chore(deps): lock file maintenance

Flake lock file updates:

• Updated input 'nixpkgs':
    'github:nixos/nixpkgs/12bf09802d77264e441f48e25459c10c93eada2e' (2024-07-29)
  → 'github:nixos/nixpkgs/a633d89c6dc9a2a8aae11813a62d7c58b2c0cc51' (2024-08-03)
• Updated input 'nixpkgs-unstable':
    'github:nixos/nixpkgs/52ec9ac3b12395ad677e8b62106f0b98c1f8569d' (2024-07-28)
  → 'github:nixos/nixpkgs/d04953086551086b44b6f3c6b7eeb26294f207da' (2024-08-02)

flake.lock

@@ -41,11 +41,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1722087241,
-        "narHash": "sha256-2ShmEaFi0kJVOEEu5gmlykN5dwjWYWYUJmlRTvZQRpU=",
+        "lastModified": 1722987190,
+        "narHash": "sha256-68hmex5efCiM2aZlAAEcQgmFI4ZwWt8a80vOeB/5w3A=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "8c50662509100d53229d4be607f1a3a31157fa12",
+        "rev": "21cc704b5e918c5fbf4f9fff22b4ac2681706d90",
         "type": "github"
       },
       "original": {
@@ -57,11 +57,11 @@
     },
     "nixpkgs-unstable": {
       "locked": {
-        "lastModified": 1722062969,
-        "narHash": "sha256-QOS0ykELUmPbrrUGmegAUlpmUFznDQeR4q7rFhl8eQg=",
+        "lastModified": 1723175592,
+        "narHash": "sha256-M0xJ3FbDUc4fRZ84dPGx5VvgFsOzds77KiBMW/mMTnI=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "b73c2221a46c13557b1b3be9c2070cc42cf01eb3",
+        "rev": "5e0ca22929f3342b19569b21b2f3462f053e497b",
         "type": "github"
       },
       "original": {

home/mail/default.nix

@@ -28,7 +28,7 @@ let
       showSignature = "append";
     };
     aerc = {
-      enable = true;
+      enable = false;
       extraAccounts = {
         pgp-opportunistic-encrypt = true;
         pgp-autosign = true;
@@ -84,7 +84,7 @@ in {
 
   programs.password-store.enable = true;
   programs.aerc = {
-    enable = true;
+    enable = false;
     extraConfig = builtins.readFile ./aerc/aerc.conf;
     /* { */
       /* general = { */

machines/morpheus.nix

@@ -15,6 +15,7 @@ inputs.nixpkgs.lib.nixosSystem {
       nixpkgs.overlays = [ overlay-unstable ];
     })
     (import ./common.nix inputs)
+    (import ./morpheus/btrbk.nix inputs)
     (import ./dev.nix inputs)
     (import ./entertainment.nix inputs)
     (import ./office.nix inputs)

machines/morpheus/btrbk.nix

@@ -0,0 +1,69 @@
+{ ... }: {
+  services.btrbk = {
+    instances = {
+      /*
+      home = {
+        settings = {
+          snapshot_preserve = "24h 14d 4w 12m";
+          snapshot_preserve_min = "latest";
+
+          # don't auto cleanup target
+          target_preserve_min = "all";
+
+          volume."/" = {
+            snapshot_dir = ".btrbk";
+            subvolume = {
+              home = {
+                snapshot_create = "always";
+              };
+            };
+            target = "/run/media/me/backup/morpheus";
+          };
+        };
+      };
+      */
+
+      # local snapshots:
+      # - create hourly
+      # - keep hourly for 4 days and daily forever
+      home_local = {
+        onCalendar = "hourly";
+        settings = {
+          snapshot_preserve = "96h *d";
+          snapshot_preserve_min = "latest";
+          volume."/" = {
+            snapshot_dir = "/home/.btrbk";
+            subvolume.home = {
+              snapshot_create = "always";
+            };
+          };
+        };
+      };
+
+      # backup snapshots to backup drive
+      # - keep all hourly and the last 14 days of daily snapshots on the local disk
+      # - keep 14 daily, 8 weekly and all monthly snapshots on the backup drive
+      # - don't create new snapshots
+      # - TODO: trigger on mount
+      home_external = {
+        # disable systemd timer
+        onCalendar = null;
+        settings = {
+          snapshot_preserve = "*h 14d";
+          snapshot_preserve_min = "latest";
+
+          target_preserve = "14d 8w *m";
+          #target_preserve_min = "all";
+
+          volume."/" = {
+            snapshot_dir = "/home/.btrbk";
+            subvolume.home = {
+              snapshot_create = "no";
+            };
+            target = "/run/media/me/backup/morpheus";
+          };
+        };
+      };
+    };
+  };
+}