Feature Request: allow to resize disk images

[josetesan]

Hi, I love lume, it's easy, fast and nice, thanks a lot.

I'd like lume to be able to resize images, albeit on an experimental status maybe, and only for certain cases on the beginning.+

For example, I did create a 50gb vm for macos15, but once started, needed updates requested me for 15gb more, so I resized the image to 70gb.
Now, all updates are done, but I'm kept with a 70gb image size where just 30gb are used.

macbook-air:~ josete$ lume ls
[2026-01-27T18:36:36Z] INFO: Cleaned up stale session file name=mac-os-15
name                                    os      cpu     memory  disk            
mac-os-15                               macOS   3       3.50G   27.5GB/65.0GB

Could there be some kind , maybe when cloning, to just copy the used file bytes ( and maybe allow to --expand-with=5gb flag to increase it for free space ) ?

Thanks a lot.

[sudhanshu112233shukla]

@f-trycua , @josetesan do check it

[f-trycua]

Some users from the Discord previously attempted this, but without success. If anyone would like to pick up this issue, it would be very welcome.

Some references: utmapp/UTM#4186 (comment)

[sudhanshu112233shukla]

@f-trycua working on it i will update the same PR with the chages which will solve the issue !!!