[VersionControl] Implemented git init & get current branch.

Started to implement git references/branches/tags. This is needed for
more complex git operations.

12 files changed, 512 insertions, 54 deletions

diff --git a/main/src/addins/VersionControl/MonoDevelop.VersionControl.Git.ClientLibrary.Tests/MonoDevelop.VersionControl.Git.ClientLibrary.Tests.csproj b/main/src/addins/VersionControl/MonoDevelop.VersionControl.Git.ClientLibrary.Tests/MonoDevelop.VersionControl.Git.ClientLibrary.Tests.csproj
index b949740733..99d076ab60 100644
--- a/main/src/addins/VersionControl/MonoDevelop.VersionControl.Git.ClientLibrary.Tests/MonoDevelop.VersionControl.Git.ClientLibrary.Tests.csproj
+++ b/main/src/addins/VersionControl/MonoDevelop.VersionControl.Git.ClientLibrary.Tests/MonoDevelop.VersionControl.Git.ClientLibrary.Tests.csproj
@@ -43,6 +43,9 @@
     <Compile Include="MonoDevelop.VersionControl.Git.ClientLibrary.Tests\GitVersionTests.cs" />
     <Compile Include="MonoDevelop.VersionControl.Git.ClientLibrary.Tests\Git_v1_StatusTests.cs" />
     <Compile Include="MonoDevelop.VersionControl.Git.ClientLibrary.Tests\Git_v2_StatusTests.cs" />
+    <Compile Include="MonoDevelop.VersionControl.Git.ClientLibrary.Tests\GitBranchTests.cs" />
+    <Compile Include="MonoDevelop.VersionControl.Git.ClientLibrary.Tests\GitInitTests.cs" />
+    <Compile Include="MonoDevelop.VersionControl.Git.ClientLibrary.Tests\TestUtil.cs" />
   </ItemGroup>
   <ItemGroup>
     <None Include="packages.config" />
diff --git a/main/src/addins/VersionControl/MonoDevelop.VersionControl.Git.ClientLibrary.Tests/MonoDevelop.VersionControl.Git.ClientLibrary.Tests/GitBranchTests.cs b/main/src/addins/VersionControl/MonoDevelop.VersionControl.Git.ClientLibrary.Tests/MonoDevelop.VersionControl.Git.ClientLibrary.Tests/GitBranchTests.cs
new file mode 100644
index 0000000000..57c781b5ce
--- /dev/null
+++ b/main/src/addins/VersionControl/MonoDevelop.VersionControl.Git.ClientLibrary.Tests/MonoDevelop.VersionControl.Git.ClientLibrary.Tests/GitBranchTests.cs
@@ -0,0 +1,63 @@
+//
+// GitBranchTests.cs
+//
+// Author:
+//       Mike Krüger <mikkrg@microsoft.com>
+//
+// Copyright (c) 2019 Microsoft Corporation. All rights reserved.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+using System;
+using NUnit.Framework;
+using System.Threading.Tasks;
+using NUnit.Framework.Internal;
+using System.IO;
+
+namespace MonoDevelop.VersionControl.Git.ClientLibrary.Tests
+{
+	public class GitTestBase
+	{
+		protected static async Task RunTest (Func<string, Task> action)
+		{
+			var path = TestUtil.CreateTempDirectory ();
+			try {
+				var result = await GitInit.InitAsync (path);
+				Assert.IsTrue (result.Success, "git init failed:" + result.ErrorMessage);
+				await action (path);
+			} finally {
+				if (Directory.Exists (path))
+					Directory.Delete (path, true);
+			}
+		}
+	}
+
+	[TestFixture]
+	public class GitBranchTests : GitTestBase
+	{
+		[Test]
+		public Task GetCurrentBranch()
+		{
+			return RunTest (async root => {
+				var currentBranch = await BranchUtil.GetCurrentBranchAsync (root);
+				Assert.AreEqual ("master", currentBranch.Name);
+			});
+		}
+	}
+}
diff --git a/main/src/addins/VersionControl/MonoDevelop.VersionControl.Git.ClientLibrary.Tests/MonoDevelop.VersionControl.Git.ClientLibrary.Tests/GitInitTests.cs b/main/src/addins/VersionControl/MonoDevelop.VersionControl.Git.ClientLibrary.Tests/MonoDevelop.VersionControl.Git.ClientLibrary.Tests/GitInitTests.cs
new file mode 100644
index 0000000000..841d96e422
--- /dev/null
+++ b/main/src/addins/VersionControl/MonoDevelop.VersionControl.Git.ClientLibrary.Tests/MonoDevelop.VersionControl.Git.ClientLibrary.Tests/GitInitTests.cs
@@ -0,0 +1,53 @@
+//
+// GitInitTests.cs
+//
+// Author:
+//       Mike Krüger <mikkrg@microsoft.com>
+//
+// Copyright (c) 2019 Microsoft Corporation. All rights reserved.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+using NUnit.Framework;
+using System.Threading.Tasks;
+using NUnit.Framework.Internal;
+using System.IO;
+using System;
+
+namespace MonoDevelop.VersionControl.Git.ClientLibrary.Tests
+{
+	[TestFixture]
+	public class GitInitTests
+	{
+		[Test]
+		public async Task TestGitInit ()
+		{
+			var path = TestUtil.CreateTempDirectory ();
+			try {
+				var result = await GitInit.InitAsync (path);
+				Assert.IsTrue (result.Success, result.ErrorMessage);
+				Assert.IsTrue (Directory.Exists (path));
+				Assert.IsTrue (Directory.Exists (Path.Combine (path, ".git")));
+			} finally {
+				if (Directory.Exists (path))
+					Directory.Delete (path, true);
+			}
+		}
+	}
+}
diff --git a/main/src/addins/VersionControl/MonoDevelop.VersionControl.Git.ClientLibrary.Tests/MonoDevelop.VersionControl.Git.ClientLibrary.Tests/TestUtil.cs b/main/src/addins/VersionControl/MonoDevelop.VersionControl.Git.ClientLibrary.Tests/MonoDevelop.VersionControl.Git.ClientLibrary.Tests/TestUtil.cs
new file mode 100644
index 0000000000..27d436b4f4
--- /dev/null
+++ b/main/src/addins/VersionControl/MonoDevelop.VersionControl.Git.ClientLibrary.Tests/MonoDevelop.VersionControl.Git.ClientLibrary.Tests/TestUtil.cs
@@ -0,0 +1,48 @@
+//
+// GitInitTests.cs
+//
+// Author:
+//       Mike Krüger <mikkrg@microsoft.com>
+//
+// Copyright (c) 2019 Microsoft Corporation. All rights reserved.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+using System;
+using System.IO;
+
+namespace MonoDevelop.VersionControl.Git.ClientLibrary.Tests
+{
+	static class TestUtil
+	{
+
+		public static string CreateTempDirectory ()
+		{
+			Random rnd = new Random ();
+			string result;
+			while (true) {
+				result = Path.Combine (Path.GetTempPath (), "gitLibTest_" + rnd.Next ());
+				if (!Directory.Exists (result))
+					break;
+			}
+			Directory.CreateDirectory (result);
+			return result;
+		}
+	}
+}
diff --git a/main/src/addins/VersionControl/MonoDevelop.VersionControl.Git.ClientLibrary/MonoDevelop.VersionControl.Git.ClientLibrary.csproj b/main/src/addins/VersionControl/MonoDevelop.VersionControl.Git.ClientLibrary/MonoDevelop.VersionControl.Git.ClientLibrary.csproj
index 25de0877ad..8ed885882a 100644
--- a/main/src/addins/VersionControl/MonoDevelop.VersionControl.Git.ClientLibrary/MonoDevelop.VersionControl.Git.ClientLibrary.csproj
+++ b/main/src/addins/VersionControl/MonoDevelop.VersionControl.Git.ClientLibrary/MonoDevelop.VersionControl.Git.ClientLibrary.csproj
@@ -55,12 +55,20 @@
     <Compile Include="MonoDevelop.VersionControl.Git.ClientLibrary\Status\GitStatusCode.cs" />
     <Compile Include="MonoDevelop.VersionControl.Git.ClientLibrary\Status\GitSubmoduleState.cs" />
     <Compile Include="MonoDevelop.VersionControl.Git.ClientLibrary\Status\GitRenameOrCopyScore.cs" />
+    <Compile Include="MonoDevelop.VersionControl.Git.ClientLibrary\Branches\GitBranch.cs" />
+    <Compile Include="MonoDevelop.VersionControl.Git.ClientLibrary\Branches\GitLocalBranch.cs" />
+    <Compile Include="MonoDevelop.VersionControl.Git.ClientLibrary\Branches\GitReference.cs" />
+    <Compile Include="MonoDevelop.VersionControl.Git.ClientLibrary\Branches\BranchUtil.cs" />
+    <Compile Include="MonoDevelop.VersionControl.Git.ClientLibrary\Branches\GitTag.cs" />
+    <Compile Include="MonoDevelop.VersionControl.Git.ClientLibrary\Init\GitInit.cs" />
   </ItemGroup>
   <ItemGroup>
     <Folder Include="MonoDevelop.VersionControl.Git.ClientLibrary\" />
     <Folder Include="MonoDevelop.VersionControl.Git.ClientLibrary\Clone\" />
     <Folder Include="MonoDevelop.VersionControl.Git.ClientLibrary\Version\" />
     <Folder Include="MonoDevelop.VersionControl.Git.ClientLibrary\Status\" />
+    <Folder Include="MonoDevelop.VersionControl.Git.ClientLibrary\Branches\" />
+    <Folder Include="MonoDevelop.VersionControl.Git.ClientLibrary\Init\" />
   </ItemGroup>
   <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
 </Project>
\ No newline at end of file
diff --git a/main/src/addins/VersionControl/MonoDevelop.VersionControl.Git.ClientLibrary/MonoDevelop.VersionControl.Git.ClientLibrary/Branches/BranchUtil.cs b/main/src/addins/VersionControl/MonoDevelop.VersionControl.Git.ClientLibrary/MonoDevelop.VersionControl.Git.ClientLibrary/Branches/BranchUtil.cs
new file mode 100644
index 0000000000..72ab31c7fa
--- /dev/null
+++ b/main/src/addins/VersionControl/MonoDevelop.VersionControl.Git.ClientLibrary/MonoDevelop.VersionControl.Git.ClientLibrary/Branches/BranchUtil.cs
@@ -0,0 +1,51 @@
+//
+// BranchUtil.cs
+//
+// Author:
+//       Mike Krüger <mikkrg@microsoft.com>
+//
+// Copyright (c) 2019 Microsoft Corporation. All rights reserved.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+using System;
+using System.Threading.Tasks;
+using System.Text;
+using System.Threading;
+using System.Text.RegularExpressions;
+using System.IO;
+
+namespace MonoDevelop.VersionControl.Git.ClientLibrary
+{
+	public static class BranchUtil
+	{
+		public static async Task<GitLocalBranch> GetCurrentBranchAsync (string rootPath, CancellationToken cancellationToken = default)
+		{
+			var handler = new GitOutputTrackerCallbackHandler ();
+			var arguments = new GitArguments (rootPath);
+			arguments.AddArgument ("symbolic-ref");
+			arguments.AddArgument ("--short");
+			arguments.AddArgument ("HEAD");
+			Console.WriteLine (arguments.Arguments);
+			await new GitProcess ().StartAsync (arguments, handler, false, cancellationToken);
+			Console.WriteLine (handler.Output);
+			return new GitLocalBranch (handler.Output.TrimEnd ());
+		}
+	}
+}
diff --git a/main/src/addins/VersionControl/MonoDevelop.VersionControl.Git.ClientLibrary/MonoDevelop.VersionControl.Git.ClientLibrary/Branches/GitBranch.cs b/main/src/addins/VersionControl/MonoDevelop.VersionControl.Git.ClientLibrary/MonoDevelop.VersionControl.Git.ClientLibrary/Branches/GitBranch.cs
new file mode 100644
index 0000000000..0deadeaa03
--- /dev/null
+++ b/main/src/addins/VersionControl/MonoDevelop.VersionControl.Git.ClientLibrary/MonoDevelop.VersionControl.Git.ClientLibrary/Branches/GitBranch.cs
@@ -0,0 +1,42 @@
+//
+// GitBranch.cs
+//
+// Author:
+//       Mike Krüger <mikkrg@microsoft.com>
+//
+// Copyright (c) 2019 Microsoft Corporation. All rights reserved.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+namespace MonoDevelop.VersionControl.Git.ClientLibrary
+{
+	public abstract class GitBranch : GitReference
+	{
+		static readonly string REFS_HEADS_PREFIX = "refs/heads/";
+		static readonly string REFS_REMOTES_PREFIX = "refs/remotes/";
+
+		public abstract bool IsRemote { get; }
+
+		public override string FullName => (IsRemote ? REFS_REMOTES_PREFIX : REFS_HEADS_PREFIX) + Name;
+
+		public GitBranch (string name) : base (name)
+		{
+		}
+	}
+}
diff --git a/main/src/addins/VersionControl/MonoDevelop.VersionControl.Git.ClientLibrary/MonoDevelop.VersionControl.Git.ClientLibrary/Branches/GitLocalBranch.cs b/main/src/addins/VersionControl/MonoDevelop.VersionControl.Git.ClientLibrary/MonoDevelop.VersionControl.Git.ClientLibrary/Branches/GitLocalBranch.cs
new file mode 100644
index 0000000000..0f199ad506
--- /dev/null
+++ b/main/src/addins/VersionControl/MonoDevelop.VersionControl.Git.ClientLibrary/MonoDevelop.VersionControl.Git.ClientLibrary/Branches/GitLocalBranch.cs
@@ -0,0 +1,37 @@
+//
+// GitLocalBranch.cs
+//
+// Author:
+//       Mike Krüger <mikkrg@microsoft.com>
+//
+// Copyright (c) 2019 Microsoft Corporation. All rights reserved.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+namespace MonoDevelop.VersionControl.Git.ClientLibrary
+{
+	public sealed class GitLocalBranch : GitBranch
+	{
+		public override bool IsRemote => false;
+
+		public GitLocalBranch (string name) : base (name)
+		{
+		}
+	}
+}
diff --git a/main/src/addins/VersionControl/MonoDevelop.VersionControl.Git.ClientLibrary/MonoDevelop.VersionControl.Git.ClientLibrary/Branches/GitReference.cs b/main/src/addins/VersionControl/MonoDevelop.VersionControl.Git.ClientLibrary/MonoDevelop.VersionControl.Git.ClientLibrary/Branches/GitReference.cs
new file mode 100644
index 0000000000..dfbab41aae
--- /dev/null
+++ b/main/src/addins/VersionControl/MonoDevelop.VersionControl.Git.ClientLibrary/MonoDevelop.VersionControl.Git.ClientLibrary/Branches/GitReference.cs
@@ -0,0 +1,57 @@
+//
+// GitReference.cs
+//
+// Author:
+//       Mike Krüger <mikkrg@microsoft.com>
+//
+// Copyright (c) 2019 Microsoft Corporation. All rights reserved.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+using System;
+
+namespace MonoDevelop.VersionControl.Git.ClientLibrary
+{
+	/// <summary>
+	/// Base class for named git branches and tags.
+	/// </summary>
+	public abstract class GitReference : IComparable<GitReference>, IEquatable<GitReference>
+	{
+		public string Name { get; private set; }
+
+		public abstract string FullName { get; }
+
+		public GitReference (string name)
+		{
+			Name = name ?? throw new ArgumentNullException (nameof (name));
+		}
+
+		public int CompareTo (GitReference other)
+			=> other == null ? 1 : string.Compare(FullName, other.FullName, StringComparison.Ordinal);
+
+		public bool Equals (GitReference other)
+		{
+			if (other == this)
+				return true;
+			if (other == null || other.GetType () != GetType ())
+				return false;
+			return Name.Equals (other.Name);
+		}
+	}
+
+}
diff --git a/main/src/addins/VersionControl/MonoDevelop.VersionControl.Git.ClientLibrary/MonoDevelop.VersionControl.Git.ClientLibrary/Branches/GitTag.cs b/main/src/addins/VersionControl/MonoDevelop.VersionControl.Git.ClientLibrary/MonoDevelop.VersionControl.Git.ClientLibrary/Branches/GitTag.cs
new file mode 100644
index 0000000000..e9a1a5d64a
--- /dev/null
+++ b/main/src/addins/VersionControl/MonoDevelop.VersionControl.Git.ClientLibrary/MonoDevelop.VersionControl.Git.ClientLibrary/Branches/GitTag.cs
@@ -0,0 +1,39 @@
+//
+// GitTag.cs
+//
+// Author:
+//       Mike Krüger <mikkrg@microsoft.com>
+//
+// Copyright (c) 2019 Microsoft Corporation. All rights reserved.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+namespace MonoDevelop.VersionControl.Git.ClientLibrary
+{
+	public class GitTag : GitReference
+	{
+		public static readonly string REFS_TAGS_PREFIX = "refs/tags/";
+
+		public override string FullName => REFS_TAGS_PREFIX + Name;
+
+		public GitTag (string name) : base (name)
+		{
+		}
+	}
+}
diff --git a/main/src/addins/VersionControl/MonoDevelop.VersionControl.Git.ClientLibrary/MonoDevelop.VersionControl.Git.ClientLibrary/GitProcess.cs b/main/src/addins/VersionControl/MonoDevelop.VersionControl.Git.ClientLibrary/MonoDevelop.VersionControl.Git.ClientLibrary/GitProcess.cs
index aec694bccb..0a260430e5 100644
--- a/main/src/addins/VersionControl/MonoDevelop.VersionControl.Git.ClientLibrary/MonoDevelop.VersionControl.Git.ClientLibrary/GitProcess.cs
+++ b/main/src/addins/VersionControl/MonoDevelop.VersionControl.Git.ClientLibrary/MonoDevelop.VersionControl.Git.ClientLibrary/GitProcess.cs
@@ -119,66 +119,68 @@ namespace MonoDevelop.VersionControl.Git.ClientLibrary
 				throw new ArgumentNullException (nameof (arguments));
 			if (callbackHandler is null)
 				throw new ArgumentNullException (nameof (callbackHandler));
-
-
 			return (askPass ? exclusiveOperationFactory : concurrentOperationFactory).StartNew (delegate {
-				try {
-					this.callbacks = callbackHandler;
-					var startInfo = new ProcessStartInfo ("git");
-					startInfo.WorkingDirectory = arguments.GitRootPath;
-					startInfo.RedirectStandardError = true;
-					startInfo.RedirectStandardOutput = true;
-					startInfo.UseShellExecute = false;
-					startInfo.Arguments = arguments.Arguments;
+				return StartProcess (arguments, callbackHandler, askPass,  cancellationToken);
+			}, cancellationToken);
+		}
 
-					if (askPass) {
-						var passApp = Path.Combine (Path.GetDirectoryName (typeof (GitProcess).Assembly.Location), "GitAskPass");
-						startInfo.EnvironmentVariables.Add ("GIT_ASKPASS", passApp);
-						startInfo.EnvironmentVariables.Add ("SSH_ASKPASS", passApp);
-						startInfo.EnvironmentVariables.Add ("MONODEVELOP_GIT_ASKPASS_PIPE", pipe);
-						server = new NamedPipeServerStream (pipe);
-					}
+		GitResult StartProcess (GitArguments arguments, AbstractGitCallbackHandler callbackHandler, bool askPass, CancellationToken cancellationToken)
+		{
+			try {
+				this.callbacks = callbackHandler;
+				var startInfo = new ProcessStartInfo ("git") {
+					WorkingDirectory = arguments.GitRootPath,
+					RedirectStandardError = true,
+					RedirectStandardOutput = true,
+					UseShellExecute = false,
+					Arguments = arguments.Arguments
+				};
 
-					process = Process.Start (startInfo);
-					process.OutputDataReceived += (sender, e) => {
-						if (cancellationToken.IsCancellationRequested) {
-							SafeKillProcess ();
-							cancellationToken.ThrowIfCancellationRequested ();
-						}
-						if (e?.Data == null)
-							return;
+				if (askPass) {
+					var passApp = Path.Combine (Path.GetDirectoryName (typeof (GitProcess).Assembly.Location), "GitAskPass");
+					startInfo.EnvironmentVariables.Add ("GIT_ASKPASS", passApp);
+					startInfo.EnvironmentVariables.Add ("SSH_ASKPASS", passApp);
+					startInfo.EnvironmentVariables.Add ("MONODEVELOP_GIT_ASKPASS_PIPE", pipe);
+					server = new NamedPipeServerStream (pipe);
+				}
+				process = Process.Start (startInfo);
+				process.OutputDataReceived += (sender, e) => {
+					if (cancellationToken.IsCancellationRequested) {
+						SafeKillProcess ();
+						cancellationToken.ThrowIfCancellationRequested ();
+					}
+					if (e?.Data == null)
+						return;
+					if (arguments.TrackProgress && ProgressParser.ParseProgress (e.Data, callbackHandler))
+						return;
+					callbackHandler.OnOutput (e.Data);
+				};
+				process.ErrorDataReceived += (sender, e) => {
+					if (cancellationToken.IsCancellationRequested) {
+						SafeKillProcess ();
+						cancellationToken.ThrowIfCancellationRequested ();
+					}
+					if (e?.Data == null)
+						return;
+					if (IsError (e.Data)) {
+						errorText.AppendLine (e.Data);
+					} else {
 						if (arguments.TrackProgress && ProgressParser.ParseProgress (e.Data, callbackHandler))
 							return;
 						callbackHandler.OnOutput (e.Data);
-					};
-					process.ErrorDataReceived += (sender, e) => {
-						if (cancellationToken.IsCancellationRequested) {
-							SafeKillProcess ();
-							cancellationToken.ThrowIfCancellationRequested ();
-						}
-						if (e?.Data == null)
-							return;
-						if (IsError (e.Data)) {
-							errorText.AppendLine (e.Data);
-						} else {
-							if (arguments.TrackProgress && ProgressParser.ParseProgress (e.Data, callbackHandler))
-								return;
-							callbackHandler.OnOutput (e.Data);
-						}
-					};
-					if (!process.Start ())
-						throw new InvalidOperationException ("Can't start git process.");
-					process.BeginOutputReadLine ();
-					process.BeginErrorReadLine ();
-					cancellationToken.Register (SafeKillProcess);
-					if (askPass)
-						server.BeginWaitForConnection (HandleAsyncCallback, server);
-					process.WaitForExit ();
-				} finally {
-					SafeKillProcess ();
-				}
-				return new GitResult { Success = process.ExitCode == 0, ExitCode = process.ExitCode, ErrorMessage = errorText.ToString () };
-			}, cancellationToken);
+					}
+				};
+				process.BeginOutputReadLine ();
+				process.BeginErrorReadLine ();
+				cancellationToken.Register (SafeKillProcess);
+				if (askPass)
+				server.BeginWaitForConnection (HandleAsyncCallback, server);
+
+				process.WaitForExit ();
+			} finally {
+				SafeKillProcess ();
+			}
+			return new GitResult { Success = process.ExitCode == 0, ExitCode = process.ExitCode, ErrorMessage = errorText.ToString () };
 		}
 
 		void SafeKillProcess ()
diff --git a/main/src/addins/VersionControl/MonoDevelop.VersionControl.Git.ClientLibrary/MonoDevelop.VersionControl.Git.ClientLibrary/Init/GitInit.cs b/main/src/addins/VersionControl/MonoDevelop.VersionControl.Git.ClientLibrary/MonoDevelop.VersionControl.Git.ClientLibrary/Init/GitInit.cs
new file mode 100644
index 0000000000..9d29f51136
--- /dev/null
+++ b/main/src/addins/VersionControl/MonoDevelop.VersionControl.Git.ClientLibrary/MonoDevelop.VersionControl.Git.ClientLibrary/Init/GitInit.cs
@@ -0,0 +1,55 @@
+//
+// GitInit.cs
+//
+// Author:
+//       Mike Krüger <mikkrg@microsoft.com>
+//
+// Copyright (c) 2019 Microsoft Corporation. All rights reserved.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+using System;
+using System.Threading;
+using System.Threading.Tasks;
+using System.IO;
+
+namespace MonoDevelop.VersionControl.Git.ClientLibrary
+{
+	public static class GitInit
+	{
+		/// <summary>
+		/// Creates an empty Git repository
+		/// </summary>
+		/// <param name="rootPath">The directory to create the repository in. If this directory does not exist, it will be created.</param>
+		/// <param name="bare">If true, create a bare repository. </param>
+		public static async Task<GitResult> InitAsync (string rootPath, bool bare = false, CancellationToken cancellationToken = default)
+		{
+			var handler = new GitOutputTrackerCallbackHandler ();
+			if (!Directory.Exists (rootPath)) {
+				Directory.CreateDirectory (rootPath);
+			}
+			var arguments = new GitArguments (".");
+			arguments.AddArgument ("init");
+			if (bare)
+				arguments.AddArgument ("--bare");
+			arguments.AddArgument (rootPath);
+			return await new GitProcess ().StartAsync (arguments, handler, false, cancellationToken);
+		}
+	}
+}