[4.0] Improve the cli command discover

[ghost]

Pull Request for Issue #32967 .

Summary of Changes

I have corrected the misleading duplicate consoles outputs mentioned in #32967 and I have added a task to install and a task to list the detected extensions.

Testing Instructions

Run

php cli/joomla.php extension:discover:list

php cli/joomla.php extension:discover:install

and

php cli/joomla.php extension:discover

The following is an example:

php cli/joomla.php extension:discover:list

 ! [NOTE] Cannot find discovered extensions. Perhaps you need to run extension:discover first?                          

php74:/srv/www/joomla/j4dev# php cli/joomla.php extension:discover:install

 ! [NOTE] There are no discovered extensions for install. Perhaps you need to run extension:discover first?             

php74:/srv/www/joomla/j4dev# php cli/joomla.php extension:discover

 ! [NOTE] 4 extensions have been discovered successfully.                                                               

php74:/srv/www/joomla/j4dev# php cli/joomla.php extension:discover:list

Discovered extensions.
======================

 ------------------------ -------------- --------- ---------- -------- 
  Name                     Extension ID   Version   Type       Active  
 ------------------------ -------------- --------- ---------- -------- 
  en-GB                    306            4.0.0     language   No      
  en-GB                    307            4.0.0     language   No      
  en-GB                    308            4.0.0     language   No      
  plg_sampledata_testing   309            4.0.0     plugin     No      
 ------------------------ -------------- --------- ---------- -------- 

php74:/srv/www/joomla/j4dev# php cli/joomla.php extension:discover:install --eid 306

                                                                                                                        
 [OK] Extension with ID 306 installed successfully.                                                                     
                                                                                                                        

php74:/srv/www/joomla/j4dev# php cli/joomla.php extension:discover:install 

 ! [NOTE] 3 discovered extensions have been installed.     

Actual result BEFORE applying this Pull Request

See #31524

Documentation Changes Required

Yes: https://docs.joomla.org/J4.x:CLI_Update

[ceford]

I have tested this item ✅ successfully on be63829

Commands worked as described - discovered and then installed one extension.

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[ghost]

@PhilETaylor I committed all your suggestions. Please have look, if everything is fine.

[alikon]

please fix https://ci.joomla.org/joomla/joomla-cms/43524/1/8
😃

[alikon]

funny when we have a pr with unit/system code too 😄

[alikon]

that's another issue
let me be happy to see a pr with system tests ..... whatever

plus a cli pr 👍

[alikon]

I have tested this item ✅ successfully on 646a889

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[alikon]

@PhilETaylor can you please test this 1

[richard67]

@PhilETaylor Well there were commits after your test ... but I've just checked, it was just texts .. so I restore your result in the issue tracker.

[richard67]

RTC

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[richard67]

Just texts I meant.

[richard67]

yes it was just tests and the unit tests now pass - that is good enough for me :)

@PhilETaylor Was a typo, not "tests", "texts" I meant. But it's ok.