move all expressions to nix/; include modularized home-manager config

nixos/devices/default.nix

@@ -1,62 +0,0 @@
-{ 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}"
-  '';
-}