nix_optimize: Add optimization of store and automatic GC call

hosts/nixos-test/configuration.nix

@@ -23,6 +23,10 @@
     };
   };
 
+  # Limit the number of generations to keep
+  # boot.loader.systemd-boot.configurationLimit = 10;
+  boot.loader.grub.configurationLimit = 10;
+
   networking.hostName = "nixos-vm"; # Define your hostname.
   users.users.florian.initialPassword = "test";
 

hosts/perso-desktop/configuration.nix

@@ -28,6 +28,10 @@
   };
   boot.loader.efi.canTouchEfiVariables = true;
 
+  # Limit the number of generations to keep
+  boot.loader.systemd-boot.configurationLimit = 10;
+  # boot.loader.grub.configurationLimit = 10;
+
   networking.hostName = "nixos-desktop-perso"; # Define your hostname.
 
   modules.system = {

hosts/perso-laptop/configuration.nix

@@ -17,6 +17,10 @@
   boot.loader.systemd-boot.enable = true;
   boot.loader.efi.canTouchEfiVariables = true;
 
+  # Limit the number of generations to keep
+  boot.loader.systemd-boot.configurationLimit = 10;
+  # boot.loader.grub.configurationLimit = 10;
+
   networking.hostName = "nixos-laptop-perso"; # Define your hostname.
 
   hardware.nvidia.prime = {

modules/system/common.nix

@@ -23,6 +23,20 @@
     LC_TIME = "fr_FR.UTF-8";
   };
 
+  # Perform garbage collection weekly to maintain low disk usage
+  nix.gc = {
+    automatic = true;
+    dates = "*-*-* 20:00:00";
+    options = "--delete-older-than 1w";
+  };
+
+  # Optimize storage
+  # You can also manually optimize the store via:
+  #    nix-store --optimise
+  # Refer to the following link for more details:
+  # https://nixos.org/manual/nix/stable/command-ref/conf-file.html#conf-auto-optimise-store
+  nix.settings.auto-optimise-store = true;
+
   nixpkgs.config.allowUnfree = true;
 
   services.udev.packages = [ pkgs.yubikey-personalization ];