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diff --git a/src/buildtool/serve_api/serve_service/target_utils.hpp b/src/buildtool/serve_api/serve_service/target_utils.hpp
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+// Copyright 2023 Huawei Cloud Computing Technology Co., Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef INCLUDED_SRC_BUILD_SERVE_API_SERVE_SERVICE_TARGET_UTILS_HPP
+#define INCLUDED_SRC_BUILD_SERVE_API_SERVE_SERVICE_TARGET_UTILS_HPP
+
+#include <filesystem>
+#include <memory>
+#include <optional>
+#include <string>
+#include <utility>
+
+#include "gsl/gsl"
+#include "src/buildtool/common/remote/remote_common.hpp"
+#include "src/buildtool/common/repository_config.hpp"
+#include "src/buildtool/logging/logger.hpp"
+
+// Methods used by ServeTarget remote service
+
+/// \brief Check if tree exists in the given repository.
+[[nodiscard]] auto IsTreeInRepo(std::string const& tree_id,
+                                std::filesystem::path const& repo_path,
+                                std::shared_ptr<Logger> const& logger) -> bool;
+
+/// \brief For a given tree id, find the known repository that can serve it.
+[[nodiscard]] auto GetServingRepository(std::string const& tree_id,
+                                        std::shared_ptr<Logger> const& logger)
+    -> std::optional<std::filesystem::path>;
+
+/// \brief Parse the stored repository configuration blob and populate the
+/// RepositoryConfig instance.
+/// \returns nullopt on success, error message as a string otherwise.
+[[nodiscard]] auto DetermineRoots(
+    std::string const& main_repo,
+    std::filesystem::path const& repo_config_path,
+    gsl::not_null<RepositoryConfig*> const& repository_config,
+    std::shared_ptr<Logger> const& logger) -> std::optional<std::string>;
+
+// Methods used by ServeTargetVariables remote service
+
+/// \brief Get the blob content at given path inside a Git tree.
+/// \returns If tree found, pair of "no-internal-errors" flag and content of
+/// blob at the path specified if blob exists, nullopt otherwise.
+[[nodiscard]] auto GetBlobContent(std::filesystem::path const& repo_path,
+                                  std::string const& tree_id,
+                                  std::string const& rel_path,
+                                  std::shared_ptr<Logger> const& logger)
+    -> std::optional<std::pair<bool, std::optional<std::string>>>;
+
+#endif  // INCLUDED_SRC_BUILD_SERVE_API_SERVE_SERVICE_TARGET_UTILS_HPP