Request: provide a method for installing custom kernels

[flukejones]

Per discussion on matrix:

To ease kernel development on serpent a method for installing a custom kernel such that the kernel binary, modules, and efi entry are not overwritten whenever a FS blit is done.

My current method for installing a kernel I build from git is as follow:

sudo mkdir /efi/EFI/serpentos/6.12.8
sudo mkdir /lib/kernel/6.12.8

make LLVM=1 INSTALL_MOD_STRIP=1 all -j$(nproc)

sudo mount /dev/nvme0n1p1 /efi
sudo mkdir /efi/EFI/serpentos/6.12.8
sudo mkdir /lib/kernel/6.12.8

make LLVM=1 INSTALL_MOD_STRIP=1 all -j$(nproc)
sudo cp ~/Projects/asus-linux/linux/arch/x86_64/boot/bzImage /efi/EFI/serpentos/6.12.8/vmlinuz
sudo make LLVM=1 INSTALL_MOD_STRIP=1 modules_install -j$(nproc)

sudo dracut --strip --tmpdir /tmp -N -f \
--kmoddir /lib/modules/6.12.8-00028-g982f084df5f5 --kver 6.12.8-00028-g982f084df5f5 --add "bash rescue systemd virtiofs lvm dm" \
--strip --hardlink --nomdadmconf --nolvmconf --add-drivers "qxl virtio-gpu" --zstd --early-microcode --fwdir /lib/firmware \
--include /home/gamer/Projects/serpentos/recipes/l/linux-desktop/pkg/depmod.conf /lib/depmod.d/depmod.conf \
/lib/kernel/6.12.8/50-default.initrd

sudo cp -f /lib/kernel/6.12.8/50-default.initrd /efi/EFI/serpentos/6.12.8/

with an extra entry at /efi/loader/entries/serpentos-6.12.8-72.desktop-17.conf with required setup. This gets me to where I need to be with a booted kernel, and able to reload the current driver I'm working on with sudo insmod drivers/hid/hid-asus-ally.ko (at git source)

[ermo]

󰌽 ermo@virgil:~/repos/serpent-os/recipes/l/linux-desktop/pkg [  main ? ]                                                04:00
❯ cat boot.json 
{
  "name": "linux-desktop",
  "version": "@VERSION@",
  "variant": "desktop"
}

Based on the above, I think it might be as simple as you copying to a new directory like, say, linux-asus-ally and then modifying the boot.json to contain

{
  "name": "linux-asus-ally",
  "version": "@VERSION@",
  "variant": "desktop"
}

(and editing the stone.yaml name to match) maybe...?

@ikeycode Guidance welcome.