82 lines
2.2 KiB
Nix
82 lines
2.2 KiB
Nix
{ lib, config, ... }:
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with lib;
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let
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cfg = config.modules.impermanence;
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in
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{
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options.modules.impermanence = {
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enable = mkEnableOption "Impermanence";
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directories = mkOption {
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type = types.listOf types.str;
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default = [ ];
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description = ''
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Directories that should be stored in persistent storage.
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'';
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};
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files = mkOption {
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type = types.listOf types.str;
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default = [ ];
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description = ''
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Files that should be stored in persistent storage.
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'';
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};
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resetScript = mkOption {
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type = types.lines;
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description = ''
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Script to run in order to reset the system to a clean state.
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'';
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};
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};
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config = mkIf cfg.enable {
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# Filesystem setup
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fileSystems."/persist".neededForBoot = true;
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# boot.initrd.postResumeCommands = mkAfter cfg.resetScript;
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# TODO: Reduce dependency on the root filesystem being ZFS?
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boot.initrd.systemd.services.impermanence-rollback = {
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description = "Rollback filesystem to clean state.";
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wantedBy = [ "initrd.target" ];
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after = [ "zfs-import.target" ];
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before = [ "sysroot.mount" ];
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unitConfig.DefaultDependencies = "no";
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serviceConfig.Type = "oneshot";
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script = cfg.resetScript;
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};
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# For home-manager persistence
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programs.fuse.userAllowOther = true;
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# For testing purposes with VM
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virtualisation.vmVariantWithDisko.virtualisation.fileSystems."/persist".neededForBoot = true;
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environment.persistence = {
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"/persist/system" = {
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enable = true;
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hideMounts = true;
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directories = cfg.directories;
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files = cfg.files;
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};
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# "/persist/home" = {
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# enable = true;
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# hideMounts = true;
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# users = (
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# lib.mapAttrs' (
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# name: value:
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# let
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# user = name;
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# homeDir = "/home/${user}";
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# impConfig = value.modules.impermanence;
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# in
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# lib.nameValuePair user {
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# home = homeDir;
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# directories = impConfig.directories;
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# files = impConfig.files;
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# }
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# ) config.home-manager.users
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# );
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# };
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};
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};
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}
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