PHP Extension pcov is broken on Azure Pipeline

[sylfabre]

Description
The PR https://github.com/actions/virtual-environments/pull/3405/files#diff-95ffb9615f2b3417624ab00cf732ddb0ef86f44d8872bb35ab729001179abaffR83 makes it impossible to use pcov as it removes the content of the configuration file /etc/php/$version/mods-available/pcov.ini

This configuration file is to be copied to /etc/php/$version/[cli|apache2|fpm|...]/conf.d/ to enable the extension.
And the file from /etc/php/$version/[cli|apache2|fpm|...]/conf.d/ is to be removed to disable the extension.
Or use phpenmod and phpdismod (https://tecadmin.net/enable-disable-php-modules-ubuntu/) as php-common is available

=> Removing the content of /etc/php/$version/mods-available/pcov.ini is a very bad way to disable the extension...

Anyway, pcov can't be used at the same time that xdebug which is already installed by default.
So the right and simple solution is just not to install pcov, or install it but disabling it the right way.
And let experienced developers install/setup/use it if they need it.

Area for Triage:
PHP

Question, Bug, or Feature?:
Bug

Virtual environments affected

• Ubuntu 16.04
• Ubuntu 18.04
• Ubuntu 20.04
• macOS 10.15
• macOS 11
• Windows Server 2016 R2
• Windows Server 2019

Image version
20210524.1

Expected behavior
Possible to replace xdebug with pcov

Actual behavior
Impossible to enable/use pcov as its configuration file have been wiped out

Repro steps

phpenmod -v 7.4 pcov
php -m

=> pcov is not listed

[sylfabre]

Workaround is adding echo 'extension=pcov.so' | sudo tee /etc/php/$(PHP_VERSION)/cli/conf.d/20-pcov.ini to your pipeline

[dibir-magomedsaygitov]

Hello @sylfabre. Thank you for your report. We will take a look.

[al-cheb]

@sylfabre , Feel free to open the thread if you have any concerns.