vng: override kconfig with '--force'

By default, vng --build and --kconfig will not modify existing kconfig,
even if new kconfig files are given. The idea is to let people modifying
them manually.

It is now possible to force the modification of the kconfig by using
'--force'.

Suggested-by: Andrea Righi <andrea.righi@canonical.com>
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>

virtme_ng/run.py

@@ -408,7 +408,8 @@ def make_parser():
         "--force",
         action="store_true",
         help="Force reset git repository to target branch or commit "
-        "(warning: this may drop uncommitted changes)",
+        "(warning: this may drop uncommitted changes), "
+        "and force kernel config override",
     )
 
     parser.add_argument(
@@ -565,7 +566,9 @@ def checkout(self, args):
     def config(self, args):
         """Perform a make config operation on a kernel source directory."""
         arch = args.arch
-        cmd = "virtme-configkernel --defconfig --no-update"
+        cmd = "virtme-configkernel --defconfig"
+        if not args.force:
+            cmd += " --no-update"
         if arch is not None:
             if arch not in ARCH_MAPPING:
                 arg_fail(f"unsupported architecture: {arch}")