Synnefo » snf-image-creator

#!/usr/bin/env python

# Copyright 2012 GRNET S.A. All rights reserved.

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import dialog

import sys

import os

import textwrap

import signal

from image_creator import __version__ as version

from image_creator.util import FatalError, MD5

from image_creator.output.dialog import InitializationOutput

from image_creator.disk import Disk

from image_creator.os_type import os_cls

MSGBOX_WIDTH = 60

YESNO_WIDTH = 50

MENU_WIDTH = 70

class Reset(Exception):

    pass

def confirm_exit(d, msg=''):

    return not d.yesno("%s Do you want to exit?" % msg, width=YESNO_WIDTH)

def confirm_reset(d):

    return not d.yesno(

        "Are you sure you want to reset everything?",

        width=YESNO_WIDTH)

def upload_image(session):

    d = session["dialog"]

    if "account" not in session:

        d.msgbox("You need to provide your ~okeanos login username before you "

                 "can upload images to pithos+", width=MSGBOX_WIDTH)

        return False

    if "token" not in session:

        d.msgbox("You need to provide your ~okeanos account authentication "

                 "token before you can upload images to pithos+",

                 width=MSGBOX_WIDTH)

        return False

    while 1:

        (code, answer) = d.inputbox("Please provide a filename:",

                        init=session["upload"] if "upload" in session else '')

        if code in (d.DIALOG_CANCEL, d.DIALOG_ESC):

            return False

        answer = answer.strip()

        if len(answer) == 0:

            d.msgbox("Filename cannot be empty", width=MSGBOX_WIDTH)

            continue

        session["upload"] = answer

        return True

def register_image(session):

    d = session["dialog"]

    if "account" not in session:

        d.msgbox("You need to provide your ~okeanos login username before you "

                 "can register an images to cyclades",

                 width=MSGBOX_WIDTH)

        return False

    if "token" not in session:

        d.msgbox("You need to provide your ~okeanos account authentication "

                 "token before you can register an images to cyclades",

                 width=MSGBOX_WIDTH)

        return False

    if "upload" not in session:

        d.msgbox("You need to have an image uploaded to pithos+ before you "

                 "can register it to cyclades",

                 width=MSGBOX_WIDTH)

        return False

    return True

def kamaki_menu(session):

    d = session['dialog']

    default_item = "Account"

    while 1:

        account = session["account"] if "account" in session else "<none>"

        token = session["token"] if "token" in session else "<none>"

        upload = session["upload"] if "upload" in session else "<none>"

        (code, choice) = d.menu(

            "Choose one of the following or press <Back> to go back.",

            width=MENU_WIDTH,

            choices=[("Account", "Change your ~okeanos username: %s" %

                      account),

                     ("Token", "Change your ~okeanos token: %s" %

                      token),

                     ("Upload", "Upload image to pithos+"),

                     ("Register", "Register image to cyclades: %s" % upload)],

            cancel="Back",

            default_item=default_item,

            title="Image Registration Menu")

        if code in (d.DIALOG_CANCEL, d.DIALOG_ESC):

            return False

        if choice == "Account":

            default_item = "Account"

            (code, answer) = d.inputbox(

                "Please provide your ~okeanos account e-mail address:",

                init=session["account"] if "account" in session else '',

                width=70)

            if code in (d.DIALOG_CANCEL, d.DIALOG_ESC):

                continue

            if len(answer) == 0 and "account" in session:

                    del session["account"]

            else:

                session["account"] = answer.strip()

                default_item = "Token"

        elif choice == "Token":

            default_item = "Token"

            (code, answer) = d.inputbox(

                "Please provide your ~okeanos account authetication token:",

                init=session["token"] if "token" in session else '',

                width=70)

            if code in (d.DIALOG_CANCEL, d.DIALOG_ESC):

                continue

            if len(answer) == 0 and "token" in session:

                del session["token"]

            else:

                session["token"] = answer.strip()

                default_item = "Upload"

        elif choice == "Upload":

            if upload_image(session):

                default_item = "Register"

            else:

                default_item = "Upload"

        elif choice == "Register":

            if register_image(session):

                return True

            else:

                default_item = "Register"

def main_menu(session):

    d = session['dialog']

    dev = session['device']

    d.setBackgroundTitle("OS: %s, Distro: %s" % (dev.ostype, dev.distro))

    actions = {"Register": kamaki_menu}

    default_item = "Customize"

    while 1:

        (code, choice) = d.menu(

            "Choose one of the following or press <Exit> to exit.",

            width=MENU_WIDTH,

            choices=[("Customize", "Run various image customization tasks"),

                     ("Deploy", "Configure ~okeanos image deployment options"),

                     ("Register", "Register image to ~okeanos"),

                     ("Extract", "Dump image to local file system"),

                     ("Reset", "Reset everything and start over again"),

                     ("Help", "Get help for using snf-image-creator")],

            cancel="Exit",

            default_item=default_item,

            title="Image Creator for ~okeanos (snf-image-creator version %s)" %

                  version)

        if code in (d.DIALOG_CANCEL, d.DIALOG_ESC):

            if confirm_exit(d):

                break

            else:

                continue

        if choice == "Reset":

            if confirm_reset(d):

                d.infobox("Resetting snf-image-creator. Please wait...")

                raise Reset

            else:

                continue

        elif choice in actions:

            actions[choice](session)

def select_file(d):

    root = os.sep

    while 1:

        (code, path) = d.fselect(root, 10, 50,

                                 title="Please select input media")

        if code in (d.DIALOG_CANCEL, d.DIALOG_ESC):

            if confirm_exit(d, "You canceled the media selection dialog box."):

                sys.exit(0)

            else:

                continue

        if not os.path.exists(path):

            d.msgbox("The file you choose does not exist", width=MSGBOX_WIDTH)

            continue

        else:

            break

    return path

def collect_metadata(dev, out):

    dev.mount(readonly=True)

    out.output("Collecting image metadata...")

    cls = os_cls(dev.distro, dev.ostype)

    image_os = cls(dev.root, dev.g, out)

    out.success("done")

    dev.umount()

    return image_os.meta

def image_creator(d):

    basename = os.path.basename(sys.argv[0])

    usage = "Usage: %s [input_media]" % basename

    if len(sys.argv) > 2:

        sys.stderr.write("%s\n" % usage)

        return 1

    if os.geteuid() != 0:

        raise FatalError("You must run %s as root" % basename)

    media = sys.argv[1] if len(sys.argv) == 2 else select_file(d)

    out = InitializationOutput(d)

    disk = Disk(media, out)

    def signal_handler(signum, fram):

        out.cleanup()

        disk.cleanup()

    signal.signal(signal.SIGINT, signal_handler)

    try:

        snapshot = disk.snapshot()

        dev = disk.get_device(snapshot)

        metadata = collect_metadata(dev, out)

        out.cleanup()

        # Make sure the signal handler does not call out.cleanup again

        def dummy(self):

            pass

        instancemethod = type(InitializationOutput.cleanup)

        out.cleanup = instancemethod(dummy, out, InitializationOutput)

        session = {"dialog": d,

                   "disk": disk,

                   "device": dev,

                   "metadata": metadata}

        main_menu(session)

        d.infobox("Thank you for using snf-image-creator. Bye", width=53)

    finally:

        disk.cleanup()

    return 0

def main():

    d = dialog.Dialog(dialog="dialog")

    while 1:

        try:

            try:

                ret = image_creator(d)

                sys.exit(ret)

            except FatalError as e:

                msg = textwrap.fill(str(e), width=70)

                d.infobox(msg, width=70, title="Fatal Error")

                sys.exit(1)

        except Reset:

            continue

# vim: set sta sts=4 shiftwidth=4 sw=4 et ai :

    packages=['image_creator', 'image_creator.os_type',

              'image_creator.output'],

        'console_scripts': [

                'snf-image-creator = image_creator.main:main',

                'snf-image-creator-dialog = image_creator.dialog_main:main']

# vim: set sta sts=4 shiftwidth=4 sw=4 et ai :