home: nix: configure GC

Remove the secret, as it not used anymore.

This reverts commit 52413dcaf7.

flake.lock

@@ -136,11 +136,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1729551526,
+        "lastModified": 1729864948,
-        "narHash": "sha256-7LAGY32Xl14OVQp3y6M43/0AtHYYvV6pdyBcp3eoz0s=",
+        "narHash": "sha256-CeGSqbN6S8JmzYJX/HqZjr7dMGlvHLLnJJarwB45lPs=",
         "owner": "nix-community",
         "repo": "home-manager",
-        "rev": "5ec753a1fc4454df9285d8b3ec0809234defb975",
+        "rev": "0c0268a3c80d30b989d0aadbd65f38d4fa27a9a0",
         "type": "github"
       },
       "original": {
@@ -152,11 +152,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1729413321,
+        "lastModified": 1729665710,
-        "narHash": "sha256-I4tuhRpZFa6Fu6dcH9Dlo5LlH17peT79vx1y1SpeKt0=",
+        "narHash": "sha256-AlcmCXJZPIlO5dmFzV3V2XF6x/OpNWUV8Y/FMPGd8Z4=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "1997e4aa514312c1af7e2bda7fad1644e778ff26",
+        "rev": "2768c7d042a37de65bb1b5b3268fc987e534c49d",
         "type": "github"
       },
       "original": {
@@ -168,11 +168,11 @@
     },
     "nur": {
       "locked": {
-        "lastModified": 1729688743,
+        "lastModified": 1729868220,
-        "narHash": "sha256-Oe1PRxUAXSwRUcRIH+saPgMsIEEm7PfL81+M5IDCqvg=",
+        "narHash": "sha256-OxHE1U+FIIaQ50nZpt/VxLH0bokiqsEqAshehlHhOFs=",
         "owner": "nix-community",
         "repo": "NUR",
-        "rev": "2680c1d6af171ee32198c8f2f5dc07ce1d5bd2ea",
+        "rev": "70b30d23d33ca2acfb267430b08ddf82ff7116b2",
         "type": "github"
       },
       "original": {

hosts/nixos/porthos/secrets/matrix/sliding-sync-secret.age

@@ -1,8 +0,0 @@
-age-encryption.org/v1
--> ssh-ed25519 cKojmg xRtF3XVc7yPicAV/E4U7mn0itvD0h1BWBTjwunuoe2E
-OkB9sjGB3ulH4Feuyj3Ed0DBG4+mghW/Qpum9oXL/8c
--> ssh-ed25519 jPowng 1r8drqhz1yZdTq0Kvqya+ArU1C2fkN7Gg9LiWWfeUFg
-cjbxntVwHvqLaJpiKs/Y8ojeb6e3/cLFcsoeuoobfFg
---- B1qA2PylJBrdZxZtCzlU2kRPvxLM+IrXTvR+ERxVtTY
-"W9<57>Äbg¸©~Ì/áÕb4ãÕ†ú³ÜÔIÊ
-Û}ð
§ËÅË-³²ªNó±”ÑC7vWœbºØ?¦8=œÉwÆBÃUpJClï²OÈ™³œnOÁ\

hosts/nixos/porthos/secrets/secrets.nix

@@ -48,9 +48,6 @@ in
     owner = "matrix-synapse";
     publicKeys = all;
   };
-  "matrix/sliding-sync-secret.age" = {
-    publicKeys = all;
-  };
 
   "mealie/mail.age" = {
     publicKeys = all;

modules/home/nix/default.nix

@@ -22,6 +22,10 @@ in
   options.my.home.nix = with lib; {
     enable = my.mkDisableOption "nix configuration";
 
+    gc = {
+      enable = my.mkDisableOption "nix GC configuration";
+    };
+
     cache = {
       selfHosted = my.mkDisableOption "self-hosted cache";
     };
@@ -60,6 +64,22 @@ in
       };
     }
 
+    (lib.mkIf cfg.gc.enable {
+      nix.gc = {
+        automatic = true;
+
+        # Every week, with some wiggle room
+        frequency = "weekly";
+        randomizedDelaySec = "10min";
+
+        # Use a persistent timer for e.g: laptops
+        persistent = true;
+
+        # Delete old profiles automatically after 15 days
+        options = "--delete-older-than 15d";
+      };
+    })
+
     (lib.mkIf cfg.cache.selfHosted {
       nix = {
         settings = {

modules/nixos/system/nix/default.nix

@@ -22,6 +22,10 @@ in
   options.my.system.nix = with lib; {
     enable = my.mkDisableOption "nix configuration";
 
+    gc = {
+      enable = my.mkDisableOption "nix GC configuration";
+    };
+
     cache = {
       selfHosted = my.mkDisableOption "self-hosted cache";
     };
@@ -62,6 +66,22 @@ in
       };
     }
 
+    (lib.mkIf cfg.gc.enable {
+      nix.gc = {
+        automatic = true;
+
+        # Every week, with some wiggle room
+        dates = "weekly";
+        randomizedDelaySec = "10min";
+
+        # Use a persistent timer for e.g: laptops
+        persistent = true;
+
+        # Delete old profiles automatically after 15 days
+        options = "--delete-older-than 15d";
+      };
+    })
+
     (lib.mkIf cfg.cache.selfHosted {
       nix = {
         settings = {