Features: Added Update functionality

dotfiles/.config/quickshell/config/SystemUpdates.qml

@@ -0,0 +1,72 @@
+pragma Singleton
+import QtQuick
+import Quickshell.Io
+
+// Shared state for SystemUpdate.qml, the bar's package-update indicator.
+// Bar.qml is instantiated once per screen (see shell.qml's Variants), so
+// without this being a singleton, plugging in extra monitors would mean
+// running `checkupdates` that many times in parallel on every poll — which
+// isn't just wasteful, it's actively unreliable: concurrent invocations
+// race over checkupdates' own sync directory and can intermittently report
+// 0 pending updates. One shared Process here means exactly one `checkupdates`
+// run at a time, and every bar's icon reflects the same result.
+QtObject {
+    id: root
+
+    // checkupdates syncs a throwaway copy of the pacman db, so it's not
+    // free to run often — matches the old waybar custom/updater module's
+    // ~21.7 minute poll interval (see .config/waybar/config).
+    readonly property int refreshIntervalMs: 1300 * 1000
+
+    property int updateCount: 0
+    property bool checking: false
+    property bool updating: false
+
+    function refresh() {
+        if (_checkProc.running) return
+        root.checking = true
+        _checkProc.running = true
+    }
+
+    // scriptPath: absolute path to update-system.sh (resolved by the caller
+    // via Quickshell.shellPath, which isn't available as a plain import
+    // here without pulling in the whole Quickshell singleton for one call).
+    function runUpdate(scriptPath) {
+        if (_updateProc.running) return
+        root.updating = true
+        _updateProc.command = [scriptPath]
+        _updateProc.running = true
+    }
+
+    // QtObject has no default property, so these are attached via property
+    // assignment rather than as plain child elements (same as Colors.qml's
+    // FileView).
+    readonly property Process _checkProc: Process {
+        command: ["sh", "-c", "checkupdates 2>/dev/null | wc -l"]
+        stdout: StdioCollector {
+            id: checkCollector
+            onStreamFinished: {
+                root.updateCount = parseInt(checkCollector.text.trim(), 10) || 0
+                root.checking = false
+            }
+        }
+    }
+
+    // Runs update-system.sh, which opens its own terminal and blocks until
+    // that terminal is closed — so this only exits once the user's actually
+    // done updating, which is exactly when a re-check matters.
+    readonly property Process _updateProc: Process {
+        onExited: {
+            root.updating = false
+            root.refresh()
+        }
+    }
+
+    readonly property Timer _timer: Timer {
+        interval: root.refreshIntervalMs
+        running: true
+        repeat: true
+        triggeredOnStart: true
+        onTriggered: root.refresh()
+    }
+}