update script

hosts/default.nix

@@ -1,6 +1,25 @@
 { lib, pkgs, ... }:
 let
   timezone = "America/Chicago";
+
+  update-script = pkgs.writeScriptBin "update-system" ''
+    #!/usr/bin/env bash
+
+    cd /etc/nixos
+
+    # 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
+    sudo nixos-rebuild boot --profile-name "$PROFILE_NAME"
+
+    echo "System rebuilt with profile: $PROFILE_NAME"
+  '';
 in
 {
   imports = [
@@ -108,6 +127,7 @@ in
   };
 
   environment.systemPackages = with pkgs; [
+    update-script
     nixd
     pinentry-curses
   ];