Function expandVariables

launcher/launch/LaunchTask.cpp:257–308

}

QString expandVariables(const QString& input, QProcessEnvironment dict)
{
    QString result = input;

    enum { base, maybeBrace, variable, brace } state = base;
    int startIdx = -1;
    for (int i = 0; i < result.length();) {
        QChar c = result.at(i++);
        switch (state) {
            case base:
                if (c == '$')
                    state = maybeBrace;
                break;
            case maybeBrace:
                if (c == '{') {
                    state = brace;
                    startIdx = i;
                } else if (c.isLetterOrNumber() || c == '_') {
                    state = variable;
                    startIdx = i - 1;
                } else {
                    state = base;
                }
                break;
            case brace:
                if (c == '}') {
                    const auto res = dict.value(result.mid(startIdx, i - 1 - startIdx), "");
                    if (!res.isEmpty()) {
                        result.replace(startIdx - 2, i - startIdx + 2, res);
                        i = startIdx - 2 + res.length();
                    }
                    state = base;
                }
                break;
            case variable:
                if (!c.isLetterOrNumber() && c != '_') {
                    const auto res = dict.value(result.mid(startIdx, i - startIdx - 1), "");
                    if (!res.isEmpty()) {
                        result.replace(startIdx - 1, i - startIdx, res);
                        i = startIdx - 1 + res.length();
                    }
                    state = base;
                }
                break;
        }
    }
    if (state == variable) {
        if (const auto res = dict.value(result.mid(startIdx), ""); !res.isEmpty())
            result.replace(startIdx - 1, result.length() - startIdx + 1, res);
    }
    return result;
}

QString LaunchTask::substituteVariables(QString& cmd, bool isLaunch) const
{