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// Copyright 2022 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_LOCAL_LOCAL_AC_HPP
#define INCLUDED_SRC_BUILDTOOL_EXECUTION_API_LOCAL_LOCAL_AC_HPP
#include "gsl-lite/gsl-lite.hpp"
#include "src/buildtool/common/bazel_types.hpp"
#include "src/buildtool/execution_api/common/execution_common.hpp"
#include "src/buildtool/execution_api/local/config.hpp"
#include "src/buildtool/execution_api/local/local_cas.hpp"
#include "src/buildtool/file_system/file_storage.hpp"
#include "src/buildtool/file_system/file_system_manager.hpp"
#include "src/buildtool/logging/logger.hpp"
class LocalAC {
public:
explicit LocalAC(gsl::not_null<LocalCAS<ObjectType::File>*> cas) noexcept
: cas_{std::move(cas)} {};
LocalAC(LocalAC const&) = delete;
LocalAC(LocalAC&&) = delete;
auto operator=(LocalAC const&) -> LocalAC& = delete;
auto operator=(LocalAC&&) -> LocalAC& = delete;
~LocalAC() noexcept = default;
[[nodiscard]] auto StoreResult(
bazel_re::Digest const& action_id,
bazel_re::ActionResult const& result) const noexcept -> bool {
auto bytes = result.SerializeAsString();
auto digest = cas_->StoreBlobFromBytes(bytes);
return (digest and file_store_.AddFromBytes(
NativeSupport::Unprefix(action_id.hash()),
digest->SerializeAsString()));
}
[[nodiscard]] auto CachedResult(bazel_re::Digest const& action_id)
const noexcept -> std::optional<bazel_re::ActionResult> {
auto entry_path =
file_store_.GetPath(NativeSupport::Unprefix(action_id.hash()));
bazel_re::Digest digest{};
auto const entry =
FileSystemManager::ReadFile(entry_path, ObjectType::File);
if (not entry.has_value()) {
logger_.Emit(LogLevel::Debug,
"Cache miss, entry not found {}",
entry_path.string());
return std::nullopt;
}
if (not digest.ParseFromString(*entry)) {
logger_.Emit(LogLevel::Warning,
"Parsing cache entry failed for action {}",
NativeSupport::Unprefix(action_id.hash()));
return std::nullopt;
}
auto src_path = cas_->BlobPath(digest);
bazel_re::ActionResult result{};
if (src_path) {
auto const bytes = FileSystemManager::ReadFile(*src_path);
if (bytes.has_value() and result.ParseFromString(*bytes)) {
return result;
}
}
logger_.Emit(LogLevel::Warning,
"Parsing action result failed for action {}",
NativeSupport::Unprefix(action_id.hash()));
return std::nullopt;
}
private:
// The action cache stores the results of failed actions. For those to be
// overwritable by subsequent runs we need to choose the store mode "last
// wins" for the underlying file storage.
static constexpr auto kStoreMode = StoreMode::LastWins;
Logger logger_{"LocalAC"};
gsl::not_null<LocalCAS<ObjectType::File>*> cas_;
FileStorage<ObjectType::File, kStoreMode, /*kSetEpochTime=*/false>
file_store_{LocalExecutionConfig::ActionCacheDir()};
};
#endif // INCLUDED_SRC_BUILDTOOL_EXECUTION_API_LOCAL_LOCAL_AC_HPP
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