pysize/main.py

   1 # This program is free software; you can redistribute it and/or modify
   2 # it under the terms of the GNU General Public License as published by
   3 # the Free Software Foundation; either version 2 of the License, or
   4 # (at your option) any later version.
   5 #
   6 # This program is distributed in the hope that it will be useful,
   7 # but WITHOUT ANY WARRANTY; without even the implied warranty of
   8 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   9 # GNU Library General Public License for more details.
  10 #
  11 # You should have received a copy of the GNU General Public License
  12 # along with this program; if not, write to the Free Software
  13 # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  14 #
  15 # See the COPYING file for license information.
  16 #
  17 # Copyright (c) 2006, 2007, 2008  Guillaume Chazarain <guichaz@gmail.com>
  18
  19 import sys
  20 import os
  21 import optparse
  22 import locale
  23
  24 if sys.hexversion < 0x02040000:
  25     print >> sys.stderr, 'Your python version is too old (%s)' % \
  26                                                         (sys.version.split()[0])
  27     print >> sys.stderr, 'You need at least Python 2.4'
  28     sys.exit(1)
  29
  30 from pysize.ui.ascii import ui_ascii
  31 from pysize.ui.curses import ui_curses
  32 from pysize.ui.gtk import ui_gtk
  33 from pysize.ui.utils import UINotAvailableException
  34 from pysize.version import VERSION
  35 from pysize.core.exception_propagation import unexpect
  36
  37 def _ui_auto(options, args):
  38     """Automatically choose the best available UI."""
  39     for ui_run in ui_gtk.run, ui_curses.run, ui_ascii.run:
  40         try:
  41             ui_run(options, args)
  42             return
  43         except UINotAvailableException:
  44             pass
  45
  46     raise UINotAvailableException
  47
  48 UI = {'ascii': ui_ascii.run, 'curses': ui_curses.run,
  49       'gtk': ui_gtk.run, 'auto': _ui_auto}
  50
  51 def _profile(continuation):
  52     prof_file = 'pysize.prof'
  53     try:
  54         import cProfile
  55         import pstats
  56         print 'Profiling using cProfile'
  57         cProfile.runctx('continuation()', globals(), locals(), prof_file)
  58         stats = pstats.Stats(prof_file)
  59     except ImportError:
  60         import hotshot
  61         import hotshot.stats
  62         prof = hotshot.Profile(prof_file)
  63         print 'Profiling using hotshot'
  64         prof.runcall(continuation)
  65         prof.close()
  66         stats = hotshot.stats.load(prof_file)
  67     stats.strip_dirs()
  68     stats.sort_stats('time', 'calls')
  69     stats.print_stats(40)
  70     os.remove(prof_file)
  71
  72 def _try_psyco():
  73     try:
  74         # Try to use psyco if available
  75         import psyco
  76         psyco.full()
  77     except ImportError:
  78         pass
  79
  80 def setprocname(name):
  81     # From comments on http://davyd.livejournal.com/166352.html
  82     try:
  83         # For Python-2.5
  84         import ctypes
  85         libc = ctypes.CDLL(None)
  86         # Linux 2.6 PR_SET_NAME
  87         if libc.prctl(15, name, 0, 0, 0):
  88             # BSD
  89             libc.setproctitle(name)
  90     except:
  91         try:
  92             # For 32 bit
  93             import dl
  94             libc = dl.open(None)
  95             name += '\0'
  96             # Linux 2.6 PR_SET_NAME
  97             if libc.call('prctl', 15, name, 0, 0, 0):
  98                 # BSD
  99                 libc.call('setproctitle', name)
 100         except:
 101             pass
 102
 103 @unexpect(Exception)
 104 def main():
 105     _try_psyco()
 106     locale.setlocale(locale.LC_ALL, '')
 107     setprocname('pysize')
 108     usage = '%s [OPTIONS] [DIRECTORIES...]' % (sys.argv[0])
 109     parser = optparse.OptionParser(usage=usage, version='pysize ' + VERSION)
 110     parser.add_option('--ui', type='choice', choices=UI.keys(), default='auto',
 111                       help='choose the ui between: [auto], gtk, curses, ascii')
 112     parser.add_option('--xdev', action='store_false', dest='cross_device',
 113                       default=True,
 114                       help='ignore directories on other filesystems')
 115     parser.add_option('--max-depth', type='int', dest='max_depth', default=6,
 116                       metavar='DEPTH',
 117                       help='maximum depth of the displayed tree [6]')
 118     parser.add_option('--profile', action='store_true', dest='profile',
 119                       default=False, help=optparse.SUPPRESS_HELP)
 120     options, args = parser.parse_args()
 121
 122     if options.max_depth < 2:
 123         parser.error('maximum depth must be at least 2')
 124
 125     args = map(os.path.realpath, args)
 126     def continuation():
 127         try:
 128             UI[options.ui](options, args)
 129         except UINotAvailableException:
 130             print 'The interface "%s" is not available' % (options.ui)
 131
 132     if options.profile:
 133         _profile(continuation)
 134     else:
 135         continuation()