Use attic as nixos binary cache and update CI accordingly

common/binary-cache.nix

@@ -6,11 +6,11 @@
       substituters = [
         "https://cache.nixos.org/"
         "https://nix-community.cachix.org"
-        "http://s0.koi-bebop.ts.net:5000"
+        "http://s0.koi-bebop.ts.net:28338/nixos"
       ];
       trusted-public-keys = [
         "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs="
-        "s0.koi-bebop.ts.net:OjbzD86YjyJZpCp9RWaQKANaflcpKhtzBMNP8I2aPUU="
+        "nixos:IDhKojUaMz+UIiri1/DQk9EpqDokih8dwxmp41uJnls="
       ];
     };
   };

common/default.nix

@@ -63,6 +63,7 @@
     lf
     gnumake
     tree
+    attic
   ];
 
   nixpkgs.config.allowUnfree = true;

common/server/atticd.nix

@@ -0,0 +1,37 @@
+{ config, lib, ... }:
+
+let
+  cfg = config.services.atticd;
+in
+{
+  config = lib.mkIf cfg.enable {
+    services.atticd = {
+      credentialsFile = "/run/agenix/atticd-credentials";
+
+      settings = {
+        listen = "[::]:28338";
+
+        chunking = {
+          # Disable chunking for performance (I have plenty of space)
+          nar-size-threshold = 0;
+
+          # Chunking is disabled due to poor performance so these values don't matter but are required anyway.
+          # One day, when I move away from ZFS maybe this will perform well enough.
+          # nar-size-threshold = 64 * 1024; # 64 KiB
+          min-size = 16 * 1024; # 16 KiB
+          avg-size = 64 * 1024; # 64 KiB
+          max-size = 256 * 1024; # 256 KiB
+        };
+
+        # Disable compression for performance (I have plenty of space)
+        compression.type = "none";
+
+        garbage-collection = {
+          default-retention-period = "6 months";
+        };
+      };
+    };
+
+    age.secrets.atticd-credentials.file = ../../secrets/atticd-credentials.age;
+  };
+}

common/server/default.nix

@@ -22,5 +22,6 @@
     ./dashy.nix
     ./librechat.nix
     ./actualbudget.nix
+    ./atticd.nix
   ];
 }