Method operator()

launcher/FileSystem.cpp:318–386

* @brief Copies a directory and it's contents from src to dest * @param offset subdirectory form src to copy to dest * @return if there was an error during the filecopy */

 * @return if there was an error during the filecopy
 */
bool copy::operator()(const QString& offset, bool dryRun)
{
    using copy_opts = fs::copy_options;
    m_copied = 0;  // reset counter
    m_failedPaths.clear();

// NOTE always deep copy on windows. the alternatives are too messy.
#if defined Q_OS_WIN32
    m_followSymlinks = true;
#endif

    auto src = PathCombine(m_src.absolutePath(), offset);
    auto dst = PathCombine(m_dst.absolutePath(), offset);

    std::error_code err;

    fs::copy_options opt = copy_opts::none;

    // The default behavior is to follow symlinks
    if (!m_followSymlinks)
        opt |= copy_opts::copy_symlinks;

    if (m_overwrite)
        opt |= copy_opts::overwrite_existing;

    // Function that'll do the actual copying
    auto copy_file = [&](QString src_path, QString relative_dst_path) {
        if (m_matcher && (m_matcher->matches(relative_dst_path) != m_whitelist))
            return;

        auto dst_path = PathCombine(dst, relative_dst_path);
        if (!dryRun) {
            ensureFilePathExists(dst_path);
#ifdef Q_OS_WIN32
            copyFolderAttributes(src, dst, relative_dst_path);
#endif
            fs::copy(StringUtils::toStdString(src_path), StringUtils::toStdString(dst_path), opt, err);
        }
        if (err) {
            qWarning() << "Failed to copy files:" << QString::fromStdString(err.message());
            qDebug() << "Source file:" << src_path;
            qDebug() << "Destination file:" << dst_path;
            m_failedPaths.append(dst_path);
            emit copyFailed(relative_dst_path);
            return;
        }
        m_copied++;
        emit fileCopied(relative_dst_path);
    };

    // We can't use copy_opts::recursive because we need to take into account the
    // blacklisted paths, so we iterate over the source directory, and if there's no blacklist
    // match, we copy the file.
    QDir src_dir(src);
    QDirIterator source_it(src, QDir::Filter::Files | QDir::Filter::Hidden, QDirIterator::Subdirectories);

    while (source_it.hasNext()) {
        auto src_path = source_it.next();