Add Repository.Version static property

This property returns a string containing the LibGit2Sharp version number, the commit hash it's been built against (if available), the libgit2 commit hash and the processor architecture.

5 files changed, 62 insertions, 2 deletions

diff --git a/LibGit2Sharp/Core/NativeMethods.cs b/LibGit2Sharp/Core/NativeMethods.cs
index a9864750..9778d306 100644
--- a/LibGit2Sharp/Core/NativeMethods.cs
+++ b/LibGit2Sharp/Core/NativeMethods.cs
@@ -18,8 +18,7 @@ namespace LibGit2Sharp.Core
             {
                 string originalAssemblypath = new Uri(Assembly.GetExecutingAssembly().CodeBase).LocalPath;
 
-                //TODO: When amd64 version of libgit2.dll is available, value this depending of the size of an IntPtr
-                const string currentArchSubPath = "NativeBinaries/x86";
+                string currentArchSubPath = "NativeBinaries/" + ProcessorArchitecture;
 
                 string path = Path.Combine(Path.GetDirectoryName(originalAssemblypath), currentArchSubPath);
 
@@ -37,6 +36,19 @@ namespace LibGit2Sharp.Core
             git_threads_shutdown();
         }
 
+        public static string ProcessorArchitecture
+        {
+            get
+            {
+                //TODO: When amd64 version of libgit2.dll is available, uncomment the following lines
+                //if (IntPtr.Size == 8)
+                //{
+                //    return "amd64";
+                //}
+
+                return "x86";
+            }
+        }
         private static bool IsRunningOnLinux()
         {
             // see http://mono-project.com/FAQ%3a_Technical#Mono_Platforms
diff --git a/LibGit2Sharp/LibGit2Sharp.csproj b/LibGit2Sharp/LibGit2Sharp.csproj
index 3f3b2a23..042125cc 100644
--- a/LibGit2Sharp/LibGit2Sharp.csproj
+++ b/LibGit2Sharp/LibGit2Sharp.csproj
@@ -132,6 +132,12 @@
   <ItemGroup>
     <CodeAnalysisDictionary Include="CustomDictionary.xml" />
   </ItemGroup>
+  <ItemGroup>
+    <EmbeddedResource Include="libgit2_hash.txt" />
+  </ItemGroup>
+  <ItemGroup>
+    <EmbeddedResource Include="libgit2sharp_hash.txt" />
+  </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
   <PropertyGroup>
     <PreBuildEvent>
diff --git a/LibGit2Sharp/Repository.cs b/LibGit2Sharp/Repository.cs
index b2c35db3..e44f1d06 100644
--- a/LibGit2Sharp/Repository.cs
+++ b/LibGit2Sharp/Repository.cs
@@ -1,5 +1,7 @@
 using System;
 using System.Collections.Generic;
+using System.IO;
+using System.Reflection;
 using LibGit2Sharp.Core;
 using LibGit2Sharp.Core.Compat;
 using LibGit2Sharp.Core.Handles;
@@ -22,6 +24,7 @@ namespace LibGit2Sharp
         private readonly Lazy<RepositoryInformation> info;
         private readonly bool isBare;
         private readonly List<SafeHandleBase> handlesToCleanup = new List<SafeHandleBase>();
+        private static readonly Lazy<string> versionRetriever = new Lazy<string>(RetrieveVersion);
 
         /// <summary>
         ///   Initializes a new instance of the <see cref = "Repository" /> class.
@@ -356,5 +359,42 @@ namespace LibGit2Sharp
         {
             handlesToCleanup.Add(handleToCleanup);
         }
+
+        /// <summary>
+        ///   Gets the current LibGit2Sharp version.
+        ///   <para>
+        ///     The format of the version number is as follows:
+        ///     <para>Major.Minor.Patch-LibGit2Sharp_abbrev_hash-libgit2_abbrev_hash (x86|amd64)</para>
+        ///   </para>
+        /// </summary>
+        public static string Version
+        {
+            get { return versionRetriever.Value; }
+        }
+
+        private static string RetrieveVersion()
+        {
+            Assembly assembly = typeof(Repository).Assembly;
+
+            Version version = assembly.GetName().Version;
+            
+            string libgit2Hash = ReadContentFromResource(assembly, "libgit2_hash.txt");
+            string libgit2sharpHash = ReadContentFromResource(assembly, "libgit2sharp_hash.txt");
+
+            return string.Format("{0}-{1}-{2} ({3})", 
+                version.ToString(3),
+                libgit2sharpHash.Substring(0, 7),
+                libgit2Hash.Substring(0,7),
+                NativeMethods.ProcessorArchitecture
+                );
+        }
+
+        private static string ReadContentFromResource(Assembly assembly, string partialResourceName)
+        {
+            using (var sr = new StreamReader(assembly.GetManifestResourceStream(string.Format("LibGit2Sharp.{0}", partialResourceName))))
+            {
+                return sr.ReadLine();
+            }
+        }
     }
 }
diff --git a/LibGit2Sharp/libgit2_hash.txt b/LibGit2Sharp/libgit2_hash.txt
new file mode 100644
index 00000000..dab8956f
--- /dev/null
+++ b/LibGit2Sharp/libgit2_hash.txt
@@ -0,0 +1 @@
+a17e882fab4e190d5a052cbc9cf6a238a9166a7c
diff --git a/LibGit2Sharp/libgit2sharp_hash.txt b/LibGit2Sharp/libgit2sharp_hash.txt
new file mode 100644
index 00000000..0faec602
--- /dev/null
+++ b/LibGit2Sharp/libgit2sharp_hash.txt
@@ -0,0 +1 @@
+unknown