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# This is a test utility that automatically formats
# `config.virtualisation.rootDevice` in the initrd.
# Note that when you are using
# `boot.initrd.systemd.enable = true`, you can use
# `virtualisation.fileSystems."/".autoFormat = true;`
# instead.
{ lib, config, pkgs, ... }:
let
rootDevice = config.virtualisation.rootDevice;
in
{
boot.initrd.extraUtilsCommands = lib.mkIf (!config.boot.initrd.systemd.enable) ''
# We need mke2fs in the initrd.
copy_bin_and_libs ${pkgs.e2fsprogs}/bin/mke2fs
'';
boot.initrd.postDeviceCommands = lib.mkIf (!config.boot.initrd.systemd.enable) ''
# If the disk image appears to be empty, run mke2fs to
# initialise.
FSTYPE=$(blkid -o value -s TYPE ${rootDevice} || true)
PARTTYPE=$(blkid -o value -s PTTYPE ${rootDevice} || true)
if test -z "$FSTYPE" -a -z "$PARTTYPE"; then
mke2fs -t ext4 ${rootDevice}
fi
'';
}
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