feature: allow empty commit (#587)

src/Resources/Locales/en_US.axaml

@@ -637,6 +637,7 @@
   <x:String x:Key="Text.WorkingCopy.CommitMessageHelper" xml:space="preserve">Template/Histories</x:String>
   <x:String x:Key="Text.WorkingCopy.CommitTip" xml:space="preserve">Trigger click event</x:String>
   <x:String x:Key="Text.WorkingCopy.CommitWithAutoStage" xml:space="preserve">Stage all changes and commit</x:String>
+  <x:String x:Key="Text.WorkingCopy.ConfirmCommitWithoutFiles" xml:space="preserve">Empty commit detected! Do you want to continue (--allow-empty)?</x:String>
   <x:String x:Key="Text.WorkingCopy.Conflicts" xml:space="preserve">CONFLICTS DETECTED</x:String>
   <x:String x:Key="Text.WorkingCopy.Conflicts.Resolved" xml:space="preserve">FILE CONFLICTS ARE RESOLVED</x:String>
   <x:String x:Key="Text.WorkingCopy.IncludeUntracked" xml:space="preserve">INCLUDE UNTRACKED FILES</x:String>

src/Resources/Locales/zh_CN.axaml

@@ -635,6 +635,7 @@
   <x:String x:Key="Text.WorkingCopy.CommitMessageHelper" xml:space="preserve">历史输入/模板</x:String>
   <x:String x:Key="Text.WorkingCopy.CommitTip" xml:space="preserve">触发点击事件</x:String>
   <x:String x:Key="Text.WorkingCopy.CommitWithAutoStage" xml:space="preserve">自动暂存所有变更并提交</x:String>
+  <x:String x:Key="Text.WorkingCopy.ConfirmCommitWithoutFiles" xml:space="preserve">提交未包含变更文件！是否继续(--allow-empty)？</x:String>
   <x:String x:Key="Text.WorkingCopy.Conflicts" xml:space="preserve">检测到冲突</x:String>
   <x:String x:Key="Text.WorkingCopy.Conflicts.Resolved" xml:space="preserve">文件冲突已解决</x:String>
   <x:String x:Key="Text.WorkingCopy.IncludeUntracked" xml:space="preserve">显示未跟踪文件</x:String>

src/Resources/Locales/zh_TW.axaml

@@ -640,6 +640,7 @@
   <x:String x:Key="Text.WorkingCopy.CommitMessageHelper" xml:space="preserve">歷史輸入/範本</x:String>
   <x:String x:Key="Text.WorkingCopy.CommitTip" xml:space="preserve">觸發點擊事件</x:String>
   <x:String x:Key="Text.WorkingCopy.CommitWithAutoStage" xml:space="preserve">自動暫存全部變更並提交</x:String>
+  <x:String x:Key="Text.WorkingCopy.ConfirmCommitWithoutFiles" xml:space="preserve">提交未包含變更檔案！是否繼續(--allow-empty)？</x:String>
   <x:String x:Key="Text.WorkingCopy.Conflicts" xml:space="preserve">檢測到衝突</x:String>
   <x:String x:Key="Text.WorkingCopy.Conflicts.Resolved" xml:space="preserve">檔案衝突已解決</x:String>
   <x:String x:Key="Text.WorkingCopy.IncludeUntracked" xml:space="preserve">顯示未追蹤檔案</x:String>

src/ViewModels/ConfirmCommitWithoutFiles.cs

@@ -0,0 +1,19 @@
+namespace SourceGit.ViewModels
+{
+    public class ConfirmCommitWithoutFiles
+    {
+        public ConfirmCommitWithoutFiles(WorkingCopy wc, bool autoPush)
+        {
+            _wc = wc;
+            _autoPush = autoPush;
+        }
+
+        public void Continue()
+        {
+            _wc.CommitWithoutFiles(_autoPush);
+        }
+
+        private readonly WorkingCopy _wc;
+        private bool _autoPush;
+    }
+}

src/ViewModels/WorkingCopy.cs

@@ -410,17 +410,22 @@ namespace SourceGit.ViewModels
 
         public void Commit()
         {
-            DoCommit(false, false);
+            DoCommit(false, false, false);
         }
 
         public void CommitWithAutoStage()
         {
-            DoCommit(true, false);
+            DoCommit(true, false, false);
         }
 
         public void CommitWithPush()
         {
-            DoCommit(false, true);
+            DoCommit(false, true, false);
+        }
+
+        public void CommitWithoutFiles(bool autoPush)
+        {
+            DoCommit(false, autoPush, true);
         }
 
         public ContextMenu CreateContextMenuForUnstagedChanges()
@@ -1268,7 +1273,7 @@ namespace SourceGit.ViewModels
             _repo.SetWatcherEnabled(true);
         }
 
-        private void DoCommit(bool autoStage, bool autoPush)
+        private void DoCommit(bool autoStage, bool autoPush, bool allowEmpty)
         {
             if (!PopupHost.CanCreatePopup())
             {
@@ -1282,23 +1287,16 @@ namespace SourceGit.ViewModels
                 return;
             }
 
-            if (!_useAmend)
+            if (!_useAmend && !allowEmpty)
             {
-                if (autoStage)
+                if ((autoStage && _count == 0) || (!autoStage && _staged.Count == 0))
                 {
-                    if (_count == 0)
+                    App.OpenDialog(new Views.ConfirmCommitWithoutFiles()
                     {
-                        App.RaiseException(_repo.FullPath, "No files added to commit!");
+                        DataContext = new ConfirmCommitWithoutFiles(this, autoPush)
-                        return;
+                    });
-                    }
+
-                }
+                    return;
-                else
-                {
-                    if (_staged.Count == 0)
-                    {
-                        App.RaiseException(_repo.FullPath, "No files added to commit!");
-                        return;
-                    }
                 }
             }
 
@@ -1313,7 +1311,7 @@ namespace SourceGit.ViewModels
                     succ = new Commands.Add(_repo.FullPath, _repo.IncludeUntracked).Exec();
 
                 if (succ)
-                    succ = new Commands.Commit(_repo.FullPath, _commitMessage, _useAmend).Exec();
+                    succ = new Commands.Commit(_repo.FullPath, _commitMessage, _useAmend, true).Exec();
 
                 Dispatcher.UIThread.Post(() =>
                 {

src/Views/ConfirmCommitWithoutFiles.axaml

@@ -0,0 +1,74 @@
+<v:ChromelessWindow 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:v="using:SourceGit.Views"
+                    xmlns:vm="using:SourceGit.ViewModels"
+                    mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
+                    x:Class="SourceGit.Views.ConfirmCommitWithoutFiles"
+                    x:DataType="vm:ConfirmCommitWithoutFiles"
+                    x:Name="ThisControl"
+                    Icon="/App.ico"
+                    Title="{DynamicResource Text.Warn}"
+                    SizeToContent="WidthAndHeight"
+                    CanResize="False"
+                    WindowStartupLocation="CenterOwner">
+  <Grid RowDefinitions="Auto,Auto,Auto">
+    <!-- TitleBar -->
+    <Grid Grid.Row="0" ColumnDefinitions="Auto,*,Auto" Height="30" IsVisible="{Binding !#ThisControl.UseSystemWindowFrame}">
+      <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"
+            Data="{StaticResource Icons.Error}"
+            Margin="10,0,0,0"
+            IsVisible="{OnPlatform True, macOS=False}"/>
+
+      <v:CaptionButtonsMacOS Grid.Column="0"
+                             Margin="0,2,0,0"
+                             IsCloseButtonOnly="True"
+                             IsVisible="{OnPlatform False, macOS=True}"/>
+
+      <TextBlock Grid.Column="0" Grid.ColumnSpan="3"
+                 Classes="bold"
+                 Text="{DynamicResource Text.Warn}"
+                 HorizontalAlignment="Center" VerticalAlignment="Center"
+                 IsHitTestVisible="False"/>
+
+      <v:CaptionButtons Grid.Column="2"
+                        IsCloseButtonOnly="True"
+                        IsVisible="{OnPlatform True, macOS=False}"/>
+    </Grid>
+
+    <!-- Body -->
+    <Border Grid.Row="1" Margin="16">
+      <TextBlock Text="{DynamicResource Text.WorkingCopy.ConfirmCommitWithoutFiles}"/>
+    </Border>
+
+    <!-- Buttons -->
+    <StackPanel Grid.Row="2" Margin="0,0,0,16" Orientation="Horizontal" HorizontalAlignment="Center">
+      <Button Classes="flat"
+              Width="80"
+              Height="30"
+              Margin="4,0"
+              Click="Sure"
+              Content="{DynamicResource Text.Sure}"
+              HorizontalAlignment="Center"
+              HorizontalContentAlignment="Center"
+              VerticalContentAlignment="Center"/>
+      
+      <Button Classes="flat primary"
+              Width="80"
+              Height="30"
+              Margin="4,0"
+              Click="CloseWindow"
+              Content="{DynamicResource Text.Cancel}"
+              HorizontalAlignment="Center"
+              HorizontalContentAlignment="Center"
+              VerticalContentAlignment="Center"/>
+    </StackPanel>
+  </Grid>
+</v:ChromelessWindow>

src/Views/ConfirmCommitWithoutFiles.axaml.cs

@@ -0,0 +1,33 @@
+using Avalonia.Input;
+using Avalonia.Interactivity;
+
+namespace SourceGit.Views
+{
+    public partial class ConfirmCommitWithoutFiles : ChromelessWindow
+    {
+        public ConfirmCommitWithoutFiles()
+        {
+            InitializeComponent();
+        }
+
+        private void BeginMoveWindow(object _, PointerPressedEventArgs e)
+        {
+            BeginMoveDrag(e);
+        }
+
+        private void Sure(object _1, RoutedEventArgs _2)
+        {
+            if (DataContext is ViewModels.ConfirmCommitWithoutFiles vm)
+            {
+                vm.Continue();
+            }
+
+            Close();
+        }
+
+        private void CloseWindow(object _1, RoutedEventArgs _2)
+        {
+            Close();
+        }
+    }
+}

src/Views/ConventionalCommitMessageBuilder.axaml

@@ -16,7 +16,7 @@
                     SizeToContent="Height"
                     CanResize="False"
                     WindowStartupLocation="CenterOwner">
-  <Grid RowDefinitions="Auto,Auto,Auto" MinWidth="494">
+  <Grid RowDefinitions="Auto,Auto,Auto">
     <!-- TitleBar -->
     <Grid Grid.Row="0" ColumnDefinitions="Auto,*,Auto" Height="30" IsVisible="{Binding !#ThisControl.UseSystemWindowFrame}">
       <Border Grid.Column="0" Grid.ColumnSpan="3"