metaskills / less-rails

less-rails doesn't work with the latest sprockets 3 beta. I have created a simple rails 4.2 app to demonstrate: https://github.com/waynehoover/semantic-less-sprockets-3

Simply run bundle then rails s and go to the root url to see the error. I stumbled upon this while trying to integrate less-rails-semantic_ui into my app with the latest sprockets 3 beta (Semantic-Org/Semantic-UI-Rails-LESS#2). Not sure if its sprockets related or less-rails related, but sass-rails seems to work fine with sprockets-3.

Here is backtrace. Seems like Tilt interface will be deprecated in Sprockets 3.x and removed in 4.x.

So, I think need to support new processor interface.

@maxd The backtrace isn't visible to me.

I just ran into this issue myself. Upgrading only sprockets to 3.0 breaks my app whenever I try to do an asset_path for a .less file.

I did a lot of searching before finding this issue, so for search engines: The issue I ran into was an error of "undefined method `[]' for nil:NilClass" when upgrading to sprockets 3.

Same problem here ... finding this after 3h....

Might be time to escalate this issue as sprockets 3 was just released a lot of people will be upgrading.

+1 been debugging this for awhile. Sprockets 2.x requires tilt but sprockets 3.x does not. Less-rails requires tilt here, yet is not required in the gemfile. It was by luck that less-rails worked previously.

I am using the following as a fix:

# Gemfile
source 'https://rubygems.org'
gem 'rails', '4.1.1'
gem 'less-rails', '2.6.0'
# Require tilt supported with sprockets 2.x which is what less-rails was using.
gem 'tilt', '1.4.1'

+1 I just created a new rails 4.2 app, less-rails doesn't work

<%= stylesheet_link_tag 'application', media: 'all' %>

Throws:

undefined method `[]' for nil:NilClass

@cha55son I tried this out and found that adding tilt to my Gemfile did not fix the problem. I still get the same issue.

To clarify my error was something like:

File not found -- tilt

and was being generated from

less-rails/lib/less/rails.rb

Line 8 in c9f2cb9

require 'tilt'

+1, ended up locking sprockets to an older version after searching for several hours for a fix.

Getting the same error as @sporto.

The same for me, still working with older version of Sprockets.

I have fix prepared in sprockets3 branch. Can you please confirm it works for you? I'm going to release new version ASAP.

I can confirm that this new branch fixes the issue for me.

New version is out (https://rubygems.org/gems/less-rails/versions/2.7.0). Yay!

👍 Excelent!

Indeed, well done!

Make less-rails work with sprockets 3