code.grnet.gr Git - snf-image-creator/blob - image_creator/dialog_menu.py

   1 # -*- coding: utf-8 -*-
   2 #
   3 # Copyright 2012 GRNET S.A. All rights reserved.
   4 #
   5 # Redistribution and use in source and binary forms, with or
   6 # without modification, are permitted provided that the following
   7 # conditions are met:
   8 #
   9 #   1. Redistributions of source code must retain the above
  10 #      copyright notice, this list of conditions and the following
  11 #      disclaimer.
  12 #
  13 #   2. Redistributions in binary form must reproduce the above
  14 #      copyright notice, this list of conditions and the following
  15 #      disclaimer in the documentation and/or other materials
  16 #      provided with the distribution.
  17 #
  18 # THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
  19 # OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  20 # WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  21 # PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
  22 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  23 # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  24 # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
  25 # USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  26 # AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27 # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
  28 # ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29 # POSSIBILITY OF SUCH DAMAGE.
  30 #
  31 # The views and conclusions contained in the software and
  32 # documentation are those of the authors and should not be
  33 # interpreted as representing official policies, either expressed
  34 # or implied, of GRNET S.A.
  35
  36 """This module implements the "expert" mode of the dialog-based version of
  37 snf-image-creator.
  38 """
  39
  40 import os
  41 import textwrap
  42 import StringIO
  43
  44 from image_creator import __version__ as version
  45 from image_creator.util import MD5, FatalError
  46 from image_creator.output.dialog import GaugeOutput, InfoBoxOutput
  47 from image_creator.kamaki_wrapper import Kamaki, ClientError
  48 from image_creator.help import get_help_file
  49 from image_creator.dialog_util import SMALL_WIDTH, WIDTH, \
  50     update_background_title, confirm_reset, confirm_exit, Reset, \
  51     extract_image, extract_metadata_string
  52
  53 CONFIGURATION_TASKS = [
  54     ("Partition table manipulation", ["FixPartitionTable"],
  55         ["linux", "windows"]),
  56     ("File system resize",
  57         ["FilesystemResizeUnmounted", "FilesystemResizeMounted"],
  58         ["linux", "windows"]),
  59     ("Swap partition configuration", ["AddSwap"], ["linux"]),
  60     ("SSH keys removal", ["DeleteSSHKeys"], ["linux"]),
  61     ("Temporal RDP disabling", ["DisableRemoteDesktopConnections"],
  62         ["windows"]),
  63     ("SELinux relabeling at next boot", ["SELinuxAutorelabel"], ["linux"]),
  64     ("Hostname/Computer Name assignment", ["AssignHostname"],
  65         ["windows", "linux"]),
  66     ("Password change", ["ChangePassword"], ["windows", "linux"]),
  67     ("File injection", ["EnforcePersonality"], ["windows", "linux"])
  68 ]
  69
  70
  71 class MetadataMonitor(object):
  72     """Monitors image metadata chages"""
  73     def __init__(self, session, meta):
  74         self.session = session
  75         self.meta = meta
  76
  77     def __enter__(self):
  78         self.old = {}
  79         for (k, v) in self.meta.items():
  80             self.old[k] = v
  81
  82     def __exit__(self, type, value, traceback):
  83         d = self.session['dialog']
  84
  85         altered = {}
  86         added = {}
  87
  88         for (k, v) in self.meta.items():
  89             if k not in self.old:
  90                 added[k] = v
  91             elif self.old[k] != v:
  92                 altered[k] = v
  93
  94         if not (len(added) or len(altered)):
  95             return
  96
  97         msg = "The last action has changed some image properties:\n\n"
  98         if len(added):
  99             msg += "New image properties:\n"
 100             for (k, v) in added.items():
 101                 msg += '    %s: "%s"\n' % (k, v)
 102             msg += "\n"
 103         if len(altered):
 104             msg += "Updated image properties:\n"
 105             for (k, v) in altered.items():
 106                 msg += '    %s: "%s" -> "%s"\n' % (k, self.old[k], v)
 107             msg += "\n"
 108
 109         self.session['metadata'].update(added)
 110         self.session['metadata'].update(altered)
 111         d.msgbox(msg, title="Image Property Changes", width=SMALL_WIDTH)
 112
 113
 114 def upload_image(session):
 115     """Upload the image to pithos+"""
 116     d = session["dialog"]
 117     image = session['image']
 118     meta = session['metadata']
 119     size = image.size
 120
 121     if "account" not in session:
 122         d.msgbox("You need to provide your ~okeanos credentials before you "
 123                  "can upload images to pithos+", width=SMALL_WIDTH)
 124         return False
 125
 126     while 1:
 127         if 'upload' in session:
 128             init = session['upload']
 129         elif 'OS' in meta:
 130             init = "%s.diskdump" % meta['OS']
 131         else:
 132             init = ""
 133         (code, answer) = d.inputbox("Please provide a filename:", init=init,
 134                                     width=WIDTH)
 135
 136         if code in (d.DIALOG_CANCEL, d.DIALOG_ESC):
 137             return False
 138
 139         filename = answer.strip()
 140         if len(filename) == 0:
 141             d.msgbox("Filename cannot be empty", width=SMALL_WIDTH)
 142             continue
 143
 144         kamaki = Kamaki(session['account'], None)
 145         overwrite = []
 146         for f in (filename, "%s.md5sum" % filename, "%s.meta" % filename):
 147             if kamaki.object_exists(f):
 148                 overwrite.append(f)
 149
 150         if len(overwrite) > 0:
 151             if d.yesno("The following pithos object(s) already exist(s):\n"
 152                        "%s\nDo you want to overwrite them?" %
 153                        "\n".join(overwrite), width=WIDTH, defaultno=1):
 154                 continue
 155
 156         session['upload'] = filename
 157         break
 158
 159     gauge = GaugeOutput(d, "Image Upload", "Uploading...")
 160     try:
 161         out = image.out
 162         out.add(gauge)
 163         kamaki.out = out
 164         try:
 165             if 'checksum' not in session:
 166                 md5 = MD5(out)
 167                 session['checksum'] = md5.compute(image.device, size)
 168
 169             try:
 170                 # Upload image file
 171                 with open(image.device, 'rb') as f:
 172                     session["pithos_uri"] = \
 173                         kamaki.upload(f, size, filename,
 174                                       "Calculating block hashes",
 175                                       "Uploading missing blocks")
 176                 # Upload md5sum file
 177                 out.output("Uploading md5sum file...")
 178                 md5str = "%s %s\n" % (session['checksum'], filename)
 179                 kamaki.upload(StringIO.StringIO(md5str), size=len(md5str),
 180                               remote_path="%s.md5sum" % filename)
 181                 out.success("done")
 182
 183             except ClientError as e:
 184                 d.msgbox("Error in pithos+ client: %s" % e.message,
 185                          title="Pithos+ Client Error", width=SMALL_WIDTH)
 186                 if 'pithos_uri' in session:
 187                     del session['pithos_uri']
 188                 return False
 189         finally:
 190             out.remove(gauge)
 191     finally:
 192         gauge.cleanup()
 193
 194     d.msgbox("Image file `%s' was successfully uploaded to pithos+" % filename,
 195              width=SMALL_WIDTH)
 196
 197     return True
 198
 199
 200 def register_image(session):
 201     """Register image with cyclades"""
 202     d = session["dialog"]
 203
 204     is_public = False
 205
 206     if "account" not in session:
 207         d.msgbox("You need to provide your ~okeanos credentians before you "
 208                  "can register an images with cyclades", width=SMALL_WIDTH)
 209         return False
 210
 211     if "pithos_uri" not in session:
 212         d.msgbox("You need to upload the image to pithos+ before you can "
 213                  "register it with cyclades", width=SMALL_WIDTH)
 214         return False
 215
 216     while 1:
 217         (code, answer) = d.inputbox("Please provide a registration name:",
 218                                     width=WIDTH)
 219         if code in (d.DIALOG_CANCEL, d.DIALOG_ESC):
 220             return False
 221
 222         name = answer.strip()
 223         if len(name) == 0:
 224             d.msgbox("Registration name cannot be empty", width=SMALL_WIDTH)
 225             continue
 226
 227         ret = d.yesno("Make the image public?\\nA public image is accessible "
 228                       "by every user of the service.", defaultno=1,
 229                       width=WIDTH)
 230         if ret not in (0, 1):
 231             continue
 232
 233         is_public = True if ret == 0 else False
 234
 235         break
 236
 237     metadata = {}
 238     metadata.update(session['metadata'])
 239     if 'task_metadata' in session:
 240         for key in session['task_metadata']:
 241             metadata[key] = 'yes'
 242
 243     img_type = "public" if is_public else "private"
 244     gauge = GaugeOutput(d, "Image Registration", "Registering image...")
 245     try:
 246         out = session['image'].out
 247         out.add(gauge)
 248         try:
 249             try:
 250                 out.output("Registering %s image with Cyclades..." % img_type)
 251                 kamaki = Kamaki(session['account'], out)
 252                 kamaki.register(name, session['pithos_uri'], metadata,
 253                                 is_public)
 254                 out.success('done')
 255                 # Upload metadata file
 256                 out.output("Uploading metadata file...")
 257                 metastring = extract_metadata_string(session)
 258                 kamaki.upload(StringIO.StringIO(metastring),
 259                               size=len(metastring),
 260                               remote_path="%s.meta" % session['upload'])
 261                 out.success("done")
 262                 if is_public:
 263                     out.output("Sharing metadata and md5sum files...")
 264                     kamaki.share("%s.meta" % session['upload'])
 265                     kamaki.share("%s.md5sum" % session['upload'])
 266                     out.success('done')
 267             except ClientError as e:
 268                 d.msgbox("Error in pithos+ client: %s" % e.message)
 269                 return False
 270         finally:
 271             out.remove(gauge)
 272     finally:
 273         gauge.cleanup()
 274
 275     d.msgbox("%s image `%s' was successfully registered with Cyclades as `%s'"
 276              % (img_type.title(), session['upload'], name), width=SMALL_WIDTH)
 277     return True
 278
 279
 280 def kamaki_menu(session):
 281     """Show kamaki related actions"""
 282     d = session['dialog']
 283     default_item = "Account"
 284
 285     if 'account' not in session:
 286         token = Kamaki.get_token()
 287         if token:
 288             session['account'] = Kamaki.get_account(token)
 289             if not session['account']:
 290                 del session['account']
 291                 Kamaki.save_token('')  # The token was not valid. Remove it
 292
 293     while 1:
 294         account = session["account"]['username'] if "account" in session else \
 295             "<none>"
 296         upload = session["upload"] if "upload" in session else "<none>"
 297
 298         choices = [("Account", "Change your ~okeanos account: %s" % account),
 299                    ("Upload", "Upload image to pithos+"),
 300                    ("Register", "Register the image to cyclades: %s" % upload)]
 301
 302         (code, choice) = d.menu(
 303             text="Choose one of the following or press <Back> to go back.",
 304             width=WIDTH, choices=choices, cancel="Back", height=13,
 305             menu_height=5, default_item=default_item,
 306             title="Image Registration Menu")
 307
 308         if code in (d.DIALOG_CANCEL, d.DIALOG_ESC):
 309             return False
 310
 311         if choice == "Account":
 312             default_item = "Account"
 313             (code, answer) = d.inputbox(
 314                 "Please provide your ~okeanos authentication token:",
 315                 init=session["account"]['auth_token'] if "account" in session
 316                 else '', width=WIDTH)
 317             if code in (d.DIALOG_CANCEL, d.DIALOG_ESC):
 318                 continue
 319             if len(answer) == 0 and "account" in session:
 320                 del session["account"]
 321             else:
 322                 token = answer.strip()
 323                 session['account'] = Kamaki.get_account(token)
 324                 if session['account'] is not None:
 325                     Kamaki.save_token(token)
 326                     default_item = "Upload"
 327                 else:
 328                     del session['account']
 329                     d.msgbox("The token you provided is not valid!",
 330                              width=SMALL_WIDTH)
 331         elif choice == "Upload":
 332             if upload_image(session):
 333                 default_item = "Register"
 334             else:
 335                 default_item = "Upload"
 336         elif choice == "Register":
 337             if register_image(session):
 338                 return True
 339             else:
 340                 default_item = "Register"
 341
 342
 343 def add_property(session):
 344     """Add a new property to the image"""
 345     d = session['dialog']
 346
 347     while 1:
 348         (code, answer) = d.inputbox("Please provide a name for a new image"
 349                                     " property:", width=WIDTH)
 350         if code in (d.DIALOG_CANCEL, d.DIALOG_ESC):
 351             return False
 352
 353         name = answer.strip()
 354         if len(name) == 0:
 355             d.msgbox("A property name cannot be empty", width=SMALL_WIDTH)
 356             continue
 357
 358         break
 359
 360     while 1:
 361         (code, answer) = d.inputbox("Please provide a value for image "
 362                                     "property %s" % name, width=WIDTH)
 363         if code in (d.DIALOG_CANCEL, d.DIALOG_ESC):
 364             return False
 365
 366         value = answer.strip()
 367         if len(value) == 0:
 368             d.msgbox("Value cannot be empty", width=SMALL_WIDTH)
 369             continue
 370
 371         break
 372
 373     session['metadata'][name] = value
 374
 375     return True
 376
 377
 378 def modify_properties(session):
 379     """Modify an existing image property"""
 380     d = session['dialog']
 381
 382     while 1:
 383         choices = []
 384         for (key, val) in session['metadata'].items():
 385             choices.append((str(key), str(val)))
 386
 387         (code, choice) = d.menu(
 388             "In this menu you can edit existing image properties or add new "
 389             "ones. Be careful! Most properties have special meaning and "
 390             "alter the image deployment behaviour. Press <HELP> to see more "
 391             "information about image properties. Press <BACK> when done.",
 392             height=18, width=WIDTH, choices=choices, menu_height=10,
 393             ok_label="Edit", extra_button=1, extra_label="Add", cancel="Back",
 394             help_button=1, title="Image Properties")
 395
 396         if code in (d.DIALOG_CANCEL, d.DIALOG_ESC):
 397             return True
 398         # Edit button
 399         elif code == d.DIALOG_OK:
 400             (code, answer) = d.inputbox("Please provide a new value for the "
 401                                         "image property with name `%s':" %
 402                                         choice,
 403                                         init=session['metadata'][choice],
 404                                         width=WIDTH)
 405             if code not in (d.DIALOG_CANCEL, d.DIALOG_ESC):
 406                 value = answer.strip()
 407                 if len(value) == 0:
 408                     d.msgbox("Value cannot be empty!")
 409                     continue
 410                 else:
 411                     session['metadata'][choice] = value
 412         # ADD button
 413         elif code == d.DIALOG_EXTRA:
 414             add_property(session)
 415         elif code == 'help':
 416             help_file = get_help_file("image_properties")
 417             assert os.path.exists(help_file)
 418             d.textbox(help_file, title="Image Properties", width=70, height=40)
 419
 420
 421 def delete_properties(session):
 422     """Delete an image property"""
 423     d = session['dialog']
 424
 425     choices = []
 426     for (key, val) in session['metadata'].items():
 427         choices.append((key, "%s" % val, 0))
 428
 429     (code, to_delete) = d.checklist("Choose which properties to delete:",
 430                                     choices=choices, width=WIDTH)
 431
 432     # If the user exits with ESC or CANCEL, the returned tag list is empty.
 433     for i in to_delete:
 434         del session['metadata'][i]
 435
 436     cnt = len(to_delete)
 437     if cnt > 0:
 438         d.msgbox("%d image properties were deleted." % cnt, width=SMALL_WIDTH)
 439         return True
 440     else:
 441         return False
 442
 443
 444 def exclude_tasks(session):
 445     """Exclude specific tasks from running during image deployment"""
 446     d = session['dialog']
 447
 448     index = 0
 449     displayed_index = 1
 450     choices = []
 451     mapping = {}
 452     if 'excluded_tasks' not in session:
 453         session['excluded_tasks'] = []
 454
 455     if -1 in session['excluded_tasks']:
 456         if not d.yesno("Image deployment configuration is disabled. "
 457                        "Do you wish to enable it?", width=SMALL_WIDTH):
 458             session['excluded_tasks'].remove(-1)
 459         else:
 460             return False
 461
 462     for (msg, task, osfamily) in CONFIGURATION_TASKS:
 463         if session['metadata']['OSFAMILY'] in osfamily:
 464             checked = 1 if index in session['excluded_tasks'] else 0
 465             choices.append((str(displayed_index), msg, checked))
 466             mapping[displayed_index] = index
 467             displayed_index += 1
 468         index += 1
 469
 470     while 1:
 471         (code, tags) = d.checklist(
 472             text="Please choose which configuration tasks you would like to "
 473                  "prevent from running during image deployment. "
 474                  "Press <No Config> to supress any configuration. "
 475                  "Press <Help> for more help on the image deployment "
 476                  "configuration tasks.",
 477             choices=choices, height=19, list_height=8, width=WIDTH,
 478             help_button=1, extra_button=1, extra_label="No Config",
 479             title="Exclude Configuration Tasks")
 480
 481         if code in (d.DIALOG_CANCEL, d.DIALOG_ESC):
 482             return False
 483         elif code == d.DIALOG_HELP:
 484             help_file = get_help_file("configuration_tasks")
 485             assert os.path.exists(help_file)
 486             d.textbox(help_file, title="Configuration Tasks",
 487                       width=70, height=40)
 488         # No Config button
 489         elif code == d.DIALOG_EXTRA:
 490             session['excluded_tasks'] = [-1]
 491             session['task_metadata'] = ["EXCLUDE_ALL_TASKS"]
 492             break
 493         elif code == d.DIALOG_OK:
 494             session['excluded_tasks'] = []
 495             for tag in tags:
 496                 session['excluded_tasks'].append(mapping[int(tag)])
 497
 498             exclude_metadata = []
 499             for task in session['excluded_tasks']:
 500                 exclude_metadata.extend(CONFIGURATION_TASKS[task][1])
 501
 502             session['task_metadata'] = map(lambda x: "EXCLUDE_TASK_%s" % x,
 503                                            exclude_metadata)
 504             break
 505
 506     return True
 507
 508
 509 def sysprep(session):
 510     """Perform various system preperation tasks on the image"""
 511     d = session['dialog']
 512     image = session['image']
 513
 514     # Is the image already shrinked?
 515     if 'shrinked' in session and session['shrinked']:
 516         msg = "It seems you have shrinked the image. Running system " \
 517               "preparation tasks on a shrinked image is dangerous."
 518
 519         if d.yesno("%s\n\nDo you really want to continue?" % msg,
 520                    width=SMALL_WIDTH, defaultno=1):
 521             return
 522
 523     wrapper = textwrap.TextWrapper(width=WIDTH - 5)
 524
 525     help_title = "System Preperation Tasks"
 526     sysprep_help = "%s\n%s\n\n" % (help_title, '=' * len(help_title))
 527
 528     syspreps = image.os.list_syspreps()
 529
 530     if len(syspreps) == 0:
 531         d.msgbox("No system preparation task available to run!",
 532                  title="System Preperation", width=SMALL_WIDTH)
 533         return
 534
 535     while 1:
 536         choices = []
 537         index = 0
 538         for sysprep in syspreps:
 539             name, descr = image.os.sysprep_info(sysprep)
 540             display_name = name.replace('-', ' ').capitalize()
 541             sysprep_help += "%s\n" % display_name
 542             sysprep_help += "%s\n" % ('-' * len(display_name))
 543             sysprep_help += "%s\n\n" % wrapper.fill(" ".join(descr.split()))
 544             enabled = 1 if sysprep.enabled else 0
 545             choices.append((str(index + 1), display_name, enabled))
 546             index += 1
 547
 548         (code, tags) = d.checklist(
 549             "Please choose which system preparation tasks you would like to "
 550             "run on the image. Press <Help> to see details about the system "
 551             "preparation tasks.", title="Run system preparation tasks",
 552             choices=choices, width=70, ok_label="Run", help_button=1)
 553
 554         if code in (d.DIALOG_CANCEL, d.DIALOG_ESC):
 555             return False
 556         elif code == d.DIALOG_HELP:
 557             d.scrollbox(sysprep_help, width=WIDTH)
 558         elif code == d.DIALOG_OK:
 559             # Enable selected syspreps and disable the rest
 560             for i in range(len(syspreps)):
 561                 if str(i + 1) in tags:
 562                     image.os.enable_sysprep(syspreps[i])
 563                 else:
 564                     image.os.disable_sysprep(syspreps[i])
 565
 566             if len([s for s in image.os.list_syspreps() if s.enabled]) == 0:
 567                 d.msgbox("No system preperation task is selected!",
 568                          title="System Preperation", width=SMALL_WIDTH)
 569                 continue
 570
 571             infobox = InfoBoxOutput(d, "Image Configuration")
 572             try:
 573                 image.out.add(infobox)
 574                 try:
 575                     # The checksum is invalid. We have mounted the image rw
 576                     if 'checksum' in session:
 577                         del session['checksum']
 578
 579                     # Monitor the metadata changes during syspreps
 580                     with MetadataMonitor(session, image.os.meta):
 581                         try:
 582                             image.os.do_sysprep()
 583                             infobox.finalize()
 584                         except FatalError as e:
 585                             title = "System Preparation"
 586                             d.msgbox("System Preparation failed: %s" % e,
 587                                      title=title, width=SMALL_WIDTH)
 588                 finally:
 589                     image.out.remove(infobox)
 590             finally:
 591                 infobox.cleanup()
 592             break
 593     return True
 594
 595
 596 def shrink(session):
 597     """Shrink the image"""
 598     d = session['dialog']
 599     image = session['image']
 600
 601     shrinked = 'shrinked' in session and session['shrinked']
 602
 603     if shrinked:
 604         d.msgbox("The image is already shrinked!", title="Image Shrinking",
 605                  width=SMALL_WIDTH)
 606         return True
 607
 608     msg = "This operation will shrink the last partition of the image to " \
 609           "reduce the total image size. If the last partition is a swap " \
 610           "partition, then this partition is removed and the partition " \
 611           "before that is shrinked. The removed swap partition will be " \
 612           "recreated during image deployment."
 613
 614     if not d.yesno("%s\n\nDo you want to continue?" % msg, width=WIDTH,
 615                    height=12, title="Image Shrinking"):
 616         with MetadataMonitor(session, image.meta):
 617             infobox = InfoBoxOutput(d, "Image Shrinking", height=4)
 618             image.out.add(infobox)
 619             try:
 620                 image.shrink()
 621                 infobox.finalize()
 622             finally:
 623                 image.out.remove(infobox)
 624
 625         session['shrinked'] = True
 626         update_background_title(session)
 627     else:
 628         return False
 629
 630     return True
 631
 632
 633 def customization_menu(session):
 634     """Show image customization menu"""
 635     d = session['dialog']
 636
 637     choices = [("Sysprep", "Run various image preparation tasks"),
 638                ("Shrink", "Shrink image"),
 639                ("View/Modify", "View/Modify image properties"),
 640                ("Delete", "Delete image properties"),
 641                ("Exclude", "Exclude various deployment tasks from running")]
 642
 643     default_item = 0
 644
 645     actions = {"Sysprep": sysprep,
 646                "Shrink": shrink,
 647                "View/Modify": modify_properties,
 648                "Delete": delete_properties,
 649                "Exclude": exclude_tasks}
 650     while 1:
 651         (code, choice) = d.menu(
 652             text="Choose one of the following or press <Back> to exit.",
 653             width=WIDTH, choices=choices, cancel="Back", height=13,
 654             menu_height=len(choices), default_item=choices[default_item][0],
 655             title="Image Customization Menu")
 656
 657         if code in (d.DIALOG_CANCEL, d.DIALOG_ESC):
 658             break
 659         elif choice in actions:
 660             default_item = [entry[0] for entry in choices].index(choice)
 661             if actions[choice](session):
 662                 default_item = (default_item + 1) % len(choices)
 663
 664
 665 def main_menu(session):
 666     """Show the main menu of the program"""
 667     d = session['dialog']
 668
 669     update_background_title(session)
 670
 671     choices = [("Customize", "Customize image & ~okeanos deployment options"),
 672                ("Register", "Register image to ~okeanos"),
 673                ("Extract", "Dump image to local file system"),
 674                ("Reset", "Reset everything and start over again"),
 675                ("Help", "Get help for using snf-image-creator")]
 676
 677     default_item = "Customize"
 678
 679     actions = {"Customize": customization_menu, "Register": kamaki_menu,
 680                "Extract": extract_image}
 681     while 1:
 682         (code, choice) = d.menu(
 683             text="Choose one of the following or press <Exit> to exit.",
 684             width=WIDTH, choices=choices, cancel="Exit", height=13,
 685             default_item=default_item, menu_height=len(choices),
 686             title="Image Creator for ~okeanos (snf-image-creator version %s)" %
 687                   version)
 688
 689         if code in (d.DIALOG_CANCEL, d.DIALOG_ESC):
 690             if confirm_exit(d):
 691                 break
 692         elif choice == "Reset":
 693             if confirm_reset(d):
 694                 d.infobox("Resetting snf-image-creator. Please wait...",
 695                           width=SMALL_WIDTH)
 696                 raise Reset
 697         elif choice == "Help":
 698             d.msgbox("For help, check the online documentation:\n\nhttp://www"
 699                      ".synnefo.org/docs/snf-image-creator/latest/",
 700                      width=WIDTH, title="Help")
 701         elif choice in actions:
 702             actions[choice](session)
 703
 704 # vim: set sta sts=4 shiftwidth=4 sw=4 et ai :