From 04765b75fd186329755695a9afba906edfcda135 Mon Sep 17 00:00:00 2001
From: Klaus Aehlig <klaus.aehlig@huawei.com>
Date: Thu, 20 Feb 2025 13:15:38 +0100
Subject: Separate off id generation to a separate library

... and rename appropriately to reflect contents more precisely
than the generic "common". This separation also disentangles
dependencies a bit.
---
 .../execution_api/common/execution_common.hpp      | 132 ---------------------
 1 file changed, 132 deletions(-)
 delete mode 100644 src/buildtool/execution_api/common/execution_common.hpp

(limited to 'src/buildtool/execution_api/common/execution_common.hpp')

diff --git a/src/buildtool/execution_api/common/execution_common.hpp b/src/buildtool/execution_api/common/execution_common.hpp
deleted file mode 100644
index 7a55003c..00000000
--- a/src/buildtool/execution_api/common/execution_common.hpp
+++ /dev/null
@@ -1,132 +0,0 @@
-// Copyright 2022 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.
-
-#ifndef INCLUDED_SRC_BUILDTOOL_EXECUTION_API_COMMON_EXECUTION_COMMON_HPP
-#define INCLUDED_SRC_BUILDTOOL_EXECUTION_API_COMMON_EXECUTION_COMMON_HPP
-
-#ifdef __unix__
-#include <sys/types.h>
-#include <unistd.h>
-#else
-#error "Non-unix is not supported yet"
-#endif
-
-#include <array>
-#include <cstddef>
-#include <cstdint>
-#include <exception>
-#include <filesystem>
-#include <optional>
-#include <random>
-#include <sstream>
-#include <string>
-#include <thread>
-
-#include "fmt/core.h"
-#include "gsl/gsl"
-#include "src/buildtool/crypto/hash_function.hpp"
-#include "src/buildtool/logging/log_level.hpp"
-#include "src/buildtool/logging/logger.hpp"
-#include "src/utils/cpp/gsl.hpp"
-#include "src/utils/cpp/hex_string.hpp"
-
-/// \brief Create unique ID for current process and thread.
-[[nodiscard]] static inline auto CreateProcessUniqueId() noexcept
-    -> std::optional<std::string> {
-#ifdef __unix__
-    pid_t pid{};
-    try {
-        pid = getpid();
-    } catch (std::exception const& e) {
-        Logger::Log(LogLevel::Error, e.what());
-        return std::nullopt;
-    }
-#endif
-    auto tid = std::this_thread::get_id();
-    std::ostringstream id{};
-    id << pid << "-" << tid;
-    return id.str();
-}
-
-/// \brief Create unique path based on file_path.
-[[nodiscard]] static inline auto CreateUniquePath(
-    std::filesystem::path file_path) noexcept
-    -> std::optional<std::filesystem::path> {
-    auto id = CreateProcessUniqueId();
-    if (id) {
-        return file_path.concat("." + *id);
-    }
-    return std::nullopt;
-}
-
-[[nodiscard]] static auto GetNonDeterministicRandomNumber() -> unsigned int {
-    std::uniform_int_distribution<unsigned int> dist{};
-    std::random_device urandom{
-#ifdef __unix__
-        "/dev/urandom"
-#endif
-    };
-    return dist(urandom);
-}
-
-static auto const kRandomConstant = GetNonDeterministicRandomNumber();
-
-static void EncodeUUIDVersion4(std::string* uuid) {
-    constexpr auto kVersionByte = 6UL;
-    constexpr auto kVersionBits = 0x40U;  // version 4: 0100 xxxx
-    constexpr auto kClearMask = 0x0fU;
-    Expects(uuid->size() >= kVersionByte);
-    auto& byte = uuid->at(kVersionByte);
-    byte = static_cast<char>(kVersionBits |
-                             (kClearMask & static_cast<std::uint8_t>(byte)));
-}
-
-static void EncodeUUIDVariant1(std::string* uuid) {
-    constexpr auto kVariantByte = 8UL;
-    constexpr auto kVariantBits = 0x80U;  // variant 1: 10xx xxxx
-    constexpr auto kClearMask = 0x3fU;
-    Expects(uuid->size() >= kVariantByte);
-    auto& byte = uuid->at(kVariantByte);
-    byte = static_cast<char>(kVariantBits |
-                             (kClearMask & static_cast<std::uint8_t>(byte)));
-}
-
-/// \brief Create UUID version 4 from seed.
-[[nodiscard]] static inline auto CreateUUIDVersion4(std::string const& seed)
-    -> std::string {
-    constexpr auto kRawLength = 16UL;
-    constexpr auto kHexDashPos = std::array{8UL, 12UL, 16UL, 20UL};
-
-    // The type of HashFunction is irrelevant here. It is used for
-    // identification purposes only. SHA256 is used.
-    HashFunction const hash_function{HashFunction::Type::PlainSHA256};
-    auto value = fmt::format("{}-{}", std::to_string(kRandomConstant), seed);
-    auto uuid = hash_function.PlainHashData(value).Bytes();
-    EncodeUUIDVersion4(&uuid);
-    EncodeUUIDVariant1(&uuid);
-    Expects(uuid.size() >= kRawLength);
-
-    std::size_t cur{};
-    std::ostringstream ss{};
-    auto uuid_hex = ToHexString(uuid.substr(0, kRawLength));
-    for (auto pos : kHexDashPos) {
-        ss << uuid_hex.substr(cur, pos - cur) << '-';
-        cur = pos;
-    }
-    ss << uuid_hex.substr(cur);
-    EnsuresAudit(ss.str().size() == (2 * kRawLength) + kHexDashPos.size());
-    return ss.str();
-}
-
-#endif  // INCLUDED_SRC_BUILDTOOL_EXECUTION_API_COMMON_EXECUTION_COMMON_HPP
-- 
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