archboot/usr/lib/initcpio/install/archboot_grub

#!/usr/bin/env bash
# Created by Tobias Powalowski <tpowa@archlinux.org>

build ()
{
    map add_binary grub-editenv grub-fstest grub-menulst2cfg grub-mkfont \
          grub-mkimage grub-mklayout grub-mkpasswd-pbkdf2 grub-mkrelpath \
	  grub-mount grub-script-check grub-bios-setup \
	  grub-ofpathname grub-probe grub-kbdcomp grub-mkrescue grub-mkstandalone grub-install \
              grub-mkconfig grub-mknetdir grub-reboot grub-set-default
    ## add grub-mkconfig helper scripts
    map add_file "/usr/share/grub/grub-mkconfig_lib" "/etc/default/grub"
    add_full_dir "/etc/grub.d"
    if [[ "$(uname -m)" == "x86_64" ]]; then
        # add bios and x86_64-efi files
        # i386 efi is very rare. They are only used in old Macs, 
        # in which the kernel itself has issues booting in EFI mode
        map add_full_dir /usr/lib/grub/i386-pc /usr/lib/grub/x86_64-efi
    fi
    
    if [[ "$(uname -m)" == "aarch64" ]]; then
        # add aarch64 arm64-efi files
        add_full_dir /usr/lib/grub/arm64-efi
    fi
    
    ## add grub(2) unicode font file
    add_file "/usr/share/grub/unicode.pf2"    
}

help ()
{
cat<<HELPEOF
  This hook includes grub(2) on an archboot image.
HELPEOF
}