Add Repository.ObjectDatabase.CreateCommit()

Partially fixes #127.

1 files changed, 43 insertions, 0 deletions

diff --git a/LibGit2Sharp/ObjectDatabase.cs b/LibGit2Sharp/ObjectDatabase.cs
index 1a430440..dfaf565d 100644
--- a/LibGit2Sharp/ObjectDatabase.cs
+++ b/LibGit2Sharp/ObjectDatabase.cs
@@ -1,4 +1,6 @@
 using System;
+using System.Collections.Generic;
+using System.Linq;
 using LibGit2Sharp.Core;
 using LibGit2Sharp.Core.Handles;
 
@@ -59,5 +61,46 @@ namespace LibGit2Sharp
         {
             return treeDefinition.Build(repo);
         }
+
+        /// <summary>
+        ///   Inserts a <see cref = "Commit"/> into the object database, referencing an existing <see cref = "Tree"/>.
+        /// </summary>
+        /// <param name = "message">The description of why a change was made to the repository.</param>
+        /// <param name = "author">The <see cref = "Signature" /> of who made the change.</param>
+        /// <param name = "committer">The <see cref = "Signature" /> of who added the change to the repository.</param>
+        /// <param name = "tree">The <see cref = "Tree"/> of the <see cref = "Commit"/> to be created.</param>
+        /// <param name = "parents">The parents of the <see cref = "Commit"/> to be created.</param>
+        /// <returns>The created <see cref = "Commit"/>.</returns>
+        public Commit CreateCommit(string message, Signature author, Signature committer, Tree tree, IEnumerable<Commit> parents)
+        {
+            return CreateCommit(message, author, committer, tree, parents, null);
+        }
+
+        internal Commit CreateCommit(string message, Signature author, Signature committer, Tree tree, IEnumerable<Commit> parents, string referenceName)
+        {
+            Ensure.ArgumentNotNull(message, "message");
+            Ensure.ArgumentNotNull(author, "author");
+            Ensure.ArgumentNotNull(committer, "committer");
+            Ensure.ArgumentNotNull(tree, "tree");
+            Ensure.ArgumentNotNull(parents, "parents");
+
+            IEnumerable<ObjectId> parentIds = parents.Select(p => p.Id);
+
+            GitOid commitOid;
+            using (var treePtr = new ObjectSafeWrapper(tree.Id, repo))
+            using (var parentObjectPtrs = new DisposableEnumerable<ObjectSafeWrapper>(parentIds.Select(id => new ObjectSafeWrapper(id, repo))))
+            using (SignatureSafeHandle authorHandle = author.BuildHandle())
+            using (SignatureSafeHandle committerHandle = committer.BuildHandle())
+            {
+                string encoding = null; //TODO: Handle the encoding of the commit to be created
+
+                IntPtr[] parentsPtrs = parentObjectPtrs.Select(o => o.ObjectPtr.DangerousGetHandle()).ToArray();
+                int res = NativeMethods.git_commit_create(out commitOid, repo.Handle, referenceName, authorHandle,
+                                                      committerHandle, encoding, message, treePtr.ObjectPtr, parentObjectPtrs.Count(), parentsPtrs);
+                Ensure.Success(res);
+            }
+
+            return repo.Lookup<Commit>(new ObjectId(commitOid));
+        }
     }
 }