Function safe_workflow_id

app/workflow/workflow.cpp:135–146

    value = replace_all(value, "${workflow_dir}", context.workflow_dir.string());
    for (const auto & [key, item] : context.values) {
        value = replace_all(value, "${" + key + "}", item);
    }
    return value;
}

std::string safe_workflow_id(std::string value) {
    if (value.empty()) {
        throw std::runtime_error("workflow batch item id must not be empty");
    }
    for (char & ch : value) {
        const unsigned char uch = static_cast<unsigned char>(ch);
        if (std::isalnum(uch) == 0 && ch != '-' && ch != '_') {
            ch = '_';
        }
    }