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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/local/local_cas_reader.hpp"
#include <cstdio>
#include <memory>
#include "gsl/gsl"
#include "src/buildtool/crypto/hash_function.hpp"
#include "src/buildtool/execution_api/bazel_msg/bazel_msg_factory.hpp"
#include "src/buildtool/file_system/file_system_manager.hpp"
#include "src/buildtool/logging/log_level.hpp"
#include "src/buildtool/logging/logger.hpp"
#include "src/utils/cpp/path.hpp"
auto LocalCasReader::ReadDirectory(ArtifactDigest const& digest) const noexcept
-> std::optional<bazel_re::Directory> {
if (auto const path = cas_.TreePath(digest)) {
if (auto const content = FileSystemManager::ReadFile(*path)) {
return BazelMsgFactory::MessageFromString<bazel_re::Directory>(
*content);
}
}
Logger::Log(
LogLevel::Error, "Directory {} not found in CAS", digest.hash());
return std::nullopt;
}
auto LocalCasReader::ReadGitTree(ArtifactDigest const& digest) const noexcept
-> std::optional<GitRepo::tree_entries_t> {
if (auto const path = cas_.TreePath(digest)) {
if (auto const content = FileSystemManager::ReadFile(*path)) {
auto check_symlinks =
[this](std::vector<bazel_re::Digest> const& ids) {
for (auto const& id : ids) {
auto link_path = cas_.BlobPath(id,
/*is_executable=*/false);
if (not link_path) {
return false;
}
// in the local CAS we store as files
auto content = FileSystemManager::ReadFile(*link_path);
if (not content or not PathIsNonUpwards(*content)) {
return false;
}
}
return true;
};
return GitRepo::ReadTreeData(
*content,
HashFunction::ComputeTreeHash(*content).Bytes(),
check_symlinks,
/*is_hex_id=*/false);
}
}
Logger::Log(LogLevel::Debug, "Tree {} not found in CAS", digest.hash());
return std::nullopt;
}
auto LocalCasReader::DumpRawTree(Artifact::ObjectInfo const& info,
DumpCallback const& dumper) const noexcept
-> bool {
auto path = cas_.TreePath(info.digest);
return path ? DumpRaw(*path, dumper) : false;
}
auto LocalCasReader::DumpBlob(Artifact::ObjectInfo const& info,
DumpCallback const& dumper) const noexcept
-> bool {
auto path = cas_.BlobPath(info.digest, IsExecutableObject(info.type));
return path ? DumpRaw(*path, dumper) : false;
}
auto LocalCasReader::DumpRaw(std::filesystem::path const& path,
DumpCallback const& dumper) noexcept -> bool {
auto closer = [](gsl::owner<FILE*> file) -> void {
if (file != nullptr) {
std::fclose(file);
}
};
auto in = std::shared_ptr<FILE>{std::fopen(path.c_str(), "rb"), closer};
if (not in) {
return false;
}
constexpr std::size_t kChunkSize{512};
std::string buffer(kChunkSize, '\0');
while (auto size = std::fread(buffer.data(), 1, buffer.size(), in.get())) {
try {
buffer.resize(size);
if (not std::invoke(dumper, buffer)) {
return false;
}
} catch (...) {
return false;
}
}
return true;
}
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