Sprockets 4.2.0: Generates 404 on all assets

[james-em]

Hi,

All my gems are up to date. My frontend packages on the other hand very outdated, however it doesn't matter in the matter of this issue.

The CLI command

bundle exec rake ember:compile

builds by default assets into tmp/ember-cli/apps/frontend/assets and there is some magic that makes

GET http://localhost:3000/assets/vendor.css

possible.

However, starting with Sprockets 4.2.0, these GET http://localhost:3000/assets/vendor.css makes 404.

Just though I would share in case somebody else hits the same bug.

[factor4]

Hi! I solved this by not loading sprockets at all. In config/application.rb only load what you need and comment sprockets out:

require "rails"
# Pick the frameworks you want:
require "active_model/railtie"
require "active_job/railtie"
require "active_record/railtie"
require "active_storage/engine"
require "action_controller/railtie"
require "action_mailer/railtie"
# require "action_mailbox/engine"
# require "action_text/engine"
require "action_view/railtie"
# require "action_cable/engine"
# require "sprockets/railtie"
require "rails/test_unit/railtie"

You also have to comment out various config options which belongs to the assets pipeline under config/environments/* and config/initializers/assets.rb.

[xtagon]

Fixed in Sprockets 4.2.1