Move store plugins to use a GUI wrapper plugin to keep the plugin system happy. Fix segfault with cover download thread pool.

src/calibre/customize/__init__.py

@@ -581,60 +581,41 @@ class PreferencesPlugin(Plugin): # {{{
 
 # }}}
 
-
+class StoreBase(Plugin): # {{{
-class StorePlugin(Plugin): # {{{
+    
-
     supported_platforms = ['windows', 'osx', 'linux']
     author         = 'John Schember'
     type = _('Store')
     # This needs to be changed to (0, 8, 0)
     minimum_calibre_version = (0, 4, 118)
-    
+
-    def open(self, gui, parent=None, detail_item=None, external=False):
+    actual_plugin = None
+    actual_plugin_object = None
+
+    def load_actual_plugin(self, gui):
         '''
-        Open the store.
+        This method must return the actual interface action plugin object.
-        
-        :param gui: The main GUI. This will be used to have the job
-        system start downloading an item from the store.
-        
-        :param parent: The parent of the store dialog. This is used
-        to create modal dialogs.
-        
-        :param detail_item: A plugin specific reference to an item
-        in the store that the user should be shown.
-        
-        :param external: When False open an internal dialog with the
-        store. When True open the users default browser to the store's
-        web site. :param:`detail_item` should still be respected when external
-        is True.
         '''
-        raise NotImplementedError()
+        mod, cls = self.actual_plugin.split(':')
-    
+        self.actual_plugin_object  = getattr(__import__(mod, fromlist=['1'], level=0), cls)(gui, self.name)
-    def search(self, query, max_results=10, timeout=60):
+        return self.actual_plugin_object
-        '''
+
-        Searches the store for items matching query. This should
+    def customization_help(self, gui=False):
-        return items as a generator.
+        if self.actual_plugin_object:
+            return self.actual_plugin_object.customization_help(gui)
+        else:
+            raise NotImplementedError()
         
-        :param query: The string query search with.
+    def config_widget(self):
-        :param max_results: The maximum number of results to return.
+        if self.actual_plugin_object:
-        :param timeout: The maximum amount of time in seconds to spend download the search results.
+            return self.actual_plugin_object.config_widget()
-        
+        else:
-        :return: :class:`calibre.gui2.store.search_result.SearchResult` objects
+            raise NotImplementedError()
-        item_data is plugin specific and is used in :meth:`open` to open to a specifc place in the store.
+
-        '''
+    def save_settings(self, config_widget):
-        raise NotImplementedError()
+        if self.actual_plugin_object:
-    
+            return self.actual_plugin_object.save_settings(config_widget)
-    def get_settings(self):
+        else:
-        '''
+            raise NotImplementedError()
-        This is only useful for plugins that implement
-        :attr:`config_widget` that is the only way to save
-        settings. This is used by plugins to get the saved
-        settings and apply when necessary.
-        
-        :return: A dictionary filled with the settings used
-        by this plugin.
-        '''
-        raise NotImplementedError()
 
 # }}}
-

src/calibre/customize/builtins.py

@@ -5,7 +5,7 @@ __copyright__ = '2008, Kovid Goyal <kovid at kovidgoyal.net>'
 import textwrap, os, glob, functools, re
 from calibre import guess_type
 from calibre.customize import FileTypePlugin, MetadataReaderPlugin, \
-    MetadataWriterPlugin, PreferencesPlugin, InterfaceActionBase
+    MetadataWriterPlugin, PreferencesPlugin, InterfaceActionBase, StoreBase
 from calibre.constants import numeric_version
 from calibre.ebooks.metadata.archive import ArchiveExtract, get_cbz_metadata
 from calibre.ebooks.metadata.opf2 import metadata_to_opf
@@ -1042,12 +1042,32 @@ plugins += [GoogleBooks]
 # }}}
 
 # Store plugins {{{
-from calibre.gui2.store.amazon_plugin import AmazonKindleStore
+class StoreAmazonKindleStore(StoreBase):
-from calibre.gui2.store.gutenberg_plugin import GutenbergStore
+    name = 'Amazon Kindle'
-from calibre.gui2.store.feedbooks_plugin import FeedbooksStore
+    description = _('Kindle books from Amazon')
-from calibre.gui2.store.manybooks_plugin import ManyBooksStore
+    actual_plugin = 'calibre.gui2.store.amazon_plugin:AmazonKindleStore'
-from calibre.gui2.store.smashwords_plugin import SmashwordsStore
 
-plugins += [AmazonKindleStore, GutenbergStore, FeedbooksStore, ManyBooksStore, SmashwordsStore]
+
+class StoreGutenbergStore(StoreBase):
+    name = 'Project Gutenberg'
+    description = _('The first producer of free ebooks.')
+    actual_plugin = 'calibre.gui2.store.gutenberg_plugin:GutenbergStore'
+
+class StoreFeedbooksStore(StoreBase):    
+    name = 'Feedbooks'
+    description = _('Read anywhere.')
+    actual_plugin = 'calibre.gui2.store.feedbooks_plugin:FeedbooksStore'
+    
+class StoreManyBooksStore(StoreBase):
+    name = 'ManyBooks'
+    description = _('The best ebooks at the best price: free!')
+    actual_plugin = 'calibre.gui2.store.manybooks_plugin:ManyBooksStore'
+
+class StoreSmashwordsStore(StoreBase):
+    name = 'Smashwords'
+    description = _('Your ebook. Your way.')
+    actual_plugin = 'calibre.gui2.store.smashwords_plugin:SmashwordsStore'
+
+plugins += [StoreAmazonKindleStore, StoreGutenbergStore, StoreFeedbooksStore, StoreManyBooksStore, StoreSmashwordsStore]
 
 # }}}

src/calibre/customize/ui.py

@@ -8,7 +8,7 @@ from contextlib import closing
 from calibre.customize import Plugin, CatalogPlugin, FileTypePlugin, \
                               MetadataReaderPlugin, MetadataWriterPlugin, \
                               InterfaceActionBase as InterfaceAction, \
-                              PreferencesPlugin, StorePlugin
+                              PreferencesPlugin, StoreBase
 from calibre.customize.conversion import InputFormatPlugin, OutputFormatPlugin
 from calibre.customize.profiles import InputProfile, OutputProfile
 from calibre.customize.builtins import plugins as builtin_plugins
@@ -283,7 +283,7 @@ def preferences_plugins():
 def store_plugins():
     customization = config['plugin_customization']
     for plugin in _initialized_plugins:
-        if isinstance(plugin, StorePlugin):
+        if isinstance(plugin, StoreBase):
             if not is_disabled(plugin):
                 plugin.site_customization = customization.get(plugin.name, '')
                 yield plugin

src/calibre/gui2/actions/store.py

@@ -8,7 +8,6 @@ from functools import partial
 
 from PyQt4.Qt import Qt, QMenu, QToolButton, QDialog, QVBoxLayout
 
-from calibre.customize.ui import store_plugins
 from calibre.gui2.actions import InterfaceAction
 
 class StoreAction(InterfaceAction):
@@ -21,14 +20,14 @@ class StoreAction(InterfaceAction):
         self.store_menu = QMenu()
         self.store_menu.addAction(_('Search'), self.search)
         self.store_menu.addSeparator()
-        for x in store_plugins():
+        for n, p in self.gui.istores.items():
-            self.store_menu.addAction(x.name, partial(self.open_store, x))
+            self.store_menu.addAction(n, partial(self.open_store, p))
         self.qaction.setMenu(self.store_menu)
     
     def search(self):
         from calibre.gui2.store.search import SearchDialog
-        sd = SearchDialog(self.gui, self.gui)
+        sd = SearchDialog(self.gui.istores, self.gui)
         sd.exec_()
         
     def open_store(self, store_plugin):
-        store_plugin.open(self.gui, self.gui)
+        store_plugin.open(self.gui)

src/calibre/gui2/store/__init__.py

@@ -0,0 +1,75 @@
+# -*- coding: utf-8 -*-
+
+__license__ = 'GPL 3'
+__copyright__ = '2011, John Schember <john@nachtimwald.com>'
+__docformat__ = 'restructuredtext en'
+
+class StorePlugin(object): # {{{
+
+    def __init__(self, gui, name):
+        self.gui = gui
+        self.name = name
+        self.base_plugin = None
+    
+    def open(self, gui, parent=None, detail_item=None, external=False):
+        '''
+        Open the store.
+        
+        :param gui: The main GUI. This will be used to have the job
+        system start downloading an item from the store.
+        
+        :param parent: The parent of the store dialog. This is used
+        to create modal dialogs.
+        
+        :param detail_item: A plugin specific reference to an item
+        in the store that the user should be shown.
+        
+        :param external: When False open an internal dialog with the
+        store. When True open the users default browser to the store's
+        web site. :param:`detail_item` should still be respected when external
+        is True.
+        '''
+        raise NotImplementedError()
+    
+    def search(self, query, max_results=10, timeout=60):
+        '''
+        Searches the store for items matching query. This should
+        return items as a generator.
+        
+        :param query: The string query search with.
+        :param max_results: The maximum number of results to return.
+        :param timeout: The maximum amount of time in seconds to spend download the search results.
+        
+        :return: :class:`calibre.gui2.store.search_result.SearchResult` objects
+        item_data is plugin specific and is used in :meth:`open` to open to a specifc place in the store.
+        '''
+        raise NotImplementedError()
+    
+    def get_settings(self):
+        '''
+        This is only useful for plugins that implement
+        :attr:`config_widget` that is the only way to save
+        settings. This is used by plugins to get the saved
+        settings and apply when necessary.
+        
+        :return: A dictionary filled with the settings used
+        by this plugin.
+        '''
+        raise NotImplementedError()
+
+    def do_genesis(self):
+        self.genesis()
+
+    def genesis(self):
+        pass
+    
+    def config_widget(self):
+        raise NotImplementedError()
+    
+    def save_settings(self, config_widget):
+        raise NotImplementedError()
+    
+    def customization_help(self, gui=False):
+        raise NotImplementedError()
+
+# }}}

src/calibre/gui2/store/amazon_plugin.py

@@ -14,15 +14,13 @@ from lxml import html
 from PyQt4.Qt import QUrl
 
 from calibre import browser
-from calibre.customize import StorePlugin
+from calibre.gui2 import open_url
+from calibre.gui2.store import StorePlugin
 from calibre.gui2.store.search_result import SearchResult
 
 class AmazonKindleStore(StorePlugin):
     
-    name           = 'Amazon Kindle'
+    def open(self, parent=None, detail_item=None, external=False):
-    description    = _('Kindle books from Amazon')
-    
-    def open(self, gui, parent=None, detail_item=None):
         '''
         Amazon comes with a number of difficulties.
         
@@ -106,7 +104,6 @@ class AmazonKindleStore(StorePlugin):
         The best (I use the term lightly here) solution is to open Amazon.com
         in the users default browser and set the affiliate id as part of the url.
         '''
-        from calibre.gui2 import open_url
         aff_id = {'tag': 'josbl0e-cpb-20'}
         # Use Kovid's affiliate id 30% of the time.
         if random.randint(1, 10) in (1, 2, 3):

src/calibre/gui2/store/feedbooks_plugin.py

@@ -10,18 +10,14 @@ from contextlib import closing
 from lxml import html
 
 from calibre import browser
-from calibre.customize import StorePlugin
+from calibre.gui2.store import StorePlugin
-from calibre.gui2.store.search_result import SearchResult
+from calibre.gui2.store.basic_config import BasicStoreConfig
+from calibre.gui2.store.web_store_dialog import WebStoreDialog
 
-class FeedbooksStore(StorePlugin):
+class FeedbooksStore(BasicStoreConfig, StorePlugin):
     
-    name           = 'Feedbooks'
+    def open(self, parent=None, detail_item=None, external=False):
-    description    = _('Read anywhere.')
+        d = WebStoreDialog(self.gui, 'http://m.feedbooks.com/', parent, detail_item)
-    
-        
-    def open(self, gui, parent=None, detail_item=None):
-        from calibre.gui2.store.web_store_dialog import WebStoreDialog
-        d = WebStoreDialog(gui, 'http://m.feedbooks.com/', parent, detail_item)
         d.setWindowTitle(self.name)
         d.set_tags(self.name + ',' + _('store'))
         d = d.exec_()
@@ -76,22 +72,3 @@ class FeedbooksStore(StorePlugin):
                 s.detail_item = id.strip()
                 
                 yield s
-
-    def customization_help(self, gui=False):
-        return 'Customize the behavior of this store.'
-
-    def config_widget(self):
-        from calibre.gui2.store.basic_config_widget import BasicStoreConfigWidget
-        return BasicStoreConfigWidget(self)
-
-    def save_settings(self, config_widget):
-        from calibre.gui2.store.basic_config_widget import save_settings
-        save_settings(config_widget)
-
-    def get_settings(self):
-        from calibre.gui2 import gprefs
-        settings = {}
-        
-        settings[self.name + '_tags'] = gprefs.get(self.name + '_tags', self.name + ', store, download')
-        
-        return settings

src/calibre/gui2/store/gutenberg_plugin.py

@@ -10,18 +10,16 @@ from contextlib import closing
 from lxml import html
 
 from calibre import browser
-from calibre.customize import StorePlugin
+from calibre.gui2.store import StorePlugin
+from calibre.gui2.store.basic_config import BasicStoreConfig
 from calibre.gui2.store.search_result import SearchResult
+from calibre.gui2.store.web_store_dialog import WebStoreDialog
 
-class GutenbergStore(StorePlugin):
+class GutenbergStore(BasicStoreConfig, StorePlugin):
-    
-    name           = 'Project Gutenberg'
-    description    = _('The first producer of free ebooks.')
         
-    def open(self, gui, parent=None, detail_item=None):
+    def open(self, parent=None, detail_item=None, external=False):
         settings = self.get_settings()
-        from calibre.gui2.store.web_store_dialog import WebStoreDialog
+        d = WebStoreDialog(self.gui, 'http://m.gutenberg.org/', parent, detail_item)
-        d = WebStoreDialog(gui, 'http://m.gutenberg.org/', parent, detail_item)
         d.setWindowTitle(self.name)
         d.set_tags(settings.get(self.name + '_tags', ''))
         d = d.exec_()
@@ -51,8 +49,9 @@ class GutenbergStore(StorePlugin):
                     continue
                 id = url.split('/')[-1]
                 
-                heading = ''.join(url_a.xpath('text()'))
+                url_a = html.fromstring(html.tostring(url_a))
-                title, _, author = heading.partition('by ')
+                heading = ''.join(url_a.xpath('//text()'))
+                title, _, author = heading.rpartition('by ')
                 author = author.split('-')[0]
                 price = '$0.00'
                 
@@ -66,22 +65,3 @@ class GutenbergStore(StorePlugin):
                 s.detail_item = '/ebooks/' + id.strip()
                 
                 yield s
-
-    def customization_help(self, gui=False):
-        return 'Customize the behavior of this store.'
-
-    def config_widget(self):
-        from calibre.gui2.store.basic_config_widget import BasicStoreConfigWidget
-        return BasicStoreConfigWidget(self)
-
-    def save_settings(self, config_widget):
-        from calibre.gui2.store.basic_config_widget import save_settings
-        save_settings(config_widget)
-
-    def get_settings(self):
-        from calibre.gui2 import gprefs
-        settings = {}
-        
-        settings[self.name + '_tags'] = gprefs.get(self.name + '_tags', self.name + ', store, download')
-        
-        return settings

src/calibre/gui2/store/manybooks_plugin.py

@@ -11,18 +11,15 @@ from contextlib import closing
 from lxml import html
 
 from calibre import browser
-from calibre.customize import StorePlugin
+from calibre.gui2.store import StorePlugin
+from calibre.gui2.store.basic_config import BasicStoreConfig
 from calibre.gui2.store.search_result import SearchResult
-
+from calibre.gui2.store.web_store_dialog import WebStoreDialog
-class ManyBooksStore(StorePlugin):
-    
-    name           = 'ManyBooks'
-    description    = _('The best ebooks at the best price: free!')
-    
         
-    def open(self, gui, parent=None, detail_item=None):
+class ManyBooksStore(BasicStoreConfig, StorePlugin):
-        from calibre.gui2.store.web_store_dialog import WebStoreDialog
+
-        d = WebStoreDialog(gui, 'http://manybooks.net/', parent, detail_item)
+    def open(self, parent=None, detail_item=None, external=False):
+        d = WebStoreDialog(self.gui, 'http://manybooks.net/', parent, detail_item)
         d.setWindowTitle(self.name)
         d.set_tags(self.name + ',' + _('store'))
         d = d.exec_()
@@ -55,8 +52,9 @@ class ManyBooksStore(StorePlugin):
                 id = url.split('/')[-1]
                 id = id.strip()
                 
-                heading = ''.join(url_a.xpath('text()'))
+                url_a = html.fromstring(html.tostring(url_a))
-                title, _, author = heading.partition('by ')
+                heading = ''.join(url_a.xpath('//text()'))
+                title, _, author = heading.rpartition('by ')
                 author = author.split('-')[0]
                 price = '$0.00'
                 
@@ -78,22 +76,3 @@ class ManyBooksStore(StorePlugin):
                 s.detail_item = '/titles/' + id
                 
                 yield s
-
-    def customization_help(self, gui=False):
-        return 'Customize the behavior of this store.'
-
-    def config_widget(self):
-        from calibre.gui2.store.basic_config_widget import BasicStoreConfigWidget
-        return BasicStoreConfigWidget(self)
-
-    def save_settings(self, config_widget):
-        from calibre.gui2.store.basic_config_widget import save_settings
-        save_settings(config_widget)
-
-    def get_settings(self):
-        from calibre.gui2 import gprefs
-        settings = {}
-        
-        settings[self.name + '_tags'] = gprefs.get(self.name + '_tags', self.name + ', store, download')
-        
-        return settings

src/calibre/gui2/store/search.py

@@ -16,7 +16,6 @@ from PyQt4.Qt import Qt, QAbstractItemModel, QDialog, QTimer, QVariant, \
     QPushButton 
 
 from calibre import browser
-from calibre.customize.ui import store_plugins
 from calibre.gui2 import NONE
 from calibre.gui2.store.search_ui import Ui_Dialog
 from calibre.utils.icu import sort_key
@@ -29,17 +28,12 @@ COVER_DOWNLOAD_THREAD_TOTAL = 2
 
 class SearchDialog(QDialog, Ui_Dialog):
 
-    def __init__(self, gui, *args):
+    def __init__(self, istores, *args):
         QDialog.__init__(self, *args)
         self.setupUi(self)
-        
-        # We pass this on to the store plugins so they can
-        # tell the gui's job system to start downloading an
-        # item.
-        self.gui = gui
 
         # We keep a cache of store plugins and reference them by name.
-        self.store_plugins = {}
+        self.store_plugins = istores
         self.search_pool = SearchThreadPool(SearchThread, SEARCH_THREAD_TOTAL)
         # Check for results and hung threads.
         self.checker = QTimer()
@@ -53,12 +47,11 @@ class SearchDialog(QDialog, Ui_Dialog):
         # per search basis.
         stores_group_layout = QVBoxLayout()
         self.stores_group.setLayout(stores_group_layout)
-        for x in store_plugins():
+        for x in self.store_plugins:
-            self.store_plugins[x.name] = x
+            cbox = QCheckBox(x)
-            cbox = QCheckBox(x.name)
             cbox.setChecked(True)
             stores_group_layout.addWidget(cbox)
-            setattr(self, 'store_check_' + x.name, cbox)
+            setattr(self, 'store_check_' + x, cbox)
         stores_group_layout.addStretch()
 
         self.search.clicked.connect(self.do_search)
@@ -122,7 +115,7 @@ class SearchDialog(QDialog, Ui_Dialog):
             self.checker.stop()
         else:
             # Stop the checker if not threads are running.
-            if not self.search_pool.threads_running():
+            if not self.search_pool.threads_running() and not self.search_pool.has_tasks():
                 self.checker.stop()
         
         while self.search_pool.has_results():
@@ -132,7 +125,7 @@ class SearchDialog(QDialog, Ui_Dialog):
 
     def open_store(self, index):
         result = self.results_view.model().get_result(index)
-        self.store_plugins[result.store_name].open(self.gui, self, result.detail_item)
+        self.store_plugins[result.store_name].open(self, result.detail_item)
 
     def get_store_checks(self):
         '''
@@ -156,6 +149,10 @@ class SearchDialog(QDialog, Ui_Dialog):
     def stores_select_none(self):
         for check in self.get_store_checks():
             check.setChecked(False)
+            
+    def closeEvent(self, e):
+        self.model.closing()
+        QDialog.closeEvent(self, e)
 
 
 class GenericDownloadThreadPool(object):
@@ -305,6 +302,9 @@ class Matches(QAbstractItemModel):
         self.matches = []
         self.cover_pool = CoverThreadPool(CoverThread, 2)
         self.cover_pool.start_threads()
+
+    def closing(self):
+        self.cover_pool.abort()
         
     def clear_results(self):
         self.matches = []
@@ -315,7 +315,6 @@ class Matches(QAbstractItemModel):
     def add_result(self, result):
         self.layoutAboutToBeChanged.emit()
         self.matches.append(result)
-        
         self.cover_pool.add_task(result, self.update_result)
         self.layoutChanged.emit()
 

src/calibre/gui2/store/smashwords_plugin.py

@@ -12,22 +12,19 @@ from contextlib import closing
 from lxml import html
 
 from calibre import browser
-from calibre.customize import StorePlugin
+from calibre.gui2.store import StorePlugin
+from calibre.gui2.store.basic_config import BasicStoreConfig
 from calibre.gui2.store.search_result import SearchResult
+from calibre.gui2.store.web_store_dialog import WebStoreDialog
 
-class SmashwordsStore(StorePlugin):
+class SmashwordsStore(BasicStoreConfig, StorePlugin):
-    
+
-    name           = 'Smashwords'
+    def open(self, parent=None, detail_item=None, external=False):
-    description    = _('Your ebook. Your way.')
-    
-        
-    def open(self, gui, parent=None, detail_item=None):
-        from calibre.gui2.store.web_store_dialog import WebStoreDialog
         aff_id = 'usernone'
         # Use Kovid's affiliate id 30% of the time.
         if random.randint(1, 10) in (1, 2, 3):
             aff_id = 'kovidgoyal'
-        d = WebStoreDialog(gui, 'http://www.smashwords.com/?ref=%s' % aff_id, parent, detail_item)
+        d = WebStoreDialog(self.gui, 'http://www.smashwords.com/?ref=%s' % aff_id, parent, detail_item)
         d.setWindowTitle(self.name)
         d.set_tags(self.name + ',' + _('store'))
         d = d.exec_()
@@ -78,22 +75,3 @@ class SmashwordsStore(StorePlugin):
                 s.detail_item = '/books/view/' + id.strip()
                 
                 yield s
-
-    def customization_help(self, gui=False):
-        return 'Customize the behavior of this store.'
-
-    def config_widget(self):
-        from calibre.gui2.store.basic_config_widget import BasicStoreConfigWidget
-        return BasicStoreConfigWidget(self)
-
-    def save_settings(self, config_widget):
-        from calibre.gui2.store.basic_config_widget import save_settings
-        save_settings(config_widget)
-
-    def get_settings(self):
-        from calibre.gui2 import gprefs
-        settings = {}
-        
-        settings[self.name + '_tags'] = gprefs.get(self.name + '_tags', self.name + ', store, download')
-        
-        return settings

src/calibre/gui2/ui.py

@@ -22,7 +22,7 @@ from calibre.ptempfile import PersistentTemporaryFile
 from calibre.utils.config import prefs, dynamic
 from calibre.utils.ipc.server import Server
 from calibre.library.database2 import LibraryDatabase2
-from calibre.customize.ui import interface_actions
+from calibre.customize.ui import interface_actions, store_plugins
 from calibre.gui2 import error_dialog, GetMetadata, open_local_file, \
         gprefs, max_available_height, config, info_dialog, Dispatcher, \
         question_dialog
@@ -102,6 +102,7 @@ class Main(MainWindow, MainWindowMixin, DeviceMixin, EmailMixin, # {{{
         self.device_connected = None
         self.gui_debug = gui_debug
         self.iactions = OrderedDict()
+        # Actions
         for action in interface_actions():
             if opts.ignore_plugins and action.plugin_path is not None:
                 continue
@@ -114,11 +115,24 @@ class Main(MainWindow, MainWindowMixin, DeviceMixin, EmailMixin, # {{{
                 if action.plugin_path is None:
                     raise
                 continue
-
             ac.plugin_path = action.plugin_path
             ac.interface_action_base_plugin = action
-
             self.add_iaction(ac)
+        # Stores
+        self.istores = OrderedDict()
+        for store in store_plugins():
+            if opts.ignore_plugins and store.plugin_path is not None:
+                continue
+            try:
+                st = self.init_istore(store)
+                self.add_istore(st)
+            except:
+                # Ignore errors in loading user supplied plugins
+                import traceback
+                traceback.print_exc()
+                if store.plugin_path is None:
+                    raise
+                continue
 
     def init_iaction(self, action):
         ac = action.load_actual_plugin(self)
@@ -126,6 +140,13 @@ class Main(MainWindow, MainWindowMixin, DeviceMixin, EmailMixin, # {{{
         ac.interface_action_base_plugin = action
         action.actual_iaction_plugin_loaded = True
         return ac
+    
+    def init_istore(self, store):
+        st = store.load_actual_plugin(self)
+        st.plugin_path = store.plugin_path
+        st.base_plugin = store
+        store.actual_istore_plugin_loaded = True
+        return st
 
     def add_iaction(self, ac):
         acmap = self.iactions
@@ -134,6 +155,14 @@ class Main(MainWindow, MainWindowMixin, DeviceMixin, EmailMixin, # {{{
                 acmap[ac.name] = ac
         else:
             acmap[ac.name] = ac
+            
+    def add_istore(self, st):
+        stmap = self.istores
+        if st.name in stmap:
+            if st.priority >= stmap[st.name].priority:
+                stmap[st.name] = st
+        else:
+            stmap[st.name] = st
 
 
     def initialize(self, library_path, db, listener, actions, show_gui=True):
@@ -155,6 +184,8 @@ class Main(MainWindow, MainWindowMixin, DeviceMixin, EmailMixin, # {{{
 
         for ac in self.iactions.values():
             ac.do_genesis()
+        for st in self.istores.values():
+            st.do_genesis()
         MainWindowMixin.__init__(self, db)
 
         # Jobs Button {{{