Add CPU usage percentage

modules/hosts/t480/dwm/dwmblocks/cpu.nix

@@ -0,0 +1,17 @@
+{
+  flake.modules.homeManager.gui =
+    { pkgs, ... }:
+    {
+      home.packages = [
+        (pkgs.writeShellApplication {
+          name = "status-cpu";
+
+          runtimeInputs = with pkgs; [ sysstat ];
+
+          text = ''
+            mpstat | grep -A 5 "%idle" | tail -n 1 | awk -F " " '{printf "%s%% CPU", 100 -  $ 12}'
+          '';
+        })
+      ];
+    };
+}

modules/hosts/t480/dwm/dwmblocks/default.nix

@@ -14,6 +14,7 @@
 
               {"", "free -h | awk '/^Mem/ { printf \"%s/%s RAM\\n\", $3, $2 }' | sed 's/i//g'", 30, 0},
 
+              {"", "status-cpu", 10, 0},
 
               {"", "date '+%x %R'", 30, 0},
             };