Instantiate LocalApi and BazelApi at once

...to properly fallback to local api if needed.

1 files changed, 64 insertions, 0 deletions

diff --git a/src/buildtool/execution_api/common/api_bundle.hpp b/src/buildtool/execution_api/common/api_bundle.hpp
new file mode 100644
index 00000000..09e06901
--- /dev/null
+++ b/src/buildtool/execution_api/common/api_bundle.hpp
@@ -0,0 +1,64 @@
+// 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_BUILDTOOL_EXECUTION_API_COMMON_API_BUNDLE_HPP
+#define INCLUDED_SRC_BUILDTOOL_EXECUTION_API_COMMON_API_BUNDLE_HPP
+
+#include <memory>
+#include <optional>
+
+#include "gsl/gsl"
+#include "src/buildtool/common/remote/remote_common.hpp"
+#include "src/buildtool/common/repository_config.hpp"
+#include "src/buildtool/execution_api/local/local_api.hpp"
+#include "src/buildtool/execution_api/remote/bazel/bazel_api.hpp"
+
+/// \brief Utility function to instantiate either a Local or Bazel Execution
+/// API.
+/// \param address if provided, a BazelApi is instantiated
+/// \param repo_config repository configuration to be used by GitApi calls
+/// \param instance_name only used in the construction of the BazelApi object
+[[nodiscard]] static inline auto CreateExecutionApi(
+    std::optional<ServerAddress> const& address,
+    std::optional<gsl::not_null<const RepositoryConfig*>> const& repo_config =
+        std::nullopt,
+    std::string const& instance_name = "remote-execution")
+    -> gsl::not_null<IExecutionApi::Ptr> {
+    if (address) {
+        ExecutionConfiguration config;
+        config.skip_cache_lookup = false;
+
+        return std::make_unique<BazelApi>(
+            instance_name, address->host, address->port, config);
+    }
+    return std::make_unique<LocalApi>(repo_config);
+}
+
+/// \brief Utility structure for instantiation of local and remote apis at the
+/// same time. If the remote api cannot be instantiated, it falls back to
+/// exactly the same instance that local api is (&*remote == & *local).
+struct ApiBundle final {
+    explicit ApiBundle(
+        std::optional<gsl::not_null<const RepositoryConfig*>> const&
+            repo_config,
+        std::optional<ServerAddress> const& remote_address);
+
+    [[nodiscard]] auto CreateRemote(std::optional<ServerAddress> const& address)
+        const -> gsl::not_null<std::shared_ptr<IExecutionApi>>;
+
+    gsl::not_null<std::shared_ptr<IExecutionApi>> const local;
+    gsl::not_null<std::shared_ptr<IExecutionApi>> const remote;
+};
+
+#endif  // INCLUDED_SRC_BUILDTOOL_EXECUTION_API_COMMON_API_BUNDLE_HPP