What is needed to precompile assets locally?

Asset pipeline: http://guides.rubyonrails.org/asset_pipeline.html#in-production

There are three caveats:

• You must not run the Capistrano deployment task that precompiles assets.
• You must ensure any necessary compressors or minifiers are available on your development system.
• You must change the following application configuration setting:

Capistrano:

http://capistranorb.com/documentation/advanced-features/overriding-capistrano-tasks/#

deploy.rb:

# clear the previous precompile task
Rake::Task["deploy:assets:precompile"].clear_actions

development.rb

# this prefix prevents serving compiled assets in development
config.assets.prefix = '/assets_dev'

.gitignore

public/assets-dev

Nginx:

location ~ ^/assets/ {
  expires 1y;
  add_header Cache-Control public;
 
  add_header ETag "";
  break;
}

Source: https://www.reinteractive.net/posts/116-12-tips-for-the-rails-asset-pipeline

To precompile locally, you need to do the following:

1. Setup a dummy production database on your local machine
2. Create a production entry in database.yml
3. Add in any other dummy settings to load a production environment
4. Run RAILS_ENV=production rake assets:clean assets:precompile
5. Wait
6. Wait some more
7. Commit the results in the public/assets folder
8. Deploy this