Method install

src/client/client-common/utils/log/logger.cpp:62–119

bool Logger::install(const QString &logFilePath, bool consoleOutput)
{
    QLoggingCategory::setFilterRules("qt.tlsbackend.ossl=false\nqt.network.ssl=false");
    log_utils::paths::deleteOldUnusedLogs();

#ifdef Q_OS_WIN
    std::wstring path = logFilePath.toStdWString();
#else
    std::string path = logFilePath.toStdString();
#endif

    // Initialize spdlog logger
    try
    {
        if (log_utils::isOldLogFormat(path)) {
            // Use the nothrow version of remove since the removal is not critical and we would
            // like to continue with spdlog creation if the removal does fail.
            std::error_code ec;
            std::filesystem::remove(path, ec);
        }
        // Create rotation logger with 2 file with max size 2MB each
        // rotate it on open, the first file is the current log, the 2nd is the previous log
        auto fileSink = std::make_shared<spdlog::sinks::rotating_file_sink_mt>(path, 2 * 1024 * 1024, 1, true);
        auto defaultLogger = std::make_shared<spdlog::logger>("qt", fileSink);
        spdlog::set_default_logger(defaultLogger);

        // Create the logger without formatting for logging output from libraries such as wsnet, which format logs themselves
        auto rawLogger = std::make_shared<spdlog::logger>("raw", fileSink);
        spdlog::register_logger(rawLogger);

        // Also output logs to debugger/stdout for QA/dev use.
#if defined(Q_OS_WIN)
        auto sinkDebug = std::make_shared<spdlog::sinks::msvc_sink_mt>(false);
        spdlog::default_logger()->sinks().push_back(sinkDebug);
        spdlog::get("raw")->sinks().push_back(sinkDebug);
#elif not defined(CLI_ONLY)
        auto sinkDebug = std::make_shared<spdlog::sinks::stdout_sink_mt>();
        sinkDebug->set_level(spdlog::level::trace); // Required to get any output in the terminal on Linux.
        spdlog::default_logger()->sinks().push_back(sinkDebug);
        spdlog::get("raw")->sinks().push_back(sinkDebug);
#endif

        // this will trigger flush on every log message
        spdlog::flush_on(spdlog::level::trace);
        spdlog::set_level(spdlog::level::trace);

        auto formatter = std::make_unique<log_utils::CustomFormatter>(spdlog::details::make_unique<spdlog::pattern_formatter>("{\"tm\": \"%Y-%m-%d %H:%M:%S.%e\", \"lvl\": \"%^%l%$\", %v}"));
        defaultLogger->set_formatter(std::move(formatter));
    }
    catch (const spdlog::spdlog_ex &ex)
    {
        printf("spdlog init failed: %s\n", ex.what());
        return false;
    }

    prevMessageHandler_ = qInstallMessageHandler(myMessageHandler);
    return true;
}