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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.
#include "src/buildtool/storage/target_cache_entry.hpp"
#include <algorithm>
#include <exception>
#include <iterator>
#include <memory>
#include <string>
#include <vector>
#include "src/buildtool/build_engine/expression/expression_ptr.hpp"
#include "src/buildtool/common/artifact_digest.hpp"
#include "src/buildtool/common/artifact_digest_factory.hpp"
#include "src/buildtool/file_system/object_type.hpp"
#include "src/buildtool/logging/log_level.hpp"
#include "src/buildtool/logging/logger.hpp"
#include "src/utils/cpp/expected.hpp"
#include "src/utils/cpp/gsl.hpp"
auto TargetCacheEntry::FromTarget(
HashFunction::Type hash_type,
AnalysedTargetPtr const& target,
std::unordered_map<ArtifactDescription, Artifact::ObjectInfo> const&
replacements) noexcept -> std::optional<TargetCacheEntry> {
auto result = TargetResult{.artifact_stage = target->Artifacts(),
.provides = target->Provides(),
.runfiles = target->RunFiles()};
auto desc = result.ReplaceNonKnownAndToJson(replacements);
if (not desc) {
return std::nullopt;
}
std::vector<std::string> implied{};
for (auto const& x : target->ImpliedExport()) {
implied.emplace_back(x);
}
if (not implied.empty()) {
(*desc)["implied export targets"] = implied;
}
return TargetCacheEntry{hash_type, *desc};
}
auto TargetCacheEntry::FromJson(HashFunction::Type hash_type,
nlohmann::json desc) noexcept
-> TargetCacheEntry {
return TargetCacheEntry(hash_type, std::move(desc));
}
auto TargetCacheEntry::ToResult() const noexcept
-> std::optional<TargetResult> {
return TargetResult::FromJson(hash_type_, desc_);
}
auto TargetCacheEntry::ToImplied() const noexcept -> std::set<std::string> {
std::set<std::string> result{};
if (desc_.contains("implied export targets")) {
try {
for (auto const& x : desc_["implied export targets"]) {
result.emplace(x);
}
} catch (std::exception const& ex) {
Logger::Log(LogLevel::Warning,
"Exception reading implied export targets: {}",
ex.what());
}
}
return result;
}
auto TargetCacheEntry::ToImpliedIds(std::string const& entry_key_hash)
const noexcept -> std::optional<std::vector<Artifact::ObjectInfo>> {
std::vector<Artifact::ObjectInfo> result{};
if (desc_.contains("implied export targets")) {
try {
for (auto const& x : desc_["implied export targets"]) {
if (x != entry_key_hash) {
auto digest = ArtifactDigestFactory::Create(
hash_type_, x, 0, /*is_tree=*/false);
if (not digest) {
Logger::Log(
LogLevel::Debug, "{}", std::move(digest).error());
return std::nullopt;
}
result.emplace_back(
Artifact::ObjectInfo{.digest = *std::move(digest),
.type = ObjectType::File});
}
}
} catch (std::exception const& ex) {
Logger::Log(LogLevel::Warning,
"Exception reading implied export targets: {}",
ex.what());
return std::nullopt;
}
}
return result;
}
[[nodiscard]] static auto ToObjectInfo(HashFunction::Type hash_type,
nlohmann::json const& json)
-> Artifact::ObjectInfo {
auto const desc = ArtifactDescription::FromJson(hash_type, json);
// The assumption is that all artifacts mentioned in a target cache
// entry are KNOWN to the remote side.
ExpectsAudit(desc and desc->IsKnown());
auto const& info = desc->ToArtifact().Info();
ExpectsAudit(info);
return *info;
}
[[nodiscard]] static auto ScanArtifactMap(
HashFunction::Type hash_type,
gsl::not_null<std::vector<Artifact::ObjectInfo>*> const& infos,
nlohmann::json const& json) -> bool {
if (not json.is_object()) {
return false;
}
infos->reserve(infos->size() + json.size());
std::transform(json.begin(),
json.end(),
std::back_inserter(*infos),
[hash_type](auto const& item) {
return ToObjectInfo(hash_type, item);
});
return true;
}
[[nodiscard]] static auto ScanProvidesMap(
HashFunction::Type hash_type,
gsl::not_null<std::vector<Artifact::ObjectInfo>*> const& infos,
nlohmann::json const& json) -> bool {
if (not json.is_object()) {
return false;
}
auto const& nodes = json["nodes"];
auto const& provided_artifacts = json["provided_artifacts"];
infos->reserve(infos->size() + provided_artifacts.size());
std::transform(provided_artifacts.begin(),
provided_artifacts.end(),
std::back_inserter(*infos),
[hash_type, &nodes](auto const& item) {
return ToObjectInfo(
hash_type, nodes[item.template get<std::string>()]);
});
return true;
}
auto TargetCacheEntry::ToArtifacts(
gsl::not_null<std::vector<Artifact::ObjectInfo>*> const& infos)
const noexcept -> bool {
try {
if (ScanArtifactMap(hash_type_, infos, desc_["artifacts"]) and
ScanArtifactMap(hash_type_, infos, desc_["runfiles"]) and
ScanProvidesMap(hash_type_, infos, desc_["provides"])) {
return true;
}
} catch (std::exception const& ex) {
Logger::Log(
LogLevel::Error,
"Scanning target cache entry for artifacts failed with:\n{}",
ex.what());
}
return false;
}
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