Update dependencies

vendor/tailscale.com/ipn/ipnlocal/autoupdate.go

@@ -0,0 +1,65 @@
+// Copyright (c) Tailscale Inc & AUTHORS
+// SPDX-License-Identifier: BSD-3-Clause
+
+//go:build linux || windows
+
+package ipnlocal
+
+import (
+	"context"
+	"time"
+
+	"tailscale.com/clientupdate"
+	"tailscale.com/ipn"
+	"tailscale.com/version"
+)
+
+func (b *LocalBackend) stopOfflineAutoUpdate() {
+	if b.offlineAutoUpdateCancel != nil {
+		b.logf("offline auto-update: stopping update checks")
+		b.offlineAutoUpdateCancel()
+		b.offlineAutoUpdateCancel = nil
+	}
+}
+
+func (b *LocalBackend) maybeStartOfflineAutoUpdate(prefs ipn.PrefsView) {
+	if !prefs.AutoUpdate().Apply.EqualBool(true) {
+		return
+	}
+	// AutoUpdate.Apply field in prefs can only be true for platforms that
+	// support auto-updates. But check it here again, just in case.
+	if !clientupdate.CanAutoUpdate() {
+		return
+	}
+	// On macsys, auto-updates are managed by Sparkle.
+	if version.IsMacSysExt() {
+		return
+	}
+
+	if b.offlineAutoUpdateCancel != nil {
+		// Already running.
+		return
+	}
+	ctx, cancel := context.WithCancel(context.Background())
+	b.offlineAutoUpdateCancel = cancel
+
+	b.logf("offline auto-update: starting update checks")
+	go b.offlineAutoUpdate(ctx)
+}
+
+const offlineAutoUpdateCheckPeriod = time.Hour
+
+func (b *LocalBackend) offlineAutoUpdate(ctx context.Context) {
+	t := time.NewTicker(offlineAutoUpdateCheckPeriod)
+	defer t.Stop()
+	for {
+		select {
+		case <-ctx.Done():
+			return
+		case <-t.C:
+		}
+		if err := b.startAutoUpdate("offline auto-update"); err != nil {
+			b.logf("offline auto-update: failed: %v", err)
+		}
+	}
+}