feat: node updates by restart, auto by default; Podman Quadlet install from the panel alongside compose [CI]

backend/fleet/src/Fleet.Hosting/RestartController.cs

@@ -8,7 +8,9 @@ public sealed class RestartController : IDisposable
     private readonly RestartSchedule? _local;
     private readonly object _gate = new();
     private RestartSchedule? _remote;
+    private readonly CancellationTokenSource _now = new();
     private CancellationTokenSource _changed = new();
+    private string? _nowReason;
 
     public RestartController(RestartSchedule? local = null)
     {
@@ -41,6 +43,32 @@ public sealed class RestartController : IDisposable
         }
     }
 
+    /// <summary>应用要求现在就有序退出（比如管理员请求更新）；退出的原因，没有就是 null。</summary>
+    public string? NowReason
+    {
+        get
+        {
+            lock (_gate)
+            {
+                return _nowReason;
+            }
+        }
+    }
+
+    /// <summary>应用要求现在就退出的令牌。</summary>
+    public CancellationToken NowToken => _now.Token;
+
+    /// <summary>要求进程现在就有序退出，由服务管理器拉起；不管有没有设置定时重启。</summary>
+    public void RequestNow(string reason)
+    {
+        lock (_gate)
+        {
+            _nowReason ??= reason;
+        }
+
+        _now.Cancel();
+    }
+
     /// <summary>面板下发的设置；为空表示面板关闭了定时重启。返回 false 表示文本不合法（节点忽略它）。</summary>
     public bool SetRemote(string? text)
     {
@@ -68,6 +96,7 @@ public sealed class RestartController : IDisposable
         lock (_gate)
         {
             _changed.Dispose();
+            _now.Dispose();
         }
     }
 }