diskoImageScript: improve documentation for testing inside a VM

[Mic92]

No description provided.

[zackw]

Hey, thanks for improving the documentation here! Can I make just one small additional suggestion: please add instructions for making your test VM overlay-mount /nix/store from the host, so people don't have to use copyNixStore = true?

[Mic92]

Hey, thanks for improving the documentation here! Can I make just one small additional suggestion: please add instructions for making your test VM overlay-mount /nix/store from the host, so people don't have to use copyNixStore = true?

Not quite sure what this means. Currently this just tests the built image. Why would we share state with the host system?

[Mic92]

What you are proposing sounds more like the qemu-vm.nix profile.

[zackw]

Unless #778 gets merged (and currently I don't think it should be merged, for reasons discussed over there), the vmWithDisko output is not useful to me. You added nice clear instructions for how to use the disk image produced by diskoImageScript for testing, in the same way one might use vmWithDisko. But because I'm only using it for testing, I would like those instructions to explain how to share /nix/store with the host, so I don't have to twiddle my thumbs while it's copied into the disk image, repeat on every test cycle. Does that make sense?