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