Add command line option to shutdown running calibre

src/calibre/gui2/main.py

@@ -40,6 +40,11 @@ path_to_ebook to the database.
     parser.add_option('--ignore-plugins', default=False, action='store_true',
             help=_('Ignore custom plugins, useful if you installed a plugin'
                 ' that is preventing calibre from starting'))
+    parser.add_option('-s', '--shutdown-running-calibre', default=False,
+            action='store_true',
+            help=_('Cause a running calibre instance, if any, to be'
+                ' shutdown. Note that if there are running jobs, they '
+                'will be silently aborted, so use with care.'))
     return parser
 
 def init_qt(args):
@@ -339,7 +344,7 @@ def cant_start(msg=_('If you are sure it is not running')+', ',
 
     raise SystemExit(1)
 
-def communicate(args):
+def communicate(opts, args):
     t = RC()
     t.start()
     time.sleep(3)
@@ -348,6 +353,9 @@ def communicate(args):
         cant_start(what=_('try deleting the file')+': '+f)
         raise SystemExit(1)
 
+    if opts.shutdown_running_calibre:
+        t.conn.send('shutdown:')
+    else:
         if len(args) > 1:
             args[1] = os.path.abspath(args[1])
         t.conn.send('launched:'+repr(args))
@@ -365,6 +373,8 @@ def main(args=sys.argv):
     from calibre.utils.lock import singleinstance
     from multiprocessing.connection import Listener
     si = singleinstance('calibre GUI')
+    if si and opts.shutdown_running_calibre:
+        return 0
     if si:
         try:
             listener = Listener(address=ADDRESS)
@@ -390,10 +400,10 @@ def main(args=sys.argv):
     else:
         # On windows only singleinstance can be trusted
         otherinstance = True if iswindows else False
-    if not otherinstance:
+    if not otherinstance and not opts.shutdown_running_calibre:
         return run_gui(opts, args, actions, listener, app, gui_debug=gui_debug)
 
-    communicate(args)
+    communicate(opts, args)
 
     return 0
 

src/calibre/gui2/ui.py

@@ -446,6 +446,8 @@ class Main(MainWindow, MainWindowMixin, DeviceMixin, EmailMixin, # {{{
             self.library_view.model().refresh()
             self.library_view.model().research()
             self.tags_view.recount()
+        elif msg.startswith('shutdown:'):
+            self.quit(confirm_quit=False)
         else:
             print msg
 
@@ -599,8 +601,9 @@ class Main(MainWindow, MainWindowMixin, DeviceMixin, EmailMixin, # {{{
         dynamic.set('sort_history', self.library_view.model().sort_history)
         self.save_layout_state()
 
-    def quit(self, checked=True, restart=False, debug_on_restart=False):
-        if not self.confirm_quit():
+    def quit(self, checked=True, restart=False, debug_on_restart=False,
+            confirm_quit=True):
+        if confirm_quit and not self.confirm_quit():
             return
         try:
             self.shutdown()

src/calibre/manual/creating_plugins.rst

@@ -195,9 +195,10 @@ It can get tiresome to keep re-adding a plugin to calibre to test small changes.
 
 Once you've located the zip file of your plugin you can then directly update it with your changes instead of re-adding it each time. To do so from the command line, in the directory that contains your plugin source code, use::
 
-    zip -R /path/to/plugin/zip/file.zip *
+    calibre -s; sleep 4s; zip -R /path/to/plugin/zip/file.zip *; calibre
 
-This will update all changed files. It relies on the freely available zip command line tool. Note that you should quit calibre before running this command.
+This will shutdown a running calibre. Wait for the shutdown to complete, then update your plugin files and relaunch calibre.
+It relies on the freely available zip command line tool.
 
 More plugin examples
 ----------------------