Added an option to choose if commit message is prettified or not

Prettifing the message includes:
* Removing empty lines from the beginning and end.
* Removing trailing spaces from every line.
* Turning multiple consecutive empty lines between paragraphs into just one empty line.
* Ensuring the commit message ends with a newline.
* Removing every line starting with "#".

Note that this has nothing to do with the core.autocrlf option.

Author: amibar

LibGit2Sharp/Core/HistoryRewriter.cs

@@ -222,8 +222,11 @@ private void RewriteCommit(Commit commit)
                 return;
             }
 
-            var newCommit = repo.ObjectDatabase.CreateCommit(newHeader.Message, newHeader.Author,
-                                                             newHeader.Committer, newTree,
+            var newCommit = repo.ObjectDatabase.CreateCommit(newHeader.Author,
+                                                             newHeader.Committer,
+                                                             newHeader.Message, 
+                                                             true,
+                                                             newTree,
                                                              mappedNewParents);
 
             // Record the rewrite

LibGit2Sharp/Core/Proxy.cs

@@ -316,7 +316,7 @@ public static ObjectId git_commit_create(
             string referenceName,
             Signature author,
             Signature committer,
-            string prettifiedMessage,
+            string message,
             Tree tree,
             GitOid[] parentIds)
         {
@@ -331,7 +331,7 @@ public static ObjectId git_commit_create(
 
                 int res = NativeMethods.git_commit_create_from_oids(
                     out commitOid, repo, referenceName, authorHandle,
-                    committerHandle, null, prettifiedMessage,
+                    committerHandle, null, message,
                     ref treeOid, parentPtrs.Count, parentPtrs.ToArray());
 
                 Ensure.ZeroResult(res);

LibGit2Sharp/ObjectDatabase.cs

@@ -191,12 +191,36 @@ public virtual Tree CreateTree(TreeDefinition treeDefinition)
         /// <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>
+        [Obsolete]
         public virtual Commit CreateCommit(string message, Signature author, Signature committer, Tree tree, IEnumerable<Commit> parents)
         {
-            return CreateCommit(message, author, committer, tree, parents, null);
+            return CreateCommit(author, committer, message, true, tree, parents, null);
         }
 
-        internal Commit CreateCommit(string message, Signature author, Signature committer, Tree tree, IEnumerable<Commit> parents, string referenceName)
+        /// <summary>
+        /// Inserts a <see cref="Commit"/> into the object database, referencing an existing <see cref="Tree"/>.
+        /// </summary>
+        /// <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="message">The description of why a change was made to the repository.</param>
+        /// <param name="prettifyMessage">True to prettify the message, or false to leave it as is</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>
+        /// <para>
+        /// Prettifing the message includes:
+        /// * Removing empty lines from the beginning and end.
+        /// * Removing trailing spaces from every line.
+        /// * Turning multiple consecutive empty lines between paragraphs into just one empty line.
+        /// * Ensuring the commit message ends with a newline.
+        /// * Removing every line starting with "#".
+        /// </para>
+        public virtual Commit CreateCommit(Signature author, Signature committer, string message, bool prettifyMessage, Tree tree, IEnumerable<Commit> parents)
+        {
+            return CreateCommit(author, committer, message, prettifyMessage, tree, parents, null);
+        }
+
+        internal Commit CreateCommit(Signature author, Signature committer, string message, bool prettifyMessage, Tree tree, IEnumerable<Commit> parents, string referenceName)
         {
             Ensure.ArgumentNotNull(message, "message");
             Ensure.ArgumentDoesNotContainZeroByte(message, "message");
@@ -205,10 +229,13 @@ internal Commit CreateCommit(string message, Signature author, Signature committ
             Ensure.ArgumentNotNull(tree, "tree");
             Ensure.ArgumentNotNull(parents, "parents");
 
-            string prettifiedMessage = Proxy.git_message_prettify(message);
+            if (prettifyMessage)
+            {
+                message = Proxy.git_message_prettify(message);
+            }
             GitOid[] parentIds = parents.Select(p => p.Id.Oid).ToArray();
 
-            ObjectId commitId = Proxy.git_commit_create(repo.Handle, referenceName, author, committer, prettifiedMessage, tree, parentIds);
+            ObjectId commitId = Proxy.git_commit_create(repo.Handle, referenceName, author, committer, message, tree, parentIds);
 
             return repo.Lookup<Commit>(commitId);
         }

LibGit2Sharp/Repository.cs

@@ -880,7 +880,7 @@ public Commit Commit(string message, Signature author, Signature committer, bool
 
             var parents = RetrieveParentsOfTheCommitBeingCreated(amendPreviousCommit);
 
-            Commit result = ObjectDatabase.CreateCommit(message, author, committer, tree, parents, "HEAD");
+            Commit result = ObjectDatabase.CreateCommit(author, committer, message, true, tree, parents, "HEAD");
 
             Proxy.git_repository_state_cleanup(handle);
 

LibGit2Sharp/libgit2sharp_hash.txt

@@ -1 +1 @@
-unknown
+61e8add29c12bd4a56b84af6ddac318e1778ea50