Do not use Tmds.DBus in trimmed apps

Author: bastianeicher

src/Common/Guards.cs

@@ -0,0 +1,28 @@
+// Copyright Bastian Eicher
+// Licensed under the MIT License
+
+namespace NanoByte.Common;
+
+/// <summary>
+/// Guards that can be statically evaluated by a linker.
+/// </summary>
+internal class Guards
+{
+#if NET9_0_OR_GREATER
+    // This feature is disabled by default in trimmed apps:
+    // https://learn.microsoft.com/en-us/dotnet/core/deploying/trimming/trimming-options#framework-features-disabled-when-trimming
+    private const string NotTrimmedSwitch = "System.Resources.ResourceManager.AllowCustomResourceTypes";
+
+    /// <summary>
+    /// The current app is likely to be not trimmed and therefore supports full reflection.
+    /// </summary>
+    [FeatureGuard(typeof(RequiresUnreferencedCodeAttribute))]
+    [FeatureSwitchDefinition(NotTrimmedSwitch)]
+    public static bool NotTrimmed { get; } = AppContext.TryGetSwitch(NotTrimmedSwitch, out bool value) ? value : true;
+#else
+    /// <summary>
+    /// Always returns true.
+    /// </summary>
+    public static bool NotTrimmed => true;
+#endif
+}

src/Common/Native/OSUtils.cs

@@ -107,7 +107,7 @@ public static string ExpandVariables(string value, StringDictionary variables)
             if (WindowsUtils.IsWindowsNT) return KeepAwakeWindows(NativeMethods.ExecutionState.SystemRequired);
 
 #if NET
-            if (UnixUtils.IsLinux)
+            if (UnixUtils.IsLinux && Guards.NotTrimmed)
             {
                 var login = Connection.System.CreateProxy<IManager>("org.freedesktop.login1", "/org/freedesktop/login1");
                 return login.InhibitAsync("idle", AppInfo.Current.Name ?? "App", reason, "block").Result;
@@ -137,7 +137,7 @@ public static string ExpandVariables(string value, StringDictionary variables)
             if (WindowsUtils.IsWindowsNT) return KeepAwakeWindows(NativeMethods.ExecutionState.DisplayRequired);
 
 #if NET
-            if (UnixUtils.IsLinux)
+            if (UnixUtils.IsLinux && Guards.NotTrimmed)
             {
                 var screenSaver = Connection.Session.CreateProxy<IScreenSaver>("org.freedesktop.ScreenSaver", "/org/freedesktop/ScreenSaver");
                 uint cookie = screenSaver.InhibitAsync(AppInfo.Current.Name ?? "App", reason).Result;

src/Common/Net/NetUtils.cs

@@ -145,7 +145,7 @@ public static Connectivity GetInternetConnectivity()
                 return SafeNativeMethods.InternetGetConnectedState(out _, 0) ? Connectivity.Normal : Connectivity.None;
 
 #if NET
-            if (UnixUtils.IsLinux)
+            if (UnixUtils.IsLinux && Guards.NotTrimmed)
             {
                 var networkManager = Connection.System.CreateProxy<INetworkManager>("org.freedesktop.NetworkManager", "/org/freedesktop/NetworkManager");
                 if (networkManager.GetAsync<uint>("Connectivity").Result is INetworkManager.ConnectivityNone or INetworkManager.ConnectivityPortal)