Module Builder announces split, due to functionality differences

For Drupal 8, Module Builder is undergoing some big changes. It still builds hooks, a README file, an api.php file, permissions, an admin settings form, but now also builds plugins, services, routing items, and its ability to scan your codebase to learn about hooks invented by any of your modules is now extended to plugin types too. And it's actually been available for Drupal 8 for quite some time, but up till now only as the Drush plugin version.

I've now released the D8 version of the module, so you can use an admin UI in Drupal which lets you select the components you want in a form. Unlike Drupal 7 though, the options you enter for your module to generate are stored in a config entity, so you can generate code and then go back and tweak the settings and generate it again, as often as you like.

The big change isn't any of these though. The big change is that Module Builder is being split up.

For a very long time, the Module Builder codebase has been three things in one. Back when I added Drush support (in 2009, according to the git log), it made sense to gradually refactor the code into three parts: the Drupal module UI, the Drush commands, and the common code that does the actual work of generating code based on some parameters (such as which hooks you want, the module name, etc).

That core code has undergone a lot of changes. It's gone from just working with hooks, to a framework that's extensible with new component types. So for example, it's possible to request simply 'an admin form', and the generating code knows to produce the code for the form, the admin permission, and the router item. So that's one component that in fact produces form functions, hook_permission(), hook_menu() on Drupal 7, form class, permissions.yml, routing.yml on Drupal 8. Because Module Builder also works on multiple versions of Drupal (the code to produce Drupal 5 code is even still in there, if you have cause to try it, let me know if it still works!).

Having this multiple-version code within a Drupal module that's only for single version is a source of problems and confusion. The 7.x-2.x version of the project contains a module that's only for Drupal 7, but also the core code and the Drush plugin that both work on all versions. It also increases maintenance work, if we want to the older versions to keep receiving improvements to the generating code.

Hence the split. Module Builder is being divided into three parts:

  • The core code of Module Builder has been moved to a separate library, which is called Drupal Code Builder to distinguish it.
  • The Module Builder project is from now on just Drupal module, which requires the Drupal Code Builder library.
  • The Drush plugin will be moving too, and will also require the Drupal Code Builder library.

So to summarize, the situation is now as follows:

  • To build modules in a Drupal UI, on Drupal 8, you need:
  • To build modules with Drush, on any version, you need:
    • Module Builder 7.x-2.x, installed as a Drush command plugin (again, see the README). But note this will shortly be changing when the Drush command moves out of the project too.
  • To build modules in a Drupal UI, on Drupal 7, you need:
    • Module Builder 7.x-2.x. I will probably release a 7.x-3.x at some point which requires the Drupal Code Builder library, so that the Drupal 7.x UI gets new features that are released in the library.

I'll be writing a post soon about how Drupal Code Builder works, so if you're interested in making Drupal Code Builder make something new, look out for that.