67 lines
1.4 KiB
Nix
67 lines
1.4 KiB
Nix
# Requires boot.initrd.enable = true and boot.initrd.systemd.enable = true!
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{ config, lib, pkgs, ... }:
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with lib;
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let
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cfg = config.sydnix.impermanence;
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in {
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options = {
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sydnix.impermanence = {
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enable = mkOption {
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description = "Enable Impermanence";
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type = types.bool;
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default = false;
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};
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directories = mkOption {
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description = "";
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type = with types; listOf anything;
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default = [];
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};
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files = mkOption {
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description = "";
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type = with types; listOf anything;
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default = [];
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};
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};
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};
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config = mkIf cfg.enable {
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boot.initrd.systemd.initrdBin = with pkgs; [
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zfs
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];
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boot.initrd.systemd.services.erase-darlings = {
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description = "Rollback filesystem to a blank state on boot";
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wantedBy = [
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"initrd.target"
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];
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after = [
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# "zfs-import.service"
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"zfs-import-rpool.service"
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];
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before = [
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"sysroot.mount"
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];
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path = [ pkgs.zfs ];
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unitConfig.DefaultDependencies = "no";
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serviceConfig = {
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Type = "oneshot";
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RemainAfterExit = true;
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};
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script = /* bash */ ''
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zfs rollback -r rpool/local/root@blank \
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&& echo ">> >> rollback complete << <<"
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'';
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};
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environment.persistence."/persist" = {
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directories = cfg.directories;
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files = cfg.files;
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};
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};
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}
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