkg.SizeToStr(depcache.UsrSize)
print "DebSize: %s " % apt_pkg.SizeToStr(depcache.DebSize)
for pkg in cache.Packages:
if pkg.CurrentVer != None and not depcache.MarkedInstall(pkg) and depcache.IsUpgradable(pkg):
print "Upgrade didn't upgrade (kept): %s" % pkg.Name
print "\nPerforming DistUpgrade"
depcache.Upgrade(True)
print "Keep: %s " % depcache.KeepCount
print "Install: %s " % depcache.InstCount
print "Delete: %s " % depcache.DelCount
print "UsrSize: %s " % apt_pkg.SizeToStr(depcache.UsrSize)
print "DebSize: %s " % apt_pkg.SizeToStr(depcache.DebSize)
# overview about what would happen
for pkg in cache.Packages:
if depcache.MarkedInstall(pkg):
if pkg.CurrentVer != None:
print "Marked upgrade: %s " % pkg.Name
else:
print "Marked install: %s" % pkg.Name
elif depcache.MarkedDelete(pkg):
print "Marked delete: %s" % pkg.Name
elif depcache.MarkedKeep(pkg):
print "Marked keep: %s" % pkg.Name
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