The mkdir on line 118 had braces inside double quotes, so bash created
a single directory named '{home,var/cache,var/log,.snapshots,boot}'
instead of five separate ones. Every subsequent subvolume mount
(/home, /var/cache, etc.) then failed. Also: detect EFI vs BIOS boot
for grub-install instead of hard-coding x86_64-efi (which bricks under
set -eu on BIOS-only machines), and surface mkinitcpio failures instead
of swallowing them.
c-ludenberg
da5a59a2e5