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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/storage/compactification_task.hpp"
#include <atomic>
#include <optional>
#include <unordered_map>
#include <utility> //std::move
#include <vector>
#include "gsl/gsl"
#include "src/buildtool/file_system/file_system_manager.hpp"
#include "src/buildtool/file_system/object_type.hpp"
#include "src/buildtool/multithreading/task_system.hpp"
namespace {
[[nodiscard]] auto GetObjectTask(CompactificationTask const& task,
ObjectType type) noexcept
-> CompactificationTask::ObjectTask const&;
[[nodiscard]] auto GetFilterTypes(CompactificationTask const& task) noexcept
-> std::vector<ObjectType>;
using FilterResult = std::optional<std::vector<std::filesystem::path>>;
[[nodiscard]] auto FilterEntries(CompactificationTask const& task,
ObjectType type) noexcept -> FilterResult;
} // namespace
[[nodiscard]] auto CompactifyConcurrently(
CompactificationTask const& task) noexcept -> bool {
std::atomic_bool failed = false;
std::unordered_map<ObjectType, FilterResult> scan_results;
{
TaskSystem ts;
// Filter entries to create execution tasks:
for (auto type : GetFilterTypes(task)) {
try {
auto tstask =
[result = &scan_results[type], &failed, type, &task] {
*result = ::FilterEntries(task, type);
if (not *result) {
failed = true;
}
};
ts.QueueTask(std::move(tstask));
} catch (...) {
ts.Shutdown();
return false;
}
}
}
// Init compactification tasks:
if (not failed) {
TaskSystem ts;
for (auto const& [type, subtasks] : scan_results) {
auto const& task_callback = GetObjectTask(task, type);
for (auto const& entry : *subtasks) {
try {
auto tstask = [&failed, &task, &task_callback, &entry] {
if (not failed and
not std::invoke(task_callback, task, entry)) {
failed = true;
}
};
ts.QueueTask(std::move(tstask));
} catch (...) {
ts.Shutdown();
return false;
}
}
}
}
return not failed;
}
namespace {
[[nodiscard]] auto GetObjectTask(CompactificationTask const& task,
ObjectType type) noexcept
-> CompactificationTask::ObjectTask const& {
switch (type) {
case ObjectType::Symlink:
case ObjectType::File:
return task.f_task;
case ObjectType::Executable:
return task.x_task;
case ObjectType::Tree:
return task.t_task;
}
Ensures(false); // unreachable
}
[[nodiscard]] auto GetFilterTypes(CompactificationTask const& task) noexcept
-> std::vector<ObjectType> {
return task.large ? std::vector{ObjectType::File, ObjectType::Tree}
: std::vector{ObjectType::File,
ObjectType::Tree,
ObjectType::Executable};
}
[[nodiscard]] auto FilterEntries(CompactificationTask const& task,
ObjectType type) noexcept -> FilterResult {
std::vector<std::filesystem::path> result;
auto const& storage_root = task.cas.StorageRoot(type, task.large);
// Check there are entries to process:
if (not FileSystemManager::IsDirectory(storage_root)) {
return result;
}
FileSystemManager::UseDirEntryFunc callback =
[&task, &storage_root, &result](std::filesystem::path const& entry,
bool /*unused*/) -> bool {
// Filter entries:
try {
if (std::invoke(task.filter, storage_root / entry)) {
result.push_back(entry);
}
} catch (...) {
return false;
}
return true;
};
// Read the ObjectType storage directory:
if (not FileSystemManager::ReadDirectoryEntriesRecursive(storage_root,
callback)) {
result.clear();
task.Log(LogLevel::Error,
"Scanning: Failed to read {}",
storage_root.string());
return std::nullopt;
}
return result;
}
} // namespace
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