cmdline/apt-mark

   1 #!/usr/bin/python
   2
   3 from optparse import OptionParser
   4
   5 import sys
   6 import os.path
   7
   8 try:
   9     import apt_pkg
  10 except ImportError:
  11     print "Error importing apt_pkg, is python-apt installed?"
  12     sys.exit(1)
  13
  14 actions = { "markauto" : 1,
  15             "unmarkauto": 0
  16           }
  17
  18 def show_automatic(filename):
  19     if not os.path.exists(STATE_FILE):
  20         return
  21     auto = set()
  22     tagfile = apt_pkg.ParseTagFile(open(STATE_FILE))
  23     while tagfile.Step():
  24         pkgname = tagfile.Section.get("Package")
  25         autoInst = tagfile.Section.get("Auto-Installed")
  26         if int(autoInst):
  27             auto.add(pkgname)
  28     print "\n".join(sorted(auto))
  29
  30
  31 def mark_unmark_automatic(filename, action, pkgs):
  32     " mark or unmark automatic flag"
  33     # open the statefile
  34     if os.path.exists(STATE_FILE):
  35         try:
  36             tagfile = apt_pkg.ParseTagFile(open(STATE_FILE))
  37             outfile = open(STATE_FILE+".tmp","w")
  38         except IOError, msg:
  39             print "%s, are you root?" % (msg)
  40             sys.exit(1)
  41         while tagfile.Step():
  42             pkgname = tagfile.Section.get("Package")
  43             autoInst = tagfile.Section.get("Auto-Installed")
  44             if pkgname in pkgs:
  45                 if options.verbose:
  46                     print "changing %s to %s" % (pkgname,action)
  47                 newsec = apt_pkg.RewriteSection(tagfile.Section,
  48                                        [],
  49                                        [ ("Auto-Installed",str(action)) ])
  50                 pkgs.remove(pkgname)
  51                 outfile.write(newsec+"\n")
  52             else:
  53                 outfile.write(str(tagfile.Section)+"\n")
  54         if action == 1:
  55             for pkgname in pkgs:
  56                 if options.verbose:
  57                     print "changing %s to %s" % (pkgname,action)
  58                 outfile.write("Package: %s\nAuto-Installed: %d\n\n" % (pkgname, action))
  59         # all done, rename the tmpfile
  60         os.chmod(outfile.name, 0644)
  61         os.rename(outfile.name, STATE_FILE)
  62         os.chmod(STATE_FILE, 0644)
  63
  64
  65 if __name__ == "__main__":
  66     apt_pkg.init()
  67
  68     # option parsing
  69     parser = OptionParser()
  70     parser.usage = "%prog [options] {markauto|unmarkauto} packages..."
  71     parser.add_option("-f", "--file", action="store", type="string",
  72                       dest="filename",
  73                       help="read/write a different file")
  74     parser.add_option("-v", "--verbose",
  75                       action="store_true", dest="verbose", default=False,
  76                       help="print verbose status messages to stdout")
  77     (options, args) = parser.parse_args()
  78
  79     # get the state-file
  80     if not options.filename:
  81         STATE_FILE = apt_pkg.Config.FindDir("Dir::State") + "extended_states"
  82     else:
  83         STATE_FILE=options.filename
  84
  85     if args[0] == "showauto":
  86         show_automatic(STATE_FILE)
  87     else:
  88         # get pkgs to change
  89         if args[0] not in actions.keys():
  90             parser.error("first argument must be 'markauto', 'unmarkauto' or 'showauto'")
  91         pkgs = args[1:]
  92         action = actions[args[0]]
  93         mark_unmark_automatic(STATE_FILE, action, pkgs)