103 lines
3.0 KiB
Nix
103 lines
3.0 KiB
Nix
{
|
|
config
|
|
, pkgs
|
|
, lib
|
|
, ...
|
|
}:
|
|
let
|
|
inherit (lib) mkEnableOption mkIf;
|
|
inherit (pkgs) runCommand callPackage writeText;
|
|
in
|
|
{
|
|
options = {
|
|
boot.initramfs = {
|
|
enable = mkEnableOption "enable initramfs";
|
|
default = false;
|
|
};
|
|
};
|
|
config = mkIf config.boot.initramfs.enable {
|
|
kernel.config.BLK_DEV_INITRD = "y";
|
|
kernel.config.INITRAMFS_SOURCE = builtins.toJSON "${config.outputs.initramfs}";
|
|
|
|
outputs = {
|
|
initramfs =
|
|
let
|
|
bb1 = pkgs.busybox.override {
|
|
enableStatic = true;
|
|
enableMinimal = true;
|
|
enableAppletSymlinks = false;
|
|
|
|
extraConfig = ''
|
|
CONFIG_DESKTOP n
|
|
CONFIG_ASH n
|
|
CONFIG_HUSH y
|
|
CONFIG_HUSH_TICK y
|
|
CONFIG_HUSH_LOOPS y
|
|
CONFIG_HUSH_CASE y
|
|
CONFIG_HUSH_ECHO y
|
|
CONFIG_HUSH_SET y
|
|
CONFIG_LN y
|
|
CONFIG_CAT y
|
|
CONFIG_MOUNT y
|
|
CONFIG_PRINTF y
|
|
CONFIG_FEATURE_MOUNT_FLAGS y
|
|
CONFIG_FEATURE_MOUNT_VERBOSE y
|
|
CONFIG_ECHO y
|
|
CONFIG_CHROOT y
|
|
CONFIG_CHMOD y
|
|
CONFIG_MKDIR y
|
|
CONFIG_MKNOD y
|
|
CONFIG_BASH_IS_NONE y
|
|
CONFIG_SH_IS_NONE y
|
|
CONFIG_SH_IS_ASH n
|
|
CONFIG_FEATURE_SH_STANDALONE y
|
|
CONFIG_FEATURE_PREFER_APPLETS y
|
|
CONFIG_BUSYBOX_EXEC_PATH "/bin/busybox"
|
|
'';
|
|
};
|
|
bb = bb1.overrideAttrs(o: {
|
|
makeFlags = [];
|
|
});
|
|
slashinit = pkgs.writeScript "init" ''
|
|
#!/bin/hush
|
|
exec >/dev/console
|
|
echo Running in initramfs
|
|
mount -t proc none /proc
|
|
set -- `cat /proc/cmdline`
|
|
for i in "$@" ; do
|
|
case "''${i}" in
|
|
root=*)
|
|
rootdevice="''${i#root=}"
|
|
;;
|
|
esac
|
|
done
|
|
echo mount -t jffs2 ''${rootdevice} /target/persist
|
|
mount -t jffs2 ''${rootdevice} /target/persist
|
|
mount -o bind /target/persist/nix /target/nix
|
|
hush /target/persist/activate /target
|
|
cd /target
|
|
mount -o bind /target /
|
|
exec chroot . /bin/init "$@"
|
|
'';
|
|
refs = pkgs.writeReferencesToFile bb;
|
|
gen_init_cpio = pkgs.pkgsBuildBuild.gen_init_cpio;
|
|
in runCommand "initramfs.cpio" {} ''
|
|
cat << SPECIALS | ${gen_init_cpio}/bin/gen_init_cpio /dev/stdin > $out
|
|
dir /proc 0755 0 0
|
|
dir /dev 0755 0 0
|
|
nod /dev/mtdblock0 0600 0 0 b 31 0
|
|
dir /target 0755 0 0
|
|
dir /target/persist 0755 0 0
|
|
dir /target/nix 0755 0 0
|
|
nod /dev/console 0600 0 0 c 5 1
|
|
dir /bin 0755 0 0
|
|
file /bin/busybox ${bb}/bin/busybox 0755 0 0
|
|
slink /bin/hush /bin/busybox 0755 0 0
|
|
slink /bin/chroot /bin/busybox 0755 0 0
|
|
file /init ${slashinit} 0755 0 0
|
|
SPECIALS
|
|
'';
|
|
};
|
|
};
|
|
}
|