Remove Sprockets from Rails

Question

How do you remove Sprockets from Rails?

I've..

• removed all the Sprockets Gems.
• removed all the config.assets.* from initializers, etc..

Still, Rails is looking for Sprockets

/Users/username/.rvm/rubies/ruby-2.5.0/lib/ruby/gems/2.5.0/gems/sprockets-rails-3.2.1/lib/sprockets/railtie.rb:105:in block in <class:Railtie>': Expected to find a manifest file in `app/assets/config/manifest.js (Sprockets::Railtie::ManifestNeededError)

......

 Example:
13:58:38 web.1  |   //= link_tree ../images
13:58:38 web.1  |   //= link_directory ../javascripts .js
13:58:38 web.1  |   //= link_directory ../stylesheets .css

How do you actually remove Sprockets?

Answer 1

To completely remove sprockets from a Rails project:

Remove:

# Use SCSS for stylesheets
gem 'sass-rails', '>= 6'

from Gemfile then run bundle install.

Replace:

require 'rails/all'

with:

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"

in config/application.rb file.

Remove:

# Debug mode disables concatenation and preprocessing of assets.
# This option may cause significant delays in view rendering with a large
# number of complex assets.
config.assets.debug = true

# Suppress logger output for asset requests.
config.assets.quiet = true

from config/environments/development.rb file.

Remove:

# Compress CSS using a preprocessor.
# config.assets.css_compressor = :sass

# Do not fallback to assets pipeline if a precompiled asset is missed.
config.assets.compile = false

from config/environments/production.rb file.

Remove config/initializers/assets.rb file.

You can also remove app/assets folder but it is not necessary because you may need it later if you changed your mind.