[bug#41011] [PATCH] gnu: grub: Support for network boot via tftp/nfs.

[Stefan]

Hi!

This debbugs thread got already very long. Therefore I would like to focus on 
the grub changes in this ticket done with my last patch, see 
<https://debbugs.gnu.org/cgi/bugreport.cgi?bug=41011#95>

This patch only introduces a new grub-net bootloader, which basically installs 
grub via its grub-mknetdir command.

There is no modification of other bootloaders. The restriction of the 
“/boot/grub/grub.cfg” file remains.

As usually the DHCP option 67 “Bootfile name” is involved to point the EFI of a 
machine to the file to boot via TFTP, I chose to export (install-grub-net 
subdir) as well to be able to modify that path, whose default is 
/boot/efi/Guix/boot[x64|aa64|…].efi, to something else, e.g.

(bootloader (inherit grub-net-bootloader (installer (install-grub-net 
"efi/machine-1"))))

To be able to boot different machines with their own guix installation, 
however, there is still the problem to provide to each an own grub.cfg file via 
TFTP. This file – as you know – has still a hard coded path of 
/boot/grub/grub.cfg. But this is a different issue and should not be tackled 
with this patch.


Bye

Stefan