By webchick on
Change record status: 
Published (View all published change records)
Project: 
Drupal core
Introduced in branch: 
8.x
Issue links: 
https://www.drupal.org/node/1299424
Description: 

As of Drupal 8, each directory can only contain a maximum of one module, in order to better support PSR-4 and the configuration system.

While in Drupal 7, it was acceptable to have a module directory structure like:

sites/all/modules/views/views.module
..
sites/all/modules/views/views_ui.module

In Drupal 8, it should be:

sites/all/modules/views/views.module
...
sites/all/modules/views/views_ui/views_ui.module

Note that custom and contrib projects may also be placed in new top-level 'modules', 'themes', and 'profiles' directories. See the change record at http://drupal.org/node/1766160 for more information.

Impacts: 
Module developers
Updates Done (doc team, etc.)
Online documentation: 
Not done
Theming guide: 
Not done
Module developer documentation: 
Not done
Examples project: 
Not done
Coder Review: 
Not done
Coder Upgrade: 
Not done
Other: 
Other updates done