Commit 7bf93524 authored by Nikos Skalkotos's avatar Nikos Skalkotos
Browse files

Add Output module for dialog-based output

parent bb4db5a8
# Copyright 2012 GRNET S.A. All rights reserved.
#
# Redistribution and use in source and binary forms, with or
# without modification, are permitted provided that the following
# conditions are met:
#
# 1. Redistributions of source code must retain the above
# copyright notice, this list of conditions and the following
# disclaimer.
#
# 2. Redistributions in binary form must reproduce the above
# copyright notice, this list of conditions and the following
# disclaimer in the documentation and/or other materials
# provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
# OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
# USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
#
# The views and conclusions contained in the software and
# documentation are those of the authors and should not be
# interpreted as representing official policies, either expressed
# or implied, of GRNET S.A.
from image_creator.output import Output
import time
import fcntl
class GaugeOutput(Output):
def __init__(self, dialog, title, msg=''):
self.d = dialog
self.msg = msg
self.percent = 0
self.d.gauge_start(self.msg, title=title)
# Open pipe workaround. A fork will dublicate the open file descriptor.
# The FD_CLOEXEC flag makes sure that the gauge internal fd will be
# closed if execve is executed. This is needed because libguestfs will
# fork/exec the kvm process. If this fd stays open in the kvm process,
# then doing a gauge_stop will make this process wait forever for
# a dialog process that is blocked waiting for input from the kvm
# process's open file descriptor.
fd = self.d._gauge_process['stdin'].fileno()
flags = fcntl.fcntl(fd, fcntl.F_GETFL, 0)
fcntl.fcntl(fd, fcntl.F_SETFD, flags | fcntl.FD_CLOEXEC)
def output(self, msg='', new_line=True):
self.msg = msg
self.percent = 0
self.d.gauge_update(self.percent, self.msg, update_text=True)
time.sleep(0.4)
def success(self, result, new_line=True):
self.percent = 100
self.d.gauge_update(self.percent, "%s %s" % (self.msg, result),
update_text=True)
time.sleep(0.4)
def warn(self, msg, new_line=True):
self.d.gauge_update(self.index, "%s Warning: %s" % (self.msg, msg),
update_text=True)
time.sleep(0.4)
def cleanup(self):
self.d.gauge_stop()
class _Progress(Output._Progress):
template = {
'default': '%(index)d/%(size)d',
'percent': '',
'b': "%(index)d/%(size)d B",
'kb': "%(index)d/%(size)d KB",
'mb': "%(index)d/%(size)d MB"
}
def __init__(self, size, title, bar_type='default'):
self.output.size = size
self.bar_type = bar_type
self.output.msg = "%s..." % title
self.goto(0)
def _postfix(self):
return self.template[self.bar_type] % self.output.__dict__
def goto(self, dest):
self.output.index = dest
self.output.percent = self.output.index * 100 // self.output.size
msg = "%s %s" % (self.output.msg, self._postfix())
self.output.d.gauge_update(self.output.percent, msg,
update_text=True)
def next(self):
self.goto(self.output.index + 1)
class InitializationOutput(GaugeOutput):
def __init__(self, dialog):
dialog.setBackgroundTitle('snf-image-creator')
super(InitializationOutput, self).__init__(dialog, "Initialization",
"Initializing...")
# vim: set sta sts=4 shiftwidth=4 sw=4 et ai :
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