30 lines
1.2 KiB
Nix
30 lines
1.2 KiB
Nix
|
{ config, lib, pkgs, ... }: {
|
||
|
|
sdImage.expandOnBoot = false;
|
||
|
|
boot.postBootCommands = ''
|
||
|
|
# On the first boot do some maintenance tasks
|
||
|
|
if [ -f /mnt/image/nix-path-registration ]; then
|
||
|
|
set -euo pipefail
|
||
|
|
set -x
|
||
|
|
# Figure out device names for the boot device and root filesystem.
|
||
|
|
rootPart=$(${pkgs.util-linux}/bin/findmnt -n -o SOURCE /mnt/image)
|
||
|
|
bootDevice=$(lsblk -npo PKNAME $rootPart)
|
||
|
|
partNum=$(lsblk -npo MAJ:MIN $rootPart | ${pkgs.gawk}/bin/awk -F: '{print $2}')
|
||
|
|
|
||
|
|
# Resize the root partition and the filesystem to fit the disk
|
||
|
|
echo ",+," | sfdisk -N$partNum --no-reread $bootDevice
|
||
|
|
${pkgs.parted}/bin/partprobe
|
||
|
|
${pkgs.e2fsprogs}/bin/resize2fs $rootPart
|
||
|
|
|
||
|
|
# Register the contents of the initial Nix store
|
||
|
|
${config.nix.package.out}/bin/nix-store --load-db < /mnt/image/nix-path-registration
|
||
|
|
|
||
|
|
# nixos-rebuild also requires a "system" profile and an /etc/NIXOS tag.
|
||
|
|
touch /etc/NIXOS
|
||
|
|
${config.nix.package.out}/bin/nix-env -p /nix/var/nix/profiles/system --set /run/current-system
|
||
|
|
|
||
|
|
# Prevents this from running on later boots.
|
||
|
|
rm -f /mnt/image/nix-path-registration
|
||
|
|
fi
|
||
|
|
'';
|
||
|
|
}
|