1 files changed, 111 insertions, 0 deletions
diff --git a/src/buildtool/serve_api/remote/serve_api.cpp b/src/buildtool/serve_api/remote/serve_api.cpp
new file mode 100644
index 00000000..37911e1d
--- /dev/null
+++ b/src/buildtool/serve_api/remote/serve_api.cpp
@@ -0,0 +1,111 @@
+// Copyright 2025 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 BOOTSTRAP_BUILD_TOOL
+
+#include "src/buildtool/serve_api/remote/serve_api.hpp"
+
+#include "fmt/core.h"
+#include "src/buildtool/common/artifact.hpp"
+#include "src/buildtool/common/protocol_traits.hpp"
+#include "src/buildtool/common/repository_config.hpp"
+#include "src/buildtool/crypto/hash_function.hpp"
+#include "src/buildtool/execution_api/common/execution_api.hpp"
+#include "src/buildtool/execution_api/serve/mr_git_api.hpp"
+#include "src/buildtool/execution_api/utils/rehash_utils.hpp"
+#include "src/buildtool/file_system/object_type.hpp"
+
+auto ServeApi::UploadTree(ArtifactDigest const& tree,
+                          std::filesystem::path const& git_repo) const noexcept
+    -> expected<std::monostate, UploadError> {
+    static constexpr bool kIsSyncError = true;
+    if (not tree.IsTree() or not ProtocolTraits::IsNative(tree.GetHashType())) {
+        return unexpected{UploadError{
+            fmt::format("Not a git tree: {}", tree.hash()), not kIsSyncError}};
+    }
+
+    RepositoryConfig repo;
+    if (not repo.SetGitCAS(git_repo)) {
+        return unexpected{UploadError{
+            fmt::format("Failed to SetGitCAS at {}", git_repo.string()),
+            not kIsSyncError}};
+    }
+
+    bool const with_rehashing =
+        not ProtocolTraits::IsNative(storage_config_.hash_function.GetType());
+
+    // Create a native storage config if rehashing is needed:
+    std::optional<StorageConfig> native_storage_config;
+    if (with_rehashing) {
+        auto config = StorageConfig::Builder::Rebuild(storage_config_)
+                          .SetHashType(HashFunction::Type::GitSHA1)
+                          .Build();
+        if (not config.has_value()) {
+            return unexpected{
+                UploadError{fmt::format("Failed to create native storage: {}",
+                                        std::move(config).error()),
+                            not kIsSyncError}};
+        }
+        native_storage_config.emplace(*config);
+    }
+
+    std::shared_ptr<IExecutionApi> git_api;
+    if (with_rehashing) {
+        git_api = std::make_shared<MRGitApi>(
+            &repo, &*native_storage_config, &storage_config_, &*apis_.local);
+    }
+    else {
+        git_api = std::make_shared<MRGitApi>(&repo, &storage_config_);
+    }
+
+    // Upload tree to remote CAS:
+    if (not git_api->RetrieveToCas(
+            {Artifact::ObjectInfo{tree, ObjectType::Tree}}, *apis_.remote)) {
+        return unexpected{
+            UploadError{fmt::format("Failed to sync tree {} from repository {}",
+                                    tree.hash(),
+                                    git_repo.string()),
+                        not kIsSyncError}};
+    }
+
+    ArtifactDigest on_remote = tree;
+    // Read rehashed digest if needed:
+    if (with_rehashing) {
+        auto rehashed = RehashUtils::ReadRehashedDigest(
+            tree, *native_storage_config, storage_config_, /*from_git=*/true);
+        if (not rehashed.has_value()) {
+            return unexpected{
+                UploadError{std::move(rehashed).error(), not kIsSyncError}};
+        }
+
+        if (not rehashed.value().has_value()) {
+            return unexpected{UploadError{
+                fmt::format("No digest provided to sync root tree {}",
+                            tree.hash()),
+                kIsSyncError}};
+        }
+        on_remote = rehashed.value()->digest;
+    }
+
+    // Ask serve to get tree from remote:
+    if (not this->GetTreeFromRemote(on_remote)) {
+        return unexpected{UploadError{
+            fmt::format("Serve endpoint failed to sync root tree {}.",
+                        tree.hash()),
+            kIsSyncError}};
+    }
+    return std::monostate{};
+}
+
+#endif