notify/Notify/Program.cs

using System;
using System.Threading;
using Avalonia;
using Avalonia.Controls;
using Notify.Cli;
using Notify.Ipc;

namespace Notify;

internal static class Program
{
    // 保活期间持有，确保 Host 单例
    private static Mutex? _hostMutex;

    // Avalonia configuration, don't remove; also used by the visual designer.
    public static AppBuilder BuildAvaloniaApp() =>
        AppBuilder.Configure<App>()
            .UsePlatformDetect()
            .WithInterFont()
            .LogToTrace();

    [STAThread]
    public static int Main(string[] args)
    {
        var mode = args.Length > 0 ? args[0].ToLowerInvariant() : "host";

        // 钩子子命令：纯互操作 / IPC，不加载 Avalonia
        return mode switch
        {
            "save" => CliRunner.Save(),
            "notify" => CliRunner.Notify(),
            "input" => CliRunner.Input(),
            "cleanup" => CliRunner.Cleanup(),
            _ => RunHost(args),
        };
    }

    // 常驻 Host：加载 Avalonia，无主窗口保活，监听命名管道
    private static int RunHost(string[] args)
    {
        _hostMutex = new Mutex(true, IpcConstants.HostMutexName, out var created);
        if (!created)
        {
            // 已有 Host 在跑，本进程退出
            return 0;
        }

        BuildAvaloniaApp()
            // OnExplicitShutdown = 持续保活：没有主窗口也不会退出，只有显式 Shutdown 才结束
            .StartWithClassicDesktopLifetime(args, ShutdownMode.OnExplicitShutdown);
        return 0;
    }
}