QProcess process;
process.setProcessChannelMode(QProcess::SeparateChannels);    
process.start("qmllint", {"PUT_PATH_TO_QML_FILE_WITH_ERRORS_HERE"});
if (!process.waitForFinished()) {
  process.kill();
  qDebug() << "QMLLINT didn't finish";
}
if (process.exitStatus() != QProcess::NormalExit) {
  qDebug() << "QMLLINT wrong exit";
}

QString output = process.readAllStandardOutput();
QString error = process.readAllStandardError();

qDebug() << "QMLLINT qmllint output: " << output;
qDebug() << "QMLLINT qmllint errors: " << error; 

import QtQuick 2.15
import QtQuick.Window 2.15Window {
    visible: true
    width: 640
    height: 480
    title: qsTr("Hello World")
    Rectangle {
        id: rect
        width: 100
        height: 100
        color: "ble"
        MouseArea {
            anchors. + fill: pant
            onClicked: {
                console.log(rect.x)
                console.log(ry)
                console.log(rect.width)
                console.log(rect.height)        }
    }
} 

import QtQuick 2.15Item {id: root
width: 100
height: 100rectangle {
    id: rectangle
    anchors.fill: parent
    color: "blue"    MouseArea {
        anchors.fill: parent
        onClicked: {
            rectangle.color = Qt.rgba(Math.random(), Math.random(), Math.random(), 1);
        }
    }
}
}