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// Copyright 2025 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/common/artifact_blob.hpp"
#include <exception>
#include <optional>
#include "fmt/core.h"
#include "src/buildtool/common/artifact_digest_factory.hpp"
#include "src/buildtool/file_system/file_system_manager.hpp"
#include "src/utils/cpp/hash_combine.hpp"
#include "src/utils/cpp/in_place_visitor.hpp"
namespace {
[[nodiscard]] auto ReadFromFile(std::filesystem::path const& file) noexcept
-> std::shared_ptr<std::string const> {
auto content = FileSystemManager::ReadFile(file);
if (not content.has_value()) {
return nullptr;
}
return std::make_shared<std::string const>(*std::move(content));
}
} // namespace
auto ArtifactBlob::FromMemory(HashFunction hash_function,
ObjectType type,
std::string content) noexcept
-> expected<ArtifactBlob, std::string> {
try {
auto digest = IsTreeObject(type)
? ArtifactDigestFactory::HashDataAs<ObjectType::Tree>(
hash_function, content)
: ArtifactDigestFactory::HashDataAs<ObjectType::File>(
hash_function, content);
return ArtifactBlob{
std::move(digest),
std::make_shared<std::string const>(std::move(content)),
IsExecutableObject(type)};
} catch (const std::exception& e) {
return unexpected{fmt::format(
"ArtifactBlob::FromMemory: Got an exception:\n{}", e.what())};
} catch (...) {
return unexpected<std::string>{
"ArtifactBlob::FromMemory: Got an unknown exception"};
}
}
auto ArtifactBlob::FromFile(HashFunction hash_function,
ObjectType type,
std::filesystem::path file) noexcept
-> expected<ArtifactBlob, std::string> {
try {
if (not FileSystemManager::IsFile(file)) {
return unexpected{
fmt::format("ArtifactBlob::FromFile: Not a regular file:\n{}",
file.string())};
}
auto digest = IsTreeObject(type)
? ArtifactDigestFactory::HashFileAs<ObjectType::Tree>(
hash_function, file)
: ArtifactDigestFactory::HashFileAs<ObjectType::File>(
hash_function, file);
if (not digest.has_value()) {
return unexpected{fmt::format(
"ArtifactBlob::FromFile: Failed to hash {}", file.string())};
}
return ArtifactBlob{
*std::move(digest), std::move(file), IsExecutableObject(type)};
} catch (const std::exception& e) {
return unexpected{fmt::format(
"ArtifactBlob::FromFile: Got an exception while processing {}:\n{}",
file.string(),
e.what())};
} catch (...) {
return unexpected{
fmt::format("ArtifactBlob::FromFile: Got an unknown exception "
"while processing {}",
file.string())};
}
}
auto ArtifactBlob::FromTempFile(HashFunction hash_function,
ObjectType type,
TmpFile::Ptr file) noexcept
-> expected<ArtifactBlob, std::string> {
try {
if (file == nullptr) {
return unexpected<std::string>{
"ArtifactBlob::CreateFromTempFile: missing temp file."};
}
auto digest = IsTreeObject(type)
? ArtifactDigestFactory::HashFileAs<ObjectType::Tree>(
hash_function, file->GetPath())
: ArtifactDigestFactory::HashFileAs<ObjectType::File>(
hash_function, file->GetPath());
if (not digest.has_value()) {
return unexpected{fmt::format(
"ArtifactBlob::CreateFromTempFile: Failed to hash {}",
file->GetPath().string())};
}
return ArtifactBlob{
*std::move(digest), std::move(file), IsExecutableObject(type)};
} catch (const std::exception& e) {
return unexpected{fmt::format(
"ArtifactBlob::FromTempFile: Got an exception:\n{}", e.what())};
} catch (...) {
return unexpected<std::string>{
"ArtifactBlob::FromTempFile: Got an unknown exception."};
}
}
auto ArtifactBlob::FromTempFile(HashFunction hash_type,
ObjectType type,
TmpDir::Ptr const& temp_space,
std::string const& content) noexcept
-> expected<ArtifactBlob, std::string> {
try {
if (temp_space == nullptr) {
return unexpected<std::string>{
"ArtifactBlob::FromTempFile: missing temp space."};
}
auto file = TmpDir::CreateFile(temp_space);
if (file == nullptr) {
return unexpected<std::string>{
"ArtifactBlob::FromTempFile: failed to create a new temp "
"file."};
}
if (not FileSystemManager::WriteFile(content, file->GetPath())) {
return unexpected<std::string>{
"ArtifactBlob::FromTempFile: failed to write content to a "
"temp file."};
}
return FromTempFile(hash_type, type, std::move(file));
} catch (const std::exception& e) {
return unexpected{fmt::format(
"ArtifactBlob::FromTempFile: Got an exception:\n{}", e.what())};
} catch (...) {
return unexpected<std::string>{
"ArtifactBlob::FromTempFile: Got an unknown exception."};
}
}
auto ArtifactBlob::ReadContent() const noexcept
-> std::shared_ptr<std::string const> {
using Result = std::shared_ptr<std::string const>;
static constexpr InPlaceVisitor kVisitor{
[](InMemory const& value) -> Result { return value; },
[](InFile const& value) -> Result { return ::ReadFromFile(value); },
[](InTempFile const& value) -> Result {
return ::ReadFromFile(value->GetPath());
},
};
try {
return std::visit(kVisitor, content_);
} catch (...) {
return nullptr;
}
}
auto ArtifactBlob::ReadIncrementally(std::size_t chunk_size) const& noexcept
-> expected<IncrementalReader, std::string> {
using Result = expected<IncrementalReader, std::string>;
const InPlaceVisitor visitor{
[chunk_size](InMemory const& value) -> Result {
if (value == nullptr) {
return unexpected<std::string>{
"ArtifactBlob::ReadIncrementally: missing memory source"};
}
return IncrementalReader::FromMemory(chunk_size, value.get());
},
[chunk_size](InFile const& value) -> Result {
return IncrementalReader::FromFile(chunk_size, value);
},
[chunk_size](InTempFile const& value) -> Result {
return IncrementalReader::FromFile(chunk_size, value->GetPath());
},
};
try {
return std::visit(visitor, content_);
} catch (std::exception const& e) {
return unexpected{fmt::format(
"ArtifactBlob::ReadIncrementally: Got an exception:\n{}",
e.what())};
} catch (...) {
return unexpected<std::string>{
"ArtifactBlob::ReadIncrementally: Got an unknown exception"};
}
}
namespace std {
auto hash<ArtifactBlob>::operator()(ArtifactBlob const& blob) const noexcept
-> std::size_t {
std::size_t seed{};
hash_combine(&seed, blob.GetDigest());
hash_combine(&seed, blob.IsExecutable());
return seed;
}
} // namespace std
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