~

hosts/hastur/hardware.nix

@@ -20,7 +20,8 @@
     };
     kernelModules = [ "ec_sys" "uhid" "kvm-amd" ];
     # extraModulePackages = with config.boot.kernelPackages; [ v4l2loopback ];
-    kernelPackages = pkgs.linuxPackages_latest;
+    kernelPackages =
+      pkgs.linuxPackages_latest;
     # inputs.nyx.packages.${pkgs.system}.linuxPackages_cachyos-lto-zen3;
     # binfmt.emulatedSystems = [
     #   "riscv64-linux"
@@ -105,6 +106,8 @@
   fileSystems."/persist".neededForBoot = true;
 
 
+  hardware.bluetooth.enable = true; # enables support for Bluetooth
+  hardware.bluetooth.powerOnBoot = true; # powers up the default Bluetooth controller on boot
   nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
   hardware.cpu.amd.updateMicrocode = lib.mkDefault config.hardware.enableRedistributableFirmware;
 }

modules/snapy.nix

@@ -0,0 +1,84 @@
+{ pkgs
+, config
+, lib
+, ...
+}:
+with lib;
+let
+  cfg = config.services.snapy;
+in
+{
+  options.services.snapy = {
+    instances = mkOption {
+      type = types.listOf (types.submodule {
+        options = {
+          name = mkOption { type = types.str; };
+          source = mkOption {
+            type = types.str;
+            default = "/persist";
+          };
+          calendar = mkOption {
+            type = types.str;
+            default = "*:0/3";
+          };
+          keep = mkOption {
+            type = types.str;
+            default = "3day";
+          };
+        };
+      });
+      default = [ ];
+    };
+  };
+  config =
+    mkIf (cfg.instances != [ ])
+      {
+
+        systemd.timers = lib.foldr
+          (s: acc: acc //
+            {
+              "snapy-${s.name}" = {
+                description = "snap task ${s.name}";
+                wantedBy = [ "timers.target" ];
+                timerConfig = {
+                  OnCalendar = s.calendar;
+                };
+              };
+            })
+          { }
+          cfg.instances;
+
+        systemd.services = lib.foldr
+          (s: acc: acc // {
+            "snapy-${s.name}" = {
+              wantedBy = [ "multi-user.target" ];
+              description = "${s.name} snapy daemon";
+              serviceConfig =
+                {
+                  # DynamicUser = true;
+                  User = "root";
+                  ExecStart =
+                    let btrfs = lib.getExe' pkgs.btrfs-progs "btrfs"; in
+                    toString (pkgs.lib.getExe (pkgs.nuenv.writeScriptBin
+                      {
+                        name = "snapy";
+                        script = ''
+                          # take snapshot
+                          date now | format date "%m-%d_%H:%M:%S" | ${btrfs} subvol snapshot -r ${s.source} $'${s.source}/.snapshots/($in)'
+
+                          date now
+                          # rm out-dated
+                          ls ${s.source}/.snapshots | filter { |i| ((date now) - $i.modified) > ${s.keep} } | each { |d| ${btrfs} sub del $d.name }
+                        '';
+                      }));
+
+                  # AmbientCapabilities = [ "CAP_SYS_ADMIN" "CAP_SYS_RESOURCE" "CAP_DAC_OVERRIDE" ];
+                  # CapabilityBoundingSet = [ "CAP_SYS_ADMIN" "CAP_SYS_RESOURCE" "CAP_DAC_OVERRIDE" ];
+                };
+            };
+          })
+          { }
+          cfg.instances;
+      }
+  ;
+}

overlays.nix

@@ -28,7 +28,7 @@ let system = "x86_64-linux"; in [
       #     }).lazygit;
       inherit ((import inputs.nixpkgs-master {
         inherit system; config.allowUnfree = true;
-      })) monaspace factorio-headless-experimental;
+      })) monaspace factorio-headless-experimental linuxPackages_latest;
       # inherit ((import inputs.nixpkgs-dae {
       #   inherit system; config.allowUnfree = true;
       # })) dae;

packages.nix

@@ -44,7 +44,7 @@ let
   e = with pkgs;{
     crypt = [ minisign rage age-plugin-yubikey cryptsetup tpm2-tss tpm2-tools yubikey-manager yubikey-manager-qt monero-cli ];
 
-    python = [ (python311.withPackages (ps: with ps; [ pandas requests absl-py tldextract ])) ];
+    python = [ (python311.withPackages (ps: with ps; [ pandas requests absl-py tldextract bleak dotenv ])) ];
 
     lang = [
       [