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 import json
  44
  45 from image_creator import __version__ as version
  46 from image_creator.util import MD5, FatalError
  47 from image_creator.output.dialog import GaugeOutput, InfoBoxOutput
  48 from image_creator.kamaki_wrapper import Kamaki, ClientError
  49 from image_creator.help import get_help_file
  50 from image_creator.dialog_util import SMALL_WIDTH, WIDTH, \
  51     update_background_title, confirm_reset, confirm_exit, Reset, \
  52     extract_image, extract_metadata_string, add_cloud, edit_cloud
  53
  54 CONFIGURATION_TASKS = [
  55     ("Partition table manipulation", ["FixPartitionTable"],
  56         ["linux", "windows"]),
  57     ("File system resize",
  58         ["FilesystemResizeUnmounted", "FilesystemResizeMounted"],
  59         ["linux", "windows"]),
  60     ("Swap partition configuration", ["AddSwap"], ["linux"]),
  61     ("SSH keys removal", ["DeleteSSHKeys"], ["linux"]),
  62     ("Temporal RDP disabling", ["DisableRemoteDesktopConnections"],
  63         ["windows"]),
  64     ("SELinux relabeling at next boot", ["SELinuxAutorelabel"], ["linux"]),
  65     ("Hostname/Computer Name assignment", ["AssignHostname"],
  66         ["windows", "linux"]),
  67     ("Password change", ["ChangePassword"], ["windows", "linux"]),
  68     ("File injection", ["EnforcePersonality"], ["windows", "linux"])
  69 ]
  70
  71
  72 class MetadataMonitor(object):
  73     """Monitors image metadata chages"""
  74     def __init__(self, session, meta):
  75         self.session = session
  76         self.meta = meta
  77
  78     def __enter__(self):
  79         self.old = {}
  80         for (k, v) in self.meta.items():
  81             self.old[k] = v
  82
  83     def __exit__(self, type, value, traceback):
  84         d = self.session['dialog']
  85
  86         altered = {}
  87         added = {}
  88
  89         for (k, v) in self.meta.items():
  90             if k not in self.old:
  91                 added[k] = v
  92             elif self.old[k] != v:
  93                 altered[k] = v
  94
  95         if not (len(added) or len(altered)):
  96             return
  97
  98         msg = "The last action has changed some image properties:\n\n"
  99         if len(added):
 100             msg += "New image properties:\n"
 101             for (k, v) in added.items():
 102                 msg += '    %s: "%s"\n' % (k, v)
 103             msg += "\n"
 104         if len(altered):
 105             msg += "Updated image properties:\n"
 106             for (k, v) in altered.items():
 107                 msg += '    %s: "%s" -> "%s"\n' % (k, self.old[k], v)
 108             msg += "\n"
 109
 110         self.session['metadata'].update(added)
 111         self.session['metadata'].update(altered)
 112         d.msgbox(msg, title="Image Property Changes", width=SMALL_WIDTH)
 113
 114
 115 def upload_image(session):
 116     """Upload the image to the storage service"""
 117     d = session["dialog"]
 118     image = session['image']
 119     meta = session['metadata']
 120     size = image.size
 121
 122     if "account" not in session:
 123         d.msgbox("You need to select a valid cloud before you can upload "
 124                  "images to it", width=SMALL_WIDTH)
 125         return False
 126
 127     while 1:
 128         if 'upload' in session:
 129             init = session['upload']
 130         elif 'OS' in meta:
 131             init = "%s.diskdump" % meta['OS']
 132         else:
 133             init = ""
 134         (code, answer) = d.inputbox("Please provide a filename:", init=init,
 135                                     width=WIDTH)
 136
 137         if code in (d.DIALOG_CANCEL, d.DIALOG_ESC):
 138             return False
 139
 140         filename = answer.strip()
 141         if len(filename) == 0:
 142             d.msgbox("Filename cannot be empty", width=SMALL_WIDTH)
 143             continue
 144
 145         kamaki = Kamaki(session['account'], None)
 146         overwrite = []
 147         for f in (filename, "%s.md5sum" % filename, "%s.meta" % filename):
 148             if kamaki.object_exists(f):
 149                 overwrite.append(f)
 150
 151         if len(overwrite) > 0:
 152             if d.yesno("The following storage service object(s) already "
 153                        "exist(s):\n%s\nDo you want to overwrite them?" %
 154                        "\n".join(overwrite), width=WIDTH, defaultno=1):
 155                 continue
 156
 157         session['upload'] = filename
 158         break
 159
 160     gauge = GaugeOutput(d, "Image Upload", "Uploading...")
 161     try:
 162         out = image.out
 163         out.add(gauge)
 164         kamaki.out = out
 165         try:
 166             if 'checksum' not in session:
 167                 md5 = MD5(out)
 168                 session['checksum'] = md5.compute(image.device, size)
 169
 170             try:
 171                 # Upload image file
 172                 with open(image.device, 'rb') as f:
 173                     session["pithos_uri"] = \
 174                         kamaki.upload(f, size, filename,
 175                                       "Calculating block hashes",
 176                                       "Uploading missing blocks")
 177                 # Upload md5sum file
 178                 out.output("Uploading md5sum file...")
 179                 md5str = "%s %s\n" % (session['checksum'], filename)
 180                 kamaki.upload(StringIO.StringIO(md5str), size=len(md5str),
 181                               remote_path="%s.md5sum" % filename)
 182                 out.success("done")
 183
 184             except ClientError as e:
 185                 d.msgbox(
 186                     "Error in storage service client: %s" % e.message,
 187                     title="Storage Service Client Error", width=SMALL_WIDTH)
 188                 if 'pithos_uri' in session:
 189                     del session['pithos_uri']
 190                 return False
 191         finally:
 192             out.remove(gauge)
 193     finally:
 194         gauge.cleanup()
 195
 196     d.msgbox("Image file `%s' was successfully uploaded" % filename,
 197              width=SMALL_WIDTH)
 198
 199     return True
 200
 201
 202 def register_image(session):
 203     """Register image with the compute service"""
 204     d = session["dialog"]
 205
 206     is_public = False
 207
 208     if "account" not in session:
 209         d.msgbox("You need to select a valid cloud before you "
 210                  "can register an images with it", width=SMALL_WIDTH)
 211         return False
 212
 213     if "pithos_uri" not in session:
 214         d.msgbox("You need to upload the image to the cloud before you can "
 215                  "register it", width=SMALL_WIDTH)
 216         return False
 217
 218     while 1:
 219         (code, answer) = d.inputbox("Please provide a registration name:",
 220                                     width=WIDTH)
 221         if code in (d.DIALOG_CANCEL, d.DIALOG_ESC):
 222             return False
 223
 224         name = answer.strip()
 225         if len(name) == 0:
 226             d.msgbox("Registration name cannot be empty", width=SMALL_WIDTH)
 227             continue
 228
 229         ret = d.yesno("Make the image public?\\nA public image is accessible "
 230                       "by every user of the service.", defaultno=1,
 231                       width=WIDTH)
 232         if ret not in (0, 1):
 233             continue
 234
 235         is_public = True if ret == 0 else False
 236
 237         break
 238
 239     metadata = {}
 240     metadata.update(session['metadata'])
 241     if 'task_metadata' in session:
 242         for key in session['task_metadata']:
 243             metadata[key] = 'yes'
 244
 245     img_type = "public" if is_public else "private"
 246     gauge = GaugeOutput(d, "Image Registration", "Registering image...")
 247     try:
 248         out = session['image'].out
 249         out.add(gauge)
 250         try:
 251             try:
 252                 out.output("Registering %s image with the cloud..." % img_type)
 253                 kamaki = Kamaki(session['account'], out)
 254                 result = kamaki.register(name, session['pithos_uri'], metadata,
 255                                          is_public)
 256                 out.success('done')
 257                 # Upload metadata file
 258                 out.output("Uploading metadata file...")
 259                 metastring = unicode(json.dumps(result, ensure_ascii=False))
 260                 kamaki.upload(StringIO.StringIO(metastring),
 261                               size=len(metastring),
 262                               remote_path="%s.meta" % session['upload'])
 263                 out.success("done")
 264                 if is_public:
 265                     out.output("Sharing metadata and md5sum files...")
 266                     kamaki.share("%s.meta" % session['upload'])
 267                     kamaki.share("%s.md5sum" % session['upload'])
 268                     out.success('done')
 269             except ClientError as e:
 270                 d.msgbox("Error in storage service client: %s" % e.message)
 271                 return False
 272         finally:
 273             out.remove(gauge)
 274     finally:
 275         gauge.cleanup()
 276
 277     d.msgbox("%s image `%s' was successfully registered with the cloud as `%s'"
 278              % (img_type.title(), session['upload'], name), width=SMALL_WIDTH)
 279     return True
 280
 281
 282 def modify_clouds(session):
 283     """Modify existing cloud accounts"""
 284     d = session['dialog']
 285
 286     while 1:
 287         clouds = Kamaki.get_clouds()
 288         if not len(clouds):
 289             if not add_cloud(session):
 290                 break
 291             continue
 292
 293         choices = []
 294         for (name, cloud) in clouds.items():
 295             descr = cloud['description'] if 'description' in cloud else ''
 296             choices.append((name, descr))
 297
 298         (code, choice) = d.menu(
 299             "In this menu you can edit existing cloud accounts or add new "
 300             " ones. Press <Edit> to edit an existing account or <Add> to add "
 301             " a new one. Press <Back> or hit <ESC> when done.", height=18,
 302             width=WIDTH, choices=choices, menu_height=10, ok_label="Edit",
 303             extra_button=1, extra_label="Add", cancel="Back", help_button=1,
 304             title="Clouds")
 305
 306         if code in (d.DIALOG_CANCEL, d.DIALOG_ESC):
 307             return True
 308         elif code == d.DIALOG_OK:  # Edit button
 309             edit_cloud(session, choice)
 310         elif code == d.DIALOG_EXTRA:  # Add button
 311             add_cloud(session)
 312
 313
 314 def delete_clouds(session):
 315     """Delete existing cloud accounts"""
 316     d = session['dialog']
 317
 318     choices = []
 319     for (name, cloud) in Kamaki.get_clouds().items():
 320         descr = cloud['description'] if 'description' in cloud else ''
 321         choices.append((name, descr, 0))
 322
 323     if len(choices) == 0:
 324         d.msgbox("No available clouds to delete!", width=SMALL_WIDTH)
 325         return True
 326
 327     (code, to_delete) = d.checklist("Choose which cloud accounts to delete:",
 328                                     choices=choices, width=WIDTH)
 329
 330     if code in (d.DIALOG_CANCEL, d.DIALOG_ESC):
 331         return False
 332
 333     if not len(to_delete):
 334         d.msgbox("Nothing selected!", width=SMALL_WIDTH)
 335         return False
 336
 337     if not d.yesno("Are you sure you want to remove the selected cloud "
 338                    "accounts?", width=WIDTH, defaultno=1):
 339         for i in to_delete:
 340             Kamaki.remove_cloud(i)
 341             if 'cloud' in session and session['cloud'] == i:
 342                 del session['cloud']
 343                 if 'account' in session:
 344                     del session['account']
 345     else:
 346         return False
 347
 348     d.msgbox("%d cloud accounts were deleted." % len(to_delete),
 349              width=SMALL_WIDTH)
 350     return True
 351
 352
 353 def kamaki_menu(session):
 354     """Show kamaki related actions"""
 355     d = session['dialog']
 356     default_item = "Cloud"
 357
 358     if 'cloud' not in session:
 359         cloud = Kamaki.get_default_cloud_name()
 360         if cloud:
 361             session['cloud'] = cloud
 362             session['account'] = Kamaki.get_account(cloud)
 363             if not session['account']:
 364                 del session['account']
 365         else:
 366             default_item = "Add/Edit"
 367
 368     while 1:
 369         cloud = session["cloud"] if "cloud" in session else "<none>"
 370         if 'account' not in session and 'cloud' in session:
 371             cloud += " <invalid>"
 372
 373         upload = session["upload"] if "upload" in session else "<none>"
 374
 375         choices = [("Add/Edit", "Add/Edit cloud accounts"),
 376                    ("Delete", "Delete existing cloud accounts"),
 377                    ("Cloud", "Select cloud account to use: %s" % cloud),
 378                    ("Upload", "Upload image to the cloud"),
 379                    ("Register", "Register image with the cloud: %s" % upload)]
 380
 381         (code, choice) = d.menu(
 382             text="Choose one of the following or press <Back> to go back.",
 383             width=WIDTH, choices=choices, cancel="Back", height=13,
 384             menu_height=5, default_item=default_item,
 385             title="Image Registration Menu")
 386
 387         if code in (d.DIALOG_CANCEL, d.DIALOG_ESC):
 388             return False
 389
 390         if choice == "Add/Edit":
 391             if modify_clouds(session):
 392                 default_item = "Cloud"
 393         elif choice == "Delete":
 394             if delete_clouds(session):
 395                 if len(Kamaki.get_clouds()):
 396                     default_item = "Cloud"
 397                 else:
 398                     default_time = "Add/Edit"
 399             else:
 400                 default_time = "Delete"
 401         elif choice == "Cloud":
 402             default_item = "Cloud"
 403             clouds = Kamaki.get_clouds()
 404             if not len(clouds):
 405                 d.msgbox("No clouds available. Please add a new cloud!",
 406                          width=SMALL_WIDTH)
 407                 default_item = "Add/Edit"
 408                 continue
 409
 410             if 'cloud' not in session:
 411                 session['cloud'] = clouds.keys()[0]
 412
 413             choices = []
 414             for name, info in clouds.items():
 415                 default = 1 if session['cloud'] == name else 0
 416                 descr = info['description'] if 'description' in info else ""
 417                 choices.append((name, descr, default))
 418
 419             (code, answer) = d.radiolist("Please select a cloud:",
 420                                          width=WIDTH, choices=choices)
 421             if code in (d.DIALOG_CANCEL, d.DIALOG_ESC):
 422                 continue
 423             else:
 424                 session['account'] = Kamaki.get_account(answer)
 425
 426                 if session['account'] is None:  # invalid account
 427                     if not d.yesno("The cloud %s' is not valid! Would you "
 428                                    "like to edit it?" % answer, width=WIDTH):
 429                         if edit_cloud(session, answer):
 430                             session['account'] = Kamaki.get_account(answer)
 431                             Kamaki.set_default_cloud(answer)
 432
 433                 if session['account'] is not None:
 434                     session['cloud'] = answer
 435                     Kamaki.set_default_cloud(answer)
 436                     default_item = "Upload"
 437                 else:
 438                     del session['account']
 439                     del session['cloud']
 440         elif choice == "Upload":
 441             if upload_image(session):
 442                 default_item = "Register"
 443             else:
 444                 default_item = "Upload"
 445         elif choice == "Register":
 446             if register_image(session):
 447                 return True
 448             else:
 449                 default_item = "Register"
 450
 451
 452 def add_property(session):
 453     """Add a new property to the image"""
 454     d = session['dialog']
 455
 456     while 1:
 457         (code, answer) = d.inputbox("Please provide a name for a new image"
 458                                     " property:", width=WIDTH)
 459         if code in (d.DIALOG_CANCEL, d.DIALOG_ESC):
 460             return False
 461
 462         name = answer.strip()
 463         if len(name) == 0:
 464             d.msgbox("A property name cannot be empty", width=SMALL_WIDTH)
 465             continue
 466
 467         break
 468
 469     while 1:
 470         (code, answer) = d.inputbox("Please provide a value for image "
 471                                     "property %s" % name, width=WIDTH)
 472         if code in (d.DIALOG_CANCEL, d.DIALOG_ESC):
 473             return False
 474
 475         value = answer.strip()
 476         if len(value) == 0:
 477             d.msgbox("Value cannot be empty", width=SMALL_WIDTH)
 478             continue
 479
 480         break
 481
 482     session['metadata'][name] = value
 483
 484     return True
 485
 486
 487 def modify_properties(session):
 488     """Modify an existing image property"""
 489     d = session['dialog']
 490
 491     while 1:
 492         choices = []
 493         for (key, val) in session['metadata'].items():
 494             choices.append((str(key), str(val)))
 495
 496         (code, choice) = d.menu(
 497             "In this menu you can edit existing image properties or add new "
 498             "ones. Be careful! Most properties have special meaning and "
 499             "alter the image deployment behaviour. Press <HELP> to see more "
 500             "information about image properties. Press <BACK> when done.",
 501             height=18, width=WIDTH, choices=choices, menu_height=10,
 502             ok_label="Edit", extra_button=1, extra_label="Add", cancel="Back",
 503             help_button=1, title="Image Properties")
 504
 505         if code in (d.DIALOG_CANCEL, d.DIALOG_ESC):
 506             return True
 507         # Edit button
 508         elif code == d.DIALOG_OK:
 509             (code, answer) = d.inputbox("Please provide a new value for the "
 510                                         "image property with name `%s':" %
 511                                         choice,
 512                                         init=session['metadata'][choice],
 513                                         width=WIDTH)
 514             if code not in (d.DIALOG_CANCEL, d.DIALOG_ESC):
 515                 value = answer.strip()
 516                 if len(value) == 0:
 517                     d.msgbox("Value cannot be empty!")
 518                     continue
 519                 else:
 520                     session['metadata'][choice] = value
 521         # ADD button
 522         elif code == d.DIALOG_EXTRA:
 523             add_property(session)
 524         elif code == 'help':
 525             help_file = get_help_file("image_properties")
 526             assert os.path.exists(help_file)
 527             d.textbox(help_file, title="Image Properties", width=70, height=40)
 528
 529
 530 def delete_properties(session):
 531     """Delete an image property"""
 532     d = session['dialog']
 533
 534     choices = []
 535     for (key, val) in session['metadata'].items():
 536         choices.append((key, "%s" % val, 0))
 537
 538     (code, to_delete) = d.checklist("Choose which properties to delete:",
 539                                     choices=choices, width=WIDTH)
 540
 541     # If the user exits with ESC or CANCEL, the returned tag list is empty.
 542     for i in to_delete:
 543         del session['metadata'][i]
 544
 545     cnt = len(to_delete)
 546     if cnt > 0:
 547         d.msgbox("%d image properties were deleted." % cnt, width=SMALL_WIDTH)
 548         return True
 549     else:
 550         return False
 551
 552
 553 def exclude_tasks(session):
 554     """Exclude specific tasks from running during image deployment"""
 555     d = session['dialog']
 556
 557     index = 0
 558     displayed_index = 1
 559     choices = []
 560     mapping = {}
 561     if 'excluded_tasks' not in session:
 562         session['excluded_tasks'] = []
 563
 564     if -1 in session['excluded_tasks']:
 565         if not d.yesno("Image deployment configuration is disabled. "
 566                        "Do you wish to enable it?", width=SMALL_WIDTH):
 567             session['excluded_tasks'].remove(-1)
 568         else:
 569             return False
 570
 571     for (msg, task, osfamily) in CONFIGURATION_TASKS:
 572         if session['metadata']['OSFAMILY'] in osfamily:
 573             checked = 1 if index in session['excluded_tasks'] else 0
 574             choices.append((str(displayed_index), msg, checked))
 575             mapping[displayed_index] = index
 576             displayed_index += 1
 577         index += 1
 578
 579     while 1:
 580         (code, tags) = d.checklist(
 581             text="Please choose which configuration tasks you would like to "
 582                  "prevent from running during image deployment. "
 583                  "Press <No Config> to supress any configuration. "
 584                  "Press <Help> for more help on the image deployment "
 585                  "configuration tasks.",
 586             choices=choices, height=19, list_height=8, width=WIDTH,
 587             help_button=1, extra_button=1, extra_label="No Config",
 588             title="Exclude Configuration Tasks")
 589
 590         if code in (d.DIALOG_CANCEL, d.DIALOG_ESC):
 591             return False
 592         elif code == d.DIALOG_HELP:
 593             help_file = get_help_file("configuration_tasks")
 594             assert os.path.exists(help_file)
 595             d.textbox(help_file, title="Configuration Tasks",
 596                       width=70, height=40)
 597         # No Config button
 598         elif code == d.DIALOG_EXTRA:
 599             session['excluded_tasks'] = [-1]
 600             session['task_metadata'] = ["EXCLUDE_ALL_TASKS"]
 601             break
 602         elif code == d.DIALOG_OK:
 603             session['excluded_tasks'] = []
 604             for tag in tags:
 605                 session['excluded_tasks'].append(mapping[int(tag)])
 606
 607             exclude_metadata = []
 608             for task in session['excluded_tasks']:
 609                 exclude_metadata.extend(CONFIGURATION_TASKS[task][1])
 610
 611             session['task_metadata'] = map(lambda x: "EXCLUDE_TASK_%s" % x,
 612                                            exclude_metadata)
 613             break
 614
 615     return True
 616
 617
 618 def sysprep(session):
 619     """Perform various system preperation tasks on the image"""
 620     d = session['dialog']
 621     image = session['image']
 622
 623     # Is the image already shrinked?
 624     if 'shrinked' in session and session['shrinked']:
 625         msg = "It seems you have shrinked the image. Running system " \
 626               "preparation tasks on a shrinked image is dangerous."
 627
 628         if d.yesno("%s\n\nDo you really want to continue?" % msg,
 629                    width=SMALL_WIDTH, defaultno=1):
 630             return
 631
 632     wrapper = textwrap.TextWrapper(width=WIDTH - 5)
 633
 634     help_title = "System Preperation Tasks"
 635     sysprep_help = "%s\n%s\n\n" % (help_title, '=' * len(help_title))
 636
 637     syspreps = image.os.list_syspreps()
 638
 639     if len(syspreps) == 0:
 640         d.msgbox("No system preparation task available to run!",
 641                  title="System Preperation", width=SMALL_WIDTH)
 642         return
 643
 644     while 1:
 645         choices = []
 646         index = 0
 647         for sysprep in syspreps:
 648             name, descr = image.os.sysprep_info(sysprep)
 649             display_name = name.replace('-', ' ').capitalize()
 650             sysprep_help += "%s\n" % display_name
 651             sysprep_help += "%s\n" % ('-' * len(display_name))
 652             sysprep_help += "%s\n\n" % wrapper.fill(" ".join(descr.split()))
 653             enabled = 1 if sysprep.enabled else 0
 654             choices.append((str(index + 1), display_name, enabled))
 655             index += 1
 656
 657         (code, tags) = d.checklist(
 658             "Please choose which system preparation tasks you would like to "
 659             "run on the image. Press <Help> to see details about the system "
 660             "preparation tasks.", title="Run system preparation tasks",
 661             choices=choices, width=70, ok_label="Run", help_button=1)
 662
 663         if code in (d.DIALOG_CANCEL, d.DIALOG_ESC):
 664             return False
 665         elif code == d.DIALOG_HELP:
 666             d.scrollbox(sysprep_help, width=WIDTH)
 667         elif code == d.DIALOG_OK:
 668             # Enable selected syspreps and disable the rest
 669             for i in range(len(syspreps)):
 670                 if str(i + 1) in tags:
 671                     image.os.enable_sysprep(syspreps[i])
 672                 else:
 673                     image.os.disable_sysprep(syspreps[i])
 674
 675             if len([s for s in image.os.list_syspreps() if s.enabled]) == 0:
 676                 d.msgbox("No system preperation task is selected!",
 677                          title="System Preperation", width=SMALL_WIDTH)
 678                 continue
 679
 680             infobox = InfoBoxOutput(d, "Image Configuration")
 681             try:
 682                 image.out.add(infobox)
 683                 try:
 684                     # The checksum is invalid. We have mounted the image rw
 685                     if 'checksum' in session:
 686                         del session['checksum']
 687
 688                     # Monitor the metadata changes during syspreps
 689                     with MetadataMonitor(session, image.os.meta):
 690                         try:
 691                             image.os.do_sysprep()
 692                             infobox.finalize()
 693                         except FatalError as e:
 694                             title = "System Preparation"
 695                             d.msgbox("System Preparation failed: %s" % e,
 696                                      title=title, width=SMALL_WIDTH)
 697                 finally:
 698                     image.out.remove(infobox)
 699             finally:
 700                 infobox.cleanup()
 701             break
 702     return True
 703
 704
 705 def shrink(session):
 706     """Shrink the image"""
 707     d = session['dialog']
 708     image = session['image']
 709
 710     shrinked = 'shrinked' in session and session['shrinked']
 711
 712     if shrinked:
 713         d.msgbox("The image is already shrinked!", title="Image Shrinking",
 714                  width=SMALL_WIDTH)
 715         return True
 716
 717     msg = "This operation will shrink the last partition of the image to " \
 718           "reduce the total image size. If the last partition is a swap " \
 719           "partition, then this partition is removed and the partition " \
 720           "before that is shrinked. The removed swap partition will be " \
 721           "recreated during image deployment."
 722
 723     if not d.yesno("%s\n\nDo you want to continue?" % msg, width=WIDTH,
 724                    height=12, title="Image Shrinking"):
 725         with MetadataMonitor(session, image.meta):
 726             infobox = InfoBoxOutput(d, "Image Shrinking", height=4)
 727             image.out.add(infobox)
 728             try:
 729                 image.shrink()
 730                 infobox.finalize()
 731             finally:
 732                 image.out.remove(infobox)
 733
 734         session['shrinked'] = True
 735         update_background_title(session)
 736     else:
 737         return False
 738
 739     return True
 740
 741
 742 def customization_menu(session):
 743     """Show image customization menu"""
 744     d = session['dialog']
 745
 746     choices = [("Sysprep", "Run various image preparation tasks"),
 747                ("Shrink", "Shrink image"),
 748                ("View/Modify", "View/Modify image properties"),
 749                ("Delete", "Delete image properties"),
 750                ("Exclude", "Exclude various deployment tasks from running")]
 751
 752     default_item = 0
 753
 754     actions = {"Sysprep": sysprep,
 755                "Shrink": shrink,
 756                "View/Modify": modify_properties,
 757                "Delete": delete_properties,
 758                "Exclude": exclude_tasks}
 759     while 1:
 760         (code, choice) = d.menu(
 761             text="Choose one of the following or press <Back> to exit.",
 762             width=WIDTH, choices=choices, cancel="Back", height=13,
 763             menu_height=len(choices), default_item=choices[default_item][0],
 764             title="Image Customization Menu")
 765
 766         if code in (d.DIALOG_CANCEL, d.DIALOG_ESC):
 767             break
 768         elif choice in actions:
 769             default_item = [entry[0] for entry in choices].index(choice)
 770             if actions[choice](session):
 771                 default_item = (default_item + 1) % len(choices)
 772
 773
 774 def main_menu(session):
 775     """Show the main menu of the program"""
 776     d = session['dialog']
 777
 778     update_background_title(session)
 779
 780     choices = [("Customize", "Customize image & cloud deployment options"),
 781                ("Register", "Register image to a cloud"),
 782                ("Extract", "Dump image to local file system"),
 783                ("Reset", "Reset everything and start over again"),
 784                ("Help", "Get help for using snf-image-creator")]
 785
 786     default_item = "Customize"
 787
 788     actions = {"Customize": customization_menu, "Register": kamaki_menu,
 789                "Extract": extract_image}
 790     while 1:
 791         (code, choice) = d.menu(
 792             text="Choose one of the following or press <Exit> to exit.",
 793             width=WIDTH, choices=choices, cancel="Exit", height=13,
 794             default_item=default_item, menu_height=len(choices),
 795             title="Image Creator for synnefo (snf-image-creator version %s)" %
 796                   version)
 797
 798         if code in (d.DIALOG_CANCEL, d.DIALOG_ESC):
 799             if confirm_exit(d):
 800                 break
 801         elif choice == "Reset":
 802             if confirm_reset(d):
 803                 d.infobox("Resetting snf-image-creator. Please wait...",
 804                           width=SMALL_WIDTH)
 805                 raise Reset
 806         elif choice == "Help":
 807             d.msgbox("For help, check the online documentation:\n\nhttp://www"
 808                      ".synnefo.org/docs/snf-image-creator/latest/",
 809                      width=WIDTH, title="Help")
 810         elif choice in actions:
 811             actions[choice](session)
 812
 813 # vim: set sta sts=4 shiftwidth=4 sw=4 et ai :