Method extractStageOptions

pdal/Kernel.cpp:137–171

StringList Kernel::extractStageOptions(const StringList& cmdArgs)
{
    StringList stringArgs;
    OptionsMap& stageOptions = m_manager.stageOptions();

    // Scan the argument vector for extra stage options.  Pull them out and
    // stick them in the list.  Let the ProgramArgs handle everything else.
    // NOTE: This depends on the format being "option=value" rather than
    //   "option value".  This is what we've always expected, so no problem,
    //   but it would be better to be more flexible.
    for (auto it = cmdArgs.begin(); it != cmdArgs.end(); ++it)
    {
        const std::string& cmd = *it;

        std::string stageName, opName, value;
        auto res = parseStageOption(cmd, stageName, opName, value);
        if (res == ParseStageResult::Unknown)
            stringArgs.push_back(cmd);
        else if (res == ParseStageResult::Invalid)
            throw pdal_error("Stage option '" + cmd + "' not valid.");
        else  // ParseStageResult::Ok
        {
            if (value.empty())
            {
                if (++it == cmdArgs.end())
                    throw pdal_error("Stage option '" + stageName + "." +
                        opName + "' has no value.");
                value = *it;
            }
            Option op(opName, value);
            stageOptions[stageName].add(op);
        }
    }
    return stringArgs;
}

bool Kernel::doSwitches(const StringList& cmdArgs, ProgramArgs& args)
{