Integrate scripts/stylesheets from info/layout files with libraries

Closely related, possibly duplicate of: #1805452: [meta] Asset library declarations, registry, usage, DX, compatibility, documentation

Or this one? #1861676: Remove stylesheets[] and scripts[] .info file property support for modules.

#1996238: Replace hook_library_info() by *.libraries.yml file Should make it easier for ppl to declare their assets.

remove scripts[] from info files and replace it with library[]. Whether it's a bug or a feature, hook_library_info() can be called from template.php just fine.

stylesheets[] can be kept as is, it's totally fair to add a single css file without dependencies. It's highly unlikely for scripts, they will need to depend on jquery, drupal.js 99% of the time.

ok that patch doesn't work but it's supposed to add the install-page library on all seven pages. But it doesn't work.

Bump, now that we're focusing so much on libraries and their dependencies, I think this is pretty important

Patch works now.

( edit ) and it removes the scripts key from the info file.

No idea about the color fail.

So the color module only looks into the css files added with stylesheet, not the ones that are in a library.

Probably needs fixing but it's out of scope here.

Added an issue to color module #2228745: Color module doesn't look for CSS files declared in a library.

Change record draft here: https://drupal.org/node/2228783

I tested this patch and it works really nice...

I created custom theme, in THEMENAME.info.yml I added

libraries:
  - juliette/juliettelib

created THEMENAME.libraries.yml file and added few important lines into it

juliettelib:
  version: 1.x
  js:
    js/test.js: {}
  css:
    theme:
      css/style2.css: {}
  dependencies:
    - core/jquery
    - core/drupal

(See attached images...)

Hmmm, the blocks on the left have a block border now, reverting this patch makes it ok again - unless this is the intention of this patch of course ..

Before #11 patch:

<style media="all">
@import url("http://drupal8/core/themes/bartik/css/layout.css?n39hoa");
@import url("http://drupal8/core/themes/bartik/css/style.css?n39hoa");
@import url("http://drupal8/core/themes/bartik/css/colors.css?n39hoa");
</style>

After #11 patch:

<style media="all">
@import url("http://drupal8/core/themes/bartik/css/colors.css?n39hoa");
</style>
<style media="all">
@import url("http://drupal8/core/themes/bartik/css/layout.css?n39hoa");
@import url("http://drupal8/core/themes/bartik/css/style.css?n39hoa");
</style>

One can question the need for the library in bartik but it's important enough to have on example in core. so for now just adding the libraries key and not using it until color module is fixed in related issue.

Border removed/fixed and patch still works fine with its functionality. Thanks @nod_!