Added SubmoduleUpdateOptions to rebase options.

Author: igadmg

Diff for: LibGit2Sharp/Rebase.cs

@@ -119,7 +119,7 @@ public virtual RebaseResult Start(Branch branch, Branch upstream, Branch onto, I
                                                                                       ontoRefAnnotatedCommitHandle,
                                                                                       gitRebaseOptions))
                 {
-                    this.repository.Submodules.UpdateAll(new SubmoduleUpdateOptions());
+                    this.repository.Submodules.UpdateAll(options.SubmoduleUpdateOptions);
 
                     RebaseResult rebaseResult = RebaseOperationImpl.Run(rebaseOperationHandle,
                                                                         this.repository,

Diff for: LibGit2Sharp/RebaseOptions.cs

@@ -41,6 +41,11 @@ public sealed class RebaseOptions : IConvertableToGitCheckoutOpts
         /// </summary>
         public CheckoutFileConflictStrategy FileConflictStrategy { get; set; }
 
+        /// <summary>
+        /// Submodule update options passed to submodule updates on rtebase step.
+        /// </summary>
+        public SubmoduleUpdateOptions SubmoduleUpdateOptions { get; set; }
+
         CheckoutCallbacks IConvertableToGitCheckoutOpts.GenerateCallbacks()
         {
             return CheckoutCallbacks.From(OnCheckoutProgress, OnCheckoutNotify);

Diff for: LibGit2Sharp/SubmoduleCollection.cs

@@ -73,6 +73,8 @@ public virtual void Init(string name, bool overwrite)
 
         public virtual void UpdateAll(SubmoduleUpdateOptions options)
         {
+            options = options ?? new SubmoduleUpdateOptions();
+
             foreach (var sm in this)
                 Update(sm.Name, options);
         }