Make GitDirFinder.TreeWalkForGitDir() leverage Repository.Discover()

GitFlowVersion/GitDirFinder.cs

@@ -1,26 +1,20 @@
 namespace GitFlowVersion
 {
     using System.IO;
+    using LibGit2Sharp;
 
     public class GitDirFinder
     {
 
         public static string TreeWalkForGitDir(string currentDirectory)
         {
-            while (true)
+            string gitDir = Repository.Discover(currentDirectory);
+
+            if (gitDir != null)
             {
-                var gitDir = Path.Combine(currentDirectory, @".git");
-                if (Directory.Exists(gitDir))
-                {
-                    return gitDir;
-                }
-                var parent = Directory.GetParent(currentDirectory);
-                if (parent == null)
-                {
-                    break;
-                }
-                currentDirectory = parent.FullName;
+                return gitDir.TrimEnd(new []{ Path.DirectorySeparatorChar });
             }
+
             return null;
         }
     }

Tests/GitDirFinderTests.cs

@@ -0,0 +1,55 @@
+using System;
+using System.IO;
+using GitFlowVersion;
+using LibGit2Sharp;
+using NUnit.Framework;
+
+[TestFixture]
+public class GitDirFinderTests
+{
+    private string workDir;
+    private string gitDir;
+
+    [SetUp]
+    public void CreateTemporaryRepository()
+    {
+        workDir = Path.Combine(Path.GetTempPath(), Guid.NewGuid().ToString());
+
+        gitDir = Repository.Init(workDir)
+                        .TrimEnd(new[] { Path.DirectorySeparatorChar });
+
+        Assert.NotNull(gitDir);
+    }
+
+    [TearDown]
+    public void Cleanup()
+    {
+        Directory.Delete(workDir, true);
+    }
+
+    [Test]
+    public void From_Workdir()
+    {
+        Assert.AreEqual(gitDir, GitDirFinder.TreeWalkForGitDir(workDir));
+    }
+
+    [Test]
+    public void From_Workdir_Parent()
+    {
+        string parentDir = Directory.GetParent(workDir).FullName;
+        Assert.Null(GitDirFinder.TreeWalkForGitDir(parentDir));
+    }
+
+    [Test]
+    public void From_GitDir()
+    {
+        Assert.AreEqual(gitDir, GitDirFinder.TreeWalkForGitDir(gitDir));
+    }
+
+    [Test]
+    public void From_RefsDir()
+    {
+        string refsDir = Path.Combine(gitDir, "refs");
+        Assert.AreEqual(gitDir, GitDirFinder.TreeWalkForGitDir(refsDir));
+    }
+}

Tests/Tests.csproj

@@ -86,6 +86,7 @@
     <Compile Include="AssemblyLocation.cs" />
     <Compile Include="BranchClassifierTests.cs" />
     <Compile Include="BranchFinders\DevelopTests.cs" />
+    <Compile Include="GitDirFinderTests.cs" />
     <Compile Include="NugetVersionBuilderTests.cs" />
     <Compile Include="SemanticVersionParserTests.cs" />
     <Compile Include="ShortVersionParserTests.cs" />