feature<SubTree>: supports git subtree feature

src/Commands/SubTree.cs

@@ -0,0 +1,39 @@
+using System;
+
+namespace SourceGit.Commands {
+    /// <summary>
+    ///     子树相关操作
+    /// </summary>
+    public class SubTree : Command {
+        private Action<string> handler = null;
+
+        public SubTree(string repo) {
+            Cwd = repo;
+            TraitErrorAsOutput = true;
+        }
+
+        public override void OnReadline(string line) {
+            handler?.Invoke(line);
+        }
+
+        public bool Add(string prefix, string source, string revision, bool squash, Action<string> onProgress) {
+            handler = onProgress;
+            Args = $"subtree add --prefix=\"{prefix}\" {source} {revision}";
+            if (squash) Args += " --squash";
+            return Exec();
+        }
+
+        public void Pull(string prefix, string source, string branch, bool squash, Action<string> onProgress) {
+            handler = onProgress;
+            Args = $"subtree pull --prefix=\"{prefix}\" {source} {branch}";
+            if (squash) Args += " --squash";
+            Exec();
+        }
+
+        public void Push(string prefix, string source, string branch, Action<string> onProgress) {
+            handler = onProgress;
+            Args = $"subtree push --prefix=\"{prefix}\" {source} {branch}";
+            Exec();
+        }
+    }
+}

src/Models/Repository.cs

@@ -19,6 +19,7 @@ namespace SourceGit.Models {
         public string GitDir { get; set; } = "";
         public string GroupId { get; set; } = "";
         public int Bookmark { get; set; } = 0;
+        public List<SubTree> SubTrees { get; set; } = new List<SubTree>();
         public List<string> Filters { get; set; } = new List<string>();
         public List<string> CommitMessages { get; set; } = new List<string>();
         #endregion

src/Models/SubTree.cs

@@ -0,0 +1,10 @@
+namespace SourceGit.Models {
+    /// <summary>
+    ///     子树
+    /// </summary>
+    public class SubTree {
+        public string Prefix { get; set; }
+        public string Remote { get; set; }
+        public string Branch { get; set; } = "master";
+    }
+}

src/Models/Watcher.cs

@@ -38,6 +38,10 @@ namespace SourceGit.Models {
         ///     子模块变更
         /// </summary>
         public event Action SubmoduleChanged;
+        /// <summary>
+        ///     树更新
+        /// </summary>
+        public event Action SubTreeChanged;
 
         /// <summary>
         ///     打开仓库事件
@@ -119,6 +123,13 @@ namespace SourceGit.Models {
             WorkingCopyChanged?.Invoke();
         }
 
+        /// <summary>
+        ///     通知更新子树列表
+        /// </summary>
+        public void RefreshSubTrees() {
+            SubTreeChanged?.Invoke();
+        }
+
         private void Start(string repo, string gitDir) {
             wcWatcher = new FileSystemWatcher();
             wcWatcher.Path = repo;
@@ -163,6 +174,7 @@ namespace SourceGit.Models {
             TagChanged = null;
             StashChanged = null;
             SubmoduleChanged = null;
+            SubTreeChanged = null;
         }
 
         private void OnRepositoryChanged(object o, FileSystemEventArgs e) {

src/Resources/Icons.xaml

@@ -2,13 +2,15 @@
                     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
     <Geometry x:Key="Icon.Git">M1004.8 466.4 557.7 19.3c-25.7-25.8-67.5-25.8-93.3 0L360.6 123.2l78.2 78.2c12.5-6 26.6-9.4 41.4-9.4c53 0 96 43 96 96c0 14.8-3.4 28.9-9.4 41.4l128 128c12.5-6 26.6-9.4 41.4-9.4c53 0 96 43 96 96s-43 96-96 96s-96-43-96-96c0-14.8 3.4-28.9 9.4-41.4L521.5 374.6a88.8 88.8 0 01-9.4 3.9v267c37.3 13.2 64 48.7 64 90.5c0 53-43 96-96 96s-96-43-96-96c0-41.8 26.7-77.3 64-90.5V378.5c-37.3-13.2-64-48.7-64-90.5c0-14.8 3.4-28.9 9.4-41.4l-78.2-78.2L19.4 464.3c-25.8 25.8-25.8 67.5 0 93.3l447.1 447.1c25.7 25.8 67.5 25.8 93.3 0l445-445c25.8-25.8 25.8-67.6 0-93.3z</Geometry>
     <Geometry x:Key="Icon.Submodule">M557.7 545.3 789.9 402.7c24-15 31.3-46.5 16.4-70.5c-14.8-23.8-46-31.2-70-16.7L506.5 456.6 277.1 315.4c-24.1-14.8-55.6-7.3-70.5 16.8c-14.8 24.1-7.3 55.6 16.8 70.5l231.8 142.6V819.1c0 28.3 22.9 51.2 51.2 51.2c28.3 0 51.2-22.9 51.2-51.2V545.3h.1zM506.5 0l443.4 256v511.9L506.5 1023.9 63.1 767.9v-511.9L506.5 0z</Geometry>
+    <Geometry x:Key="Icon.SubTree">M491 256h469c13 0 21-9 21-21v-171c0-13-9-21-21-21h-469c-13 0-21 9-21 21V128H256V64c0-13-9-21-21-21h-171c-13 0-21 9-21 21v171c0 13 9 21 21 21H128v597h341v64c0 13 9 21 21 21h469c13 0 21-9 21-21v-171c0-13-9-21-21-21h-469c-13 0-21 9-21 21V811H171v-299h299v64c0 13 9 21 21 21h469c13 0 21-9 21-21v-171c0-13-9-21-21-21h-469c-13 0-21 9-21 21V469H171V256h64c13 0 21-9 21-21V171h213v64c0 13 9 21 21 21z</Geometry>
     <Geometry x:Key="Icon.LFS">M170 470l0 84 86 0 0-84-86 0zM86 598l0-172 852 0 0 172-852 0zM256 298l0-84-86 0 0 84 86 0zM86 170l852 0 0 172-852 0 0-172zM170 726l0 84 86 0 0-84-86 0zM86 854l0-172 852 0 0 172-852 0z</Geometry>
     <Geometry x:Key="Icon.NewPage">M853.3 960H170.7V64h469.3l213.3 213.3zM821.3 298.7H618.7V96z</Geometry>
     <Geometry x:Key="Icon.Bookmark">M192 0l0 1024 320-320 320 320 0-1024z</Geometry>
     <Geometry x:Key="Icon.Detail">M888.8 0H135.2c-32.3 0-58.9 26.1-58.9 58.9v906.2c0 32.3 26.1 58.9 58.9 58.9h753.2c32.3 0 58.9-26.1 58.9-58.9v-906.2c.5-32.8-26.1-58.9-58.4-58.9zm-164.9 176.6c30.7 0 55.8 25.1 55.8 55.8s-25.1 55.8-55.8 55.8s-55.8-25.1-55.8-55.8s24.6-55.8 55.8-55.8zm-212 0c30.7 0 55.8 25.1 55.8 55.8S542.7 288.3 512 288.3s-55.8-25.1-55.8-55.8S481.3 176.6 512 176.6zm-212 0c30.7 0 55.8 25.1 55.8 55.8s-25.1 55.8-55.8 55.8s-55.8-25.1-55.8-55.8s25.1-55.8 55.8-55.8zm208.9 606.2H285.2c-24.6 0-44-20-44-44c0-24.6 20-44 44-44h223.7c24.6 0 44 20 44 44c0 24.1-19.5 44-44 44zm229.9-212H285.2c-24.6 0-44-20-44-44c0-24.6 20-44 44-44h453.1c24.6 0 44 20 44 44c.5 24.1-19.5 44-43.5 44z</Geometry>
     <Geometry x:Key="Icon.NewTab">M490.7 85.3l42.7 0 0 853.3-42.7 0 0-853.3zM85.3 490.7l853.3 0 0 42.7-853.3 0 0-42.7z</Geometry>
     <Geometry x:Key="Icon.Copy">M682.7 42.7H85.3v682.7h85.3V128h512V42.7zM256 213.3l4.5 768H896V213.3H256zm554.7 682.7H341.3V298.7h469.3v597.3z</Geometry>
-
+    <Geometry x:Key="Icon.TreeAddNode">M204 291c45-11 77-49 77-96c0-53-43-98-98-98c-53 0-98 45-98 98c0 47 34 87 77 96v91c0 13 9 21 21 21h236c2 38 32 68 70 68h372c41 0 73-32 73-73v-38c0-41-32-73-73-73h-370c-38 0-70 30-70 68H204V291zm258 74h2c0-15 13-30 30-30h372c15 0 30 13 30 30v38c0 15-13 30-30 30h-375c-15 0-30-13-30-30v-38zM183 250c-30 0-55-26-55-55s26-55 55-55s55 26 55 55s-26 55-55 55zM679 495c-134 0-244 109-244 244s109 244 244 244c134 0 244-109 244-244s-109-244-244-244zm159 268h-134v134h-50V764H521v-50h134v-134h50v134h134V764zM244 766H185c-13 0-23-11-23-23s11-23 23-23h59c13 0 23 11 23 23s-11 23-23 23zM368 766h-42c-9 0-17-8-17-17v-13c0-9 8-17 17-17h42c9 0 17 8 17 17v13c0 9-8 17-17 17zM183 766c-12 0-21-9-21-21V320c0-12 9-21 21-21c12 0 21 9 21 21v425c0 12-10 21-21 21z</Geometry>
+    
     <Geometry x:Key="Icon.Minimize">M256 811h512v85H256z</Geometry>
     <Geometry x:Key="Icon.Maximize">M922 205v614H154V205h768zm-51 51H205v512h666V256z</Geometry>
     <Geometry x:Key="Icon.Close">M899 203 821 125 512 434 203 125 125 203 434 512 125 821 203 899 512 590 821 899 899 821 590 512z</Geometry>

src/Resources/Locales/en_US.xaml

@@ -128,6 +128,8 @@
     <sys:String x:Key="Text.Dashboard.Submodules">SUBMODULES</sys:String>
     <sys:String x:Key="Text.Dashboard.Submodules.Add">ADD SUBMODULE</sys:String>
     <sys:String x:Key="Text.Dashboard.Submodules.Update">UPDATE SUBMODULE</sys:String>
+    <sys:String x:Key="Text.Dashboard.SubTrees">SUBTREES</sys:String>
+    <sys:String x:Key="Text.Dashboard.SubTrees.Add">ADD/LINK SUBTREE</sys:String>
     <sys:String x:Key="Text.Dashboard.Resolve">RESOLVE</sys:String>
     <sys:String x:Key="Text.Dashboard.Continue">CONTINUE</sys:String>
     <sys:String x:Key="Text.Dashboard.Abort">ABORT</sys:String>
@@ -425,7 +427,33 @@
 
     <sys:String x:Key="Text.Restart.Title">NOTICE</sys:String>
     <sys:String x:Key="Text.Restart.Content">Restart required to apply changes in preference. Restart now?</sys:String>
-    
+
+    <sys:String x:Key="Text.AddSubTree">Add/Link SubTree</sys:String>
+    <sys:String x:Key="Text.AddSubTree.Source">Source URL :</sys:String>
+    <sys:String x:Key="Text.AddSubTree.Branch">Branch/Commit :</sys:String>
+    <sys:String x:Key="Text.AddSubTree.Prefix">Local Relative Path :</sys:String>
+    <sys:String x:Key="Text.AddSubTree.Squash">Squash commits?</sys:String>
+
+    <sys:String x:Key="Text.EditSubTree">Edit SubTree</sys:String>
+    <sys:String x:Key="Text.EditSubTree.Source">Source URL :</sys:String>
+    <sys:String x:Key="Text.EditSubTree.Prefix">Local Relative Path :</sys:String>
+
+    <sys:String x:Key="Text.UnlinkSubTree">Unlink SubTree</sys:String>
+    <sys:String x:Key="Text.UnlinkSubTree.Prefix">Local Relative Path :</sys:String>
+    <sys:String x:Key="Text.UnlinkSubTree.Tips">This will only remove links.</sys:String>
+
+    <sys:String x:Key="Text.SubTreePullOrPush.Pull">Pull Changes Of SubTree</sys:String>
+    <sys:String x:Key="Text.SubTreePullOrPush.Push">Push Changes Of SubTree</sys:String>
+    <sys:String x:Key="Text.SubTreePullOrPush.Prefix">Local Relative Path :</sys:String>
+    <sys:String x:Key="Text.SubTreePullOrPush.Source">Remote :</sys:String>
+    <sys:String x:Key="Text.SubTreePullOrPush.Branch">Branch :</sys:String>
+    <sys:String x:Key="Text.SubTreePullOrPush.Squash">Squash commits?</sys:String>
+
+    <sys:String x:Key="Text.SubTree.Edit">Edit ...</sys:String>
+    <sys:String x:Key="Text.SubTree.Unlink">Unlink ...</sys:String>
+    <sys:String x:Key="Text.SubTree.Pull">Pull ...</sys:String>
+    <sys:String x:Key="Text.SubTree.Push">Push ...</sys:String>
+
     <sys:String x:Key="Text.NotConfigured">Git has NOT been configured.\nPlease to go [Preference] and configure it first.</sys:String>
     <sys:String x:Key="Text.PathNotFound">Path[{0}] not exists!</sys:String>
     <sys:String x:Key="Text.MissingBash">Can NOT locate bash.exe. Make sure bash.exe exists under the same folder with git.exe</sys:String>
@@ -448,6 +476,7 @@
     <sys:String x:Key="Text.DuplicatedTagName">Duplicated tag name!</sys:String>
     <sys:String x:Key="Text.EmptyCommitMessage">Commit subject can NOT be empty</sys:String>
     <sys:String x:Key="Text.BadPatchFile">Invalid path for patch file</sys:String>
-    <sys:String x:Key="Text.BadSubmodulePath">Invalid path for submodules</sys:String>
+    <sys:String x:Key="Text.BadRelativePath">Invalid relative path</sys:String>
     <sys:String x:Key="Text.BadArchiveFile">Invalid path for archive file</sys:String>
+    <sys:String x:Key="Text.Required">This field is required</sys:String>
 </ResourceDictionary>

src/Resources/Locales/zh_CN.xaml

@@ -128,6 +128,8 @@
     <sys:String x:Key="Text.Dashboard.Submodules">子模块列表</sys:String>
     <sys:String x:Key="Text.Dashboard.Submodules.Add">添加子模块</sys:String>
     <sys:String x:Key="Text.Dashboard.Submodules.Update">更新子模块</sys:String>
+    <sys:String x:Key="Text.Dashboard.SubTrees">子树列表</sys:String>
+    <sys:String x:Key="Text.Dashboard.SubTrees.Add">添加子树</sys:String>
     <sys:String x:Key="Text.Dashboard.Resolve">解决冲突</sys:String>
     <sys:String x:Key="Text.Dashboard.Continue">下一步</sys:String>
     <sys:String x:Key="Text.Dashboard.Abort">终止冲突解决</sys:String>
@@ -426,6 +428,32 @@
     <sys:String x:Key="Text.Restart.Title">系统提示</sys:String>
     <sys:String x:Key="Text.Restart.Content">本次配置变更需要在重启后生效，是否立即重启？</sys:String>
 
+    <sys:String x:Key="Text.AddSubTree">添加子树</sys:String>
+    <sys:String x:Key="Text.AddSubTree.Source">远程地址：</sys:String>
+    <sys:String x:Key="Text.AddSubTree.Branch">分支或提交ID：</sys:String>
+    <sys:String x:Key="Text.AddSubTree.Prefix">本地相对路径：</sys:String>
+    <sys:String x:Key="Text.AddSubTree.Squash">合并提交为单一提交</sys:String>
+
+    <sys:String x:Key="Text.EditSubTree">编辑子树信息</sys:String>
+    <sys:String x:Key="Text.EditSubTree.Source">远程地址：</sys:String>
+    <sys:String x:Key="Text.EditSubTree.Prefix">本地相对路径：</sys:String>
+
+    <sys:String x:Key="Text.UnlinkSubTree">删除子树</sys:String>
+    <sys:String x:Key="Text.UnlinkSubTree.Prefix">本地相对路径：</sys:String>
+    <sys:String x:Key="Text.UnlinkSubTree.Tips">本操作仅将子树信息删除，相关文件及提交不会更改</sys:String>
+
+    <sys:String x:Key="Text.SubTreePullOrPush.Pull">拉取子树更新</sys:String>
+    <sys:String x:Key="Text.SubTreePullOrPush.Push">推送子树更新到远程</sys:String>
+    <sys:String x:Key="Text.SubTreePullOrPush.Prefix">本地相对路径：</sys:String>
+    <sys:String x:Key="Text.SubTreePullOrPush.Source">远程地址：</sys:String>
+    <sys:String x:Key="Text.SubTreePullOrPush.Branch">远程分支：</sys:String>
+    <sys:String x:Key="Text.SubTreePullOrPush.Squash">合并提交为单一提交</sys:String>
+
+    <sys:String x:Key="Text.SubTree.Edit">编辑子树 ...</sys:String>
+    <sys:String x:Key="Text.SubTree.Unlink">删除子树 ...</sys:String>
+    <sys:String x:Key="Text.SubTree.Pull">拉取子树更新</sys:String>
+    <sys:String x:Key="Text.SubTree.Push">推送子树变更</sys:String>
+
     <sys:String x:Key="Text.NotConfigured">GIT尚未配置。请打开【偏好设置】配置GIT路径。</sys:String>
     <sys:String x:Key="Text.PathNotFound">路径（{0}）不存在或不可读取!</sys:String>
     <sys:String x:Key="Text.MissingBash">无法找到bash.exe，请确保其在git.exe同目录中！</sys:String>
@@ -448,6 +476,7 @@
     <sys:String x:Key="Text.DuplicatedTagName">标签名已存在!</sys:String>
     <sys:String x:Key="Text.EmptyCommitMessage">提交信息未填写!</sys:String>
     <sys:String x:Key="Text.BadPatchFile">补丁文件不存在或不可访问！</sys:String>
-    <sys:String x:Key="Text.BadSubmodulePath">非法的子模块路径！</sys:String>
+    <sys:String x:Key="Text.BadRelativePath">非法的子路径！</sys:String>
     <sys:String x:Key="Text.BadArchiveFile">非法的存档文件路径！</sys:String>
+    <sys:String x:Key="Text.Required">内容未填写！</sys:String>
 </ResourceDictionary>

src/Views/Popups/AddSubTree.xaml

@@ -0,0 +1,86 @@
+<controls:PopupWidget 
+    x:Class="SourceGit.Views.Popups.AddSubTree"
+    x:Name="me"
+    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" 
+    xmlns:controls="clr-namespace:SourceGit.Views.Controls"
+    xmlns:validations="clr-namespace:SourceGit.Views.Validations"
+    mc:Ignorable="d" 
+    d:DesignHeight="450" d:DesignWidth="800">
+    <Grid>
+        <Grid.RowDefinitions>
+            <RowDefinition Height="32"/>
+            <RowDefinition Height="32"/>
+            <RowDefinition Height="32"/>
+            <RowDefinition Height="32"/>
+        </Grid.RowDefinitions>
+
+        <Grid.ColumnDefinitions>
+            <ColumnDefinition Width="150"/>
+            <ColumnDefinition Width="*"/>
+        </Grid.ColumnDefinitions>
+
+        <TextBlock
+            Grid.Row="0" Grid.Column="0"
+            Margin="0,0,8,0"
+            Text="{StaticResource Text.AddSubTree.Source}"
+            HorizontalAlignment="Right"/>
+        <controls:TextEdit 
+            Grid.Row="0" Grid.Column="1"
+            x:Name="txtSource"
+            Height="24">
+            <controls:TextEdit.Text>
+                <Binding ElementName="me" Path="Source" UpdateSourceTrigger="PropertyChanged" Mode="TwoWay">
+                    <Binding.ValidationRules>
+                        <validations:GitURL/>
+                    </Binding.ValidationRules>
+                </Binding>
+            </controls:TextEdit.Text>
+        </controls:TextEdit>
+
+        <TextBlock
+            Grid.Row="1" Grid.Column="0"
+            Margin="0,0,8,0"
+            Text="{StaticResource Text.AddSubTree.Branch}"
+            HorizontalAlignment="Right"/>
+        <controls:TextEdit 
+            Grid.Row="1" Grid.Column="1"
+            x:Name="txtRef"
+            Height="24">
+            <controls:TextEdit.Text>
+                <Binding ElementName="me" Path="Ref" UpdateSourceTrigger="PropertyChanged" Mode="TwoWay">
+                    <Binding.ValidationRules>
+                        <validations:Required/>
+                    </Binding.ValidationRules>
+                </Binding>
+            </controls:TextEdit.Text>
+        </controls:TextEdit>
+
+        <TextBlock
+            Grid.Row="2" Grid.Column="0"
+            Margin="0,0,8,0"
+            Text="{StaticResource Text.AddSubTree.Prefix}"
+            HorizontalAlignment="Right"/>
+        <controls:TextEdit 
+            Grid.Row="2" Grid.Column="1"
+            x:Name="txtPrefix"
+            Height="24">
+            <controls:TextEdit.Text>
+                <Binding ElementName="me" Path="Prefix" UpdateSourceTrigger="PropertyChanged" Mode="TwoWay">
+                    <Binding.ValidationRules>
+                        <validations:RelativePath/>
+                    </Binding.ValidationRules>
+                </Binding>
+            </controls:TextEdit.Text>
+        </controls:TextEdit>
+
+        <CheckBox 
+            Grid.Row="3" Grid.Column="1"
+            Margin="0,4,0,0"
+            x:Name="chkSquash"
+            IsChecked="True"
+            Content="{StaticResource Text.AddSubTree.Squash}"/>
+    </Grid>
+</controls:PopupWidget>

src/Views/Popups/AddSubTree.xaml.cs

@@ -0,0 +1,57 @@
+using System.Threading.Tasks;
+using System.Windows.Controls;
+
+namespace SourceGit.Views.Popups {
+
+    /// <summary>
+    ///     添加子树面板
+    /// </summary>
+    public partial class AddSubTree : Controls.PopupWidget {
+        private Models.Repository repo = null;
+
+        public string Source { get; set; }
+        public string Ref { get; set; }
+        public string Prefix { get; set; }
+
+        public AddSubTree(Models.Repository repo) {
+            this.repo = repo;
+            InitializeComponent();
+        }
+
+        public override string GetTitle() {
+            return App.Text("AddSubTree");
+        }
+
+        public override Task<bool> Start() {
+            txtSource.GetBindingExpression(TextBox.TextProperty).UpdateSource();
+            if (Validation.GetHasError(txtSource)) return null;
+
+            txtPrefix.GetBindingExpression(TextBox.TextProperty).UpdateSource();
+            if (Validation.GetHasError(txtPrefix)) return null;
+
+            txtRef.GetBindingExpression(TextBox.TextProperty).UpdateSource();
+            if (Validation.GetHasError(txtRef)) return null;
+
+            var squash = chkSquash.IsChecked == true;
+            if (repo.SubTrees.FindIndex(x => x.Prefix == Prefix) >= 0) {
+                Models.Exception.Raise($"Subtree add failed. Prefix({Prefix}) already exists!");
+                return null;
+            }
+
+            return Task.Run(() => {
+                Models.Watcher.SetEnabled(repo.Path, false);
+                var succ = new Commands.SubTree(repo.Path).Add(Prefix, Source, Ref, squash, UpdateProgress);
+                if (succ) {
+                    repo.SubTrees.Add(new Models.SubTree() {
+                        Prefix = Prefix,
+                        Remote = Source,
+                    });
+                    Models.Preference.Save();
+                    Models.Watcher.Get(repo.Path)?.RefreshSubTrees();
+                }
+                Models.Watcher.SetEnabled(repo.Path, true);
+                return succ;
+            });
+        }
+    }
+}

src/Views/Popups/AddSubmodule.xaml

@@ -53,7 +53,7 @@
             <controls:TextEdit.Text>
                 <Binding ElementName="me" Path="Path" UpdateSourceTrigger="PropertyChanged" Mode="TwoWay">
                     <Binding.ValidationRules>
-                        <validations:SubmodulePath/>
+                        <validations:RelativePath/>
                     </Binding.ValidationRules>
                 </Binding>
             </controls:TextEdit.Text>

src/Views/Popups/EditSubTree.xaml

@@ -0,0 +1,54 @@
+<controls:PopupWidget 
+    x:Class="SourceGit.Views.Popups.EditSubTree"
+    x:Name="me"
+    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" 
+    xmlns:controls="clr-namespace:SourceGit.Views.Controls"
+    xmlns:validations="clr-namespace:SourceGit.Views.Validations"
+    mc:Ignorable="d" 
+    d:DesignHeight="450" d:DesignWidth="800">
+    <Grid>
+        <Grid.RowDefinitions>
+            <RowDefinition Height="32"/>
+            <RowDefinition Height="32"/>
+        </Grid.RowDefinitions>
+
+        <Grid.ColumnDefinitions>
+            <ColumnDefinition Width="150"/>
+            <ColumnDefinition Width="*"/>
+        </Grid.ColumnDefinitions>
+
+        <TextBlock
+            Grid.Row="0" Grid.Column="0"
+            Margin="0,0,8,0"
+            Text="{StaticResource Text.EditSubTree.Prefix}"
+            HorizontalAlignment="Right"/>
+        <StackPanel
+            Grid.Row="0" Grid.Column="1"
+            Orientation="Horizontal"
+            VerticalAlignment="Center">
+            <Path Width="14" Height="14" Data="{StaticResource Icon.SubTree}"/>
+            <TextBlock x:Name="txtPrefix" Margin="8,0,0,0"/>
+        </StackPanel>
+
+        <TextBlock
+            Grid.Row="1" Grid.Column="0"
+            Margin="0,0,8,0"
+            Text="{StaticResource Text.EditSubTree.Source}"
+            HorizontalAlignment="Right"/>
+        <controls:TextEdit 
+            Grid.Row="1" Grid.Column="1"
+            x:Name="txtSource"
+            Height="24">
+            <controls:TextEdit.Text>
+                <Binding ElementName="me" Path="Source" UpdateSourceTrigger="PropertyChanged" Mode="TwoWay">
+                    <Binding.ValidationRules>
+                        <validations:GitURL/>
+                    </Binding.ValidationRules>
+                </Binding>
+            </controls:TextEdit.Text>
+        </controls:TextEdit>
+    </Grid>
+</controls:PopupWidget>

src/Views/Popups/EditSubTree.xaml.cs

@@ -0,0 +1,34 @@
+using System.Threading.Tasks;
+using System.Windows.Controls;
+
+namespace SourceGit.Views.Popups {
+    /// <summary>
+    ///     编辑子树
+    /// </summary>
+    public partial class EditSubTree : Controls.PopupWidget {
+        private Models.Repository repo;
+        private Models.SubTree subtree;
+
+        public string Source {
+            get { return subtree.Remote; }
+            set { subtree.Remote = value; }
+        }
+
+        public EditSubTree(Models.Repository repo, string prefix) {
+            this.repo = repo;
+            this.subtree = repo.SubTrees.Find(x => x.Prefix == prefix);
+            InitializeComponent();
+            txtPrefix.Text = prefix;
+        }
+
+        public override string GetTitle() {
+            return App.Text("EditSubTree");
+        }
+
+        public override Task<bool> Start() {
+            txtSource.GetBindingExpression(TextBox.TextProperty).UpdateSource();
+            if (Validation.GetHasError(txtSource)) return null;
+            return Task.Run(() => true);
+        }
+    }
+}

src/Views/Popups/SubTreePull.xaml

@@ -0,0 +1,76 @@
+<controls:PopupWidget 
+    x:Class="SourceGit.Views.Popups.SubTreePull"
+    x:Name="me"
+    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" 
+    xmlns:controls="clr-namespace:SourceGit.Views.Controls"
+    xmlns:validations="clr-namespace:SourceGit.Views.Validations"
+    mc:Ignorable="d" 
+    d:DesignHeight="450" d:DesignWidth="800">
+    <Grid>
+        <Grid.RowDefinitions>
+            <RowDefinition Height="32"/>
+            <RowDefinition Height="32"/>
+            <RowDefinition Height="32"/>
+            <RowDefinition Height="32"/>
+        </Grid.RowDefinitions>
+
+        <Grid.ColumnDefinitions>
+            <ColumnDefinition Width="150"/>
+            <ColumnDefinition Width="*"/>
+        </Grid.ColumnDefinitions>
+
+        <TextBlock
+            Grid.Row="0" Grid.Column="0"
+            Margin="0,0,8,0"
+            Text="{StaticResource Text.SubTreePullOrPush.Prefix}"
+            HorizontalAlignment="Right"/>
+        <StackPanel
+            Grid.Row="0" Grid.Column="1"
+            Orientation="Horizontal"
+            VerticalAlignment="Center">
+            <Path Width="14" Height="14" Data="{StaticResource Icon.SubTree}"/>
+            <TextBlock x:Name="txtPrefix" Margin="8,0,0,0"/>
+        </StackPanel>
+
+        <TextBlock
+            Grid.Row="1" Grid.Column="0"
+            Margin="0,0,8,0"
+            Text="{StaticResource Text.SubTreePullOrPush.Source}"
+            HorizontalAlignment="Right"/>
+        <StackPanel
+            Grid.Row="1" Grid.Column="1"
+            Orientation="Horizontal"
+            VerticalAlignment="Center">
+            <Path Width="14" Height="14" Data="{StaticResource Icon.Remote}"/>
+            <TextBlock x:Name="txtSource" Margin="8,0,0,0"/>
+        </StackPanel>
+
+        <TextBlock
+            Grid.Row="2" Grid.Column="0"
+            Margin="0,0,8,0"
+            Text="{StaticResource Text.SubTreePullOrPush.Branch}"
+            HorizontalAlignment="Right"/>
+        <controls:TextEdit 
+            Grid.Row="2" Grid.Column="1"
+            x:Name="txtBranch"
+            Height="24">
+            <controls:TextEdit.Text>
+                <Binding ElementName="me" Path="Branch" UpdateSourceTrigger="PropertyChanged" Mode="TwoWay">
+                    <Binding.ValidationRules>
+                        <validations:Required/>
+                    </Binding.ValidationRules>
+                </Binding>
+            </controls:TextEdit.Text>
+        </controls:TextEdit>
+
+        <CheckBox 
+            Grid.Row="3" Grid.Column="1"
+            Margin="0,4,0,0"
+            x:Name="chkSquash"
+            IsChecked="True"
+            Content="{StaticResource Text.SubTreePullOrPush.Squash}"/>
+    </Grid>
+</controls:PopupWidget>

src/Views/Popups/SubTreePull.xaml.cs

@@ -0,0 +1,43 @@
+using System.Threading.Tasks;
+using System.Windows.Controls;
+
+namespace SourceGit.Views.Popups {
+    /// <summary>
+    ///     拉取
+    /// </summary>
+    public partial class SubTreePull : Controls.PopupWidget {
+        private string repo;
+        private Models.SubTree subtree;
+
+        public string Branch {
+            get { return subtree.Branch; }
+            set { subtree.Branch = value; }
+        }
+
+        public SubTreePull(string repo, Models.SubTree subtree) {
+            this.repo = repo;
+            this.subtree = subtree;
+            InitializeComponent();
+            txtPrefix.Text = subtree.Prefix;
+            txtSource.Text = subtree.Remote;
+        }
+
+        public override string GetTitle() {
+            return App.Text("SubTreePullOrPush.Pull");
+        }
+
+        public override Task<bool> Start() {
+            txtBranch.GetBindingExpression(TextBox.TextProperty).UpdateSource();
+            if (Validation.GetHasError(txtBranch)) return null;
+
+            var squash = chkSquash.IsChecked == true;
+
+            return Task.Run(() => {
+                Models.Watcher.SetEnabled(repo, false);
+                new Commands.SubTree(repo).Pull(subtree.Prefix, subtree.Remote, Branch, squash, UpdateProgress);
+                Models.Watcher.SetEnabled(repo, true);
+                return true;
+            });
+        }
+    }
+}

src/Views/Popups/SubTreePush.xaml

@@ -0,0 +1,68 @@
+<controls:PopupWidget 
+    x:Class="SourceGit.Views.Popups.SubTreePush"
+    x:Name="me"
+    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" 
+    xmlns:controls="clr-namespace:SourceGit.Views.Controls"
+    xmlns:validations="clr-namespace:SourceGit.Views.Validations"
+    mc:Ignorable="d" 
+    d:DesignHeight="450" d:DesignWidth="800">
+    <Grid>
+        <Grid.RowDefinitions>
+            <RowDefinition Height="32"/>
+            <RowDefinition Height="32"/>
+            <RowDefinition Height="32"/>
+        </Grid.RowDefinitions>
+
+        <Grid.ColumnDefinitions>
+            <ColumnDefinition Width="150"/>
+            <ColumnDefinition Width="*"/>
+        </Grid.ColumnDefinitions>
+
+        <TextBlock
+            Grid.Row="0" Grid.Column="0"
+            Margin="0,0,8,0"
+            Text="{StaticResource Text.SubTreePullOrPush.Prefix}"
+            HorizontalAlignment="Right"/>
+        <StackPanel
+            Grid.Row="0" Grid.Column="1"
+            Orientation="Horizontal"
+            VerticalAlignment="Center">
+            <Path Width="14" Height="14" Data="{StaticResource Icon.SubTree}"/>
+            <TextBlock x:Name="txtPrefix" Margin="8,0,0,0"/>
+        </StackPanel>
+
+        <TextBlock
+            Grid.Row="1" Grid.Column="0"
+            Margin="0,0,8,0"
+            Text="{StaticResource Text.SubTreePullOrPush.Source}"
+            HorizontalAlignment="Right"/>
+        <StackPanel
+            Grid.Row="1" Grid.Column="1"
+            Orientation="Horizontal"
+            VerticalAlignment="Center">
+            <Path Width="14" Height="14" Data="{StaticResource Icon.Remote}"/>
+            <TextBlock x:Name="txtSource" Margin="8,0,0,0"/>
+        </StackPanel>
+
+        <TextBlock
+            Grid.Row="2" Grid.Column="0"
+            Margin="0,0,8,0"
+            Text="{StaticResource Text.SubTreePullOrPush.Branch}"
+            HorizontalAlignment="Right"/>
+        <controls:TextEdit 
+            Grid.Row="2" Grid.Column="1"
+            x:Name="txtBranch"
+            Height="24">
+            <controls:TextEdit.Text>
+                <Binding ElementName="me" Path="Branch" UpdateSourceTrigger="PropertyChanged" Mode="TwoWay">
+                    <Binding.ValidationRules>
+                        <validations:Required/>
+                    </Binding.ValidationRules>
+                </Binding>
+            </controls:TextEdit.Text>
+        </controls:TextEdit>
+    </Grid>
+</controls:PopupWidget>

src/Views/Popups/SubTreePush.xaml.cs

@@ -0,0 +1,41 @@
+using System.Threading.Tasks;
+using System.Windows.Controls;
+
+namespace SourceGit.Views.Popups {
+    /// <summary>
+    ///     推送
+    /// </summary>
+    public partial class SubTreePush : Controls.PopupWidget {
+        private string repo;
+        private Models.SubTree subtree;
+
+        public string Branch {
+            get { return subtree.Branch; }
+            set { subtree.Branch = value; }
+        }
+
+        public SubTreePush(string repo, Models.SubTree subtree) {
+            this.repo = repo;
+            this.subtree = subtree;
+            InitializeComponent();
+            txtPrefix.Text = subtree.Prefix;
+            txtSource.Text = subtree.Remote;
+        }
+
+        public override string GetTitle() {
+            return App.Text("SubTreePullOrPush.Push");
+        }
+
+        public override Task<bool> Start() {
+            txtBranch.GetBindingExpression(TextBox.TextProperty).UpdateSource();
+            if (Validation.GetHasError(txtBranch)) return null;
+
+            return Task.Run(() => {
+                Models.Watcher.SetEnabled(repo, false);
+                new Commands.SubTree(repo).Push(subtree.Prefix, subtree.Remote, Branch, UpdateProgress);
+                Models.Watcher.SetEnabled(repo, true);
+                return true;
+            });
+        }
+    }
+}

src/Views/Popups/UnlinkSubTree.xaml

@@ -0,0 +1,40 @@
+<controls:PopupWidget 
+    x:Class="SourceGit.Views.Popups.UnlinkSubTree"
+    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" 
+    xmlns:controls="clr-namespace:SourceGit.Views.Controls"
+    mc:Ignorable="d" 
+    d:DesignHeight="450" d:DesignWidth="800">
+    <Grid>
+        <Grid.RowDefinitions>
+            <RowDefinition Height="32"/>
+            <RowDefinition Height="32"/>
+        </Grid.RowDefinitions>
+
+        <Grid.ColumnDefinitions>
+            <ColumnDefinition Width="150"/>
+            <ColumnDefinition Width="*"/>
+        </Grid.ColumnDefinitions>
+
+        <TextBlock
+            Grid.Row="0" Grid.Column="0"
+            Margin="0,0,8,0"
+            Text="{StaticResource Text.UnlinkSubTree.Prefix}"
+            HorizontalAlignment="Right"/>
+        <StackPanel
+            Grid.Row="0" Grid.Column="1"
+            Orientation="Horizontal"
+            VerticalAlignment="Center">
+            <Path Width="14" Height="14" Data="{StaticResource Icon.SubTree}"/>
+            <TextBlock x:Name="txtPrefix" Margin="8,0,0,0"/>
+        </StackPanel>
+
+        <TextBlock
+            Grid.Row="1" Grid.Column="1"
+            Margin="0,0,8,0"
+            Text="{StaticResource Text.UnlinkSubTree.Tips}"
+            HorizontalAlignment="Left"/>
+    </Grid>
+</controls:PopupWidget>

src/Views/Popups/UnlinkSubTree.xaml.cs

@@ -0,0 +1,34 @@
+using System.Threading.Tasks;
+
+namespace SourceGit.Views.Popups {
+    /// <summary>
+    ///     删除子树
+    /// </summary>
+    public partial class UnlinkSubTree : Controls.PopupWidget {
+        private Models.Repository repo;
+        private string prefix;
+
+        public UnlinkSubTree(Models.Repository repo, string prefix) {
+            this.repo = repo;
+            this.prefix = prefix;
+            InitializeComponent();
+            txtPrefix.Text = prefix;
+        }
+
+        public override string GetTitle() {
+            return App.Text("UnlinkSubTree");
+        }
+
+        public override Task<bool> Start() {
+            return Task.Run(() => {
+                var idx = repo.SubTrees.FindIndex(x => x.Prefix == prefix);
+                if (idx >= 0) {
+                    repo.SubTrees.RemoveAt(idx);
+                    Models.Preference.Save();
+                    Models.Watcher.Get(repo.Path)?.RefreshSubTrees();
+                }
+                return true;
+            });
+        }
+    }
+}

src/Views/Validations/RelativePath.cs

@@ -1,17 +1,16 @@
 using System.Globalization;
-using System.IO;
 using System.Text.RegularExpressions;
 using System.Windows.Controls;
 
 namespace SourceGit.Views.Validations {
-    public class SubmodulePath : ValidationRule {
+    public class RelativePath : ValidationRule {
         public override ValidationResult Validate(object value, CultureInfo cultureInfo) {
             var path = value as string;
             if (string.IsNullOrEmpty(path)) return ValidationResult.ValidResult;
 
             var regex = new Regex(@"^[\w\-\._/]+$");
             var succ = regex.IsMatch(path.Trim());
-            return !succ ? new ValidationResult(false, App.Text("BadSubmodulePath")) : ValidationResult.ValidResult;
+            return !succ ? new ValidationResult(false, App.Text("BadRelativePath")) : ValidationResult.ValidResult;
         }
     }
 }

src/Views/Validations/Required.cs

@@ -0,0 +1,13 @@
+using System.Globalization;
+using System.Windows.Controls;
+
+namespace SourceGit.Views.Validations {
+    public class Required : ValidationRule {
+        public override ValidationResult Validate(object value, CultureInfo cultureInfo) {
+            var path = value as string;
+            return string.IsNullOrEmpty(path) ? 
+                new ValidationResult(false, App.Text("Required")) : 
+                ValidationResult.ValidResult;
+        }
+    }
+}

src/Views/Widgets/Dashboard.xaml

@@ -110,6 +110,8 @@
                     <RowDefinition Height="Auto"/>
                     <RowDefinition Height="24"/>
                     <RowDefinition Height="Auto"/>
+                    <RowDefinition Height="24"/>
+                    <RowDefinition Height="Auto"/>
                 </Grid.RowDefinitions>
 
                 <Grid.Resources>
@@ -326,7 +328,7 @@
                     Grid.Row="7"
                     x:Name="tagList"
                     RowHeight="24"
-                    Height="200"
+                    MaxHeight="200"
                     ScrollViewer.HorizontalScrollBarVisibility="Disabled"
                     ScrollViewer.VerticalScrollBarVisibility="Auto"
                     Visibility="{Binding ElementName=tglTags, Path=IsChecked, Converter={StaticResource BoolToCollapsed}}"
@@ -386,7 +388,7 @@
                     Grid.Row="9"
                     x:Name="submoduleList"
                     RowHeight="24"
-                    Height="100"
+                    MaxHeight="100"
                     ScrollViewer.HorizontalScrollBarVisibility="Disabled"
                     ScrollViewer.VerticalScrollBarVisibility="Auto"
                     Visibility="{Binding ElementName=tglSubmodules, Path=IsChecked, Converter={StaticResource BoolToCollapsed}}"
@@ -411,6 +413,52 @@
                         </DataGridTemplateColumn>
                     </DataGrid.Columns>
                 </DataGrid>
+
+                <!-- SUBTREES -->
+                <ToggleButton
+                    Grid.Row="10"
+                    x:Name="tglSubTrees"
+                    Style="{StaticResource Style.ToggleButton.Expender}">
+                    <Grid>
+                        <Grid.ColumnDefinitions>
+                            <ColumnDefinition Width="Auto"/>
+                            <ColumnDefinition Width="*"/>
+                            <ColumnDefinition Width="Auto"/>
+                        </Grid.ColumnDefinitions>
+
+                        <TextBlock Grid.Column="0" Margin="8,0,0,0" Text="{StaticResource Text.Dashboard.SubTrees}" FontWeight="DemiBold" Foreground="{StaticResource Brush.FG2}"/>
+                        <TextBlock Grid.Column="1" x:Name="txtSubTreeCount" FontWeight="DemiBold" Margin="4,0,0,0" Foreground="{StaticResource Brush.FG2}"/>
+                        <controls:IconButton Grid.Column="2" Click="OpenAddSubTree" Width="14" Height="14" Margin="0,0,4,0" Icon="{StaticResource Icon.TreeAddNode}" ToolTip="{StaticResource Text.Dashboard.SubTrees.Add}"/>
+                    </Grid>
+                </ToggleButton>
+                <DataGrid
+                    Grid.Row="11"
+                    x:Name="subTreeList"
+                    RowHeight="24"
+                    MaxHeight="100"
+                    ScrollViewer.HorizontalScrollBarVisibility="Disabled"
+                    ScrollViewer.VerticalScrollBarVisibility="Auto"
+                    Visibility="{Binding ElementName=tglSubTrees, Path=IsChecked, Converter={StaticResource BoolToCollapsed}}"
+                    SelectionMode="Single"
+                    SelectionUnit="FullRow"
+                    ContextMenuOpening="OnSubTreeContextMenuOpening">
+                    <DataGrid.Columns>
+                        <DataGridTemplateColumn Width="*">
+                            <DataGridTemplateColumn.CellTemplate>
+                                <DataTemplate>
+                                    <Grid>
+                                        <Grid.ColumnDefinitions>
+                                            <ColumnDefinition Width="Auto"/>
+                                            <ColumnDefinition Width="*"/>
+                                        </Grid.ColumnDefinitions>
+                                        <Path Grid.Column="0" Width="10" Height="10" Margin="16,0,8,0" Data="{StaticResource Icon.SubTree}"/>
+                                        <TextBlock Grid.Column="1" Text="{Binding Prefix}"/>
+                                    </Grid>
+                                </DataTemplate>
+                            </DataGridTemplateColumn.CellTemplate>
+                        </DataGridTemplateColumn>
+                    </DataGrid.Columns>
+                </DataGrid>
             </Grid>
 
             <!-- Splitter -->

src/Views/Widgets/Dashboard.xaml.cs

@@ -60,6 +60,7 @@ namespace SourceGit.Views.Widgets {
             UpdateStashes();
             UpdateTags();
             UpdateSubmodules();
+            UpdateSubTrees();
 
             var watcher = Models.Watcher.Get(repo.Path);
             watcher.Navigate += NavigateTo;
@@ -68,6 +69,7 @@ namespace SourceGit.Views.Widgets {
             watcher.StashChanged += UpdateStashes;
             watcher.TagChanged += UpdateTags;
             watcher.SubmoduleChanged += UpdateSubmodules;
+            watcher.SubTreeChanged += UpdateSubTrees;
 
             Unloaded += (o, e) => {
                 localBranches.Clear();
@@ -257,6 +259,14 @@ namespace SourceGit.Views.Widgets {
                 });
             });
         }
+
+        private void UpdateSubTrees() {
+            Dispatcher.Invoke(() => {
+                txtSubTreeCount.Text = $"({repo.SubTrees.Count})";
+                subTreeList.ItemsSource = null;
+                subTreeList.ItemsSource = repo.SubTrees;
+            });
+        }
         #endregion
 
         #region TOOLBAR_COMMANDS
@@ -909,6 +919,55 @@ namespace SourceGit.Views.Widgets {
         }
         #endregion
 
+        #region SUBTREES
+        private void OpenAddSubTree(object sender, RoutedEventArgs e) {
+            new Popups.AddSubTree(repo).Show();
+            e.Handled = true;
+        }
+
+        private void OnSubTreeContextMenuOpening(object sender, ContextMenuEventArgs e) {
+            var subtree = subTreeList.SelectedItem as Models.SubTree;
+            if (subtree == null) return;
+
+            var edit = new MenuItem();
+            edit.Header = App.Text("SubTree.Edit");
+            edit.Click += (o, ev) => {
+                new Popups.EditSubTree(repo, subtree.Prefix).Show();
+                ev.Handled = true;
+            };
+
+            var unlink = new MenuItem();
+            unlink.Header = App.Text("SubTree.Unlink");
+            unlink.Click += (o, ev) => {
+                new Popups.UnlinkSubTree(repo, subtree.Prefix).Show();
+                ev.Handled = true;
+            };
+
+            var pull = new MenuItem();
+            pull.Header = App.Text("SubTree.Pull");
+            pull.Click += (o, ev) => {
+                new Popups.SubTreePull(repo.Path, subtree).Show();
+                ev.Handled = true;
+            };
+
+            var push = new MenuItem();
+            push.Header = App.Text("SubTree.Push");
+            push.Click += (o, ev) => {
+                new Popups.SubTreePush(repo.Path, subtree).Show();
+                ev.Handled = true;
+            };
+
+            var menu = new ContextMenu();
+            menu.Items.Add(edit);
+            menu.Items.Add(unlink);
+            menu.Items.Add(new Separator());
+            menu.Items.Add(pull);
+            menu.Items.Add(push);
+            menu.IsOpen = true;
+            e.Handled = true;
+        }
+        #endregion
+
         #region FILTERS
         private void OnFilterChanged(object sender, RoutedEventArgs e) {
             var toggle = sender as ToggleButton;