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Directory : /lib/python3/dist-packages/DistUpgrade/
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Current File : /lib/python3/dist-packages/DistUpgrade//DistUpgradeViewText.py
# DistUpgradeViewText.py 
#  
#  Copyright (c) 2004-2006 Canonical
#  
#  Author: Michael Vogt <michael.vogt@ubuntu.com>
# 
#  This program is free software; you can redistribute it and/or 
#  modify it under the terms of the GNU General Public License as 
#  published by the Free Software Foundation; either version 2 of the
#  License, or (at your option) any later version.
# 
#  This program is distributed in the hope that it will be useful,
#  but WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#  GNU General Public License for more details.
# 
#  You should have received a copy of the GNU General Public License
#  along with this program; if not, write to the Free Software
#  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
#  USA

import errno
import sys
import logging
import subprocess
from gettext import dgettext

import apt
import os

from .DistUpgradeApport import run_apport, apport_crash

from .DistUpgradeView import (
    AcquireProgress,
    DistUpgradeView,
    ENCODING,
    InstallProgress,
    )
from .telemetry import get as get_telemetry
import apt.progress

import gettext
from .DistUpgradeGettext import gettext as _
from .utils import twrap


def readline():
    """ py2/py3 compatible readline from stdin """
    sys.stdout.flush()
    try:
        s = input()
    except EOFError:
        s = ''
    if hasattr(s, "decode"):
        return s.decode(ENCODING, "backslashreplace")
    return s


class TextAcquireProgress(AcquireProgress, apt.progress.text.AcquireProgress):
    def __init__(self):
        apt.progress.text.AcquireProgress.__init__(self)
        AcquireProgress.__init__(self)
    def pulse(self, owner):
        apt.progress.text.AcquireProgress.pulse(self, owner)
        AcquireProgress.pulse(self, owner)
        return True


class TextInstallProgress(InstallProgress):

    # percent step when progress is reported (to avoid screen spam)
    MIN_REPORTING = 5

    def __init__(self, *args, **kwargs):
        super(TextInstallProgress, self).__init__(*args, **kwargs)
        self._prev_percent = 0

    def status_change(self, pkg, percent, status):
        if self._prev_percent + self.MIN_REPORTING < percent:
            # FIXME: move into ubuntu-release-upgrader after trusty
            domain = "libapt-pkg4.12"
            progress_str = dgettext(domain, "Progress: [%3i%%]") % int(percent)
            sys.stdout.write("\r\n%s\r\n" % progress_str)
            self._prev_percent = percent


class TextCdromProgressAdapter(apt.progress.base.CdromProgress):
    """ Report the cdrom add progress  """
    def update(self, text, step):
        """ update is called regularly so that the gui can be redrawn """
        if text:
          print("%s (%f)" % (text, step.value/float(self.totalSteps)*100))
    def ask_cdrom_name(self):
        return (False, "")
    def change_cdrom(self):
        return False


class DistUpgradeViewText(DistUpgradeView):
    """ text frontend of the distUpgrade tool """

    def __init__(self, datadir=None, logdir=None):
        # indicate that we benefit from using gnu screen
        self.needs_screen = True
        get_telemetry().set_updater_type('Text')
        # its important to have a debconf frontend for
        # packages like "quagga"
        if "DEBIAN_FRONTEND" not in os.environ:
            os.environ["DEBIAN_FRONTEND"] = "dialog"
        if not datadir or datadir == '.':
          localedir=os.path.join(os.getcwd(),"mo")
        else:
          localedir="/usr/share/locale/ubuntu-release-upgrader"

        try:
          gettext.bindtextdomain("ubuntu-release-upgrader", localedir)
          gettext.textdomain("ubuntu-release-upgrader")
        except Exception as e:
          logging.warning("Error setting locales (%s)" % e)

        self.last_step = None # keep a record of the latest step
        self._opCacheProgress = apt.progress.text.OpProgress()
        self._acquireProgress = TextAcquireProgress()
        self._cdromProgress = TextCdromProgressAdapter()
        self._installProgress = TextInstallProgress()
        sys.excepthook = self._handleException
        #self._process_events_tick = 0

    def _handleException(self, type, value, tb):
        # we handle the exception here, hand it to apport and run the
        # apport gui manually after it because we kill u-n during the upgrade
        # to prevent it from poping up for reboot notifications or FF restart
        # notifications or somesuch
        import traceback
        print()
        lines = traceback.format_exception(type, value, tb)
        logging.error("not handled exception:\n%s" % "\n".join(lines))
        apport_crash(type, value, tb)
        if not run_apport():
            self.error(_("A fatal error occurred"),
                       _("Please report this as a bug and include the "
                         "files /var/log/dist-upgrade/main.log and "
                         "/var/log/dist-upgrade/apt.log "
                         "in your report. The upgrade has aborted.\n"
                         "Your original sources.list was saved in "
                         "/etc/apt/sources.list.distUpgrade."),
                       "\n".join(lines))
        sys.exit(1)

    def getAcquireProgress(self):
        return self._acquireProgress
    def getInstallProgress(self, cache):
        self._installProgress._cache = cache
        return self._installProgress
    def getOpCacheProgress(self):
        return self._opCacheProgress
    def getCdromProgress(self):
        return self._cdromProgress
    def updateStatus(self, msg):
      print()
      print(msg)
      sys.stdout.flush()
    def abort(self):
      print()
      print(_("Aborting"))
    def setStep(self, step):
      super(DistUpgradeViewText, self).setStep(step)
      self.last_step = step
    def showDemotions(self, summary, msg, demotions):
        self.information(summary, msg, 
                         _("Demoted:\n")+twrap(", ".join(demotions)))
    def information(self, summary, msg, extended_msg=None):
      print()
      print(twrap(summary))
      print(twrap(msg))
      if extended_msg:
        print(twrap(extended_msg))
      print(_("To continue please press [ENTER]"))
      readline()
    def error(self, summary, msg, extended_msg=None):
      print()
      print(twrap(summary))
      print(twrap(msg))
      if extended_msg:
        print(twrap(extended_msg))
      return False
    def showInPager(self, output):
      """ helper to show output in a pager """
      # we need to send a encoded str (bytes in py3) to the pipe
      # LP: #1068389
      if not isinstance(output, bytes):
          output = output.encode(ENCODING)
      for pager in ["/usr/bin/sensible-pager", "/bin/more"]:
          if os.path.exists(pager):
              p = subprocess.Popen([pager,"-"],stdin=subprocess.PIPE)
              # if lots of data is shown, we need to catch EPIPE
              try:
                  p.stdin.write(output)
                  p.stdin.close()
                  p.wait()
              except IOError as e:
                  if e.errno != errno.EPIPE:
                      raise
              return
      # if we don't have a pager, just print
      print(output)

    def confirmChanges(self, summary, changes, demotions, downloadSize,
                       actions=None, removal_bold=True):
      DistUpgradeView.confirmChanges(self, summary, changes, demotions, 
                                     downloadSize, actions)
      print()
      print(twrap(summary))
      print(twrap(self.confirmChangesMessage))
      print(" %s %s" % (_("Continue [yN] "), _("Details [d]")), end="")
      while True:
        res = readline().strip().lower()
        # TRANSLATORS: the "y" is "yes"
        if res.startswith(_("y")):
          return True
        # TRANSLATORS: the "n" is "no"
        elif not res or res.startswith(_("n")):
          return False
        # TRANSLATORS: the "d" is "details"
        elif res.startswith(_("d")):
          output = ""
          if len(self.demotions) > 0:
              output += "\n"  
              output += twrap(
                  _("No longer supported: %s\n") % " ".join([p.name for p in self.demotions]),
                  subsequent_indent='  ')
          if len(self.toRemove) > 0:
              output += "\n"  
              output += twrap(
                  _("Remove: %s\n") % " ".join([p.name for p in self.toRemove]),
                  subsequent_indent='  ')
          if len(self.toRemoveAuto) > 0:
              output += twrap(
                  _("Remove (was auto installed) %s") % " ".join([p.name for p in self.toRemoveAuto]), 
                  subsequent_indent='  ')
              output += "\n"
          if len(self.toInstall) > 0:
              output += "\n"
              output += twrap(
                  _("Install: %s\n") % " ".join([p.name for p in self.toInstall]),
                  subsequent_indent='  ')
          if len(self.toUpgrade) > 0:
              output += "\n"  
              output += twrap(
                  _("Upgrade: %s\n") % " ".join([p.name for p in self.toUpgrade]),
                  subsequent_indent='  ')
          self.showInPager(output)
        print("%s %s" % (_("Continue [yN] "), _("Details [d]")), end="")

    def askYesNoQuestion(self, summary, msg, default='No'):
      print()
      if summary:
        print(twrap(summary))
      print(twrap(msg))
      if default == 'No':
          print(_("Continue [yN] "), end="")
          res = readline()
          # TRANSLATORS: first letter of a positive (yes) answer
          if res.strip().lower().startswith(_("y")):
              return True
          return False
      else:
          print(_("Continue [Yn] "), end="")
          res = readline()
          # TRANSLATORS: first letter of a negative (no) answer
          if res.strip().lower().startswith(_("n")):
              return False
          return True

    def askCancelContinueQuestion(self, summary, msg, default='Cancel'):
      return self.askYesNoQuestion(summary, msg,
        default='No' if default == 'Cancel' else 'Yes')

# FIXME: when we need this most the resolver is writing debug logs
#        and we redirect stdout/stderr    
#    def processEvents(self):
#      #time.sleep(0.2)
#      anim = [".","o","O","o"]
#      anim = ["\\","|","/","-","\\","|","/","-"]
#      self._process_events_tick += 1
#      if self._process_events_tick >= len(anim):
#          self._process_events_tick = 0
#      sys.stdout.write("[%s]" % anim[self._process_events_tick])
#      sys.stdout.flush()

    def confirmRestart(self):
      return self.askYesNoQuestion(_("Restart required"),
                                   _("To finish the upgrade, a restart is "
                                     "required.\n"
                                     "If you select 'y' the system "
                                     "will be restarted."), default='No')


if __name__ == "__main__":
  view = DistUpgradeViewText()

  #while True:
  #    view.processEvents()
  
  print(twrap("89 packages are going to be upgraded.\nYou have to download a total of 82.7M.\nThis download will take about 10 minutes with a 1Mbit DSL connection and about 3 hours 12 minutes with a 56k modem.", subsequent_indent=" "))
  #sys.exit(1)

  view = DistUpgradeViewText()
  print(view.askYesNoQuestion("hello", "Icecream?", "No"))
  print(view.askYesNoQuestion("hello", "Icecream?", "Yes"))
  

  #view.confirmChangesMessage = "89 packages are going to be upgraded.\n You have to download a total of 82.7M.\n This download will take about 10 minutes with a 1Mbit DSL connection and about 3 hours 12 minutes with a 56k modem."
  #view.confirmChanges("xx",[], 100)
  sys.exit(0)

  view.confirmRestart()

  cache = apt.Cache()
  fp = view.getAcquireProgress()
  ip = view.getInstallProgress(cache)


  for pkg in sys.argv[1:]:
    cache[pkg].mark_install()
  cache.commit(fp,ip)
  
  sys.exit(0)
  view.getTerminal().call(["/usr/bin/dpkg","--configure","-a"])
  #view.getTerminal().call(["ls","-R","/usr"])
  view.error("short","long",
             "asfds afsdj af asdf asdf asf dsa fadsf asdf as fasf sextended\n"
             "asfds afsdj af asdf asdf asf dsa fadsf asdf as fasf sextended\n"
             "asfds afsdj af asdf asdf asf dsa fadsf asdf as fasf sextended\n"
             "asfds afsdj af asdf asdf asf dsa fadsf asdf as fasf sextended\n"
             "asfds afsdj af asdf asdf asf dsa fadsf asdf as fasf sextended\n"
             "asfds afsdj af asdf asdf asf dsa fadsf asdf as fasf sextended\n"
             "asfds afsdj af asdf asdf asf dsa fadsf asdf as fasf sextended\n"
             )
  view.confirmChanges("xx",[], 100)
  print(view.askYesNoQuestion("hello", "Icecream?"))
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