afdo: Add proto support for auto-committing builder commits

Implement proto changes for go/cros-recipe-builder-commits

BUG=chromium:1081332
TEST=generate

Change-Id: Ied3319c4bc00c1f4c538e685847d6694bf162c36
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/infra/proto/+/2628186
Reviewed-by: LaMont Jones <lamontjones@chromium.org>
Commit-Queue: LaMont Jones <lamontjones@chromium.org>
Auto-Submit: Tiancong Wang <tcwang@google.com>
diff --git a/go/chromite/api/toolchain.pb.go b/go/chromite/api/toolchain.pb.go
index 1df86fa..91de6b9 100644
--- a/go/chromite/api/toolchain.pb.go
+++ b/go/chromite/api/toolchain.pb.go
@@ -373,6 +373,359 @@
 	return nil
 }
 
+type GetUpdatedFilesRequest struct {
+	UploadedArtifacts    []*GetUpdatedFilesRequest_UploadedArtifacts `protobuf:"bytes,1,rep,name=uploaded_artifacts,json=uploadedArtifacts,proto3" json:"uploaded_artifacts,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}                                    `json:"-"`
+	XXX_unrecognized     []byte                                      `json:"-"`
+	XXX_sizecache        int32                                       `json:"-"`
+}
+
+func (m *GetUpdatedFilesRequest) Reset()         { *m = GetUpdatedFilesRequest{} }
+func (m *GetUpdatedFilesRequest) String() string { return proto.CompactTextString(m) }
+func (*GetUpdatedFilesRequest) ProtoMessage()    {}
+func (*GetUpdatedFilesRequest) Descriptor() ([]byte, []int) {
+	return fileDescriptor_7ff43bdb7436d394, []int{5}
+}
+
+func (m *GetUpdatedFilesRequest) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_GetUpdatedFilesRequest.Unmarshal(m, b)
+}
+func (m *GetUpdatedFilesRequest) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_GetUpdatedFilesRequest.Marshal(b, m, deterministic)
+}
+func (m *GetUpdatedFilesRequest) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_GetUpdatedFilesRequest.Merge(m, src)
+}
+func (m *GetUpdatedFilesRequest) XXX_Size() int {
+	return xxx_messageInfo_GetUpdatedFilesRequest.Size(m)
+}
+func (m *GetUpdatedFilesRequest) XXX_DiscardUnknown() {
+	xxx_messageInfo_GetUpdatedFilesRequest.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_GetUpdatedFilesRequest proto.InternalMessageInfo
+
+func (m *GetUpdatedFilesRequest) GetUploadedArtifacts() []*GetUpdatedFilesRequest_UploadedArtifacts {
+	if m != nil {
+		return m.UploadedArtifacts
+	}
+	return nil
+}
+
+// We need the artifact info from BundleResponse and the profile info
+// as the input of the request.
+type GetUpdatedFilesRequest_UploadedArtifacts struct {
+	ArtifactInfo         *ArtifactInfo                   `protobuf:"bytes,1,opt,name=artifact_info,json=artifactInfo,proto3" json:"artifact_info,omitempty"`
+	ProfileInfo          *chromiumos.ArtifactProfileInfo `protobuf:"bytes,2,opt,name=profile_info,json=profileInfo,proto3" json:"profile_info,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}                        `json:"-"`
+	XXX_unrecognized     []byte                          `json:"-"`
+	XXX_sizecache        int32                           `json:"-"`
+}
+
+func (m *GetUpdatedFilesRequest_UploadedArtifacts) Reset() {
+	*m = GetUpdatedFilesRequest_UploadedArtifacts{}
+}
+func (m *GetUpdatedFilesRequest_UploadedArtifacts) String() string { return proto.CompactTextString(m) }
+func (*GetUpdatedFilesRequest_UploadedArtifacts) ProtoMessage()    {}
+func (*GetUpdatedFilesRequest_UploadedArtifacts) Descriptor() ([]byte, []int) {
+	return fileDescriptor_7ff43bdb7436d394, []int{5, 0}
+}
+
+func (m *GetUpdatedFilesRequest_UploadedArtifacts) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_GetUpdatedFilesRequest_UploadedArtifacts.Unmarshal(m, b)
+}
+func (m *GetUpdatedFilesRequest_UploadedArtifacts) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_GetUpdatedFilesRequest_UploadedArtifacts.Marshal(b, m, deterministic)
+}
+func (m *GetUpdatedFilesRequest_UploadedArtifacts) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_GetUpdatedFilesRequest_UploadedArtifacts.Merge(m, src)
+}
+func (m *GetUpdatedFilesRequest_UploadedArtifacts) XXX_Size() int {
+	return xxx_messageInfo_GetUpdatedFilesRequest_UploadedArtifacts.Size(m)
+}
+func (m *GetUpdatedFilesRequest_UploadedArtifacts) XXX_DiscardUnknown() {
+	xxx_messageInfo_GetUpdatedFilesRequest_UploadedArtifacts.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_GetUpdatedFilesRequest_UploadedArtifacts proto.InternalMessageInfo
+
+func (m *GetUpdatedFilesRequest_UploadedArtifacts) GetArtifactInfo() *ArtifactInfo {
+	if m != nil {
+		return m.ArtifactInfo
+	}
+	return nil
+}
+
+func (m *GetUpdatedFilesRequest_UploadedArtifacts) GetProfileInfo() *chromiumos.ArtifactProfileInfo {
+	if m != nil {
+		return m.ProfileInfo
+	}
+	return nil
+}
+
+type GetUpdatedFilesResponse struct {
+	UpdatedFiles []*GetUpdatedFilesResponse_UpdatedFile `protobuf:"bytes,1,rep,name=updated_files,json=updatedFiles,proto3" json:"updated_files,omitempty"`
+	// The commit message to use.
+	CommitMessage string `protobuf:"bytes,2,opt,name=commit_message,json=commitMessage,proto3" json:"commit_message,omitempty"`
+	// Any footers to use.  Formatted to the current standard by Recipes.
+	CommitFooter         []*GetUpdatedFilesResponse_CommitFooter `protobuf:"bytes,3,rep,name=commit_footer,json=commitFooter,proto3" json:"commit_footer,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}                                `json:"-"`
+	XXX_unrecognized     []byte                                  `json:"-"`
+	XXX_sizecache        int32                                   `json:"-"`
+}
+
+func (m *GetUpdatedFilesResponse) Reset()         { *m = GetUpdatedFilesResponse{} }
+func (m *GetUpdatedFilesResponse) String() string { return proto.CompactTextString(m) }
+func (*GetUpdatedFilesResponse) ProtoMessage()    {}
+func (*GetUpdatedFilesResponse) Descriptor() ([]byte, []int) {
+	return fileDescriptor_7ff43bdb7436d394, []int{6}
+}
+
+func (m *GetUpdatedFilesResponse) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_GetUpdatedFilesResponse.Unmarshal(m, b)
+}
+func (m *GetUpdatedFilesResponse) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_GetUpdatedFilesResponse.Marshal(b, m, deterministic)
+}
+func (m *GetUpdatedFilesResponse) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_GetUpdatedFilesResponse.Merge(m, src)
+}
+func (m *GetUpdatedFilesResponse) XXX_Size() int {
+	return xxx_messageInfo_GetUpdatedFilesResponse.Size(m)
+}
+func (m *GetUpdatedFilesResponse) XXX_DiscardUnknown() {
+	xxx_messageInfo_GetUpdatedFilesResponse.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_GetUpdatedFilesResponse proto.InternalMessageInfo
+
+func (m *GetUpdatedFilesResponse) GetUpdatedFiles() []*GetUpdatedFilesResponse_UpdatedFile {
+	if m != nil {
+		return m.UpdatedFiles
+	}
+	return nil
+}
+
+func (m *GetUpdatedFilesResponse) GetCommitMessage() string {
+	if m != nil {
+		return m.CommitMessage
+	}
+	return ""
+}
+
+func (m *GetUpdatedFilesResponse) GetCommitFooter() []*GetUpdatedFilesResponse_CommitFooter {
+	if m != nil {
+		return m.CommitFooter
+	}
+	return nil
+}
+
+type GetUpdatedFilesResponse_UpdatedFile struct {
+	// The path to the (uncommitted) file.
+	Path                 string   `protobuf:"bytes,1,opt,name=path,proto3" json:"path,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *GetUpdatedFilesResponse_UpdatedFile) Reset()         { *m = GetUpdatedFilesResponse_UpdatedFile{} }
+func (m *GetUpdatedFilesResponse_UpdatedFile) String() string { return proto.CompactTextString(m) }
+func (*GetUpdatedFilesResponse_UpdatedFile) ProtoMessage()    {}
+func (*GetUpdatedFilesResponse_UpdatedFile) Descriptor() ([]byte, []int) {
+	return fileDescriptor_7ff43bdb7436d394, []int{6, 0}
+}
+
+func (m *GetUpdatedFilesResponse_UpdatedFile) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_GetUpdatedFilesResponse_UpdatedFile.Unmarshal(m, b)
+}
+func (m *GetUpdatedFilesResponse_UpdatedFile) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_GetUpdatedFilesResponse_UpdatedFile.Marshal(b, m, deterministic)
+}
+func (m *GetUpdatedFilesResponse_UpdatedFile) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_GetUpdatedFilesResponse_UpdatedFile.Merge(m, src)
+}
+func (m *GetUpdatedFilesResponse_UpdatedFile) XXX_Size() int {
+	return xxx_messageInfo_GetUpdatedFilesResponse_UpdatedFile.Size(m)
+}
+func (m *GetUpdatedFilesResponse_UpdatedFile) XXX_DiscardUnknown() {
+	xxx_messageInfo_GetUpdatedFilesResponse_UpdatedFile.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_GetUpdatedFilesResponse_UpdatedFile proto.InternalMessageInfo
+
+func (m *GetUpdatedFilesResponse_UpdatedFile) GetPath() string {
+	if m != nil {
+		return m.Path
+	}
+	return ""
+}
+
+// The Cq-Depend footer is used by LUCI (and Chrome OS Recipes) to operate
+// on interdependent changes at various steps.
+type GetUpdatedFilesResponse_CqDependFooter struct {
+	// The gerrit change(s) we depend on.
+	GerritChange         []*chromiumos.GerritChange `protobuf:"bytes,1,rep,name=gerrit_change,json=gerritChange,proto3" json:"gerrit_change,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}                   `json:"-"`
+	XXX_unrecognized     []byte                     `json:"-"`
+	XXX_sizecache        int32                      `json:"-"`
+}
+
+func (m *GetUpdatedFilesResponse_CqDependFooter) Reset() {
+	*m = GetUpdatedFilesResponse_CqDependFooter{}
+}
+func (m *GetUpdatedFilesResponse_CqDependFooter) String() string { return proto.CompactTextString(m) }
+func (*GetUpdatedFilesResponse_CqDependFooter) ProtoMessage()    {}
+func (*GetUpdatedFilesResponse_CqDependFooter) Descriptor() ([]byte, []int) {
+	return fileDescriptor_7ff43bdb7436d394, []int{6, 1}
+}
+
+func (m *GetUpdatedFilesResponse_CqDependFooter) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_GetUpdatedFilesResponse_CqDependFooter.Unmarshal(m, b)
+}
+func (m *GetUpdatedFilesResponse_CqDependFooter) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_GetUpdatedFilesResponse_CqDependFooter.Marshal(b, m, deterministic)
+}
+func (m *GetUpdatedFilesResponse_CqDependFooter) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_GetUpdatedFilesResponse_CqDependFooter.Merge(m, src)
+}
+func (m *GetUpdatedFilesResponse_CqDependFooter) XXX_Size() int {
+	return xxx_messageInfo_GetUpdatedFilesResponse_CqDependFooter.Size(m)
+}
+func (m *GetUpdatedFilesResponse_CqDependFooter) XXX_DiscardUnknown() {
+	xxx_messageInfo_GetUpdatedFilesResponse_CqDependFooter.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_GetUpdatedFilesResponse_CqDependFooter proto.InternalMessageInfo
+
+func (m *GetUpdatedFilesResponse_CqDependFooter) GetGerritChange() []*chromiumos.GerritChange {
+	if m != nil {
+		return m.GerritChange
+	}
+	return nil
+}
+
+// The Cq-Cl-Tag footer is used by cq-orchestrator to choose quota pools.
+type GetUpdatedFilesResponse_CqClTagFooter struct {
+	// The Cq-Cl-Tag value.
+	Tag                  string   `protobuf:"bytes,1,opt,name=tag,proto3" json:"tag,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *GetUpdatedFilesResponse_CqClTagFooter) Reset()         { *m = GetUpdatedFilesResponse_CqClTagFooter{} }
+func (m *GetUpdatedFilesResponse_CqClTagFooter) String() string { return proto.CompactTextString(m) }
+func (*GetUpdatedFilesResponse_CqClTagFooter) ProtoMessage()    {}
+func (*GetUpdatedFilesResponse_CqClTagFooter) Descriptor() ([]byte, []int) {
+	return fileDescriptor_7ff43bdb7436d394, []int{6, 2}
+}
+
+func (m *GetUpdatedFilesResponse_CqClTagFooter) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_GetUpdatedFilesResponse_CqClTagFooter.Unmarshal(m, b)
+}
+func (m *GetUpdatedFilesResponse_CqClTagFooter) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_GetUpdatedFilesResponse_CqClTagFooter.Marshal(b, m, deterministic)
+}
+func (m *GetUpdatedFilesResponse_CqClTagFooter) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_GetUpdatedFilesResponse_CqClTagFooter.Merge(m, src)
+}
+func (m *GetUpdatedFilesResponse_CqClTagFooter) XXX_Size() int {
+	return xxx_messageInfo_GetUpdatedFilesResponse_CqClTagFooter.Size(m)
+}
+func (m *GetUpdatedFilesResponse_CqClTagFooter) XXX_DiscardUnknown() {
+	xxx_messageInfo_GetUpdatedFilesResponse_CqClTagFooter.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_GetUpdatedFilesResponse_CqClTagFooter proto.InternalMessageInfo
+
+func (m *GetUpdatedFilesResponse_CqClTagFooter) GetTag() string {
+	if m != nil {
+		return m.Tag
+	}
+	return ""
+}
+
+type GetUpdatedFilesResponse_CommitFooter struct {
+	// Types that are valid to be assigned to Footer:
+	//	*GetUpdatedFilesResponse_CommitFooter_CqDepend
+	//	*GetUpdatedFilesResponse_CommitFooter_CqClTag
+	Footer               isGetUpdatedFilesResponse_CommitFooter_Footer `protobuf_oneof:"footer"`
+	XXX_NoUnkeyedLiteral struct{}                                      `json:"-"`
+	XXX_unrecognized     []byte                                        `json:"-"`
+	XXX_sizecache        int32                                         `json:"-"`
+}
+
+func (m *GetUpdatedFilesResponse_CommitFooter) Reset()         { *m = GetUpdatedFilesResponse_CommitFooter{} }
+func (m *GetUpdatedFilesResponse_CommitFooter) String() string { return proto.CompactTextString(m) }
+func (*GetUpdatedFilesResponse_CommitFooter) ProtoMessage()    {}
+func (*GetUpdatedFilesResponse_CommitFooter) Descriptor() ([]byte, []int) {
+	return fileDescriptor_7ff43bdb7436d394, []int{6, 3}
+}
+
+func (m *GetUpdatedFilesResponse_CommitFooter) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_GetUpdatedFilesResponse_CommitFooter.Unmarshal(m, b)
+}
+func (m *GetUpdatedFilesResponse_CommitFooter) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_GetUpdatedFilesResponse_CommitFooter.Marshal(b, m, deterministic)
+}
+func (m *GetUpdatedFilesResponse_CommitFooter) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_GetUpdatedFilesResponse_CommitFooter.Merge(m, src)
+}
+func (m *GetUpdatedFilesResponse_CommitFooter) XXX_Size() int {
+	return xxx_messageInfo_GetUpdatedFilesResponse_CommitFooter.Size(m)
+}
+func (m *GetUpdatedFilesResponse_CommitFooter) XXX_DiscardUnknown() {
+	xxx_messageInfo_GetUpdatedFilesResponse_CommitFooter.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_GetUpdatedFilesResponse_CommitFooter proto.InternalMessageInfo
+
+type isGetUpdatedFilesResponse_CommitFooter_Footer interface {
+	isGetUpdatedFilesResponse_CommitFooter_Footer()
+}
+
+type GetUpdatedFilesResponse_CommitFooter_CqDepend struct {
+	CqDepend *GetUpdatedFilesResponse_CqDependFooter `protobuf:"bytes,1,opt,name=cq_depend,json=cqDepend,proto3,oneof"`
+}
+
+type GetUpdatedFilesResponse_CommitFooter_CqClTag struct {
+	CqClTag *GetUpdatedFilesResponse_CqClTagFooter `protobuf:"bytes,2,opt,name=cq_cl_tag,json=cqClTag,proto3,oneof"`
+}
+
+func (*GetUpdatedFilesResponse_CommitFooter_CqDepend) isGetUpdatedFilesResponse_CommitFooter_Footer() {
+}
+
+func (*GetUpdatedFilesResponse_CommitFooter_CqClTag) isGetUpdatedFilesResponse_CommitFooter_Footer() {}
+
+func (m *GetUpdatedFilesResponse_CommitFooter) GetFooter() isGetUpdatedFilesResponse_CommitFooter_Footer {
+	if m != nil {
+		return m.Footer
+	}
+	return nil
+}
+
+func (m *GetUpdatedFilesResponse_CommitFooter) GetCqDepend() *GetUpdatedFilesResponse_CqDependFooter {
+	if x, ok := m.GetFooter().(*GetUpdatedFilesResponse_CommitFooter_CqDepend); ok {
+		return x.CqDepend
+	}
+	return nil
+}
+
+func (m *GetUpdatedFilesResponse_CommitFooter) GetCqClTag() *GetUpdatedFilesResponse_CqClTagFooter {
+	if x, ok := m.GetFooter().(*GetUpdatedFilesResponse_CommitFooter_CqClTag); ok {
+		return x.CqClTag
+	}
+	return nil
+}
+
+// XXX_OneofWrappers is for the internal use of the proto package.
+func (*GetUpdatedFilesResponse_CommitFooter) XXX_OneofWrappers() []interface{} {
+	return []interface{}{
+		(*GetUpdatedFilesResponse_CommitFooter_CqDepend)(nil),
+		(*GetUpdatedFilesResponse_CommitFooter_CqClTag)(nil),
+	}
+}
+
 type VerifyAFDOArtifactsRequest struct {
 	BuildTarget *chromiumos.BuildTarget `protobuf:"bytes,1,opt,name=build_target,json=buildTarget,proto3" json:"build_target,omitempty"`
 	// The type of AFDO artifact to test.
@@ -386,7 +739,7 @@
 func (m *VerifyAFDOArtifactsRequest) String() string { return proto.CompactTextString(m) }
 func (*VerifyAFDOArtifactsRequest) ProtoMessage()    {}
 func (*VerifyAFDOArtifactsRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor_7ff43bdb7436d394, []int{5}
+	return fileDescriptor_7ff43bdb7436d394, []int{7}
 }
 
 func (m *VerifyAFDOArtifactsRequest) XXX_Unmarshal(b []byte) error {
@@ -433,7 +786,7 @@
 func (m *VerifyAFDOArtifactsResponse) String() string { return proto.CompactTextString(m) }
 func (*VerifyAFDOArtifactsResponse) ProtoMessage()    {}
 func (*VerifyAFDOArtifactsResponse) Descriptor() ([]byte, []int) {
-	return fileDescriptor_7ff43bdb7436d394, []int{6}
+	return fileDescriptor_7ff43bdb7436d394, []int{8}
 }
 
 func (m *VerifyAFDOArtifactsResponse) XXX_Unmarshal(b []byte) error {
@@ -468,6 +821,13 @@
 	proto.RegisterType((*PrepareForToolchainBuildResponse)(nil), "chromite.api.PrepareForToolchainBuildResponse")
 	proto.RegisterType((*BundleToolchainRequest)(nil), "chromite.api.BundleToolchainRequest")
 	proto.RegisterType((*BundleToolchainResponse)(nil), "chromite.api.BundleToolchainResponse")
+	proto.RegisterType((*GetUpdatedFilesRequest)(nil), "chromite.api.GetUpdatedFilesRequest")
+	proto.RegisterType((*GetUpdatedFilesRequest_UploadedArtifacts)(nil), "chromite.api.GetUpdatedFilesRequest.UploadedArtifacts")
+	proto.RegisterType((*GetUpdatedFilesResponse)(nil), "chromite.api.GetUpdatedFilesResponse")
+	proto.RegisterType((*GetUpdatedFilesResponse_UpdatedFile)(nil), "chromite.api.GetUpdatedFilesResponse.UpdatedFile")
+	proto.RegisterType((*GetUpdatedFilesResponse_CqDependFooter)(nil), "chromite.api.GetUpdatedFilesResponse.CqDependFooter")
+	proto.RegisterType((*GetUpdatedFilesResponse_CqClTagFooter)(nil), "chromite.api.GetUpdatedFilesResponse.CqClTagFooter")
+	proto.RegisterType((*GetUpdatedFilesResponse_CommitFooter)(nil), "chromite.api.GetUpdatedFilesResponse.CommitFooter")
 	proto.RegisterType((*VerifyAFDOArtifactsRequest)(nil), "chromite.api.VerifyAFDOArtifactsRequest")
 	proto.RegisterType((*VerifyAFDOArtifactsResponse)(nil), "chromite.api.VerifyAFDOArtifactsResponse")
 }
@@ -475,59 +835,77 @@
 func init() { proto.RegisterFile("chromite/api/toolchain.proto", fileDescriptor_7ff43bdb7436d394) }
 
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+	0x1d, 0xbb, 0x15, 0xff, 0xdd, 0x0c, 0x00, 0x00,
 }
 
 // Reference imports to suppress errors if they are not otherwise used.
@@ -557,6 +935,7 @@
 	PrepareForBuild(ctx context.Context, in *PrepareForToolchainBuildRequest, opts ...grpc.CallOption) (*PrepareForToolchainBuildResponse, error)
 	// Bundle toolchain artifacts.
 	BundleArtifacts(ctx context.Context, in *BundleToolchainRequest, opts ...grpc.CallOption) (*BundleToolchainResponse, error)
+	GetUpdatedFiles(ctx context.Context, in *GetUpdatedFilesRequest, opts ...grpc.CallOption) (*GetUpdatedFilesResponse, error)
 }
 
 type toolchainServiceClient struct {
@@ -603,6 +982,15 @@
 	return out, nil
 }
 
+func (c *toolchainServiceClient) GetUpdatedFiles(ctx context.Context, in *GetUpdatedFilesRequest, opts ...grpc.CallOption) (*GetUpdatedFilesResponse, error) {
+	out := new(GetUpdatedFilesResponse)
+	err := c.cc.Invoke(ctx, "/chromite.api.ToolchainService/GetUpdatedFiles", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
 // ToolchainServiceServer is the server API for ToolchainService service.
 type ToolchainServiceServer interface {
 	// DEPRECATED for recipes: used only by legacy toolchain builders.
@@ -620,6 +1008,7 @@
 	PrepareForBuild(context.Context, *PrepareForToolchainBuildRequest) (*PrepareForToolchainBuildResponse, error)
 	// Bundle toolchain artifacts.
 	BundleArtifacts(context.Context, *BundleToolchainRequest) (*BundleToolchainResponse, error)
+	GetUpdatedFiles(context.Context, *GetUpdatedFilesRequest) (*GetUpdatedFilesResponse, error)
 }
 
 // UnimplementedToolchainServiceServer can be embedded to have forward compatible implementations.
@@ -638,6 +1027,9 @@
 func (*UnimplementedToolchainServiceServer) BundleArtifacts(ctx context.Context, req *BundleToolchainRequest) (*BundleToolchainResponse, error) {
 	return nil, status.Errorf(codes.Unimplemented, "method BundleArtifacts not implemented")
 }
+func (*UnimplementedToolchainServiceServer) GetUpdatedFiles(ctx context.Context, req *GetUpdatedFilesRequest) (*GetUpdatedFilesResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method GetUpdatedFiles not implemented")
+}
 
 func RegisterToolchainServiceServer(s *grpc.Server, srv ToolchainServiceServer) {
 	s.RegisterService(&_ToolchainService_serviceDesc, srv)
@@ -715,6 +1107,24 @@
 	return interceptor(ctx, in, info, handler)
 }
 
+func _ToolchainService_GetUpdatedFiles_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(GetUpdatedFilesRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(ToolchainServiceServer).GetUpdatedFiles(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/chromite.api.ToolchainService/GetUpdatedFiles",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(ToolchainServiceServer).GetUpdatedFiles(ctx, req.(*GetUpdatedFilesRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
 var _ToolchainService_serviceDesc = grpc.ServiceDesc{
 	ServiceName: "chromite.api.ToolchainService",
 	HandlerType: (*ToolchainServiceServer)(nil),
@@ -735,6 +1145,10 @@
 			MethodName: "BundleArtifacts",
 			Handler:    _ToolchainService_BundleArtifacts_Handler,
 		},
+		{
+			MethodName: "GetUpdatedFiles",
+			Handler:    _ToolchainService_GetUpdatedFiles_Handler,
+		},
 	},
 	Streams:  []grpc.StreamDesc{},
 	Metadata: "chromite/api/toolchain.proto",
diff --git a/src/chromite/api/toolchain.proto b/src/chromite/api/toolchain.proto
index 103360c..dfe0b08 100644
--- a/src/chromite/api/toolchain.proto
+++ b/src/chromite/api/toolchain.proto
@@ -76,6 +76,50 @@
   repeated ArtifactInfo artifacts_info = 2;
 }
 
+message GetUpdatedFilesRequest {
+  // We need the artifact info from BundleResponse and the profile info
+  // as the input of the request.
+  message UploadedArtifacts {
+    ArtifactInfo artifact_info = 1;
+    chromiumos.ArtifactProfileInfo profile_info = 2;
+  }
+  repeated UploadedArtifacts uploaded_artifacts = 1;
+}
+
+message GetUpdatedFilesResponse {
+  message UpdatedFile {
+    // The path to the (uncommitted) file.
+    string path = 1;
+  }
+  repeated UpdatedFile updated_files = 1;
+
+  // The commit message to use.
+  string commit_message = 2;
+
+  // The Cq-Depend footer is used by LUCI (and Chrome OS Recipes) to operate
+  // on interdependent changes at various steps.
+  message CqDependFooter {
+    // The gerrit change(s) we depend on.
+    repeated chromiumos.GerritChange gerrit_change = 1;
+  }
+
+  // The Cq-Cl-Tag footer is used by cq-orchestrator to choose quota pools.
+  message CqClTagFooter {
+    // The Cq-Cl-Tag value.
+    string tag = 1;
+  }
+
+  message CommitFooter {
+    oneof footer {
+      CqDependFooter cq_depend = 1;
+      CqClTagFooter cq_cl_tag = 2;
+    }
+  }
+
+  // Any footers to use.  Formatted to the current standard by Recipes.
+  repeated CommitFooter commit_footer = 3;
+}
+
 // TODO(crbug.com/1020615): Drop this once this is live in production and all of
 // the users have migrated to using BuilderConfig.Artifacts.ArtifactType
 // Meanwhile, keep this in sync with chromiumos/builder_config.proto.
@@ -145,4 +189,7 @@
   // Bundle toolchain artifacts.
   rpc BundleArtifacts(BundleToolchainRequest)
     returns (BundleToolchainResponse);
+
+  rpc GetUpdatedFiles(GetUpdatedFilesRequest)
+    returns (GetUpdatedFilesResponse);
 }