I'm debugging a Drupal 7 system I didn't setup, and I'm trying to understand how Drupal loads its modules.
This system appears to have modules nested within one other -- here's one example.
modules/custom/modulename/modulename.info
modules/custom/modulename/modulename.install
modules/custom/modulename/modulename.module
modules/custom/modulename/modulename_statistics/modulename_statistics.drush.inc
modules/custom/modulename/modulename_statistics/modulename_statistics.inc
modules/custom/modulename/modulename_statistics/modulename_statistics.info
modules/custom/modulename/modulename_statistics/modulename_statistics.module
It appears there's one module named modulename
, and inside this module there's another named modulename_staticstics
.
Is this a "legal/normal" setup? Does nesting one module within another confer any special features between the two modules? Where in the drupal source code are modules searched for/loaded? Is there any canonical piece of documentation that covers how module loading works? (my googling didn't turn up a lot)
(experienced software engineer here, but only passingly familiar with Drupal)