Detect GPT partition table before installing in non-EFI mode

[mika]

If a system was installed in EFI mode and a GPT partition is used, installing GRUB fails pretty at the end of the grml-debootstrap run, if the grml-debootstrap run doesn't use EFI then. This is annoying and I would like us to detect it and at least warn the user about it upfront, so the user can switch partition table to msdos or use EFI mode for installation instead.

[zeha]

It took me a few reads to understand what this ticket is saying, I think it says:

If --efi ... is not passed to grml-debootstrap, but the machine we're running on uses EFI to boot (+ GPT partition table on target device), installing grub fails.

Yes? What about --vmefi?

[mika]

It took me a few reads to understand what this ticket is saying, I think it says:

Haha yeah sorry, I was on the run back then and had hard times myself as well now 8-)

If --efi ... is not passed to grml-debootstrap, but the machine we're running on uses EFI to boot
(+ GPT partition table on target device), installing grub fails.

Exactly!

Yes? What about --vmefi?

Sorry, can you please elaborate what you're suggesting hereby? :) (The --vmefi stuff only runs in VM use case, not when running grml-debootstrap to install a non-VM?)