noarch version from spec to QML

project.pro

...

system(echo "\\\{\\\"version\\\":\\\"$${SPECVERSION}\\\"\\\}" > qml/version.json)

...

project.qml

ApplicationWindow
{
    ..blaa..
    property var application

    Component.onCompleted:
    {
        var xhr = new XMLHttpRequest
        xhr.onreadystatechange = (function(myxhr)
        {
            return function()
            {
                if (myxhr.readyState === 4)
                    {
                        application = JSON.parse(myxhr.responseText)
                    }
            }
        })(xhr);
        xhr.open("GET", Qt.resolvedUrl("version.json"), true)
        xhr.send();
    }
    ...blaa...
}

use e.g.

text: "version: " + application.version

project.spec

...

%qtc_qmake5 SPECVERSION=%{version}

...