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, add_cloud, edit_cloud
  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 select a valid cloud before you can upload "
 123                  "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 select a valid cloud 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 modify_clouds(session):
 281     """Modify existing cloud accounts"""
 282     d = session['dialog']
 283
 284     while 1:
 285         clouds = Kamaki.get_clouds()
 286         if not len(clouds):
 287             if not add_cloud(session):
 288                 break
 289             continue
 290
 291         choices = []
 292         for (name, cloud) in clouds.items():
 293             descr = cloud['description'] if 'description' in cloud else ''
 294             choices.append((name, descr))
 295
 296         (code, choice) = d.menu(
 297             "In this menu you can edit existing cloud accounts or add new "
 298             " ones. Press <Edit> to edit an existing account or <Add> to add "
 299             " a new one. Press <Back> or hit <ESC> when done.", height=18,
 300             width=WIDTH, choices=choices, menu_height=10, ok_label="Edit",
 301             extra_button=1, extra_label="Add", cancel="Back", help_button=1,
 302             title="Clouds")
 303
 304         if code in (d.DIALOG_CANCEL, d.DIALOG_ESC):
 305             return True
 306         elif code == d.DIALOG_OK:  # Edit button
 307             edit_cloud(session, choice)
 308         elif code == d.DIALOG_EXTRA:  # Add button
 309             add_cloud(session)
 310
 311
 312 def delete_clouds(session):
 313     """Delete existing cloud accounts"""
 314     d = session['dialog']
 315
 316     choices = []
 317     for (name, cloud) in Kamaki.get_clouds().items():
 318         descr = cloud['description'] if 'description' in cloud else ''
 319         choices.append((name, descr, 0))
 320
 321     if len(choices) == 0:
 322         d.msgbox("No available clouds to delete!", width=SMALL_WIDTH)
 323         return True
 324
 325     (code, to_delete) = d.checklist("Choose which cloud accounts to delete:",
 326                                     choices=choices, width=WIDTH)
 327
 328     if code in (d.DIALOG_CANCEL, d.DIALOG_ESC):
 329         return False
 330
 331     if not len(to_delete):
 332         d.msgbox("Nothing selected!", width=SMALL_WIDTH)
 333         return False
 334
 335     if not d.yesno("Are you sure you want to remove the selected cloud "
 336                    "accounts?", width=WIDTH, defaultno=1):
 337         for i in to_delete:
 338             Kamaki.remove_cloud(i)
 339             if 'cloud' in session and session['cloud'] == i:
 340                 del session['cloud']
 341                 if 'account' in session:
 342                     del session['account']
 343     else:
 344         return False
 345
 346     d.msgbox("%d cloud accounts were deleted." % len(to_delete),
 347              width=SMALL_WIDTH)
 348     return True
 349
 350
 351 def kamaki_menu(session):
 352     """Show kamaki related actions"""
 353     d = session['dialog']
 354     default_item = "Cloud"
 355
 356     if 'cloud' not in session:
 357         cloud = Kamaki.get_default_cloud_name()
 358         if cloud:
 359             session['cloud'] = cloud
 360             session['account'] = Kamaki.get_account(cloud)
 361             if not session['account']:
 362                 del session['account']
 363         else:
 364             default_item = "Add/Edit"
 365
 366     while 1:
 367         cloud = session["cloud"] if "cloud" in session else "<none>"
 368         if 'account' not in session and 'cloud' in session:
 369             cloud += " <invalid>"
 370
 371         upload = session["upload"] if "upload" in session else "<none>"
 372
 373         choices = [("Add/Edit", "Add/Edit cloud accounts"),
 374                    ("Delete", "Delete existing cloud accounts"),
 375                    ("Cloud", "Select cloud account to use: %s" % cloud),
 376                    ("Upload", "Upload image to pithos+"),
 377                    ("Register", "Register the image to cyclades: %s" % upload)]
 378
 379         (code, choice) = d.menu(
 380             text="Choose one of the following or press <Back> to go back.",
 381             width=WIDTH, choices=choices, cancel="Back", height=13,
 382             menu_height=5, default_item=default_item,
 383             title="Image Registration Menu")
 384
 385         if code in (d.DIALOG_CANCEL, d.DIALOG_ESC):
 386             return False
 387
 388         if choice == "Add/Edit":
 389             if modify_clouds(session):
 390                 default_item = "Cloud"
 391         elif choice == "Delete":
 392             if delete_clouds(session):
 393                 if len(Kamaki.get_clouds()):
 394                     default_item = "Cloud"
 395                 else:
 396                     default_time = "Add/Edit"
 397             else:
 398                 default_time = "Delete"
 399         elif choice == "Cloud":
 400             default_item = "Cloud"
 401             clouds = Kamaki.get_clouds()
 402             if not len(clouds):
 403                 d.msgbox("No clouds available. Please add a new cloud!",
 404                          width=SMALL_WIDTH)
 405                 default_item = "Add/Edit"
 406                 continue
 407
 408             if 'cloud' not in session:
 409                 session['cloud'] = clouds.keys()[0]
 410
 411             choices = []
 412             for name, info in clouds.items():
 413                 default = 1 if session['cloud'] == name else 0
 414                 descr = info['description'] if 'description' in info else ""
 415                 choices.append((name, descr, default))
 416
 417             (code, answer) = d.radiolist("Please select a cloud:",
 418                                          width=WIDTH, choices=choices)
 419             if code in (d.DIALOG_CANCEL, d.DIALOG_ESC):
 420                 continue
 421             else:
 422                 session['account'] = Kamaki.get_account(answer)
 423
 424                 if session['account'] is None:  # invalid account
 425                     if not d.yesno("The cloud %s' is not valid! Would you "
 426                                    "like to edit it?" % answer, width=WIDTH):
 427                         if edit_cloud(session, answer):
 428                             session['account'] = Kamaki.get_account(answer)
 429                             Kamaki.set_default_cloud(answer)
 430
 431                 if session['account'] is not None:
 432                     session['cloud'] = answer
 433                     Kamaki.set_default_cloud(answer)
 434                     default_item = "Upload"
 435                 else:
 436                     del session['account']
 437                     del session['cloud']
 438         elif choice == "Upload":
 439             if upload_image(session):
 440                 default_item = "Register"
 441             else:
 442                 default_item = "Upload"
 443         elif choice == "Register":
 444             if register_image(session):
 445                 return True
 446             else:
 447                 default_item = "Register"
 448
 449
 450 def add_property(session):
 451     """Add a new property to the image"""
 452     d = session['dialog']
 453
 454     while 1:
 455         (code, answer) = d.inputbox("Please provide a name for a new image"
 456                                     " property:", width=WIDTH)
 457         if code in (d.DIALOG_CANCEL, d.DIALOG_ESC):
 458             return False
 459
 460         name = answer.strip()
 461         if len(name) == 0:
 462             d.msgbox("A property name cannot be empty", width=SMALL_WIDTH)
 463             continue
 464
 465         break
 466
 467     while 1:
 468         (code, answer) = d.inputbox("Please provide a value for image "
 469                                     "property %s" % name, width=WIDTH)
 470         if code in (d.DIALOG_CANCEL, d.DIALOG_ESC):
 471             return False
 472
 473         value = answer.strip()
 474         if len(value) == 0:
 475             d.msgbox("Value cannot be empty", width=SMALL_WIDTH)
 476             continue
 477
 478         break
 479
 480     session['metadata'][name] = value
 481
 482     return True
 483
 484
 485 def modify_properties(session):
 486     """Modify an existing image property"""
 487     d = session['dialog']
 488
 489     while 1:
 490         choices = []
 491         for (key, val) in session['metadata'].items():
 492             choices.append((str(key), str(val)))
 493
 494         (code, choice) = d.menu(
 495             "In this menu you can edit existing image properties or add new "
 496             "ones. Be careful! Most properties have special meaning and "
 497             "alter the image deployment behaviour. Press <HELP> to see more "
 498             "information about image properties. Press <BACK> when done.",
 499             height=18, width=WIDTH, choices=choices, menu_height=10,
 500             ok_label="Edit", extra_button=1, extra_label="Add", cancel="Back",
 501             help_button=1, title="Image Properties")
 502
 503         if code in (d.DIALOG_CANCEL, d.DIALOG_ESC):
 504             return True
 505         # Edit button
 506         elif code == d.DIALOG_OK:
 507             (code, answer) = d.inputbox("Please provide a new value for the "
 508                                         "image property with name `%s':" %
 509                                         choice,
 510                                         init=session['metadata'][choice],
 511                                         width=WIDTH)
 512             if code not in (d.DIALOG_CANCEL, d.DIALOG_ESC):
 513                 value = answer.strip()
 514                 if len(value) == 0:
 515                     d.msgbox("Value cannot be empty!")
 516                     continue
 517                 else:
 518                     session['metadata'][choice] = value
 519         # ADD button
 520         elif code == d.DIALOG_EXTRA:
 521             add_property(session)
 522         elif code == 'help':
 523             help_file = get_help_file("image_properties")
 524             assert os.path.exists(help_file)
 525             d.textbox(help_file, title="Image Properties", width=70, height=40)
 526
 527
 528 def delete_properties(session):
 529     """Delete an image property"""
 530     d = session['dialog']
 531
 532     choices = []
 533     for (key, val) in session['metadata'].items():
 534         choices.append((key, "%s" % val, 0))
 535
 536     (code, to_delete) = d.checklist("Choose which properties to delete:",
 537                                     choices=choices, width=WIDTH)
 538
 539     # If the user exits with ESC or CANCEL, the returned tag list is empty.
 540     for i in to_delete:
 541         del session['metadata'][i]
 542
 543     cnt = len(to_delete)
 544     if cnt > 0:
 545         d.msgbox("%d image properties were deleted." % cnt, width=SMALL_WIDTH)
 546         return True
 547     else:
 548         return False
 549
 550
 551 def exclude_tasks(session):
 552     """Exclude specific tasks from running during image deployment"""
 553     d = session['dialog']
 554
 555     index = 0
 556     displayed_index = 1
 557     choices = []
 558     mapping = {}
 559     if 'excluded_tasks' not in session:
 560         session['excluded_tasks'] = []
 561
 562     if -1 in session['excluded_tasks']:
 563         if not d.yesno("Image deployment configuration is disabled. "
 564                        "Do you wish to enable it?", width=SMALL_WIDTH):
 565             session['excluded_tasks'].remove(-1)
 566         else:
 567             return False
 568
 569     for (msg, task, osfamily) in CONFIGURATION_TASKS:
 570         if session['metadata']['OSFAMILY'] in osfamily:
 571             checked = 1 if index in session['excluded_tasks'] else 0
 572             choices.append((str(displayed_index), msg, checked))
 573             mapping[displayed_index] = index
 574             displayed_index += 1
 575         index += 1
 576
 577     while 1:
 578         (code, tags) = d.checklist(
 579             text="Please choose which configuration tasks you would like to "
 580                  "prevent from running during image deployment. "
 581                  "Press <No Config> to supress any configuration. "
 582                  "Press <Help> for more help on the image deployment "
 583                  "configuration tasks.",
 584             choices=choices, height=19, list_height=8, width=WIDTH,
 585             help_button=1, extra_button=1, extra_label="No Config",
 586             title="Exclude Configuration Tasks")
 587
 588         if code in (d.DIALOG_CANCEL, d.DIALOG_ESC):
 589             return False
 590         elif code == d.DIALOG_HELP:
 591             help_file = get_help_file("configuration_tasks")
 592             assert os.path.exists(help_file)
 593             d.textbox(help_file, title="Configuration Tasks",
 594                       width=70, height=40)
 595         # No Config button
 596         elif code == d.DIALOG_EXTRA:
 597             session['excluded_tasks'] = [-1]
 598             session['task_metadata'] = ["EXCLUDE_ALL_TASKS"]
 599             break
 600         elif code == d.DIALOG_OK:
 601             session['excluded_tasks'] = []
 602             for tag in tags:
 603                 session['excluded_tasks'].append(mapping[int(tag)])
 604
 605             exclude_metadata = []
 606             for task in session['excluded_tasks']:
 607                 exclude_metadata.extend(CONFIGURATION_TASKS[task][1])
 608
 609             session['task_metadata'] = map(lambda x: "EXCLUDE_TASK_%s" % x,
 610                                            exclude_metadata)
 611             break
 612
 613     return True
 614
 615
 616 def sysprep(session):
 617     """Perform various system preperation tasks on the image"""
 618     d = session['dialog']
 619     image = session['image']
 620
 621     # Is the image already shrinked?
 622     if 'shrinked' in session and session['shrinked']:
 623         msg = "It seems you have shrinked the image. Running system " \
 624               "preparation tasks on a shrinked image is dangerous."
 625
 626         if d.yesno("%s\n\nDo you really want to continue?" % msg,
 627                    width=SMALL_WIDTH, defaultno=1):
 628             return
 629
 630     wrapper = textwrap.TextWrapper(width=WIDTH - 5)
 631
 632     help_title = "System Preperation Tasks"
 633     sysprep_help = "%s\n%s\n\n" % (help_title, '=' * len(help_title))
 634
 635     syspreps = image.os.list_syspreps()
 636
 637     if len(syspreps) == 0:
 638         d.msgbox("No system preparation task available to run!",
 639                  title="System Preperation", width=SMALL_WIDTH)
 640         return
 641
 642     while 1:
 643         choices = []
 644         index = 0
 645         for sysprep in syspreps:
 646             name, descr = image.os.sysprep_info(sysprep)
 647             display_name = name.replace('-', ' ').capitalize()
 648             sysprep_help += "%s\n" % display_name
 649             sysprep_help += "%s\n" % ('-' * len(display_name))
 650             sysprep_help += "%s\n\n" % wrapper.fill(" ".join(descr.split()))
 651             enabled = 1 if sysprep.enabled else 0
 652             choices.append((str(index + 1), display_name, enabled))
 653             index += 1
 654
 655         (code, tags) = d.checklist(
 656             "Please choose which system preparation tasks you would like to "
 657             "run on the image. Press <Help> to see details about the system "
 658             "preparation tasks.", title="Run system preparation tasks",
 659             choices=choices, width=70, ok_label="Run", help_button=1)
 660
 661         if code in (d.DIALOG_CANCEL, d.DIALOG_ESC):
 662             return False
 663         elif code == d.DIALOG_HELP:
 664             d.scrollbox(sysprep_help, width=WIDTH)
 665         elif code == d.DIALOG_OK:
 666             # Enable selected syspreps and disable the rest
 667             for i in range(len(syspreps)):
 668                 if str(i + 1) in tags:
 669                     image.os.enable_sysprep(syspreps[i])
 670                 else:
 671                     image.os.disable_sysprep(syspreps[i])
 672
 673             if len([s for s in image.os.list_syspreps() if s.enabled]) == 0:
 674                 d.msgbox("No system preperation task is selected!",
 675                          title="System Preperation", width=SMALL_WIDTH)
 676                 continue
 677
 678             infobox = InfoBoxOutput(d, "Image Configuration")
 679             try:
 680                 image.out.add(infobox)
 681                 try:
 682                     # The checksum is invalid. We have mounted the image rw
 683                     if 'checksum' in session:
 684                         del session['checksum']
 685
 686                     # Monitor the metadata changes during syspreps
 687                     with MetadataMonitor(session, image.os.meta):
 688                         try:
 689                             image.os.do_sysprep()
 690                             infobox.finalize()
 691                         except FatalError as e:
 692                             title = "System Preparation"
 693                             d.msgbox("System Preparation failed: %s" % e,
 694                                      title=title, width=SMALL_WIDTH)
 695                 finally:
 696                     image.out.remove(infobox)
 697             finally:
 698                 infobox.cleanup()
 699             break
 700     return True
 701
 702
 703 def shrink(session):
 704     """Shrink the image"""
 705     d = session['dialog']
 706     image = session['image']
 707
 708     shrinked = 'shrinked' in session and session['shrinked']
 709
 710     if shrinked:
 711         d.msgbox("The image is already shrinked!", title="Image Shrinking",
 712                  width=SMALL_WIDTH)
 713         return True
 714
 715     msg = "This operation will shrink the last partition of the image to " \
 716           "reduce the total image size. If the last partition is a swap " \
 717           "partition, then this partition is removed and the partition " \
 718           "before that is shrinked. The removed swap partition will be " \
 719           "recreated during image deployment."
 720
 721     if not d.yesno("%s\n\nDo you want to continue?" % msg, width=WIDTH,
 722                    height=12, title="Image Shrinking"):
 723         with MetadataMonitor(session, image.meta):
 724             infobox = InfoBoxOutput(d, "Image Shrinking", height=4)
 725             image.out.add(infobox)
 726             try:
 727                 image.shrink()
 728                 infobox.finalize()
 729             finally:
 730                 image.out.remove(infobox)
 731
 732         session['shrinked'] = True
 733         update_background_title(session)
 734     else:
 735         return False
 736
 737     return True
 738
 739
 740 def customization_menu(session):
 741     """Show image customization menu"""
 742     d = session['dialog']
 743
 744     choices = [("Sysprep", "Run various image preparation tasks"),
 745                ("Shrink", "Shrink image"),
 746                ("View/Modify", "View/Modify image properties"),
 747                ("Delete", "Delete image properties"),
 748                ("Exclude", "Exclude various deployment tasks from running")]
 749
 750     default_item = 0
 751
 752     actions = {"Sysprep": sysprep,
 753                "Shrink": shrink,
 754                "View/Modify": modify_properties,
 755                "Delete": delete_properties,
 756                "Exclude": exclude_tasks}
 757     while 1:
 758         (code, choice) = d.menu(
 759             text="Choose one of the following or press <Back> to exit.",
 760             width=WIDTH, choices=choices, cancel="Back", height=13,
 761             menu_height=len(choices), default_item=choices[default_item][0],
 762             title="Image Customization Menu")
 763
 764         if code in (d.DIALOG_CANCEL, d.DIALOG_ESC):
 765             break
 766         elif choice in actions:
 767             default_item = [entry[0] for entry in choices].index(choice)
 768             if actions[choice](session):
 769                 default_item = (default_item + 1) % len(choices)
 770
 771
 772 def main_menu(session):
 773     """Show the main menu of the program"""
 774     d = session['dialog']
 775
 776     update_background_title(session)
 777
 778     choices = [("Customize", "Customize image & cloud deployment options"),
 779                ("Register", "Register image to a cloud"),
 780                ("Extract", "Dump image to local file system"),
 781                ("Reset", "Reset everything and start over again"),
 782                ("Help", "Get help for using snf-image-creator")]
 783
 784     default_item = "Customize"
 785
 786     actions = {"Customize": customization_menu, "Register": kamaki_menu,
 787                "Extract": extract_image}
 788     while 1:
 789         (code, choice) = d.menu(
 790             text="Choose one of the following or press <Exit> to exit.",
 791             width=WIDTH, choices=choices, cancel="Exit", height=13,
 792             default_item=default_item, menu_height=len(choices),
 793             title="Image Creator for ~okeanos (snf-image-creator version %s)" %
 794                   version)
 795
 796         if code in (d.DIALOG_CANCEL, d.DIALOG_ESC):
 797             if confirm_exit(d):
 798                 break
 799         elif choice == "Reset":
 800             if confirm_reset(d):
 801                 d.infobox("Resetting snf-image-creator. Please wait...",
 802                           width=SMALL_WIDTH)
 803                 raise Reset
 804         elif choice == "Help":
 805             d.msgbox("For help, check the online documentation:\n\nhttp://www"
 806                      ".synnefo.org/docs/snf-image-creator/latest/",
 807                      width=WIDTH, title="Help")
 808         elif choice in actions:
 809             actions[choice](session)
 810
 811 # vim: set sta sts=4 shiftwidth=4 sw=4 et ai :