Add an option to set initial head to InitOptions

Author: Alexander Ovchinnikov

LibGit2Sharp/Core/GitRepositoryInitOptions.cs

@@ -36,13 +36,21 @@ public static GitRepositoryInitOptions BuildFrom(InitOptions initOptions)
                 opts.Flags |= GitRepositoryInitFlags.GIT_REPOSITORY_INIT_BARE;
             }
 
+            if (initOptions.InitialHead != null)
+            {
+                opts.InitialHead = StrictUtf8Marshaler.FromManaged(initOptions.InitialHead);
+            }
+
             return opts;
         }
 
         public void Dispose()
         {
             EncodingMarshaler.Cleanup(WorkDirPath);
             WorkDirPath = IntPtr.Zero;
+
+            EncodingMarshaler.Cleanup(InitialHead);
+            InitialHead = IntPtr.Zero;
         }
     }
 

LibGit2Sharp/InitOptions.cs

@@ -11,12 +11,14 @@ public sealed class InitOptions
         ///   Default behavior:
         ///     The workdirPath is null.
         ///     Not a bare repository.
+        ///     Default initial head.
         /// </para>
         /// </summary>
         public InitOptions()
         {
             WorkdirPath = null;
             IsBare = false;
+            InitialHead = null;
         }
 
         /// <summary>
@@ -28,5 +30,12 @@ public InitOptions()
         /// True to initialize a bare repository. False otherwise, to initialize a standard ".git" repository.
         /// </summary>
         public bool IsBare { get; set; }
+
+        /// <summary>
+        /// The name of the head to point HEAD at.
+        /// If null, then this will be treated as "master" and the HEAD ref will be set to "refs/heads/master".
+        /// If this begins with "refs/" it will be used verbatim; otherwise "refs/heads/" will be prefixed.
+        /// </summary>
+        public string InitialHead { get; set; }
     }
 }