/usr/share/doc/python-apt-doc/examples/depcache.py is in python-apt-doc 1.6.0.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 | #!/usr/bin/python
# example how to deal with the depcache
import apt_pkg
from progress import TextProgress
# init
apt_pkg.init()
progress = TextProgress()
cache = apt_pkg.Cache(progress)
print "Available packages: %s " % cache.package_count
iter = cache["base-config"]
print "example package iter: %s" % iter
# get depcache
print "\n\n depcache"
depcache = apt_pkg.DepCache(cache)
depcache.read_pinfile()
# init is needed after the creation/pin file reading
depcache.init(progress)
print "got a depcache: %s " % depcache
print "Marked for install: %s " % depcache.inst_count
print "\n\n Reinit"
depcache.init(progress)
#sys.exit()
# get a canidate version
ver = depcache.get_candidate_ver(iter)
print "Candidate version: %s " % ver
print "\n\nQuerry interface"
print "%s.is_upgradable(): %s" % (iter.name, depcache.is_upgradable(iter))
print "\nMarking interface"
print "Marking '%s' for install" % iter.name
depcache.mark_install(iter)
print "Install count: %s " % depcache.inst_count
print "%s.marked_install(): %s" % (iter.name, depcache.marked_install(iter))
print "%s.marked_upgrade(): %s" % (iter.name, depcache.marked_upgrade(iter))
print "%s.marked_delete(): %s" % (iter.name, depcache.marked_delete(iter))
print "Marking %s for delete" % iter.name
depcache.mark_delete(iter)
print "del_count: %s " % depcache.del_count
print "%s.marked_delete(): %s" % (iter.name, depcache.marked_delete(iter))
iter = cache["3dchess"]
print "\nMarking '%s' for install" % iter.name
depcache.mark_install(iter)
print "Install count: %s " % depcache.inst_count
print "%s.marked_install(): %s" % (iter.name, depcache.marked_install(iter))
print "%s.marked_upgrade(): %s" % (iter.name, depcache.marked_upgrade(iter))
print "%s.marked_delete(): %s" % (iter.name, depcache.marked_delete(iter))
print "Marking %s for keep" % iter.name
depcache.mark_keep(iter)
print "Install: %s " % depcache.inst_count
iter = cache["synaptic"]
print "\nMarking '%s' for install" % iter.name
depcache.mark_install(iter)
print "Install: %s " % depcache.inst_count
print "Broken count: %s" % depcache.broken_count
print "fix_broken() "
depcache.fix_broken()
print "Broken count: %s" % depcache.broken_count
print "\nPerforming upgrade"
depcache.upgrade()
print "Keep: %s " % depcache.keep_count
print "Install: %s " % depcache.inst_count
print "Delete: %s " % depcache.del_count
print "usr_size: %s " % apt_pkg.size_to_str(depcache.usr_size)
print "deb_size: %s " % apt_pkg.size_to_str(depcache.deb_size)
for pkg in cache.packages:
if pkg.current_ver is not None and not depcache.marked_install(pkg) \
and depcache.is_upgradable(pkg):
print "upgrade didn't upgrade (kept): %s" % pkg.name
print "\nPerforming DistUpgrade"
depcache.upgrade(True)
print "Keep: %s " % depcache.keep_count
print "Install: %s " % depcache.inst_count
print "Delete: %s " % depcache.del_count
print "usr_size: %s " % apt_pkg.size_to_str(depcache.usr_size)
print "deb_size: %s " % apt_pkg.size_to_str(depcache.deb_size)
# overview about what would happen
for pkg in cache.packages:
if depcache.marked_install(pkg):
if pkg.current_ver is not None:
print "Marked upgrade: %s " % pkg.name
else:
print "Marked install: %s" % pkg.name
elif depcache.marked_delete(pkg):
print "Marked delete: %s" % pkg.name
elif depcache.marked_keep(pkg):
print "Marked keep: %s" % pkg.name
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