Add ignore_whitespace_change field to CommitDiffRequest message

diff.proto

@@ -13,6 +13,7 @@ message CommitDiffRequest {
   Repository repository = 1;
   string left_commit_id = 2;
   string right_commit_id = 3;
+  bool ignore_whitespace_change = 4;
 }
 // A CommitDiffResponse corresponds to a single changed file in a commit.

go/diff.pb.go

@@ -19,9 +19,10 @@ var _ = fmt.Errorf
 var _ = math.Inf
 type CommitDiffRequest struct {
-	Repository    *Repository `protobuf:"bytes,1,opt,name=repository" json:"repository,omitempty"`
-	LeftCommitId  string      `protobuf:"bytes,2,opt,name=left_commit_id,json=leftCommitId" json:"left_commit_id,omitempty"`
-	RightCommitId string      `protobuf:"bytes,3,opt,name=right_commit_id,json=rightCommitId" json:"right_commit_id,omitempty"`
+	Repository             *Repository `protobuf:"bytes,1,opt,name=repository" json:"repository,omitempty"`
+	LeftCommitId           string      `protobuf:"bytes,2,opt,name=left_commit_id,json=leftCommitId" json:"left_commit_id,omitempty"`
+	RightCommitId          string      `protobuf:"bytes,3,opt,name=right_commit_id,json=rightCommitId" json:"right_commit_id,omitempty"`
+	IgnoreWhitespaceChange bool        `protobuf:"varint,4,opt,name=ignore_whitespace_change,json=ignoreWhitespaceChange" json:"ignore_whitespace_change,omitempty"`
 }
 func (m *CommitDiffRequest) Reset()                    { *m = CommitDiffRequest{} }
@@ -50,6 +51,13 @@ func (m *CommitDiffRequest) GetRightCommitId() string {
 	return ""
 }
+func (m *CommitDiffRequest) GetIgnoreWhitespaceChange() bool {
+	if m != nil {
+		return m.IgnoreWhitespaceChange
+	}
+	return false
+}
+
 // A CommitDiffResponse corresponds to a single changed file in a commit.
 type CommitDiffResponse struct {
 	FromPath []byte `protobuf:"bytes,1,opt,name=from_path,json=fromPath,proto3" json:"from_path,omitempty"`
@@ -233,26 +241,28 @@ var _Diff_serviceDesc = grpc.ServiceDesc{
 func init() { proto.RegisterFile("diff.proto", fileDescriptor1) }
 var fileDescriptor1 = []byte{
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+	// 363 bytes of a gzipped FileDescriptorProto
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 }

ruby/lib/gitaly/diff_pb.rb

@@ -9,6 +9,7 @@ Google::Protobuf::DescriptorPool.generated_pool.build do
     optional :repository, :message, 1, "gitaly.Repository"
     optional :left_commit_id, :string, 2
     optional :right_commit_id, :string, 3
+    optional :ignore_whitespace_change, :bool, 4
   end
   add_message "gitaly.CommitDiffResponse" do
     optional :from_path, :bytes, 1