Add --yes option and confirm prompt.

qubesadmin/tools/qvm_remove.py

@@ -28,14 +28,26 @@ from qubesadmin.tools import QubesArgumentParser
 parser = QubesArgumentParser(description=__doc__,
                              want_app=True,
                              vmname_nargs='+')
+parser.add_argument("--yes", action="store_true", dest="no_confirm",
+    default=False, help="Do not prompt for confirmation")
+
 
 
 def main(args=None, app=None):  # pylint: disable=missing-docstring
     args = parser.parse_args(args, app=app)
+    go_ahead = ""
+    if not args.no_confirm:
+        print("This will completely remove the selected VM(s)...")
+        go_ahead = input("Are you sure? [y/N] ").upper()
+
+    if args.no_confirm or go_ahead == "Y":
         for vm in args.domains:
             del args.app.domains[vm.name]
-
         return 0
+    else:
+        print("Remove cancelled.")
+        return 1
+
 
 
 if __name__ == '__main__':