Function create_default_seq

src/utility/src/sequence.cpp:249–287

std::optional<DefaultSequenceHelper> create_default_seq(const Entry &entry) {
    std::cmatch m;
    try {
        static const std::regex bare_number(R"(()([-]?\d+)())", std::regex::optimize);
        static const std::regex number_and_ext(R"(()([-]?\d+)(\.[^.]+))", std::regex::optimize);
        static const std::regex body_dot_number_and_double_ext(
            R"((.+\.)([-]?\d+)(\.[^.\d]{1,4}\.[^.]{1,3}))", std::regex::optimize);
        static const std::regex body_dot_number_and_ext(
            R"((.+\.)([-]?\d+)(\.[^.]+))", std::regex::optimize);
        static const std::regex body_no_dot_number_and_ext(
            R"((.+[^0-9])(\d+)(\.[^.]+))", std::regex::optimize);

        if (std::regex_match(entry.name_.c_str(), m, bare_number) or
            std::regex_match(entry.name_.c_str(), m, number_and_ext) or
            std::regex_match(entry.name_.c_str(), m, body_dot_number_and_double_ext) or
            std::regex_match(entry.name_.c_str(), m, body_dot_number_and_ext) or
            std::regex_match(entry.name_.c_str(), m, body_no_dot_number_and_ext)) {

            // skip versions..
            if (ends_with(m[1].str(), "_v"))
                return {};
            DefaultSequenceHelper seq;
            seq.head_ = escape_percentage(m[1].str());
            seq.tail_ = escape_percentage(m[3].str());
            seq.name_ = seq.head_ + "#" + seq.tail_;
            seq.frames_.insert(std::atoi(m[2].str().c_str()));
            seq.frame_str_ = m[2].str();
            seq.pad_       = pad_size(m[2].str());
            seq.pad_str_   = pad_spec(seq.pad_);
            seq.entries_.push_back(entry);
            return seq;
        }

        return {};
    } catch (const std::exception &err) {
        spdlog::warn("{} {}", __PRETTY_FUNCTION__, err.what());
    }
    return {};
}

std::vector<Sequence> default_collapse_sequences(const std::vector<Entry> &entries) {
    // collapse sequences that are part of a collection.