[generate:libraries] Command to auto-generate libraries for theme and modules

[itsdarrylnorris]

Problem / Motivation

In order to use css/js into Drupal is via the libraries (*libraries.yml). We need to be able to support generating libraries to our themes and modules.

Solution

• We need to be able to generate a new library with versions and multiples external files and internal files.
• We need to generate some of the css/js even thought they are empty.
• CSS new files generation should be structure somehow in the SMACSS standards, or at least ask question to the user leading into have a css structure instead of one big css.
• This should be modular enough that it can be use on modules and themes.

Here is an example of an external library in the libraries file.

core/core.libraries.yml

backbone:
  remote: https://github.com/jashkenas/backbone
  version: "1.2.3"
  license:
    name: MIT
    url: https://github.com/jashkenas/backbone/blob/1.2.3/LICENSE
    gpl-compatible: true
  js:
    assets/vendor/backbone/backbone-min.js: { weight: -19, minified: true }
  dependencies:
    - core/underscore

Here is an example of a library on a theme using local files.

light_skeleton.libraries.yml

skeleton:
  version: 2
  js:
    assets/js/light_skeleton.js: {}
  dependencies:
    - core/jquery
  css:
    theme:
      vendor/skeleton/css/skeleton.css: {}
      vendor/skeleton/css/style.css: {}
      assets/css/light_skeleton.css: {}

For more information about Drupal 8 Libraries (assets) - https://www.drupal.org/developing/api/8/assets