liminix-fork/modules/outputs/ext4fs.nix
Daniel Barlow 80528376a2 move o.systemConfiguration to initramfs module
as far as I can tell, we define it identically in every module
that uses initramfs
2023-12-11 21:47:15 +00:00

38 lines
850 B
Nix

{
config
, pkgs
, lib
, ...
}:
let
inherit (lib) mkIf mkOption types;
o = config.system.outputs;
in
{
imports = [
./initramfs.nix
];
config = mkIf (config.rootfsType == "ext4") {
kernel.config = {
EXT4_FS = "y";
EXT4_USE_FOR_EXT2 = "y";
FS_ENCRYPTION = "y";
};
boot.initramfs.enable = true;
system.outputs = {
rootfs =
let
inherit (pkgs.pkgsBuildBuild) runCommand e2fsprogs;
in runCommand "mkfs.ext4" {
depsBuildBuild = [ e2fsprogs ];
} ''
tree=${o.bootablerootdir}
size=$(du -s --apparent-size --block-size 1024 $tree |cut -f1)
# add 25% for filesystem overhead
size=$(( 5 * $size / 4))
dd if=/dev/zero of=$out bs=1024 count=$size
mke2fs -t ext4 -j -d $tree $out
'';
};
};
}