tools: split calling qubes.PostInstall service to a separate function

The code is long enough to warrant separate function (suggested by
pylint).

qubesadmin/tools/qvm_template_postprocess.py

@@ -31,8 +31,6 @@ import sys
 
 import grp
 
-import time
-
 import qubesadmin
 import qubesadmin.exc
 import qubesadmin.tools
@@ -142,39 +140,12 @@ def import_appmenus(vm, source_dir):
     except subprocess.CalledProcessError as e:
         vm.log.warning('Failed to set default application list: %s', e)
 
-
 @asyncio.coroutine
-def post_install(args):
-    '''Handle post-installation tasks'''
+def call_postinstall_service(vm):
+    '''Call qubes.PostInstall service
 
-    app = args.app
-    try:
-        # reinstall
-        vm = app.domains[args.name]
-    except KeyError:
-        if app.qubesd_connection_type == 'socket' and \
-                args.dir == '/var/lib/qubes/vm-templates/' + args.name:
-            # vm.create_on_disk() need to create the directory on its own,
-            # move it away for from its way
-            tmp_sourcedir = os.path.join('/var/lib/qubes/vm-templates',
-                'tmp-' + args.name)
-            shutil.move(args.dir, tmp_sourcedir)
-            args.dir = tmp_sourcedir
-
-        vm = app.add_new_vm('TemplateVM',
-            name=args.name,
-            label=qubesadmin.config.defaults['template_label'])
-
-    vm.log.info('Importing data')
-    try:
-        import_root_img(vm, args.dir)
-    except:
-        # if data import fails, remove half-created VM
-        del app.domains[vm.name]
-        raise
-    import_appmenus(vm, args.dir)
-
-    if not args.skip_start:
+    And adjust related settings (netvm, features).
+    '''
     # just created, so no need to save previous value - we know what it was
     vm.netvm = None
     # temporarily enable qrexec feature - so vm.start() will wait for it;
@@ -209,6 +180,41 @@ def post_install(args):
     finally:
         vm.netvm = qubesadmin.DEFAULT
 
+
+@asyncio.coroutine
+def post_install(args):
+    '''Handle post-installation tasks'''
+
+    app = args.app
+    try:
+        # reinstall
+        vm = app.domains[args.name]
+    except KeyError:
+        if app.qubesd_connection_type == 'socket' and \
+                args.dir == '/var/lib/qubes/vm-templates/' + args.name:
+            # vm.create_on_disk() need to create the directory on its own,
+            # move it away for from its way
+            tmp_sourcedir = os.path.join('/var/lib/qubes/vm-templates',
+                'tmp-' + args.name)
+            shutil.move(args.dir, tmp_sourcedir)
+            args.dir = tmp_sourcedir
+
+        vm = app.add_new_vm('TemplateVM',
+            name=args.name,
+            label=qubesadmin.config.defaults['template_label'])
+
+    vm.log.info('Importing data')
+    try:
+        import_root_img(vm, args.dir)
+    except:
+        # if data import fails, remove half-created VM
+        del app.domains[vm.name]
+        raise
+    import_appmenus(vm, args.dir)
+
+    if not args.skip_start:
+        yield from call_postinstall_service(vm)
+
     return 0