Method executeTask

launcher/launch/steps/CheckJava.cpp:44–112

#include <sys.h>

void CheckJava::executeTask()
{
    auto instance = m_parent->instance();
    auto settings = instance->settings();
    m_javaPath = FS::ResolveExecutable(settings->get("JavaPath").toString());
    bool perInstance = settings->get("OverrideJava").toBool() || settings->get("OverrideJavaLocation").toBool();

    auto realJavaPath = QStandardPaths::findExecutable(m_javaPath);
    if (realJavaPath.isEmpty())
    {
        if (perInstance)
        {
            emit logLine(
                QString("The java binary \"%1\" couldn't be found. Please fix the java path "
                   "override in the instance's settings or disable it.").arg(m_javaPath),
                MessageLevel::Warning);
        }
        else
        {
            emit logLine(QString("The java binary \"%1\" couldn't be found. Please set up java in "
                            "the settings.").arg(m_javaPath),
                         MessageLevel::Warning);
        }
        emitFailed(QString("Java path is not valid."));
        return;
    }
    else
    {
        emit logLine("Java path is:\n" + m_javaPath + "\n\n", MessageLevel::Launcher);
    }

    if (JavaUtils::getJavaCheckPath().isEmpty())
    {
        const char *reason = QT_TR_NOOP("Java checker library could not be found. Please check your installation.");
        emit logLine(tr(reason), MessageLevel::Fatal);
        emitFailed(tr(reason));
        return;
    }

    QFileInfo javaInfo(realJavaPath);
    qlonglong javaUnixTime = javaInfo.lastModified().toMSecsSinceEpoch();
    auto storedUnixTime = settings->get("JavaTimestamp").toLongLong();
    auto storedArchitecture = settings->get("JavaArchitecture").toString();
    auto storedRealArchitecture = settings->get("JavaRealArchitecture").toString();
    auto storedVersion = settings->get("JavaVersion").toString();
    auto storedVendor = settings->get("JavaVendor").toString();
    m_javaUnixTime = javaUnixTime;
    // if timestamps are not the same, or something is missing, check!
    if (javaUnixTime != storedUnixTime || storedVersion.size() == 0
        || storedArchitecture.size() == 0 || storedRealArchitecture.size() == 0
        || storedVendor.size() == 0)
    {
        m_JavaChecker = new JavaChecker();
        emit logLine(QString("Checking Java version..."), MessageLevel::Launcher);
        connect(m_JavaChecker.get(), &JavaChecker::checkFinished, this, &CheckJava::checkJavaFinished);
        m_JavaChecker->m_path = realJavaPath;
        m_JavaChecker->performCheck();
        return;