add memory

widget/Bar.tsx

@@ -8,6 +8,7 @@ import Pywal from "./Pywal";
 import Tray from "./Tray";
 import SwayNC from "./SwayNC";
 import WirePlumber from "./WirePlumber";
+import Memory from "./Memory";
 
 export default function Bar(gdkmonitor: Gdk.Monitor) {
   const { TOP, LEFT, RIGHT } = Astal.WindowAnchor;
@@ -34,6 +35,7 @@ export default function Bar(gdkmonitor: Gdk.Monitor) {
           <Pywal />
           <WirePlumber />
           <Internet />
+          <Memory />
           <Calendar />
           <SwayNC />
         </box>

widget/Memory.tsx

@@ -0,0 +1,18 @@
+import { bind, Variable } from "astal";
+
+const Memory = function () {
+  const usage = Variable(0).poll(
+    1000,
+    ["bash", "-c", "free -m | grep Mem | awk '{print ($3/$2)*100}'"],
+    (value) => Number(value),
+  );
+
+  return (
+    <label
+      cssClasses={["Label"]}
+      label={bind(usage).as((usage) => `  ${usage.toFixed()} %`)}
+    />
+  );
+};
+
+export default Memory;