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

   1 #!/usr/bin/env python
   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 import os
  37 import textwrap
  38 import StringIO
  39
  40 from image_creator import __version__ as version
  41 from image_creator.util import MD5
  42 from image_creator.output.dialog import GaugeOutput, InfoBoxOutput
  43 from image_creator.kamaki_wrapper import Kamaki, ClientError
  44 from image_creator.help import get_help_file
  45 from image_creator.dialog_util import SMALL_WIDTH, WIDTH, \
  46     update_background_title, confirm_reset, confirm_exit, Reset, \
  47     extract_image, extract_metadata_string
  48
  49 CONFIGURATION_TASKS = [
  50     ("Partition table manipulation", ["FixPartitionTable"],
  51         ["linux", "windows"]),
  52     ("File system resize",
  53         ["FilesystemResizeUnmounted", "FilesystemResizeMounted"],
  54         ["linux", "windows"]),
  55     ("Swap partition configuration", ["AddSwap"], ["linux"]),
  56     ("SSH keys removal", ["DeleteSSHKeys"], ["linux"]),
  57     ("Temporal RDP disabling", ["DisableRemoteDesktopConnections"],
  58         ["windows"]),
  59     ("SELinux relabeling at next boot", ["SELinuxAutorelabel"], ["linux"]),
  60     ("Hostname/Computer Name assignment", ["AssignHostname"],
  61         ["windows", "linux"]),
  62     ("Password change", ["ChangePassword"], ["windows", "linux"]),
  63     ("File injection", ["EnforcePersonality"], ["windows", "linux"])
  64 ]
  65
  66
  67 class MetadataMonitor(object):
  68     """Monitors image metadata chages"""
  69     def __init__(self, session, meta):
  70         self.session = session
  71         self.meta = meta
  72
  73     def __enter__(self):
  74         self.old = {}
  75         for (k, v) in self.meta.items():
  76             self.old[k] = v
  77
  78     def __exit__(self, type, value, traceback):
  79         d = self.session['dialog']
  80
  81         altered = {}
  82         added = {}
  83
  84         for (k, v) in self.meta.items():
  85             if k not in self.old:
  86                 added[k] = v
  87             elif self.old[k] != v:
  88                 altered[k] = v
  89
  90         if not (len(added) or len(altered)):
  91             return
  92
  93         msg = "The last action has changed some image properties:\n\n"
  94         if len(added):
  95             msg += "New image properties:\n"
  96             for (k, v) in added.items():
  97                 msg += '    %s: "%s"\n' % (k, v)
  98             msg += "\n"
  99         if len(altered):
 100             msg += "Updated image properties:\n"
 101             for (k, v) in altered.items():
 102                 msg += '    %s: "%s" -> "%s"\n' % (k, self.old[k], v)
 103             msg += "\n"
 104
 105         self.session['metadata'].update(added)
 106         self.session['metadata'].update(altered)
 107         d.msgbox(msg, title="Image Property Changes", width=SMALL_WIDTH)
 108
 109
 110 def upload_image(session):
 111     """Upload the image to pithos+"""
 112     d = session["dialog"]
 113     image = session['image']
 114     meta = session['metadata']
 115     size = image.size
 116
 117     if "account" not in session:
 118         d.msgbox("You need to provide your ~okeanos credentials before you "
 119                  "can upload images to pithos+", width=SMALL_WIDTH)
 120         return False
 121
 122     while 1:
 123         if 'upload' in session:
 124             init = session['upload']
 125         elif 'OS' in meta:
 126             init = "%s.diskdump" % meta['OS']
 127         else:
 128             init = ""
 129         (code, answer) = d.inputbox("Please provide a filename:", init=init,
 130                                     width=WIDTH)
 131
 132         if code in (d.DIALOG_CANCEL, d.DIALOG_ESC):
 133             return False
 134
 135         filename = answer.strip()
 136         if len(filename) == 0:
 137             d.msgbox("Filename cannot be empty", width=SMALL_WIDTH)
 138             continue
 139
 140         kamaki = Kamaki(session['account'], None)
 141         overwrite = []
 142         for f in (filename, "%s.md5sum" % filename, "%s.meta" % filename):
 143             if kamaki.object_exists(f):
 144                 overwrite.append(f)
 145
 146         if len(overwrite) > 0:
 147             if d.yesno("The following pithos object(s) already exist(s):\n"
 148                        "%s\nDo you want to overwrite them?" %
 149                        "\n".join(overwrite), width=WIDTH, defaultno=1):
 150                 continue
 151
 152         session['upload'] = filename
 153         break
 154
 155     gauge = GaugeOutput(d, "Image Upload", "Uploading...")
 156     try:
 157         out = image.out
 158         out.add(gauge)
 159         kamaki.out = out
 160         try:
 161             if 'checksum' not in session:
 162                 md5 = MD5(out)
 163                 session['checksum'] = md5.compute(image.device, size)
 164
 165             try:
 166                 # Upload image file
 167                 with open(image.device, 'rb') as f:
 168                     session["pithos_uri"] = \
 169                         kamaki.upload(f, size, filename,
 170                                       "Calculating block hashes",
 171                                       "Uploading missing blocks")
 172                 # Upload md5sum file
 173                 out.output("Uploading md5sum file...")
 174                 md5str = "%s %s\n" % (session['checksum'], filename)
 175                 kamaki.upload(StringIO.StringIO(md5str), size=len(md5str),
 176                               remote_path="%s.md5sum" % filename)
 177                 out.success("done")
 178
 179             except ClientError as e:
 180                 d.msgbox("Error in pithos+ client: %s" % e.message,
 181                          title="Pithos+ Client Error", width=SMALL_WIDTH)
 182                 if 'pithos_uri' in session:
 183                     del session['pithos_uri']
 184                 return False
 185         finally:
 186             out.remove(gauge)
 187     finally:
 188         gauge.cleanup()
 189
 190     d.msgbox("Image file `%s' was successfully uploaded to pithos+" % filename,
 191              width=SMALL_WIDTH)
 192
 193     return True
 194
 195
 196 def register_image(session):
 197     """Register image with cyclades"""
 198     d = session["dialog"]
 199
 200     is_public = False
 201
 202     if "account" not in session:
 203         d.msgbox("You need to provide your ~okeanos credentians before you "
 204                  "can register an images with cyclades", width=SMALL_WIDTH)
 205         return False
 206
 207     if "pithos_uri" not in session:
 208         d.msgbox("You need to upload the image to pithos+ before you can "
 209                  "register it with cyclades", width=SMALL_WIDTH)
 210         return False
 211
 212     while 1:
 213         (code, answer) = d.inputbox("Please provide a registration name:",
 214                                     width=WIDTH)
 215         if code in (d.DIALOG_CANCEL, d.DIALOG_ESC):
 216             return False
 217
 218         name = answer.strip()
 219         if len(name) == 0:
 220             d.msgbox("Registration name cannot be empty", width=SMALL_WIDTH)
 221             continue
 222
 223         ret = d.yesno("Make the image public?\\nA public image is accessible "
 224                       "by every user of the service.", defaultno=1,
 225                       width=WIDTH)
 226         if ret not in (0, 1):
 227             continue
 228
 229         is_public = True if ret == 0 else False
 230
 231         break
 232
 233     metadata = {}
 234     metadata.update(session['metadata'])
 235     if 'task_metadata' in session:
 236         for key in session['task_metadata']:
 237             metadata[key] = 'yes'
 238
 239     img_type = "public" if is_public else "private"
 240     gauge = GaugeOutput(d, "Image Registration", "Registering image...")
 241     try:
 242         out = session['image'].out
 243         out.add(gauge)
 244         try:
 245             try:
 246                 out.output("Registering %s image with Cyclades..." % img_type)
 247                 kamaki = Kamaki(session['account'], out)
 248                 kamaki.register(name, session['pithos_uri'], metadata,
 249                                 is_public)
 250                 out.success('done')
 251                 # Upload metadata file
 252                 out.output("Uploading metadata file...")
 253                 metastring = extract_metadata_string(session)
 254                 kamaki.upload(StringIO.StringIO(metastring),
 255                               size=len(metastring),
 256                               remote_path="%s.meta" % session['upload'])
 257                 out.success("done")
 258                 if is_public:
 259                     out.output("Sharing metadata and md5sum files...")
 260                     kamaki.share("%s.meta" % session['upload'])
 261                     kamaki.share("%s.md5sum" % session['upload'])
 262                     out.success('done')
 263             except ClientError as e:
 264                 d.msgbox("Error in pithos+ client: %s" % e.message)
 265                 return False
 266         finally:
 267             out.remove(gauge)
 268     finally:
 269         gauge.cleanup()
 270
 271     d.msgbox("%s image `%s' was successfully registered with Cyclades as `%s'"
 272              % (img_type.title(), session['upload'], name), width=SMALL_WIDTH)
 273     return True
 274
 275
 276 def kamaki_menu(session):
 277     """Show kamaki related actions"""
 278     d = session['dialog']
 279     default_item = "Account"
 280
 281     if 'account' not in session:
 282         token = Kamaki.get_token()
 283         if token:
 284             session['account'] = Kamaki.get_account(token)
 285             if not session['account']:
 286                 del session['account']
 287                 Kamaki.save_token('')  # The token was not valid. Remove it
 288
 289     while 1:
 290         account = session["account"]['username'] if "account" in session else \
 291             "<none>"
 292         upload = session["upload"] if "upload" in session else "<none>"
 293
 294         choices = [("Account", "Change your ~okeanos account: %s" % account),
 295                    ("Upload", "Upload image to pithos+"),
 296                    ("Register", "Register the image to cyclades: %s" % upload)]
 297
 298         (code, choice) = d.menu(
 299             text="Choose one of the following or press <Back> to go back.",
 300             width=WIDTH, choices=choices, cancel="Back", height=13,
 301             menu_height=5, default_item=default_item,
 302             title="Image Registration Menu")
 303
 304         if code in (d.DIALOG_CANCEL, d.DIALOG_ESC):
 305             return False
 306
 307         if choice == "Account":
 308             default_item = "Account"
 309             (code, answer) = d.inputbox(
 310                 "Please provide your ~okeanos authentication token:",
 311                 init=session["account"]['auth_token'] if "account" in session
 312                 else '', width=WIDTH)
 313             if code in (d.DIALOG_CANCEL, d.DIALOG_ESC):
 314                 continue
 315             if len(answer) == 0 and "account" in session:
 316                     del session["account"]
 317             else:
 318                 token = answer.strip()
 319                 session['account'] = Kamaki.get_account(token)
 320                 if session['account'] is not None:
 321                     Kamaki.save_token(token)
 322                     default_item = "Upload"
 323                 else:
 324                     del session['account']
 325                     d.msgbox("The token you provided is not valid!",
 326                              width=SMALL_WIDTH)
 327         elif choice == "Upload":
 328             if upload_image(session):
 329                 default_item = "Register"
 330             else:
 331                 default_item = "Upload"
 332         elif choice == "Register":
 333             if register_image(session):
 334                 return True
 335             else:
 336                 default_item = "Register"
 337
 338
 339 def add_property(session):
 340     """Add a new property to the image"""
 341     d = session['dialog']
 342
 343     while 1:
 344         (code, answer) = d.inputbox("Please provide a name for a new image"
 345                                     " property:", width=WIDTH)
 346         if code in (d.DIALOG_CANCEL, d.DIALOG_ESC):
 347             return False
 348
 349         name = answer.strip()
 350         if len(name) == 0:
 351             d.msgbox("A property name cannot be empty", width=SMALL_WIDTH)
 352             continue
 353
 354         break
 355
 356     while 1:
 357         (code, answer) = d.inputbox("Please provide a value for image "
 358                                     "property %s" % name, width=WIDTH)
 359         if code in (d.DIALOG_CANCEL, d.DIALOG_ESC):
 360             return False
 361
 362         value = answer.strip()
 363         if len(value) == 0:
 364             d.msgbox("Value cannot be empty", width=SMALL_WIDTH)
 365             continue
 366
 367         break
 368
 369     session['metadata'][name] = value
 370
 371     return True
 372
 373
 374 def modify_properties(session):
 375     """Modify an existing image property"""
 376     d = session['dialog']
 377
 378     while 1:
 379         choices = []
 380         for (key, val) in session['metadata'].items():
 381             choices.append((str(key), str(val)))
 382
 383         (code, choice) = d.menu(
 384             "In this menu you can edit existing image properties or add new "
 385             "ones. Be careful! Most properties have special meaning and "
 386             "alter the image deployment behaviour. Press <HELP> to see more "
 387             "information about image properties. Press <BACK> when done.",
 388             height=18, width=WIDTH, choices=choices, menu_height=10,
 389             ok_label="Edit", extra_button=1, extra_label="Add", cancel="Back",
 390             help_button=1, title="Image Properties")
 391
 392         if code in (d.DIALOG_CANCEL, d.DIALOG_ESC):
 393             return True
 394         # Edit button
 395         elif code == d.DIALOG_OK:
 396             (code, answer) = d.inputbox("Please provide a new value for the "
 397                                         "image property with name `%s':" %
 398                                         choice,
 399                                         init=session['metadata'][choice],
 400                                         width=WIDTH)
 401             if code not in (d.DIALOG_CANCEL, d.DIALOG_ESC):
 402                 value = answer.strip()
 403                 if len(value) == 0:
 404                     d.msgbox("Value cannot be empty!")
 405                     continue
 406                 else:
 407                     session['metadata'][choice] = value
 408         # ADD button
 409         elif code == d.DIALOG_EXTRA:
 410             add_property(session)
 411         elif code == 'help':
 412             help_file = get_help_file("image_properties")
 413             assert os.path.exists(help_file)
 414             d.textbox(help_file, title="Image Properties", width=70, height=40)
 415
 416
 417 def delete_properties(session):
 418     """Delete an image property"""
 419     d = session['dialog']
 420
 421     choices = []
 422     for (key, val) in session['metadata'].items():
 423         choices.append((key, "%s" % val, 0))
 424
 425     (code, to_delete) = d.checklist("Choose which properties to delete:",
 426                                     choices=choices, width=WIDTH)
 427
 428     # If the user exits with ESC or CANCEL, the returned tag list is empty.
 429     for i in to_delete:
 430         del session['metadata'][i]
 431
 432     cnt = len(to_delete)
 433     if cnt > 0:
 434         d.msgbox("%d image properties were deleted." % cnt, width=SMALL_WIDTH)
 435         return True
 436     else:
 437         return False
 438
 439
 440 def exclude_tasks(session):
 441     """Exclude specific tasks from running during image deployment"""
 442     d = session['dialog']
 443
 444     index = 0
 445     displayed_index = 1
 446     choices = []
 447     mapping = {}
 448     if 'excluded_tasks' not in session:
 449         session['excluded_tasks'] = []
 450
 451     if -1 in session['excluded_tasks']:
 452         if not d.yesno("Image deployment configuration is disabled. "
 453                        "Do you wish to enable it?", width=SMALL_WIDTH):
 454             session['excluded_tasks'].remove(-1)
 455         else:
 456             return False
 457
 458     for (msg, task, osfamily) in CONFIGURATION_TASKS:
 459         if session['metadata']['OSFAMILY'] in osfamily:
 460             checked = 1 if index in session['excluded_tasks'] else 0
 461             choices.append((str(displayed_index), msg, checked))
 462             mapping[displayed_index] = index
 463             displayed_index += 1
 464         index += 1
 465
 466     while 1:
 467         (code, tags) = d.checklist(
 468             text="Please choose which configuration tasks you would like to "
 469                  "prevent from running during image deployment. "
 470                  "Press <No Config> to supress any configuration. "
 471                  "Press <Help> for more help on the image deployment "
 472                  "configuration tasks.",
 473             choices=choices, height=19, list_height=8, width=WIDTH,
 474             help_button=1, extra_button=1, extra_label="No Config",
 475             title="Exclude Configuration Tasks")
 476
 477         if code in (d.DIALOG_CANCEL, d.DIALOG_ESC):
 478             return False
 479         elif code == d.DIALOG_HELP:
 480             help_file = get_help_file("configuration_tasks")
 481             assert os.path.exists(help_file)
 482             d.textbox(help_file, title="Configuration Tasks",
 483                       width=70, height=40)
 484         # No Config button
 485         elif code == d.DIALOG_EXTRA:
 486             session['excluded_tasks'] = [-1]
 487             session['task_metadata'] = ["EXCLUDE_ALL_TASKS"]
 488             break
 489         elif code == d.DIALOG_OK:
 490             session['excluded_tasks'] = []
 491             for tag in tags:
 492                 session['excluded_tasks'].append(mapping[int(tag)])
 493
 494             exclude_metadata = []
 495             for task in session['excluded_tasks']:
 496                 exclude_metadata.extend(CONFIGURATION_TASKS[task][1])
 497
 498             session['task_metadata'] = map(lambda x: "EXCLUDE_TASK_%s" % x,
 499                                            exclude_metadata)
 500             break
 501
 502     return True
 503
 504
 505 def sysprep(session):
 506     """Perform various system preperation tasks on the image"""
 507     d = session['dialog']
 508     image = session['image']
 509
 510     # Is the image already shrinked?
 511     if 'shrinked' in session and session['shrinked']:
 512         msg = "It seems you have shrinked the image. Running system " \
 513               "preparation tasks on a shrinked image is dangerous."
 514
 515         if d.yesno("%s\n\nDo you really want to continue?" % msg,
 516                    width=SMALL_WIDTH, defaultno=1):
 517             return
 518
 519     wrapper = textwrap.TextWrapper(width=WIDTH - 5)
 520
 521     help_title = "System Preperation Tasks"
 522     sysprep_help = "%s\n%s\n\n" % (help_title, '=' * len(help_title))
 523
 524     syspreps = image.os.list_syspreps()
 525
 526     if len(syspreps) == 0:
 527         d.msgbox("No system preparation task available to run!",
 528                  title="System Preperation", width=SMALL_WIDTH)
 529         return
 530
 531     while 1:
 532         choices = []
 533         index = 0
 534         for sysprep in syspreps:
 535             name, descr = image.os.sysprep_info(sysprep)
 536             display_name = name.replace('-', ' ').capitalize()
 537             sysprep_help += "%s\n" % display_name
 538             sysprep_help += "%s\n" % ('-' * len(display_name))
 539             sysprep_help += "%s\n\n" % wrapper.fill(" ".join(descr.split()))
 540             enabled = 1 if sysprep.enabled else 0
 541             choices.append((str(index + 1), display_name, enabled))
 542             index += 1
 543
 544         (code, tags) = d.checklist(
 545             "Please choose which system preparation tasks you would like to "
 546             "run on the image. Press <Help> to see details about the system "
 547             "preparation tasks.", title="Run system preparation tasks",
 548             choices=choices, width=70, ok_label="Run", help_button=1)
 549
 550         if code in (d.DIALOG_CANCEL, d.DIALOG_ESC):
 551             return False
 552         elif code == d.DIALOG_HELP:
 553             d.scrollbox(sysprep_help, width=WIDTH)
 554         elif code == d.DIALOG_OK:
 555             # Enable selected syspreps and disable the rest
 556             for i in range(len(syspreps)):
 557                 if str(i + 1) in tags:
 558                     image.os.enable_sysprep(syspreps[i])
 559                 else:
 560                     image.os.disable_sysprep(syspreps[i])
 561
 562             if len([s for s in image.os.list_syspreps() if s.enabled]) == 0:
 563                 d.msgbox("No system preperation task is selected!",
 564                          title="System Preperation", width=SMALL_WIDTH)
 565                 continue
 566
 567             infobox = InfoBoxOutput(d, "Image Configuration")
 568             try:
 569                 image.out.add(infobox)
 570                 try:
 571                     image.mount(readonly=False)
 572                     try:
 573                         err = "Unable to execute the system preparation " \
 574                             "tasks. Couldn't mount the media%s."
 575                         title = "System Preparation"
 576                         if not image.mounted:
 577                             d.msgbox(err % "", title=title, width=SMALL_WIDTH)
 578                             return
 579                         elif image.mounted_ro:
 580                             d.msgbox(err % " read-write", title=title,
 581                                      width=SMALL_WIDTH)
 582                             return
 583
 584                         # The checksum is invalid. We have mounted the image rw
 585                         if 'checksum' in session:
 586                             del session['checksum']
 587
 588                         # Monitor the metadata changes during syspreps
 589                         with MetadataMonitor(session, image.os.meta):
 590                             image.os.do_sysprep()
 591                             infobox.finalize()
 592
 593                     finally:
 594                         image.umount()
 595                 finally:
 596                     image.out.remove(infobox)
 597             finally:
 598                 infobox.cleanup()
 599             break
 600     return True
 601
 602
 603 def shrink(session):
 604     """Shrink the image"""
 605     d = session['dialog']
 606     image = session['image']
 607
 608     shrinked = 'shrinked' in session and session['shrinked']
 609
 610     if shrinked:
 611         d.msgbox("The image is already shrinked!", title="Image Shrinking",
 612                  width=SMALL_WIDTH)
 613         return True
 614
 615     msg = "This operation will shrink the last partition of the image to " \
 616           "reduce the total image size. If the last partition is a swap " \
 617           "partition, then this partition is removed and the partition " \
 618           "before that is shrinked. The removed swap partition will be " \
 619           "recreated during image deployment."
 620
 621     if not d.yesno("%s\n\nDo you want to continue?" % msg, width=WIDTH,
 622                    height=12, title="Image Shrinking"):
 623         with MetadataMonitor(session, image.meta):
 624             infobox = InfoBoxOutput(d, "Image Shrinking", height=4)
 625             image.out.add(infobox)
 626             try:
 627                 image.shrink()
 628                 infobox.finalize()
 629             finally:
 630                 image.out.remove(infobox)
 631
 632         session['shrinked'] = True
 633         update_background_title(session)
 634     else:
 635         return False
 636
 637     return True
 638
 639
 640 def customization_menu(session):
 641     """Show image customization menu"""
 642     d = session['dialog']
 643
 644     choices = [("Sysprep", "Run various image preparation tasks"),
 645                ("Shrink", "Shrink image"),
 646                ("View/Modify", "View/Modify image properties"),
 647                ("Delete", "Delete image properties"),
 648                ("Exclude", "Exclude various deployment tasks from running")]
 649
 650     default_item = 0
 651
 652     actions = {"Sysprep": sysprep,
 653                "Shrink": shrink,
 654                "View/Modify": modify_properties,
 655                "Delete": delete_properties,
 656                "Exclude": exclude_tasks}
 657     while 1:
 658         (code, choice) = d.menu(
 659             text="Choose one of the following or press <Back> to exit.",
 660             width=WIDTH, choices=choices, cancel="Back", height=13,
 661             menu_height=len(choices), default_item=choices[default_item][0],
 662             title="Image Customization Menu")
 663
 664         if code in (d.DIALOG_CANCEL, d.DIALOG_ESC):
 665             break
 666         elif choice in actions:
 667             default_item = [entry[0] for entry in choices].index(choice)
 668             if actions[choice](session):
 669                 default_item = (default_item + 1) % len(choices)
 670
 671
 672 def main_menu(session):
 673     """Show the main menu of the program"""
 674     d = session['dialog']
 675
 676     update_background_title(session)
 677
 678     choices = [("Customize", "Customize image & ~okeanos deployment options"),
 679                ("Register", "Register image to ~okeanos"),
 680                ("Extract", "Dump image to local file system"),
 681                ("Reset", "Reset everything and start over again"),
 682                ("Help", "Get help for using snf-image-creator")]
 683
 684     default_item = "Customize"
 685
 686     actions = {"Customize": customization_menu, "Register": kamaki_menu,
 687                "Extract": extract_image}
 688     while 1:
 689         (code, choice) = d.menu(
 690             text="Choose one of the following or press <Exit> to exit.",
 691             width=WIDTH, choices=choices, cancel="Exit", height=13,
 692             default_item=default_item, menu_height=len(choices),
 693             title="Image Creator for ~okeanos (snf-image-creator version %s)" %
 694                   version)
 695
 696         if code in (d.DIALOG_CANCEL, d.DIALOG_ESC):
 697             if confirm_exit(d):
 698                 break
 699         elif choice == "Reset":
 700             if confirm_reset(d):
 701                 d.infobox("Resetting snf-image-creator. Please wait...",
 702                           width=SMALL_WIDTH)
 703                 raise Reset
 704         elif choice == "Help":
 705             d.msgbox("For help, check the online documentation:\n\nhttp://www"
 706                      ".synnefo.org/docs/snf-image-creator/latest/",
 707                      width=WIDTH, title="Help")
 708         elif choice in actions:
 709             actions[choice](session)
 710
 711 # vim: set sta sts=4 shiftwidth=4 sw=4 et ai :