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#include "src/buildtool/execution_api/local/local_api.hpp"
namespace {
[[nodiscard]] auto ReadDirectory(
gsl::not_null<LocalStorage const*> const& storage,
bazel_re::Digest const& digest) noexcept
-> std::optional<bazel_re::Directory> {
if (auto const path = storage->BlobPath(digest, /*is_executable=*/false)) {
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;
}
[[nodiscard]] auto ReadGitTree(
gsl::not_null<LocalStorage const*> const& storage,
bazel_re::Digest const& digest) noexcept
-> std::optional<GitCAS::tree_entries_t> {
if (auto const path = storage->TreePath(digest)) {
if (auto const content = FileSystemManager::ReadFile(*path)) {
return GitCAS::ReadTreeData(
*content,
HashFunction::ComputeTreeHash(*content).Bytes(),
/*is_hex_id=*/false);
}
}
Logger::Log(LogLevel::Error, "Tree {} not found in CAS", digest.hash());
return std::nullopt;
}
[[nodiscard]] auto DumpToStream(gsl::not_null<FILE*> const& stream,
std::optional<std::string> const& data) noexcept
-> bool {
if (data) {
std::fwrite(data->data(), 1, data->size(), stream);
return true;
}
return false;
}
[[nodiscard]] auto TreeToStream(
gsl::not_null<LocalStorage const*> const& storage,
bazel_re::Digest const& tree_digest,
gsl::not_null<FILE*> const& stream) noexcept -> bool {
if (Compatibility::IsCompatible()) {
if (auto dir = ReadDirectory(storage, tree_digest)) {
return DumpToStream(stream,
BazelMsgFactory::DirectoryToString(*dir));
}
}
else {
if (auto entries = ReadGitTree(storage, tree_digest)) {
return DumpToStream(stream,
BazelMsgFactory::GitTreeToString(*entries));
}
}
return false;
}
[[nodiscard]] auto BlobToStream(
gsl::not_null<LocalStorage const*> const& storage,
Artifact::ObjectInfo const& blob_info,
gsl::not_null<FILE*> const& stream) noexcept -> bool {
constexpr std::size_t kChunkSize{512};
auto path =
storage->BlobPath(blob_info.digest, IsExecutableObject(blob_info.type));
if (not path and not Compatibility::IsCompatible()) {
// in native mode, lookup object in tree cas to dump tree as blob
path = storage->TreePath(blob_info.digest);
}
if (path) {
std::string data(kChunkSize, '\0');
if (gsl::owner<FILE*> in = std::fopen(path->c_str(), "rb")) {
while (auto size = std::fread(data.data(), 1, kChunkSize, in)) {
std::fwrite(data.data(), 1, size, stream);
}
std::fclose(in);
return true;
}
}
return false;
}
} // namespace
auto LocalStorage::ReadTreeInfos(
bazel_re::Digest const& tree_digest,
std::filesystem::path const& parent) const noexcept
-> std::optional<std::pair<std::vector<std::filesystem::path>,
std::vector<Artifact::ObjectInfo>>> {
std::vector<std::filesystem::path> paths{};
std::vector<Artifact::ObjectInfo> infos{};
auto store_info = [&paths, &infos](auto path, auto info) {
paths.emplace_back(path);
infos.emplace_back(info);
return true;
};
if (ReadObjectInfosRecursively(store_info, parent, tree_digest)) {
return std::make_pair(std::move(paths), std::move(infos));
}
return std::nullopt;
}
// NOLINTNEXTLINE(misc-no-recursion)
auto LocalStorage::ReadObjectInfosRecursively(
BazelMsgFactory::InfoStoreFunc const& store_info,
std::filesystem::path const& parent,
bazel_re::Digest const& digest) const noexcept -> bool {
// read from in-memory tree map
if (tree_map_) {
auto const* tree = tree_map_->GetTree(digest);
if (tree != nullptr) {
return std::all_of(
tree->begin(),
tree->end(),
// NOLINTNEXTLINE(misc-no-recursion)
[this, &store_info, &parent](auto const& entry) {
try {
auto const& [path, info] = entry;
return IsTreeObject(info->type)
? ReadObjectInfosRecursively(store_info,
parent / path,
info->digest)
: store_info(parent / path, *info);
} catch (...) { // satisfy clang-tidy, store_info() could
return false;
}
});
}
Logger::Log(
LogLevel::Debug, "tree {} not found in tree map", digest.hash());
}
// fallback read from CAS and cache it in in-memory tree map
if (Compatibility::IsCompatible()) {
if (auto dir = ReadDirectory(this, digest)) {
auto tree = tree_map_ ? std::make_optional(tree_map_->CreateTree())
: std::nullopt;
return BazelMsgFactory::ReadObjectInfosFromDirectory(
*dir,
[this, &store_info, &parent, &tree](auto path,
auto info) {
return (not tree or tree->AddInfo(path, info)) and
(IsTreeObject(info.type)
? ReadObjectInfosRecursively(
store_info,
parent / path,
info.digest)
: store_info(parent / path, info));
}) and
(not tree_map_ or
tree_map_->AddTree(digest, std::move(*tree)));
}
}
else {
if (auto entries = ReadGitTree(this, digest)) {
auto tree = tree_map_ ? std::make_optional(tree_map_->CreateTree())
: std::nullopt;
return BazelMsgFactory::ReadObjectInfosFromGitTree(
*entries,
[this, &store_info, &parent, &tree](auto path,
auto info) {
return (not tree or tree->AddInfo(path, info)) and
(IsTreeObject(info.type)
? ReadObjectInfosRecursively(
store_info,
parent / path,
info.digest)
: store_info(parent / path, info));
}) and
(not tree_map_ or
tree_map_->AddTree(digest, std::move(*tree)));
}
}
return false;
}
auto LocalStorage::DumpToStream(Artifact::ObjectInfo const& info,
gsl::not_null<FILE*> const& stream,
bool raw_tree) const noexcept -> bool {
return IsTreeObject(info.type) and not raw_tree
? TreeToStream(this, info.digest, stream)
: BlobToStream(this, info, stream);
}
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