feature: simple self-update implementation (#29)

src/SourceGit/App.JsonCodeGen.cs

@@ -0,0 +1,9 @@
+using System.Text.Json.Serialization;
+
+namespace SourceGit
+{
+    [JsonSourceGenerationOptions(WriteIndented = true, IgnoreReadOnlyFields = true, IgnoreReadOnlyProperties = true)]
+    [JsonSerializable(typeof(Models.Version))]
+    [JsonSerializable(typeof(ViewModels.Preference))]
+    internal partial class JsonCodeGen : JsonSerializerContext { }
+}

src/SourceGit/App.axaml.cs

@@ -2,8 +2,11 @@ using System;
 using System.Collections;
 using System.Globalization;
 using System.IO;
+using System.Net.Http;
 using System.Reflection;
 using System.Text;
+using System.Text.Json;
+using System.Threading.Tasks;
 
 using Avalonia;
 using Avalonia.Controls;
@@ -13,6 +16,7 @@ using Avalonia.Markup.Xaml;
 using Avalonia.Media;
 using Avalonia.Media.Fonts;
 using Avalonia.Styling;
+using Avalonia.Threading;
 
 namespace SourceGit
 {
@@ -162,6 +166,43 @@ namespace SourceGit
             return null;
         }
 
+        public static void Check4Update(bool manually = false)
+        {
+            Task.Run(async () =>
+            {
+                try
+                {
+                    // Fetch lastest release information.
+                    var client = new HttpClient() { Timeout = TimeSpan.FromSeconds(2) };
+                    var data = await client.GetStringAsync("https://api.github.com/repos/sourcegit-scm/sourcegit/releases/latest");
+
+                    // Parse json into Models.Version.
+                    var ver = JsonSerializer.Deserialize(data, JsonCodeGen.Default.Version);
+                    if (ver == null) return;
+
+                    // Check if already up-to-date.
+                    if (!ver.IsNewVersion)
+                    {
+                        if (manually) ShowSelfUpdateResult(new Models.AlreadyUpToDate());
+                        return;
+                    }
+
+                    // Should not check ignored tag if this is called manually.
+                    if (!manually)
+                    {
+                        var pref = ViewModels.Preference.Instance;
+                        if (ver.TagName == pref.IgnoreUpdateTag) return;
+                    }
+
+                    ShowSelfUpdateResult(ver);
+                }
+                catch (Exception e)
+                {
+                    if (manually) ShowSelfUpdateResult(e);
+                }
+            });
+        }
+
         public static void Quit()
         {
             if (Current.ApplicationLifetime is IClassicDesktopStyleApplicationLifetime desktop)
@@ -190,11 +231,32 @@ namespace SourceGit
                 var launcher = new Views.Launcher();
                 _notificationReceiver = launcher;
                 desktop.MainWindow = launcher;
+
+                if (ViewModels.Preference.Instance.Check4UpdatesOnStartup) Check4Update();
             }
 
             base.OnFrameworkInitializationCompleted();
         }
 
+        private static void ShowSelfUpdateResult(object data)
+        {
+            Dispatcher.UIThread.Post(() =>
+            {
+                if (Current.ApplicationLifetime is IClassicDesktopStyleApplicationLifetime desktop)
+                {
+                    var dialog = new Views.SelfUpdate()
+                    {
+                        DataContext = new ViewModels.SelfUpdate
+                        {
+                            Data = data
+                        }
+                    };
+
+                    dialog.Show(desktop.MainWindow);
+                }                
+            });
+        }
+
         private ResourceDictionary _activeLocale = null;
         private Models.INotificationReceiver _notificationReceiver = null;
     }

src/SourceGit/Models/Version.cs

@@ -0,0 +1,37 @@
+using System.Reflection;
+using System.Text.Json.Serialization;
+using System.Text.RegularExpressions;
+
+namespace SourceGit.Models
+{
+    public partial class Version
+    {
+        [JsonPropertyName("name")]
+        public string Name { get; set; }
+
+        [JsonPropertyName("tag_name")]
+        public string TagName { get; set; }
+
+        [JsonPropertyName("body")]
+        public string Body { get; set; }
+
+        [GeneratedRegex(@"^v(\d+)\.(\d+)$")]
+        private static partial Regex REG_VERSION_TAG();
+
+        public bool IsNewVersion
+        {
+            get
+            {
+                var match = REG_VERSION_TAG().Match(TagName);
+                if (!match.Success) return false;
+
+                var major = int.Parse(match.Groups[1].Value);
+                var minor = int.Parse(match.Groups[2].Value);
+                var ver = Assembly.GetExecutingAssembly().GetName().Version;
+                return ver.Major < major || (ver.Major == major && ver.Minor < minor);
+            }
+        }
+    }
+
+    public class AlreadyUpToDate { }
+}

src/SourceGit/Resources/Icons.axaml

@@ -86,4 +86,5 @@
   <StreamGeometry x:Key="Icons.LayoutHorizontal">M875 117H149C109 117 75 151 75 192v640c0 41 34 75 75 75h725c41 0 75-34 75-75V192c0-41-34-75-75-75zM139 832V192c0-6 4-11 11-11h331v661H149c-6 0-11-4-11-11zm747 0c0 6-4 11-11 11H544v-661H875c6 0 11 4 11 11v640z</StreamGeometry>
   <StreamGeometry x:Key="Icons.LayoutVertical">M875 117H149C109 117 75 151 75 192v640c0 41 34 75 75 75h725c41 0 75-34 75-75V192c0-41-34-75-75-75zm-725 64h725c6 0 11 4 11 11v288h-747V192c0-6 4-11 11-11zm725 661H149c-6 0-11-4-11-11V544h747V832c0 6-4 11-11 11z</StreamGeometry>
   <StreamGeometry x:Key="Icons.SyntaxHighlight">M875 128h-725A107 107 0 0043 235v555A107 107 0 00149 896h725a107 107 0 00107-107v-555A107 107 0 00875 128zm-115 640h-183v-58l25-3c15 0 19-8 14-24l-22-61H419l-28 82 39 2V768h-166v-58l18-3c18-2 22-11 26-24l125-363-40-4V256h168l160 448 39 3zM506 340l-72 218h145l-71-218h-2z</StreamGeometry>
+  <StreamGeometry x:Key="Icons.SoftwareUpdate">M900 287c40 69 60 144 60 225s-20 156-60 225c-40 69-94 123-163 163-69 40-144 60-225 60s-156-20-225-60c-69-40-123-94-163-163C84 668 64 593 64 512s20-156 60-225 94-123 163-163c69-40 144-60 225-60s156 20 225 60 123 94 163 163zM762 512c0-9-3-16-9-22L578 315l-44-44c-6-6-13-9-22-9s-16 3-22 9l-44 44-176 176c-6 6-9 13-9 22s3 16 9 22l44 44c6 6 13 9 22 9s16-3 22-9l92-92v269c0 9 3 16 9 22 6 6 13 9 22 9h62c8 0 16-3 22-9 6-6 9-13 9-22V486l92 92c6 6 13 9 22 9 8 0 16-3 22-9l44-44c6-6 9-13 9-22z</StreamGeometry>
 </ResourceDictionary>

src/SourceGit/Resources/Locales.Designer.cs

@@ -2301,6 +2301,15 @@ namespace SourceGit.Resources {
             }
         }
         
+        /// <summary>
+        ///   Looks up a localized string similar to Check for updates on startup.
+        /// </summary>
+        public static string Text_Preference_General_Check4UpdatesOnStartup {
+            get {
+                return ResourceManager.GetString("Text.Preference.General.Check4UpdatesOnStartup", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   Looks up a localized string similar to Language.
         /// </summary>
@@ -3255,6 +3264,69 @@ namespace SourceGit.Resources {
             }
         }
         
+        /// <summary>
+        ///   Looks up a localized string similar to Check for Updates ....
+        /// </summary>
+        public static string Text_SelfUpdate {
+            get {
+                return ResourceManager.GetString("Text.SelfUpdate", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized string similar to New version of this software is available: .
+        /// </summary>
+        public static string Text_SelfUpdate_Available {
+            get {
+                return ResourceManager.GetString("Text.SelfUpdate.Available", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized string similar to Check for updates failed!.
+        /// </summary>
+        public static string Text_SelfUpdate_Error {
+            get {
+                return ResourceManager.GetString("Text.SelfUpdate.Error", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized string similar to Download.
+        /// </summary>
+        public static string Text_SelfUpdate_GotoDownload {
+            get {
+                return ResourceManager.GetString("Text.SelfUpdate.GotoDownload", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized string similar to Skip This Version.
+        /// </summary>
+        public static string Text_SelfUpdate_IgnoreThisVersion {
+            get {
+                return ResourceManager.GetString("Text.SelfUpdate.IgnoreThisVersion", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized string similar to Software Update.
+        /// </summary>
+        public static string Text_SelfUpdate_Title {
+            get {
+                return ResourceManager.GetString("Text.SelfUpdate.Title", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized string similar to There are currently no updates available..
+        /// </summary>
+        public static string Text_SelfUpdate_UpToDate {
+            get {
+                return ResourceManager.GetString("Text.SelfUpdate.UpToDate", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   Looks up a localized string similar to Squash HEAD Into Parent.
         /// </summary>

src/SourceGit/Resources/Locales.en.resx

@@ -1302,4 +1302,28 @@
   <data name="Text.Preference.Appearance" xml:space="preserve">
     <value>APPEARANCE</value>
   </data>
+  <data name="Text.SelfUpdate.Title" xml:space="preserve">
+    <value>Software Update</value>
+  </data>
+  <data name="Text.SelfUpdate.Error" xml:space="preserve">
+    <value>Check for updates failed!</value>
+  </data>
+  <data name="Text.SelfUpdate.Available" xml:space="preserve">
+    <value>New version of this software is available: </value>
+  </data>
+  <data name="Text.SelfUpdate.GotoDownload" xml:space="preserve">
+    <value>Download</value>
+  </data>
+  <data name="Text.SelfUpdate.IgnoreThisVersion" xml:space="preserve">
+    <value>Skip This Version</value>
+  </data>
+  <data name="Text.SelfUpdate" xml:space="preserve">
+    <value>Check for Updates ...</value>
+  </data>
+  <data name="Text.SelfUpdate.UpToDate" xml:space="preserve">
+    <value>There are currently no updates available.</value>
+  </data>
+  <data name="Text.Preference.General.Check4UpdatesOnStartup" xml:space="preserve">
+    <value>Check for updates on startup</value>
+  </data>
 </root>

src/SourceGit/Resources/Locales.resx

@@ -1302,4 +1302,28 @@
   <data name="Text.Preference.Appearance" xml:space="preserve">
     <value>Appearance</value>
   </data>
+  <data name="Text.SelfUpdate.Title" xml:space="preserve">
+    <value>Software Update</value>
+  </data>
+  <data name="Text.SelfUpdate.Error" xml:space="preserve">
+    <value>Check for updates failed!</value>
+  </data>
+  <data name="Text.SelfUpdate.Available" xml:space="preserve">
+    <value>New version of this software is available: </value>
+  </data>
+  <data name="Text.SelfUpdate.GotoDownload" xml:space="preserve">
+    <value>Download</value>
+  </data>
+  <data name="Text.SelfUpdate.IgnoreThisVersion" xml:space="preserve">
+    <value>Skip This Version</value>
+  </data>
+  <data name="Text.SelfUpdate" xml:space="preserve">
+    <value>Check for Updates ...</value>
+  </data>
+  <data name="Text.SelfUpdate.UpToDate" xml:space="preserve">
+    <value>There are currently no updates available.</value>
+  </data>
+  <data name="Text.Preference.General.Check4UpdatesOnStartup" xml:space="preserve">
+    <value>Check for updates on startup</value>
+  </data>
 </root>

src/SourceGit/Resources/Locales.zh.resx

@@ -1302,4 +1302,28 @@
   <data name="Text.Preference.Appearance" xml:space="preserve">
     <value>外观配置</value>
   </data>
+  <data name="Text.SelfUpdate.Title" xml:space="preserve">
+    <value>软件更新</value>
+  </data>
+  <data name="Text.SelfUpdate.Error" xml:space="preserve">
+    <value>获取最新版本信息失败！</value>
+  </data>
+  <data name="Text.SelfUpdate.Available" xml:space="preserve">
+    <value>检测到软件有版本更新: </value>
+  </data>
+  <data name="Text.SelfUpdate.GotoDownload" xml:space="preserve">
+    <value>下    载</value>
+  </data>
+  <data name="Text.SelfUpdate.IgnoreThisVersion" xml:space="preserve">
+    <value>忽略此版本</value>
+  </data>
+  <data name="Text.SelfUpdate" xml:space="preserve">
+    <value>检测更新...</value>
+  </data>
+  <data name="Text.SelfUpdate.UpToDate" xml:space="preserve">
+    <value>当前已是最新版本。</value>
+  </data>
+  <data name="Text.Preference.General.Check4UpdatesOnStartup" xml:space="preserve">
+    <value>启动时检测软件更新</value>
+  </data>
 </root>

src/SourceGit/ViewModels/Preference.cs

@@ -28,7 +28,7 @@ namespace SourceGit.ViewModels
                     {
                         try
                         {
-                            _instance = JsonSerializer.Deserialize(File.ReadAllText(_savePath), JsonSerializationCodeGen.Default.Preference);
+                            _instance = JsonSerializer.Deserialize(File.ReadAllText(_savePath), JsonCodeGen.Default.Preference);
                         }
                         catch
                         {
@@ -133,6 +133,18 @@ namespace SourceGit.ViewModels
             set => SetProperty(ref _useFixedTabWidth, value);
         }
 
+        public bool Check4UpdatesOnStartup
+        {
+            get => _check4UpdatesOnStartup;
+            set => SetProperty(ref _check4UpdatesOnStartup, value);
+        }
+
+        public string IgnoreUpdateTag
+        {
+            get;
+            set;
+        } = string.Empty;
+
         public bool UseTwoColumnsLayoutInHistories
         {
             get => _useTwoColumnsLayoutInHistories;
@@ -342,7 +354,7 @@ namespace SourceGit.ViewModels
             var dir = Path.GetDirectoryName(_savePath);
             if (!Directory.Exists(dir)) Directory.CreateDirectory(dir);
 
-            var data = JsonSerializer.Serialize(_instance, JsonSerializationCodeGen.Default.Preference);
+            var data = JsonSerializer.Serialize(_instance, JsonCodeGen.Default.Preference);
             File.WriteAllText(_savePath, data);
         }
 
@@ -390,6 +402,7 @@ namespace SourceGit.ViewModels
         private int _maxHistoryCommits = 20000;
         private bool _restoreTabs = false;
         private bool _useFixedTabWidth = true;
+        private bool _check4UpdatesOnStartup = true;
         private bool _useTwoColumnsLayoutInHistories = false;
         private bool _useSideBySideDiff = false;
         private bool _useSyntaxHighlighting = false;
@@ -421,8 +434,4 @@ namespace SourceGit.ViewModels
             writer.WriteStringValue(value.ToString());
         }
     }
-
-    [JsonSourceGenerationOptions(WriteIndented = true, IgnoreReadOnlyFields = true, IgnoreReadOnlyProperties = true)]
-    [JsonSerializable(typeof(Preference))]
-    internal partial class JsonSerializationCodeGen : JsonSerializerContext { }
 }

src/SourceGit/ViewModels/SelfUpdate.cs

@@ -0,0 +1,15 @@
+using CommunityToolkit.Mvvm.ComponentModel;
+
+namespace SourceGit.ViewModels
+{
+    public class SelfUpdate : ObservableObject
+    {
+        public object Data
+        {
+            get => _data;
+            set => SetProperty(ref _data, value);
+        }
+
+        private object _data = null;
+    }
+}

src/SourceGit/Views/Launcher.axaml

@@ -65,6 +65,13 @@
                 <Path Width="14" Height="14" Data="{StaticResource Icons.Hotkeys}"/>
               </MenuItem.Icon>
             </MenuItem>
+            <MenuItem Header="-"/>
+            <MenuItem Header="{DynamicResource Text.SelfUpdate}" Click="Check4Update">
+              <MenuItem.Icon>
+                <Path Width="14" Height="14" Data="{StaticResource Icons.SoftwareUpdate}"/>
+              </MenuItem.Icon>
+            </MenuItem>
+            <MenuItem Header="-"/>
             <MenuItem Header="{DynamicResource Text.About}" Click="OpenAboutDialog">
               <MenuItem.Icon>
                 <Path Width="14" Height="14" Data="{StaticResource Icons.Info}"/>

src/SourceGit/Views/Launcher.axaml.cs

@@ -317,6 +317,12 @@ namespace SourceGit.Views
             e.Handled = true;
         }
 
+        private void Check4Update(object sender, RoutedEventArgs e)
+        {
+            App.Check4Update(true);
+            e.Handled = true;
+        }
+
         private async void OpenAboutDialog(object sender, RoutedEventArgs e)
         {
             var dialog = new About();

src/SourceGit/Views/Preference.axaml

@@ -67,7 +67,7 @@
           <TabItem.Header>
             <TextBlock Classes="tab_header" Text="{DynamicResource Text.Preference.General}"/>
           </TabItem.Header>
-          <Grid Margin="8" RowDefinitions="32,32,32,32,32" ColumnDefinitions="Auto,*">
+          <Grid Margin="8" RowDefinitions="32,32,32,32,32,32" ColumnDefinitions="Auto,*">
             <TextBlock Grid.Row="0" Grid.Column="0"
                        Text="{DynamicResource Text.Preference.General.Locale}"
                        HorizontalAlignment="Right"
@@ -131,6 +131,11 @@
                       Height="32"
                       Content="{DynamicResource Text.Preference.General.UseFixedTabWidth}"
                       IsChecked="{Binding Source={x:Static vm:Preference.Instance}, Path=UseFixedTabWidth, Mode=TwoWay}"/>
+
+            <CheckBox Grid.Row="5" Grid.Column="1"
+                      Height="32"
+                      Content="{DynamicResource Text.Preference.General.Check4UpdatesOnStartup}"
+                      IsChecked="{Binding Source={x:Static vm:Preference.Instance}, Path=Check4UpdatesOnStartup, Mode=TwoWay}"/>
           </Grid>
         </TabItem>
 

src/SourceGit/Views/SelfUpdate.axaml

@@ -0,0 +1,153 @@
+<Window xmlns="https://github.com/avaloniaui"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+        xmlns:m="using:SourceGit.Models"
+        xmlns:vm="using:SourceGit.ViewModels"
+        xmlns:sys="clr-namespace:System;assembly=mscorlib"
+        mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
+        x:Class="SourceGit.Views.SelfUpdate"
+        x:DataType="vm:SelfUpdate"
+        Title="{DynamicResource Text.SelfUpdate.Title}"
+        Icon="/App.ico"
+        Background="Transparent"
+        SizeToContent="WidthAndHeight"
+        CanResize="False"
+        WindowStartupLocation="CenterOwner"
+        ExtendClientAreaToDecorationsHint="True"
+        ExtendClientAreaChromeHints="NoChrome"
+        SystemDecorations="{OnPlatform Full, Linux=None}">
+  <Grid RowDefinitions="Auto,*" Margin="{OnPlatform 0, Linux=6}">
+    <!-- Custom window shadow for Linux -->
+    <Border Grid.Row="0" Grid.RowSpan="2"
+            Background="{DynamicResource Brush.Window}"
+            Effect="drop-shadow(0 0 6 #A0000000)"
+            IsVisible="{OnPlatform False, Linux=True}"/>
+
+    <!-- TitleBar -->
+    <Grid Grid.Row="0" ColumnDefinitions="Auto,*,Auto" Height="30">
+      <Border Grid.Column="0" Grid.ColumnSpan="3"
+              Background="{DynamicResource Brush.TitleBar}"
+              BorderThickness="0,0,0,1" BorderBrush="{DynamicResource Brush.Border0}"
+              PointerPressed="BeginMoveWindow"/>
+
+      <Path Grid.Column="0"
+            Width="14" Height="14"
+            Margin="10,0,0,0"
+            Data="{StaticResource Icons.SoftwareUpdate}"
+            IsVisible="{OnPlatform True, macOS=False}"/>
+
+      <Grid Grid.Column="0" Classes="caption_button_box" Margin="2,4,0,0" IsVisible="{OnPlatform False, macOS=True}">
+        <Button Classes="caption_button_macos" Click="CloseWindow">
+          <Grid>
+            <Ellipse Fill="{DynamicResource Brush.MacOS.Close}"/>
+            <Path Height="6" Width="6" Stretch="Fill" Fill="#404040" Stroke="#404040" StrokeThickness="1" Data="{StaticResource Icons.Window.Close}"/>
+          </Grid>
+        </Button>
+      </Grid>
+
+      <TextBlock Grid.Column="0" Grid.ColumnSpan="3"
+                 Classes="bold"
+                 Text="{DynamicResource Text.SelfUpdate.Title}"
+                 HorizontalAlignment="Center" VerticalAlignment="Center"
+                 IsHitTestVisible="False"/>
+
+      <Button Grid.Column="2"
+              Classes="caption_button"
+              Click="CloseWindow"
+              IsVisible="{OnPlatform True, macOS=False}">
+        <Path Data="{StaticResource Icons.Window.Close}"/>
+      </Button>
+    </Grid>
+
+    <!-- Body -->
+    <Grid Grid.Row="1" Background="{DynamicResource Brush.Window}">
+      <ContentControl Content="{Binding Data}">
+        <ContentControl.DataTemplates>
+          <DataTemplate DataType="m:Version">
+            <StackPanel Orientation="Vertical" Margin="16,8">
+              <StackPanel Orientation="Horizontal" HorizontalAlignment="Center" Margin="0,8">
+                <Path Width="14" Height="14" Data="{StaticResource Icons.Info}" Fill="Green"/>
+                <TextBlock Margin="8,0,0,0" FontWeight="Bold" FontSize="14" Text="{DynamicResource Text.SelfUpdate.Available}"/>
+                <Border Margin="4,0,0,0" Height="20" CornerRadius="10" Background="{DynamicResource Brush.Accent1}" Effect="drop-shadow(0 0 6 #40000000)">
+                  <TextBlock Classes="monospace" Margin="8,0" Text="{Binding TagName}" FontSize="12" Foreground="White"/>
+                </Border>
+              </StackPanel>
+
+              <TextBox IsReadOnly="True"
+                       TextWrapping="Wrap"
+                       ScrollViewer.VerticalScrollBarVisibility="Auto"
+                       MaxWidth="500" MaxHeight="400"
+                       Margin="0,8" Padding="0"
+                       VerticalContentAlignment="Top"
+                       Text="{Binding Body}"/>
+
+              <StackPanel Orientation="Horizontal" HorizontalAlignment="Center">
+                <Button Classes="flat primary"
+                        Height="30"
+                        Click="GotoDownload"
+                        HorizontalContentAlignment="Center"
+                        VerticalContentAlignment="Center">
+                  <StackPanel Orientation="Horizontal">
+                    <Path Width="12" Height="12" Data="{StaticResource Icons.Pull}"/>
+                    <TextBlock Text="{DynamicResource Text.SelfUpdate.GotoDownload}" Margin="8,0,0,0"/>
+                  </StackPanel>
+                </Button>
+
+                <Button Classes="flat"
+                        Height="30"
+                        Margin="8,0,0,0"
+                        Click="IgnoreThisVersion"
+                        HorizontalContentAlignment="Center"
+                        VerticalContentAlignment="Center">
+                  <StackPanel Orientation="Horizontal">
+                    <Path Width="12" Height="12" Data="{StaticResource Icons.File.Ignore}"/>
+                    <TextBlock Text="{DynamicResource Text.SelfUpdate.IgnoreThisVersion}" Margin="8,0,0,0"/>
+                  </StackPanel>
+                </Button>
+              </StackPanel>
+            </StackPanel>
+          </DataTemplate>
+
+          <DataTemplate DataType="sys:Exception">
+            <StackPanel Orientation="Vertical" Margin="16,8">
+              <StackPanel Orientation="Horizontal" HorizontalAlignment="Center">
+                <Path Width="14" Height="14" Data="{StaticResource Icons.Error}" Fill="Red"/>
+                <TextBlock Margin="8,0,0,0" FontWeight="Bold" FontSize="14" Text="{DynamicResource Text.SelfUpdate.Error}"/>
+              </StackPanel>
+
+              <TextBlock Text="{Binding Message}" MaxWidth="500" TextWrapping="Wrap" Margin="0,8"/>
+
+              <Button Classes="flat primary"
+                      Height="30"
+                      Margin="4,0"
+                      Click="CloseWindow"
+                      Content="{DynamicResource Text.Close}"
+                      HorizontalAlignment="Center"
+                      HorizontalContentAlignment="Center"
+                      VerticalContentAlignment="Center"/>
+            </StackPanel>
+          </DataTemplate>
+
+          <DataTemplate DataType="m:AlreadyUpToDate">
+            <StackPanel Orientation="Vertical" Margin="16,8">
+              <StackPanel Orientation="Horizontal" HorizontalAlignment="Center" Margin="0,8">
+                <Path Width="14" Height="14" Data="{StaticResource Icons.Info}" Fill="Green"/>
+                <TextBlock Margin="8,0,0,0" Text="{DynamicResource Text.SelfUpdate.UpToDate}"/>
+              </StackPanel>              
+
+              <Button Classes="flat primary"
+                      Height="30"
+                      Margin="4,0"
+                      Click="CloseWindow"
+                      Content="{DynamicResource Text.Close}"
+                      HorizontalAlignment="Center"
+                      HorizontalContentAlignment="Center"
+                      VerticalContentAlignment="Center"/>
+            </StackPanel>
+          </DataTemplate>
+        </ContentControl.DataTemplates>
+      </ContentControl>
+    </Grid>
+  </Grid>
+</Window>

src/SourceGit/Views/SelfUpdate.axaml.cs

@@ -0,0 +1,39 @@
+using Avalonia.Controls;
+using Avalonia.Input;
+using Avalonia.Interactivity;
+
+namespace SourceGit.Views
+{
+    public partial class SelfUpdate : Window
+    {
+        public SelfUpdate()
+        {
+            InitializeComponent();
+        }
+
+        private void BeginMoveWindow(object sender, PointerPressedEventArgs e)
+        {
+            BeginMoveDrag(e);
+        }
+
+        private void CloseWindow(object sender, RoutedEventArgs e)
+        {
+            Close();
+        }
+
+        private void GotoDownload(object sender, RoutedEventArgs e)
+        {
+            Native.OS.OpenBrowser("https://github.com/sourcegit-scm/sourcegit/releases/latest");
+            e.Handled = true;
+        }
+
+        private void IgnoreThisVersion(object sender, RoutedEventArgs e)
+        {
+            var button = sender as Button;
+            var ver = button.DataContext as Models.Version;
+            ViewModels.Preference.Instance.IgnoreUpdateTag = ver.TagName;
+            Close();
+            e.Handled = true;
+        }
+    }
+}