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// Copyright 2024 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/remote/bazel/bazel_network_reader.hpp"
#include <algorithm>
#include <cstddef>
#include <filesystem>
#include <memory>
#include <unordered_set>
#include <utility>
#include "src/buildtool/common/protocol_traits.hpp"
#include "src/buildtool/execution_api/bazel_msg/bazel_msg_factory.hpp"
#include "src/buildtool/logging/log_level.hpp"
#include "src/buildtool/logging/logger.hpp"
#include "src/utils/cpp/back_map.hpp"
#include "src/utils/cpp/gsl.hpp"
#include "src/utils/cpp/path.hpp"
BazelNetworkReader::BazelNetworkReader(
std::string instance_name,
gsl::not_null<BazelCasClient const*> const& cas,
HashFunction hash_function) noexcept
: instance_name_{std::move(instance_name)},
cas_{*cas},
hash_function_{hash_function} {}
auto BazelNetworkReader::ReadDirectory(ArtifactDigest const& digest)
const noexcept -> std::optional<bazel_re::Directory> {
if (auto blob = ReadSingleBlob(digest)) {
if (auto const content = blob->ReadContent()) {
return BazelMsgFactory::MessageFromString<bazel_re::Directory>(
*content);
}
}
Logger::Log(
LogLevel::Debug, "Directory {} not found in CAS", digest.hash());
return std::nullopt;
}
auto BazelNetworkReader::ReadGitTree(ArtifactDigest const& digest)
const noexcept -> std::optional<GitRepo::tree_entries_t> {
ExpectsAudit(IsNativeProtocol());
auto read_blob = ReadSingleBlob(digest);
if (not read_blob) {
Logger::Log(LogLevel::Debug, "Tree {} not found in CAS", digest.hash());
return std::nullopt;
}
auto const content = read_blob->ReadContent();
if (content == nullptr) {
return std::nullopt;
}
auto check_symlinks = [this](std::vector<ArtifactDigest> const& ids) {
auto const blobs = ReadOrdered(ids);
if (blobs.size() != ids.size()) {
Logger::Log(LogLevel::Debug,
"BazelNetworkReader::ReadGitTree: read wrong number of "
"symlinks.");
return false;
}
return std::all_of(
blobs.begin(), blobs.end(), [](ArtifactBlob const& blob) {
auto const content = blob.ReadContent();
return content != nullptr and PathIsNonUpwards(*content);
});
};
return GitRepo::ReadTreeData(*content,
digest.hash(),
check_symlinks,
/*is_hex_id=*/true);
}
auto BazelNetworkReader::DumpRawTree(Artifact::ObjectInfo const& info,
DumpCallback const& dumper) const noexcept
-> bool {
auto read_blob = ReadSingleBlob(info.digest);
if (not read_blob) {
Logger::Log(
LogLevel::Debug, "Object {} not found in CAS", info.digest.hash());
return false;
}
try {
auto const content = read_blob->ReadContent();
return content != nullptr and std::invoke(dumper, *content);
} catch (...) {
return false;
}
}
auto BazelNetworkReader::DumpBlob(Artifact::ObjectInfo const& info,
DumpCallback const& dumper) const noexcept
-> bool {
auto reader = cas_.IncrementalReadSingleBlob(instance_name_, info.digest);
auto data = reader.Next();
while (data and not data->empty()) {
try {
if (not std::invoke(dumper, *data)) {
return false;
}
} catch (...) {
return false;
}
data = reader.Next();
}
return data.has_value();
}
auto BazelNetworkReader::IsNativeProtocol() const noexcept -> bool {
return ProtocolTraits::IsNative(hash_function_.GetType());
}
auto BazelNetworkReader::ReadSingleBlob(ArtifactDigest const& digest)
const noexcept -> std::optional<ArtifactBlob> {
return cas_.ReadSingleBlob(instance_name_, digest);
}
auto BazelNetworkReader::Read(std::unordered_set<ArtifactDigest> const& digests)
const noexcept -> std::unordered_set<ArtifactBlob> {
std::unordered_set<ArtifactBlob> read_result;
read_result.reserve(digests.size());
std::unordered_set<ArtifactDigest> to_batch;
to_batch.reserve(digests.size());
// Upload blobs that don't fit for batching: size is larger than limit or
// unknown
std::size_t const limit = cas_.GetMaxBatchTransferSize(instance_name_);
for (auto const& digest : digests) {
if (digest.size() == 0 or digest.size() > limit) {
auto blob = cas_.ReadSingleBlob(instance_name_, digest);
if (blob.has_value()) {
read_result.emplace(*std::move(blob));
}
}
else {
to_batch.emplace(digest);
}
}
// Batch remaining blobs:
read_result.merge(cas_.BatchReadBlobs(instance_name_, to_batch));
return read_result;
}
auto BazelNetworkReader::ReadOrdered(std::vector<ArtifactDigest> const& digests)
const noexcept -> std::vector<ArtifactBlob> {
auto const read_result =
Read(std::unordered_set(digests.begin(), digests.end()));
auto const back_map = BackMap<ArtifactDigest, ArtifactBlob>::Make(
&read_result,
[](ArtifactBlob const& blob) { return blob.GetDigest(); });
if (back_map == nullptr) {
return {};
}
std::vector<ArtifactBlob> artifacts;
artifacts.reserve(digests.size());
for (auto const& digest : digests) {
if (auto value = back_map->GetReference(digest)) {
artifacts.emplace_back(*value.value());
}
}
return artifacts;
}
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