How to find the latest versions of all QML modules - qt

Question

Usually my QML files start with import QtQuick 2.4 and other imports. How can I know which is the latest version of the imported modules without having to guess by type and build?

Answer 1

You basically don't have to know. By importing a particular version, you merely declare that you don't need the additional functionality of any potentially newer version. That doesn't mean that you won't use a newer version if one is available - it simply means that your code will refuse to run if only an older version than the one you need is present.
So, you should only change the imported module version if you happen to use the functionality (members, classes, etc.) from a newer version. That's all. And you will know exactly what version you need, since you're using the functionality you read about in the documentation. The documentation will state what module version it applies to.
The documentation for a given Qt Quick module from the Qt that you're using will state this - no need for release notes.

Answer 2

The QML module version information can be found in a file called plugins.qmltypes.
These files use JSON to store information (as far as I am aware).
In these files Qt uses the "exports" specifier to export the name and version of a module.
Example:
exports: ["QtQuick/Accessible 2.0"]
The example shows the version of the QtQuick.Accessible module.
The plugins.qmltypes are stored in a directory of the same name as base level module.
In the case of the example this would be QtQuick.
Base level modules are grouped under a directory titled qml.
That is "usually" located in a directory called qtx (in some case Qt).
Where x is the installed major version of Qt (in my case it would be qt5).
That means the plugins.qmltypes has a path that looks something like this:
/qt5/qml/QtQuick/plugins.qmltypes
The reason im explaining this bottoms up cause the rest of the path is dependent on how you installed Qt:
Package manager (portage) amd64 install path:
/usr/lib64/qt5/qml/
pip PySide6 install path:
~/.local/lib/python3.9/site-packages/PySide6/Qt/qml/
pip PyQt6 install path:
~/.local/lib/python3.9/site-packages/PyQt6/Qt6/qml
~/.local/lib/python3.9/site-packages/PyQt6/Qt6/qml
Package manager (apt) aarch64 install path:
/usr/lib64/aarch64-{forgot this part}-/qt5/qml/
I figure the version out in bulk with:
grep -r "exports:.*\\]" <insert install/OS dependent path>/qml/* | less
This doesnt grab multiple exports that are spread over multiple lines thought.
Since QML comes in 2 major versions when in doubt you could import version 1.0 or 2.0.