determine the vendor root dir based on the composer classloader

[mollux]

When the vendor folder is not in the %kernel.project_dir%, the elfinder:install command fails:

./bin/console elfinder:install

elFinder Installer
==================

 // Trying to install elfinder to public directory

 ! [NOTE] Starting to install elfinder to /var/www/html/docroot/public/bundles/fmelfinder folder


In Filesystem.php line 544:

  The origin directory specified "/var/www/html/docroot/vendor/studio-42/elfinder/css" was not found.

This is typically the case when the vendor folder is outside of the webroot dir, which is from security point of view a best practice.

This PR ensures the vendor folder location is determined based on the composer classloader.
This both works for application with the vendor inside and outside the webroot dir.

[helios-ag]

great, thank you!

[escopecz]

Is there any chance that this will be merged any time soon? It's complicating things on our side.

[helios-ag]

hi, sure

[helios-ag]

tagged as 12.3

[zdebol]

I have problem when vendor dir is example /var/www/some-name/vendor/some-hash-id and line $vendorRootDir = dirname($reflection->getFileName(), 3); return /var/www/some-name/vendor and concat with ELFINDER_CSS_DIR gives to /var/www/some-name/vendor/vendor/studio-42/elfinder/css and error in install. Change level in dirname to 4 return correct dir but this is not solution.