Function finalize_file

common/hf-cache.cpp:462–503

}

std::string finalize_file(const hf_file & file) {
    static std::atomic<bool> symlinks_disabled{false};

    std::error_code ec;
    fs::path local_path(file.local_path);
    fs::path final_path(file.final_path);

    if (local_path == final_path || fs::exists(final_path, ec)) {
        return file.final_path;
    }

    if (!fs::exists(local_path, ec)) {
        return file.final_path;
    }

    fs::create_directories(final_path.parent_path(), ec);

    if (!symlinks_disabled) {
        fs::path target = fs::relative(local_path, final_path.parent_path(), ec);
        if (!ec) {
            fs::create_symlink(target, final_path, ec);
        }
        if (!ec) {
            return file.final_path;
        }
    }

    if (!symlinks_disabled.exchange(true)) {
        LOG_WRN("%s: failed to create symlink: %s\n", __func__, ec.message().c_str());
        LOG_WRN("%s: switching to degraded mode\n", __func__);
    }

    fs::rename(local_path, final_path, ec);
    if (ec) {
        LOG_WRN("%s: failed to move file to snapshots: %s\n", __func__, ec.message().c_str());
        fs::copy(local_path, final_path, ec);
        if (ec) {
            LOG_ERR("%s: failed to copy file to snapshots: %s\n", __func__, ec.message().c_str());
        }
    }
    return file.final_path;
}

// delete everything after this line, one day