php-twig 3.x in circular build dependency situation with symfony 5

[Bryce Harrington]

php-symfony-string is a new package introduced in symfony 5, but not in symfony 4. This package is required by php-twig 3.x for running its testsuite during the build process. Unfortunately, symfony 5 itself depends on three new packages introduced in php-twig 3. Thus, there is a circular dependency between these packages during build.

Since php-twig only requires php-symfony-string for its testsuite, a possible way to sidestep the problem is to temporarily skip running php-twig's testsuite, allowing the php-symfony-string dependency to be temporarily dropped.

Then, once this bootstrapped php-twig is in -proposed, symfony should hopefully complete its build. At that point we should be able to revert the php-twig testsuite disablement and re-upload it to build with the testsuite, and carry on from there.

[Utkarsh Gupta (utkarsh)]

If only it were simple to build symfony once we landed php-twig, which I did, some moments ago. :)

Anyhow, symfony has a little bit of mess because of .so involved, which can be cleaned up easily but some tests behave oddly:
```
Error in bootstrap script: Error:
Failed opening required 'Cache/TagInterop/autoload.php' (include_path='.:/usr/share/php')
KO src/Symfony/Bundle/DebugBundle
PHP Warning: require_once(Cache/TagInterop/autoload.php): Failed to open stream: No such file or directory in /usr/share/php/Cache/IntegrationTests/autoload.php on line 4
```

This probably happens in Debian as well; me and William (~williamdes)are investigating that on Debian and will try to have that fixed. Anyhow, disabling tests for symfony as well for now. I've got closer to building this. Mostly everything can be reverted once we have settled down the cicular-dependency hell hole. :D

Thus, adding symfony to this bug as well. It further needs dependency bumps which I'll take care of on top of this.

[Utkarsh Gupta (utkarsh)]

Okay, we've cleared the way through so far, yay! \o/

Now, the interesting bit is that there are circular dependencies for testing as well. php-doctrine-bundle's tests rely on the working symfony & symfony's tests rely on working php-doctrine-bundle :)

But at the moment, php-doctrine-bundle needs a rebuild. Because otherwise, it tries to pull in parts of symfony/cache v4.

So I'd like to disable the tests & do a rebuild & upload. This will help enable symfony's tests and later on we work on enabling tests for php-doctrine-bundle.

[Launchpad Janitor (janitor)]

This bug was fixed in the package php-doctrine-bundle - 2.2.3-1ubuntu1

---------------
php-doctrine-bundle (2.2.3-1ubuntu1) impish; urgency=medium

  * Rebuild w/ PHP 8.0.
  * d/rules: Temporarily disable testsuite to allow sidestepping
    circular build dependency on php-twig (and its components).
    This change can be reverted once both php-twig and symfony
    have migrated. (LP: #1929880)

 -- Utkarsh Gupta <email address hidden> Fri, 04 Jun 2021 13:40:31 +0530