Pull Request for Issue #42537 .

Summary of Changes

Provide a better warning message on package uninstallation when an extension from that package is missing by mentioning the name of that extension in the message.

A new language string is added for this purpose, which is more or less the same as the first part of the existing JLIB_INSTALLER_ERROR_PACK_UNINSTALL_NOT_PROPER string and uses the same parameter.

The package adapter uses the new string in the same way as the JLIB_INSTALLER_ERROR_PACK_UNINSTALL_NOT_PROPER string, i.e. the extensions name is obtained with basename($extension->filename)).

The old language string JLIB_INSTALLER_ERROR_PACK_UNINSTALL_UNKNOWN_EXTENSION is obsolete and therefore deprecated.

Testing Instructions

Packages for new installation and updates and a custom update URL created by Drone for this PR can be found here: https://artifacts.joomla.org/drone/joomla/joomla-cms/4.4-dev/42570/downloads/72522 .

1. Install some 3rd party package extension which contains a few extensions of different type, e.g. a component and some modules or plugins.
2. Uninstall one of these extensions (modules or plugins) from that package.
3. Uninstall the package and check the warning messages.

Actual result BEFORE applying this Pull Request

There is a warning message "Trying to uninstall unknown extension from package. This extension may have already been removed earlier.".

Expected result AFTER applying this Pull Request

There is a warning message which contains the name of the extensions, e.g. "Package Uninstall: This extension is missing or has already been uninstalled: mod_helloworld".

Link to documentations

Please select:

• Documentation link for docs.joomla.org:

• No documentation changes for docs.joomla.org needed

• Pull Request link for manual.joomla.org:

• No documentation changes for manual.joomla.org needed