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#!/usr/bin/python
# example how to deal with the depcache
import apt
import apt_pkg
import sys, os
import copy
from progress import TextFetchProgress, TextInstallProgress
from apt.progress import OpTextProgress
class TextInstallProgress(InstallProgress):
def __init__(self):
InstallProgress.__init__(self)
self.status = None
def StartUpdate(self):
print "StartUpdate: %s" % self.statusfd
self.status = os.fdopen(self.statusfd, "r")
print self.status
def UpdateInterface(self):
if self.status != None:
s = self.status.readline()
if s:
print s
def FinishUpdate(self):
self.status.close()
# init
apt_pkg.init()
progress = OpTextProgress()
cache = apt_pkg.GetCache(progress)
print "Available packages: %s " % cache.PackageCount
# get depcache
depcache = apt_pkg.GetDepCache(cache)
depcache.ReadPinFile()
depcache.Init(progress)
# do something
fprogress = TextFetchProgress()
iprogress = TextInstallProgress()
# can be used to set a custom fork method (like vte.Terminal.forkpty)
#iprogress.fork = os.fork
iter = cache["base-config"]
print "\n%s"%iter
# install or remove, the importend thing is to keep us busy :)
if iter.CurrentVer == None:
depcache.MarkInstall(iter)
else:
depcache.MarkDelete(iter)
res = depcache.Commit(fprogress, iprogress)
print res
print "Exiting"
sys.exit(0)
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