make * composable; add install medium; archive prevoius code

nixos/devices/default.nix

@@ -0,0 +1,62 @@
+{ pkgs ? import <nixpkgs> {}
+, dir
+, rebuildarg ? null
+}:
+
+let
+  diskId = (import ((builtins.getEnv "PWD")+"/${dir}/hw.nix") {}).hardware.encryptedDisk.diskId;
+
+in {
+  rebuild = pkgs.writeScript "script" ''
+    #!/usr/bin/env bash
+    set -xe
+
+    pushd ${dir}
+    export NIXOS_CONFIG="$PWD"/configuration.nix
+    export INSTALL_ROOT="/mnt/$ID-root"
+
+    [[ -e "''${NIXOS_CONFIG}" ]]
+
+    nixos-rebuild -I nixos-config=''${NIXOS_CONFIG} ${rebuildarg}
+    rm result
+  '';
+
+  diskMount = pkgs.writeScript "script" ''
+    #!/usr/bin/env bash
+    set -xe
+    ID=${diskId}
+    echo Mounting $ID
+    set -xe
+    cryptsetup luksOpen /dev/disk/by-partlabel/$ID-part3 $ID-part3
+    vgchange -ay $ID
+    mkdir -p /mnt/$ID-root
+    mount /dev/$ID/root /mnt/$ID-root -o subvol=nixos
+    mount /dev/$ID/root /mnt/$ID-root/home -o subvol=home
+    mount /dev/disk/by-partlabel/$ID-part2 /mnt/$ID-root/boot
+  '';
+
+  diskUmount = pkgs.writeScript "script" ''
+    #!/usr/bin/env bash
+    set -xe
+      ID=${diskId}
+    umount -R /mnt/$ID-root
+    rmdir /mnt/$ID-root
+    vgchange -an $ID
+    cryptsetup luksClose $ID-part3
+    sync
+  '';
+
+  diskInstall = pkgs.writeScript "script" ''
+    #!/usr/bin/env bash
+    set -xe
+    ID=${diskId}
+    pushd ${dir}
+    export NIXOS_CONFIG="$PWD"/configuration.nix
+    export INSTALL_ROOT="/mnt/$ID-root"
+
+    [[ -e "''${NIXOS_CONFIG}" ]]
+    [[ -e "''${INSTALL_ROOT}" ]]
+
+    nixos-install --max-jobs 5 --cores 4  --no-channel-copy --no-root-passwd --root "''${INSTALL_ROOT}"
+  '';
+}