Invalid option error when it's in fact a missing xmake.lua

[A2va]

Xmake Version

v2.9.5+dev.478972cd9

Operating System Version and Architecture

Windows 10

Describe Bug

To reproduce the bug, clone the xmake repository but do not checkout the submodules, then try to enable a project-specific config that is not part of the default one.

xmake\core> xmake f -p windows --embed=true 
Error: Invalid option: --embed=true

I think it's because xmake knows there's another sub xmake.lua that it doesn't validate the embed option.
If the embed config is now removed from the command:

xmake\core> xmake f -p windows --embed=true 
Error: file(D:\Dev\xmake\core\src\sv\sv\xmake.lua): file not found!

Now, as a user, I know that something is missing in that directory, but before I just couldn't predict that was the root cause.

Expected Behavior

The best behavior would be to show only error: file(D:\Dev\xmake\core\src\sv\xmake.lua): file not found! and not the invalid option. However, if it's too much work, it's best to show both errors.

Project Configuration

https://github.com/xmake-io/xmake/blob/dev/core/xmake.lua

Additional Information and Error Logs

Nothing relevant to share