create new service and tag generations

hosts/nas/boot.nix

@@ -1,6 +1,6 @@
 { pkgs, ... }:
 let
-  configLimit = 5;
+  configLimit = 50;
   kernel = pkgs.linuxPackages_latest;
 in
 {

hosts/nas/configuration.nix

@@ -91,6 +91,7 @@ in
       efibootmgr
       ffmpeg
       gcc
+      git
       glances
       gparted
       htop

hosts/nas/services.nix

@@ -274,6 +274,56 @@ in
   };
 
   systemd.services = {
+    system-update-check = {
+      description = "Check for system configuration updates";
+
+      # Required packages for the service
+      path = with pkgs; [
+        git
+        nixos-rebuild
+        openssh
+      ];
+
+      # Service configuration
+      serviceConfig = {
+        Type = "oneshot";
+        User = "root";
+        WorkingDirectory = "/etc/nixos"; # Adjust this path to your config location
+      };
+
+      # The script that runs to check for updates
+      script = ''
+        # Store the current commit hash
+        OLD_HASH=$(git rev-parse HEAD)
+
+        # Fetch updates from remote
+        git fetch origin main  # Adjust branch name if needed
+
+        # Get the new commit hash
+        NEW_HASH=$(git rev-parse origin/main)
+
+        # If there are changes, pull and rebuild
+        if [ "$OLD_HASH" != "$NEW_HASH" ]; then
+          echo "Updates found, pulling changes..."
+          git pull origin main
+
+          # Get commit message and timestamp for the tag
+          COMMIT_MSG=$(git log -1 --pretty=%B | head -n1 | tr -dc '[:alnum:][:space:]-' | tr '[:space:]' '-')
+          TIMESTAMP=$(date +%Y%m%d-%H%M)
+          SHORT_HASH=$(git rev-parse --short HEAD)
+          
+          # Create a profile name using the timestamp, short hash, and commit message
+          PROFILE_NAME="$TIMESTAMP-$SHORT_HASH-$COMMIT_MSG"
+          
+          # Rebuild the system
+          nixos-rebuild boot --profile-name "$PROFILE_NAME"
+
+          echo "System rebuilt with profile: $PROFILE_NAME"
+        else
+          echo "No updates found"
+        fi
+      '';
+    };
 
     rsync-ssd = {
       path = [
@@ -296,4 +346,17 @@ in
       wantedBy = [ "multi-user.target" ];
     };
   };
+
+  # Create a timer to run the service periodically
+  systemd.timers.system-update-check = {
+    description = "Timer for system configuration updates";
+    wantedBy = [ "timers.target" ];
+    
+    # Timer configuration
+    timerConfig = {
+      OnCalendar = "daily";  # Check every day
+      Persistent = true;      # Run immediately if last run was missed
+      Unit = "system-update-check.service";
+    };
+  };
 }