feature<DeleteSubmodule>: add context menu to delete submodules

src/Git/Repository.cs

@@ -974,6 +974,27 @@ namespace SourceGit.Git {
             isWatcherDisabled = false;
         }
 
+        /// <summary>
+        ///     Delete submodule
+        /// </summary>
+        /// <param name="path"></param>
+        public void DeleteSubmodule(string path) {
+            isWatcherDisabled = true;
+
+            var errs = RunCommand($"submodule deinit -f {path}", null);
+            if (errs != null) {
+                App.RaiseError(errs);
+            } else {
+                errs = RunCommand($"rm -f {path}", null);
+                if (errs != null) App.RaiseError(errs);
+
+                OnWorkingCopyChanged?.Invoke();
+                OnSubmoduleChanged?.Invoke();
+            }
+
+            isWatcherDisabled = false;
+        }
+
         /// <summary>
         ///     Blame file.
         /// </summary>

src/Resources/Locales/en_US.xaml

@@ -50,6 +50,7 @@
     <sys:String x:Key="Text.Submodule.FetchNested">Fetch nested submodules</sys:String>
     <sys:String x:Key="Text.Submodule.Open">Open Submodule Repository</sys:String>
     <sys:String x:Key="Text.Submodule.CopyPath">Copy Relative Path</sys:String>
+    <sys:String x:Key="Text.Submodule.Remove">Delete Submodule</sys:String>
 
     <sys:String x:Key="Text.CherryPick">Cherry-Pick This Commit</sys:String>
     <sys:String x:Key="Text.CherryPick.Title">Cherry Pick</sys:String>
@@ -215,6 +216,9 @@
     <sys:String x:Key="Text.DeleteTag.Tag">Tag :</sys:String>
     <sys:String x:Key="Text.DeleteTag.WithRemote">Delete from remote repositories</sys:String>
 
+    <sys:String x:Key="Text.DeleteSubmodule">Confirm To Delete Submodule</sys:String>
+    <sys:String x:Key="Text.DeleteSubmodule.Path">Submodule Path ：</sys:String>
+
     <sys:String x:Key="Text.Diff.Next">Next Difference</sys:String>
     <sys:String x:Key="Text.Diff.Prev">Previous Difference</sys:String>
     <sys:String x:Key="Text.Diff.Mode">Toggle One-Side/Two-Sides</sys:String>

src/Resources/Locales/zh_CN.xaml

@@ -50,6 +50,7 @@
     <sys:String x:Key="Text.Submodule.FetchNested">拉取子孙模块</sys:String>
     <sys:String x:Key="Text.Submodule.Open">打开仓库</sys:String>
     <sys:String x:Key="Text.Submodule.CopyPath">复制路径</sys:String>
+    <sys:String x:Key="Text.Submodule.Remove">删除子模块</sys:String>
 
     <sys:String x:Key="Text.CherryPick">挑选此提交</sys:String>
     <sys:String x:Key="Text.CherryPick.Title">挑选提交</sys:String>
@@ -214,6 +215,9 @@
 	<sys:String x:Key="Text.DeleteTag">确定要移除该标签吗？</sys:String>
     <sys:String x:Key="Text.DeleteTag.Tag">标签名 ：</sys:String>
     <sys:String x:Key="Text.DeleteTag.WithRemote">同时删除远程仓库中的此标签</sys:String>
+    
+	<sys:String x:Key="Text.DeleteSubmodule">确定要移除该子模块吗？</sys:String>
+    <sys:String x:Key="Text.DeleteSubmodule.Path">子模块路径 ：</sys:String>
 
 	<sys:String x:Key="Text.Diff.Next">下一个差异</sys:String>
     <sys:String x:Key="Text.Diff.Prev">上一个差异</sys:String>

src/UI/Dashboard.xaml.cs

@@ -1026,9 +1026,17 @@ namespace SourceGit.UI {
                 ev.Handled = true;
             };
 
+            var rm = new MenuItem();
+            rm.Header = App.Text("Submodule.Remove");
+            rm.Click += (o, ev) => {
+                DeleteSubmodule.Show(repo, path);
+                ev.Handled = true;
+            };
+
             var menu = new ContextMenu();
             menu.Items.Add(open);
             menu.Items.Add(copy);
+            menu.Items.Add(rm);
             menu.IsOpen = true;
 
             e.Handled = true;

src/UI/DeleteSubmodule.xaml

@@ -0,0 +1,42 @@
+<UserControl x:Class="SourceGit.UI.DeleteSubmodule"
+             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
+             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+             mc:Ignorable="d" 
+             d:DesignHeight="128" d:DesignWidth="500" Height="128" Width="500">
+    <Grid>
+        <Grid.RowDefinitions>
+            <RowDefinition Height="32"/>
+            <RowDefinition Height="16"/>
+            <RowDefinition Height="32"/>
+            <RowDefinition Height="16"/>
+            <RowDefinition Height="32"/>
+        </Grid.RowDefinitions>
+
+        <Grid.ColumnDefinitions>
+            <ColumnDefinition Width="200"/>
+            <ColumnDefinition Width="*"/>
+        </Grid.ColumnDefinitions>
+
+        <Label Grid.Row="0" Grid.ColumnSpan="2" FontWeight="DemiBold" FontSize="18" Content="{StaticResource Text.DeleteSubmodule}"/>
+
+        <Label Grid.Row="2" Grid.Column="0" HorizontalAlignment="Right" Content="{StaticResource Text.DeleteSubmodule.Path}"/>
+        <StackPanel Grid.Row="2" Grid.Column="1" Orientation="Horizontal">
+            <Path Width="12" Data="{StaticResource Icon.Submodule}" Margin="4,0"/>
+            <TextBlock x:Name="targetPath" Foreground="{StaticResource Brush.FG1}" VerticalAlignment="Center"/>
+        </StackPanel>
+
+        <Grid Grid.Row="4" Grid.ColumnSpan="2">
+            <Grid.ColumnDefinitions>
+                <ColumnDefinition Width="*"/>
+                <ColumnDefinition Width="80"/>
+                <ColumnDefinition Width="8"/>
+                <ColumnDefinition Width="80"/>
+            </Grid.ColumnDefinitions>
+
+            <Button Grid.Column="1" Click="Sure" Content="{StaticResource Text.Sure}" Style="{StaticResource Style.Button.AccentBordered}"/>
+            <Button Grid.Column="3" Click="Cancel" Content="{StaticResource Text.Cancel}" Style="{StaticResource Style.Button.Bordered}"/>
+        </Grid>
+    </Grid>
+</UserControl>

src/UI/DeleteSubmodule.xaml.cs

@@ -0,0 +1,36 @@
+using System.Threading.Tasks;
+using System.Windows;
+using System.Windows.Controls;
+
+namespace SourceGit.UI {
+
+    /// <summary>
+    ///     Interaction logic for DeleteSubmodule.xaml
+    /// </summary>
+    public partial class DeleteSubmodule : UserControl {
+        private Git.Repository repo = null;
+        private string submodule = null;
+
+        public DeleteSubmodule(Git.Repository opened, string path) {
+            InitializeComponent();
+            repo = opened;
+            submodule = path;
+            targetPath.Text = path;
+        }
+
+        public static void Show(Git.Repository repo, string submodule) {
+            repo.GetPopupManager()?.Show(new DeleteSubmodule(repo, submodule));
+        }
+
+        private async void Sure(object sender, RoutedEventArgs e) {
+            var popup = repo.GetPopupManager();
+            popup?.Lock();
+            await Task.Run(() => repo.DeleteSubmodule(submodule));
+            popup?.Close(true);
+        }
+
+        private void Cancel(object sender, RoutedEventArgs e) {
+            repo.GetPopupManager()?.Close();
+        }
+    }
+}