BOA backport Drupal 9 support

Tags are good too. ;)

Hi,

I'm testing this in aegir 3.19.0 prior to release from the debian package in the testing archive.

Debian Buster w/ PHP 7.3.19-1~deb10u1, MariaDB 10.3.25-0+deb10u1

I added an unmanaged platform using the drupal 9.0.9 release from the tarball. The platform was added and verified successfully.

When I try to add a site, the following error is produced:

Unable to load class Drush\Sql\Sql	   error
Drush\Sql\SqlException: Unable to find a matching SQL Class. Drush cannot find your database connection details. in phar:///usr/local/bin/drush/commands/sql/sql.drush.inc:545 Stack trace: #0 /usr/share/drush/commands/provision/platform/drupal/install_9.inc(102): drush_sql_get_class() #1 /usr/share/drush/commands/provision/platform/drupal/install_9.inc(176): install_main() #2 phar:///usr/local/bin/drush/includes/drush.inc(78): include_once('/usr/share/drus...') #3 phar:///usr/local/bin/drush/includes/engines.inc(520): drush_include('/usr/share/drus...', 'install') #4 /usr/share/drush/commands/provision/platform/provision_drupal.drush.inc(97): drush_include_engine('drupal', 'install') #5 phar:///usr/local/bin/drush/includes/command.inc(422): drush_provision_drupal_provision_install_backend() #6 phar:///usr/local/bin/drush/includes/command.inc(231): _drush_invoke_hooks(Array, Array) #7 phar:///usr/local/bin/drush/includes/command.inc(199): drush_command() #8 phar:///usr/local/bin/drush/lib/Drush/Boot/BaseBoot.php(67): drush_dispatch(Array) #9 phar:///usr/local/bin/drush/includes/preflight.inc(66): Drush\Boot\BaseBoot->bootstrap_and_dispatch() #10 phar:///usr/local/bin/drush/includes/startup.inc(462): drush_main() #11 phar:///usr/local/bin/drush/includes/startup.inc(369): drush_run_main(false, '/', 'Phar detected. ...') #12 phar:///usr/local/bin/drush/drush(114): drush_startup(Array) #13 /usr/local/bin/drush(10): require('phar:///usr/loc...') #14 {main}   v error

The drush at /usr/local/bin/drush is 8.1.16. My understanding is this fine for aegir, but only drush 10 is compatible with Drupal 9. Are there supplemental steps to get drush 10 configured for use with the drupal sites created by aegir?

I missed the part with drush 8 HEAD in your previous comment

Trying with drush 8.4.5 since it was released after your comment

Works well with drush 8.4.5. Thanks for all your work!

https://www.drupal.org/commitlog/commit/4646/10badd30a60231699e5f31de533...
in the above, does this change mean that my admin must be named "admin"?

- $username = $account->getUsername();
+ $username = "admin";

The Drush issue (at least for Debian) is #3185979: Debian package has old version of Drush.

I believe there's nothing left to do here, but please reopen if I'm missing something.

Some folks may be interested in #3145927: [META] Support Ubuntu 20.04 LTS though, which is related.