remote API: support uploading files from the file system

Allow implementations to have a specialized way of uploading a file
owned by the build process to the applicable cas, both as file, as
well as as tree object (in native mode).

If no implementation is provided, the default is to read the file
into memory and use the Upload method.

1 files changed, 56 insertions, 0 deletions

diff --git a/src/buildtool/execution_api/common/execution_api.cpp b/src/buildtool/execution_api/common/execution_api.cpp
new file mode 100644
index 00000000..f91dee43
--- /dev/null
+++ b/src/buildtool/execution_api/common/execution_api.cpp
@@ -0,0 +1,56 @@
+// 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.
+
+#include "src/buildtool/execution_api/common/execution_api.hpp"
+
+#include "src/buildtool/execution_api/bazel_msg/bazel_blob_container.hpp"
+#include "src/buildtool/file_system/file_system_manager.hpp"
+
+#include <gsl/gsl>
+
+[[nodiscard]] auto IExecutionApi::UploadFile(
+    std::filesystem::path const& file_path,
+    ObjectType type) noexcept -> bool {
+    auto data = FileSystemManager::ReadFile(file_path);
+    if (not data) {
+        return false;
+    }
+    ArtifactDigest digest{};
+    switch (type) {
+        case ObjectType::File:
+            digest = ArtifactDigest::Create<ObjectType::File>(*data);
+            break;
+        case ObjectType::Executable:
+            digest = ArtifactDigest::Create<ObjectType::Executable>(*data);
+            break;
+        case ObjectType::Tree:
+            digest = ArtifactDigest::Create<ObjectType::Tree>(*data);
+            break;
+        case ObjectType::Symlink:
+            digest = ArtifactDigest::Create<ObjectType::Symlink>(*data);
+            break;
+        default:
+            Ensures(false);  // unreachable
+            return false;
+    }
+    BlobContainer container{};
+    try {
+        auto exec = IsExecutableObject(type);
+        container.Emplace(BazelBlob{digest, *data, exec});
+    } catch (std::exception const& ex) {
+        Logger::Log(LogLevel::Error, "failed to emplace blob: ", ex.what());
+        return false;
+    }
+    return Upload(container);
+}