root / image_creator / dialog_main.py @ 5ff2dceb
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#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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#
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# Copyright 2012 GRNET S.A. All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or
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# without modification, are permitted provided that the following
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# conditions are met:
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#
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# 1. Redistributions of source code must retain the above
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# copyright notice, this list of conditions and the following
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# disclaimer.
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#
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# 2. Redistributions in binary form must reproduce the above
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# copyright notice, this list of conditions and the following
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# disclaimer in the documentation and/or other materials
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# provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
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# OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
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# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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# USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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#
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# The views and conclusions contained in the software and
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# documentation are those of the authors and should not be
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# interpreted as representing official policies, either expressed
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# or implied, of GRNET S.A.
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"""This module is the entrance point for the dialog-based version of the
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snf-image-creator program. The main function will create a dialog where the
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user is asked if he wants to use the program in expert or wizard mode.
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"""
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import dialog |
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import sys |
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import os |
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import stat |
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import textwrap |
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import signal |
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import optparse |
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import types |
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from image_creator import __version__ as version |
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from image_creator.util import FatalError |
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from image_creator.output import Output |
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from image_creator.output.cli import SimpleOutput |
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from image_creator.output.dialog import GaugeOutput |
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from image_creator.output.composite import CompositeOutput |
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from image_creator.disk import Disk |
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from image_creator.dialog_wizard import start_wizard |
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from image_creator.dialog_menu import main_menu |
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from image_creator.dialog_util import SMALL_WIDTH, WIDTH, confirm_exit, \ |
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Reset, update_background_title |
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def create_image(d, media, out, tmp): |
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"""Create an image out of `media'"""
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d.setBackgroundTitle('snf-image-creator')
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gauge = GaugeOutput(d, "Initialization", "Initializing...") |
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out.add(gauge) |
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disk = Disk(media, out, tmp) |
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def signal_handler(signum, frame): |
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gauge.cleanup() |
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disk.cleanup() |
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signal.signal(signal.SIGINT, signal_handler) |
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signal.signal(signal.SIGTERM, signal_handler) |
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try:
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snapshot = disk.snapshot() |
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image = disk.get_image(snapshot) |
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out.output("Collecting image metadata ...")
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metadata = {} |
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for (key, value) in image.meta.items(): |
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metadata[str(key)] = str(value) |
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for (key, value) in image.os.meta.items(): |
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metadata[str(key)] = str(value) |
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out.success("done")
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gauge.cleanup() |
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out.remove(gauge) |
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# Make sure the signal handler does not call gauge.cleanup again
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def dummy(self): |
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pass
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gauge.cleanup = type(GaugeOutput.cleanup)(dummy, gauge, GaugeOutput)
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session = {"dialog": d,
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"disk": disk,
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"image": image,
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"metadata": metadata}
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msg = "snf-image-creator detected a %s system on the input media. " \
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"Would you like to run a wizard to assist you through the " \
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"image creation process?\n\nChoose <Wizard> to run the wizard," \
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" <Expert> to run the snf-image-creator in expert mode or " \
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"press ESC to quit the program." \
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% (image.ostype if image.ostype == image.distro or |
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image.distro == "unknown" else "%s (%s)" % |
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(image.ostype, image.distro)) |
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update_background_title(session) |
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while True: |
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code = d.yesno(msg, width=WIDTH, height=12, yes_label="Wizard", |
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no_label="Expert")
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if code == d.DIALOG_OK:
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if start_wizard(session):
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break
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elif code == d.DIALOG_CANCEL:
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main_menu(session) |
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break
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if confirm_exit(d):
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break
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d.infobox("Thank you for using snf-image-creator. Bye", width=53) |
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finally:
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disk.cleanup() |
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return 0 |
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def select_file(d, media): |
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"""Select a media file"""
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if media == '/': |
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return '/' |
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default = os.getcwd() + os.sep |
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while 1: |
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if media is not None: |
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if not os.path.exists(media): |
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d.msgbox("The file `%s' you choose does not exist." % media,
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width=SMALL_WIDTH) |
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else:
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mode = os.stat(media).st_mode |
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if not stat.S_ISDIR(mode): |
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break
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default = media |
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(code, media) = d.fselect(default, 10, 60, extra_button=1, |
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title="Please select an input media.",
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extra_label="Bundle Host")
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if code in (d.DIALOG_CANCEL, d.DIALOG_ESC): |
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if confirm_exit(d, "You canceled the media selection dialog box."): |
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sys.exit(0)
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else:
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media = None
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continue
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elif code == d.DIALOG_EXTRA:
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return '/' |
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return media
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def _dialog_form(self, text, height=20, width=60, form_height=15, fields=[], |
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**kwargs): |
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"""Display a form box.
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fields is in the form: [(label1, item1, item_length1), ...]
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"""
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cmd = ["--form", text, str(height), str(width), str(form_height)] |
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label_len = 0
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for field in fields: |
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if len(field[0]) > label_len: |
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label_len = len(field[0]) |
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input_len = width - label_len - 1
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line = 1
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for field in fields: |
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label = field[0]
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item = field[1]
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item_len = field[2]
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cmd.extend((label, str(line), str(1), item, str(line), |
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str(label_len + 1), str(input_len), str(item_len))) |
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line += 1
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code, output = self._perform(*(cmd,), **kwargs)
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if not output: |
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return (code, [])
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return (code, output.splitlines())
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def main(): |
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# In OpenSUSE dialog is buggy under xterm
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if os.environ['TERM'] == 'xterm': |
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os.environ['TERM'] = 'linux' |
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d = dialog.Dialog(dialog="dialog")
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# Add extra button in dialog library
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dialog._common_args_syntax["extra_button"] = \
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lambda enable: dialog._simple_option("--extra-button", enable) |
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dialog._common_args_syntax["extra_label"] = \
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lambda string: ("--extra-label", string) |
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# Allow yes-no label overwriting
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dialog._common_args_syntax["yes_label"] = \
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lambda string: ("--yes-label", string) |
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dialog._common_args_syntax["no_label"] = \
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lambda string: ("--no-label", string) |
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# Monkey-patch pythondialog to include support for form dialog boxes
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if not hasattr(dialog, 'form'): |
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d.form = types.MethodType(_dialog_form, d) |
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usage = "Usage: %prog [options] [<input_media>]"
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parser = optparse.OptionParser(version=version, usage=usage) |
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parser.add_option("-l", "--logfile", type="string", dest="logfile", |
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default=None, help="log all messages to FILE", |
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metavar="FILE")
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parser.add_option("--tmpdir", type="string", dest="tmp", default=None, |
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help="create large temporary image files under DIR",
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metavar="DIR")
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options, args = parser.parse_args(sys.argv[1:])
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if len(args) > 1: |
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parser.error("Wrong number of arguments")
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d.setBackgroundTitle('snf-image-creator')
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try:
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if os.geteuid() != 0: |
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raise FatalError("You must run %s as root" % |
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parser.get_prog_name()) |
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if options.tmp is not None and not os.path.isdir(options.tmp): |
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raise FatalError("The directory `%s' specified with --tmpdir is " |
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"not valid" % options.tmp)
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logfile = None
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if options.logfile is not None: |
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try:
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logfile = open(options.logfile, 'w') |
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except IOError as e: |
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raise FatalError(
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"Unable to open logfile `%s' for writing. Reason: %s" %
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(options.logfile, e.strerror)) |
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media = select_file(d, args[0] if len(args) == 1 else None) |
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try:
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log = SimpleOutput(False, logfile) if logfile is not None \ |
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else Output()
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while 1: |
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try:
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out = CompositeOutput([log]) |
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out.output("Starting %s v%s ..." %
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(parser.get_prog_name(), version)) |
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ret = create_image(d, media, out, options.tmp) |
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sys.exit(ret) |
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except Reset:
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log.output("Resetting everything ...")
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continue
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finally:
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if logfile is not None: |
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logfile.close() |
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except FatalError as e: |
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msg = textwrap.fill(str(e), width=WIDTH)
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d.infobox(msg, width=WIDTH, title="Fatal Error")
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sys.exit(1)
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# vim: set sta sts=4 shiftwidth=4 sw=4 et ai :
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