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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_BUILDTOOL_STORAGE_LOCAL_AC_TPP
#define INCLUDED_SRC_BUILDTOOL_STORAGE_LOCAL_AC_TPP
#include <tuple> //std::ignore
#include <utility> // std::move
#include "fmt/core.h"
#include "nlohmann/json.hpp"
#include "src/buildtool/common/bazel_types.hpp"
#include "src/buildtool/logging/log_level.hpp"
#include "src/buildtool/storage/local_ac.hpp"
template <bool kDoGlobalUplink>
auto LocalAC<kDoGlobalUplink>::StoreResult(
bazel_re::Digest const& action_id,
bazel_re::ActionResult const& result) const noexcept -> bool {
auto const cas_key = WriteAction(result);
return cas_key.has_value() and
WriteActionKey(static_cast<ArtifactDigest>(action_id),
static_cast<ArtifactDigest>(*cas_key));
}
template <bool kDoGlobalUplink>
auto LocalAC<kDoGlobalUplink>::CachedResult(bazel_re::Digest const& action_id)
const noexcept -> std::optional<bazel_re::ActionResult> {
auto const cas_key = ReadActionKey(action_id);
if (not cas_key) {
logger_->Emit(LogLevel::Warning, cas_key.error());
return std::nullopt;
}
auto result = ReadAction(*cas_key);
if (not result) {
logger_->Emit(LogLevel::Warning,
"Parsing action result failed for action {}",
NativeSupport::Unprefix(action_id.hash()));
return std::nullopt;
}
return std::move(result);
}
template <bool kDoGlobalUplink>
template <bool kIsLocalGeneration>
requires(kIsLocalGeneration) auto LocalAC<kDoGlobalUplink>::LocalUplinkEntry(
LocalGenerationAC const& latest,
bazel_re::Digest const& action_id) const noexcept -> bool {
// Determine action cache key path in latest generation.
auto const key_digest = NativeSupport::Unprefix(action_id.hash());
if (FileSystemManager::IsFile(latest.file_store_.GetPath(key_digest))) {
return true;
}
// Read cache key
auto const cas_key = ReadActionKey(action_id);
if (not cas_key) {
return false;
}
// Read result (cache value)
auto const result = ReadAction(*cas_key);
if (not result) {
return false;
}
// Uplink result content
for (auto const& file : result->output_files()) {
if (not cas_.LocalUplinkBlob(
latest.cas_, file.digest(), file.is_executable())) {
return false;
}
}
for (auto const& link : result->output_file_symlinks()) {
if (not cas_.LocalUplinkBlob(latest.cas_,
ArtifactDigest::Create<ObjectType::File>(
cas_.GetHashFunction(), link.target()),
/*is_executable=*/false)) {
return false;
}
}
for (auto const& link : result->output_directory_symlinks()) {
if (not cas_.LocalUplinkBlob(latest.cas_,
ArtifactDigest::Create<ObjectType::File>(
cas_.GetHashFunction(), link.target()),
/*is_executable=*/false)) {
return false;
}
}
for (auto const& directory : result->output_directories()) {
if (not cas_.LocalUplinkTree(latest.cas_, directory.tree_digest())) {
return false;
}
}
// Uplink result (cache value)
if (not cas_.LocalUplinkBlob(latest.cas_,
*cas_key,
/*is_executable=*/false)) {
return false;
}
auto const ac_entry_path = file_store_.GetPath(key_digest);
// Uplink cache key
return latest.file_store_.AddFromFile(key_digest,
ac_entry_path,
/*is_owner=*/true);
}
template <bool kDoGlobalUplink>
auto LocalAC<kDoGlobalUplink>::WriteActionKey(
ArtifactDigest const& action_id,
ArtifactDigest const& cas_key) const noexcept -> bool {
nlohmann::json const content = {cas_key.hash(), cas_key.size()};
return file_store_.AddFromBytes(action_id.hash(), content.dump());
}
template <bool kDoGlobalUplink>
auto LocalAC<kDoGlobalUplink>::ReadActionKey(bazel_re::Digest const& action_id)
const noexcept -> expected<bazel_re::Digest, std::string> {
auto const key_path =
file_store_.GetPath(NativeSupport::Unprefix(action_id.hash()));
if constexpr (kDoGlobalUplink) {
// Uplink any existing action-cache entries in storage generations
std::ignore = uplinker_.UplinkActionCacheEntry(action_id);
}
auto const key_content =
FileSystemManager::ReadFile(key_path, ObjectType::File);
if (not key_content) {
return unexpected{
fmt::format("Cache miss, entry not found {}", key_path.string())};
}
std::optional<bazel_re::Digest> action_key;
try {
nlohmann::json j = nlohmann::json::parse(*key_content);
action_key = ArtifactDigest{j[0].template get<std::string>(),
j[1].template get<std::size_t>(),
/*is_tree=*/false};
} catch (...) {
return unexpected{
fmt::format("Parsing cache entry failed for action {}",
NativeSupport::Unprefix(action_id.hash()))};
}
return *std::move(action_key);
}
template <bool kDoGlobalUplink>
auto LocalAC<kDoGlobalUplink>::WriteAction(bazel_re::ActionResult const& action)
const noexcept -> std::optional<bazel_re::Digest> {
return cas_.StoreBlob(action.SerializeAsString(),
/*is_executable=*/false);
}
template <bool kDoGlobalUplink>
auto LocalAC<kDoGlobalUplink>::ReadAction(bazel_re::Digest const& cas_key)
const noexcept -> std::optional<bazel_re::ActionResult> {
auto const action_path = cas_.BlobPath(cas_key,
/*is_executable=*/false);
if (not action_path) {
return std::nullopt;
}
auto const action_content = FileSystemManager::ReadFile(*action_path);
if (not action_content) {
return std::nullopt;
}
bazel_re::ActionResult action{};
if (action.ParseFromString(*action_content)) {
return std::move(action);
}
return std::nullopt;
}
#endif // INCLUDED_SRC_BUILDTOOL_STORAGE_LOCAL_AC_TPP
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