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-rw-r--r--makefu/1systems/iso/justdoit.nix128
1 files changed, 128 insertions, 0 deletions
diff --git a/makefu/1systems/iso/justdoit.nix b/makefu/1systems/iso/justdoit.nix
new file mode 100644
index 000000000..7947953f9
--- /dev/null
+++ b/makefu/1systems/iso/justdoit.nix
@@ -0,0 +1,128 @@
+{ config, pkgs, lib, ... }:
+
+with lib;
+let
+ cfg = config.kexec.justdoit;
+ x = if cfg.nvme then "p" else "";
+in {
+ options = {
+ kexec.justdoit = {
+ rootDevice = mkOption {
+ type = types.str;
+ default = "/dev/sda";
+ description = "the root block device that justdoit will nuke from orbit and force nixos onto";
+ };
+ bootSize = mkOption {
+ type = types.int;
+ default = 256;
+ description = "size of /boot in mb";
+ };
+ bootType = mkOption {
+ type = types.enum [ "ext4" "vfat" "zfs" ];
+ default = "ext4";
+ };
+ swapSize = mkOption {
+ type = types.int;
+ default = 1024;
+ description = "size of swap in mb";
+ };
+ poolName = mkOption {
+ type = types.str;
+ default = "tank";
+ description = "zfs pool name";
+ };
+ luksEncrypt = mkOption {
+ type = types.bool;
+ default = false;
+ description = "encrypt all of zfs and swap";
+ };
+ uefi = mkOption {
+ type = types.bool;
+ default = false;
+ description = "create a uefi install";
+ };
+ nvme = mkOption {
+ type = types.bool;
+ default = false;
+ description = "rootDevice is nvme";
+ };
+ };
+ };
+ config = let
+ mkBootTable = {
+ ext4 = "mkfs.ext4 $NIXOS_BOOT -L NIXOS_BOOT";
+ vfat = "mkfs.vfat $NIXOS_BOOT -n NIXOS_BOOT";
+ zfs = "";
+ };
+ in lib.mkIf true {
+ system.build.justdoit = pkgs.writeScriptBin "justdoit" ''
+ #!${pkgs.stdenv.shell}
+ set -e
+ vgchange -a n
+ wipefs -a ${cfg.rootDevice}
+ dd if=/dev/zero of=${cfg.rootDevice} bs=512 count=10000
+ sfdisk ${cfg.rootDevice} <<EOF
+ label: gpt
+ device: ${cfg.rootDevice}
+ unit: sectors
+ ${lib.optionalString (cfg.bootType != "zfs") "1 : size=${toString (2048 * cfg.bootSize)}, type=0FC63DAF-8483-4772-8E79-3D69D8477DE4"}
+ ${lib.optionalString (! cfg.uefi) "4 : size=4096, type=21686148-6449-6E6F-744E-656564454649"}
+ 2 : size=${toString (2048 * cfg.swapSize)}, type=0657FD6D-A4AB-43C4-84E5-0933C84B4F4F
+ 3 : type=0FC63DAF-8483-4772-8E79-3D69D8477DE4
+ EOF
+ ${if cfg.luksEncrypt then ''
+ cryptsetup luksFormat ${cfg.rootDevice}${x}2
+ cryptsetup open --type luks ${cfg.rootDevice}${x}2 swap
+ cryptsetup luksFormat ${cfg.rootDevice}${x}3
+ cryptsetup open --type luks ${cfg.rootDevice}${x}3 root
+ export ROOT_DEVICE=/dev/mapper/root
+ export SWAP_DEVICE=/dev/mapper/swap
+ '' else ''
+ export ROOT_DEVICE=${cfg.rootDevice}${x}3
+ export SWAP_DEVICE=${cfg.rootDevice}${x}2
+ ''}
+ ${lib.optionalString (cfg.bootType != "zfs") "export NIXOS_BOOT=${cfg.rootDevice}${x}1"}
+ mkdir -p /mnt
+ ${mkBootTable.${cfg.bootType}}
+ mkswap $SWAP_DEVICE -L NIXOS_SWAP
+ zpool create -o ashift=12 -o altroot=/mnt ${cfg.poolName} $ROOT_DEVICE
+ zfs create -o mountpoint=legacy ${cfg.poolName}/root
+ zfs create -o mountpoint=legacy ${cfg.poolName}/home
+ zfs create -o mountpoint=legacy ${cfg.poolName}/nix
+ swapon $SWAP_DEVICE
+ mount -t zfs ${cfg.poolName}/root /mnt/
+ mkdir /mnt/{home,nix,boot}
+ mount -t zfs ${cfg.poolName}/home /mnt/home/
+ mount -t zfs ${cfg.poolName}/nix /mnt/nix/
+ ${lib.optionalString (cfg.bootType != "zfs") "mount $NIXOS_BOOT /mnt/boot/"}
+ nixos-generate-config --root /mnt/
+ hostId=$(echo $(head -c4 /dev/urandom | od -A none -t x4))
+ cp ${./target-config.nix} /mnt/etc/nixos/configuration.nix
+ cat > /mnt/etc/nixos/generated.nix <<EOF
+ { ... }:
+ {
+ ${if cfg.uefi then ''
+ boot.loader.grub.efiInstallAsRemovable = true;
+ boot.loader.grub.efiSupport = true;
+ boot.loader.grub.device = "nodev";
+ '' else ''
+ boot.loader.grub.device = "${cfg.rootDevice}";
+ ''}
+ networking.hostId = "$hostId"; # required for zfs use
+ ${lib.optionalString cfg.luksEncrypt ''
+ boot.initrd.luks.devices = [
+ { name = "swap"; device = "${cfg.rootDevice}${x}2"; preLVM = true; }
+ { name = "root"; device = "${cfg.rootDevice}${x}3"; preLVM = true; }
+ ];
+ ''}
+ }
+ EOF
+ nixos-install
+ umount /mnt/home /mnt/nix ${lib.optionalString (cfg.bootType != "zfs") "/mnt/boot"} /mnt
+ zpool export ${cfg.poolName}
+ swapoff $SWAP_DEVICE
+ '';
+ environment.systemPackages = [ config.system.build.justdoit ];
+ boot.supportedFilesystems = [ "zfs" ];
+ };
+}