Use the Qubes isolation provider from CLI/GUI

Autodetect in the CLI/GUI if we should run the conversion in disposable
qubes.

dangerzone/cli.py

@@ -6,9 +6,11 @@ import click
 from colorama import Back, Fore, Style
 
 from . import args, errors
+from .conversion.common import running_on_qubes
 from .document import ARCHIVE_SUBDIR, SAFE_EXTENSION
 from .isolation_provider.container import Container
 from .isolation_provider.dummy import Dummy
+from .isolation_provider.qubes import Qubes
 from .logic import DangerzoneCore
 from .util import get_version
 
@@ -63,6 +65,8 @@ def cli_main(
 
     if getattr(sys, "dangerzone_dev", False) and dummy_conversion:
         dangerzone = DangerzoneCore(Dummy())
+    elif running_on_qubes():
+        dangerzone = DangerzoneCore(Qubes())
     else:
         dangerzone = DangerzoneCore(Container(enable_timeouts=enable_timeouts))
 

dangerzone/gui/__init__.py

@@ -21,9 +21,11 @@ else:
         from PySide2 import QtCore, QtGui, QtWidgets
 
 from .. import args, errors
+from ..conversion.common import running_on_qubes
 from ..document import Document
 from ..isolation_provider.container import Container
 from ..isolation_provider.dummy import Dummy
+from ..isolation_provider.qubes import Qubes
 from ..util import get_resource_path, get_version
 from .logic import DangerzoneGui
 from .main_window import MainWindow
@@ -100,6 +102,9 @@ def gui_main(
     if getattr(sys, "dangerzone_dev", False) and dummy_conversion:
         dummy = Dummy()
         dangerzone = DangerzoneGui(app, isolation_provider=dummy)
+    elif running_on_qubes():
+        qubes = Qubes()
+        dangerzone = DangerzoneGui(app, isolation_provider=qubes)
     else:
         container = Container(enable_timeouts=enable_timeouts)
         dangerzone = DangerzoneGui(app, isolation_provider=container)

dangerzone/gui/main_window.py

@@ -24,6 +24,7 @@ from .. import errors
 from ..document import SAFE_EXTENSION, Document
 from ..isolation_provider.container import Container, NoContainerTechException
 from ..isolation_provider.dummy import Dummy
+from ..isolation_provider.qubes import Qubes
 from ..util import get_resource_path, get_subprocess_startupinfo, get_version
 from .logic import Alert, DangerzoneGui
 
@@ -71,8 +72,10 @@ class MainWindow(QtWidgets.QMainWindow):
             self.waiting_widget: WaitingWidget = WaitingWidgetContainer(self.dangerzone)
             self.waiting_widget.finished.connect(self.waiting_finished)
 
-        elif isinstance(self.dangerzone.isolation_provider, Dummy):
+        elif isinstance(self.dangerzone.isolation_provider, Dummy) or isinstance(
-            # Don't wait with dummy converter
+            self.dangerzone.isolation_provider, Qubes
+        ):
+            # Don't wait with dummy converter and on Qubes.
             self.waiting_widget = WaitingWidget()
             self.dangerzone.is_waiting_finished = True