Function Choice

library/cpp/getopt/small/completer.cpp:133–152

    };

    ICompleterPtr Choice(TVector<TChoice> choices) {
        auto bash = TStringBuilder() << "COMPREPLY+=( $(compgen -W '";
        TStringBuf sep = "";
        for (auto& choice : choices) {
            bash << sep << B(choice.Choice);
            sep = " ";
        }
        bash << "' -- ${cur}) )";

        auto action = TStringBuilder();
        action << "((";
        for (auto& choice: choices) {
            action << " " << SS(choice.Choice);
            if (choice.Description) {{
                action << ":" << SS(choice.Description);
            }}
        }
        action << "))";
        return MakeSimpleShared<TSimpleCompleter>(bash, action);
    }

    TString Compgen(TStringBuf flags) {
        return TStringBuilder() << "COMPREPLY+=( $(compgen " << flags << " -- ${cur}) )";