Redis – When running rake assets:precompile RAILS_ENV=production over ES6 syntax pipeline got broken

RAILS ASSETS PIPELINE

When running rake assets:precompile RAILS_ENV=production over ES6 syntax, assets pipeline got broken. If we instead call rake assets:precompile with environment set to RAILS_ENV=development it perform fine.

Summarizing

`bundle install...
The Gemfile's dependencies are satisfied
yarn install...
yarn install v1.22.19
[1/4] Resolving packages...
success Already up-to-date.
Done in 0.41s.
yarn install v1.22.19
[1/4] Resolving packages...
success Already up-to-date.
Done in 0.33s.
yarn run v1.22.19
$ webpack --config ./config/webpack/webpack.config.js
asset application.js 66 KiB [compared for emit] [minimized] (name: application) 1 related asset
runtime modules 718 bytes 3 modules
orphan modules 26.4 KiB [orphan] 1 module
built modules 92.4 KiB [built]
  modules by path ./app/javascript/ 27 KiB
    ./app/javascript/application.js + 1 modules 26.7 KiB [built] [code generated]
    ./app/javascript/channels/index.js 212 bytes [built] [code generated]
    ./app/javascript/channels/ sync _channel.js$ 160 bytes [built] [code generated]
  modules by path ./node_modules/ 65.3 KiB
    ./node_modules/@rails/ujs/lib/assets/compiled/rails-ujs.js 27.7 KiB [built] [code generated]
    ./node_modules/turbolinks/dist/turbolinks.js 37.6 KiB [built] [code generated]
webpack 5.75.0 compiled successfully in 2534 ms
Done in 3.60s.
yarn install v1.22.19
[1/4] Resolving packages...
[2/4] Fetching packages...
[3/4] Linking dependencies...
[4/4] Building fresh packages...
Done in 18.62s.
rake aborted!
Uglifier::Error: Unexpected token: punc ((). To use ES6 syntax, harmony mode must be enabled with Uglifier.new(:harmony => true).
--
 584 
 585   App.cable = ActionCable.createConsumer();
 586 
 587 }).call(this);
 588 
 589 // app/javascript/channels/appearance_channel.js
 590 App.appearance = App.cable.subscriptions.create("AppearanceChannel", {
 591   // Called once when the subscription is created.
  =>   initialized() {
 593     this.update = this.update.bind(this)
 594   },
 595  
 596   // Called when the subscription is ready for use on the server.
 597   connected() {
 598     this.install()
 599     this.update()
 600   },
==
/usr/local/bundle/gems/uglifier-4.2.0/lib/uglifier.rb:291:in `parse_result'
/usr/local/bundle/gems/uglifier-4.2.0/lib/uglifier.rb:221:in `run_uglifyjs'
/usr/local/bundle/gems/uglifier-4.2.0/lib/uglifier.rb:166:in `compile'
/usr/local/bundle/gems/sprockets-3.7.2/lib/sprockets/uglifier_compressor.rb:53:in `call'
/usr/local/bundle/gems/sprockets-3.7.2/lib/sprockets/uglifier_compressor.rb:28:in `call'
/usr/local/bundle/gems/sprockets-3.7.2/lib/sprockets/processor_utils.rb:75:in `call_processor'
/usr/local/bundle/gems/sprockets-3.7.2/lib/sprockets/processor_utils.rb:57:in `block in call_processors'
/usr/local/bundle/gems/sprockets-3.7.2/lib/sprockets/processor_utils.rb:56:in `reverse_each'
/usr/local/bundle/gems/sprockets-3.7.2/lib/sprockets/processor_utils.rb:56:in `call_processors'
/usr/local/bundle/gems/sprockets-3.7.2/lib/sprockets/loader.rb:134:in `load_from_unloaded'
/usr/local/bundle/gems/sprockets-3.7.2/lib/sprockets/loader.rb:60:in `block in load'
/usr/local/bundle/gems/sprockets-3.7.2/lib/sprockets/loader.rb:317:in `fetch_asset_from_dependency_cache'
/usr/local/bundle/gems/sprockets-3.7.2/lib/sprockets/loader.rb:44:in `load'
/usr/local/bundle/gems/sprockets-3.7.2/lib/sprockets/cached_environment.rb:20:in `block in initialize'
/usr/local/bundle/gems/sprockets-3.7.2/lib/sprockets/cached_environment.rb:47:in `load'
/usr/local/bundle/gems/sprockets-3.7.2/lib/sprockets/base.rb:66:in `find_asset'
/usr/local/bundle/gems/sprockets-3.7.2/lib/sprockets/base.rb:73:in `find_all_linked_assets'
/usr/local/bundle/gems/sprockets-3.7.2/lib/sprockets/manifest.rb:134:in `block in find'
/usr/local/bundle/gems/sprockets-3.7.2/lib/sprockets/manifest.rb:133:in `each'
/usr/local/bundle/gems/sprockets-3.7.2/lib/sprockets/manifest.rb:133:in `find'
/usr/local/bundle/gems/sprockets-3.7.2/lib/sprockets/manifest.rb:186:in `compile'
/usr/local/bundle/gems/sprockets-rails-3.4.2/lib/sprockets/rails/task.rb:67:in `block (3 levels) in define'
/usr/local/bundle/gems/sprockets-3.7.2/lib/rake/sprocketstask.rb:147:in `with_logger'
/usr/local/bundle/gems/sprockets-rails-3.4.2/lib/sprockets/rails/task.rb:66:in `block (2 levels) in define'
/usr/local/bundle/gems/rake-13.0.6/exe/rake:27:in `<top (required)>'
/usr/local/bundle/gems/bundler-2.4.1/lib/bundler/cli/exec.rb:58:in `load'
/usr/local/bundle/gems/bundler-2.4.1/lib/bundler/cli/exec.rb:58:in `kernel_load'
/usr/local/bundle/gems/bundler-2.4.1/lib/bundler/cli/exec.rb:23:in `run'
/usr/local/bundle/gems/bundler-2.4.1/lib/bundler/cli.rb:491:in `exec'
/usr/local/bundle/gems/bundler-2.4.1/lib/bundler/vendor/thor/lib/thor/command.rb:27:in `run'
/usr/local/bundle/gems/bundler-2.4.1/lib/bundler/vendor/thor/lib/thor/invocation.rb:127:in `invoke_command'
/usr/local/bundle/gems/bundler-2.4.1/lib/bundler/vendor/thor/lib/thor.rb:392:in `dispatch'
/usr/local/bundle/gems/bundler-2.4.1/lib/bundler/cli.rb:34:in `dispatch'
/usr/local/bundle/gems/bundler-2.4.1/lib/bundler/vendor/thor/lib/thor/base.rb:485:in `start'
/usr/local/bundle/gems/bundler-2.4.1/lib/bundler/cli.rb:28:in `start'
/usr/local/bundle/gems/bundler-2.4.1/exe/bundle:45:in `block in <top (required)>'
/usr/local/bundle/gems/bundler-2.4.1/lib/bundler/friendly_errors.rb:117:in `with_friendly_errors'
/usr/local/bundle/gems/bundler-2.4.1/exe/bundle:33:in `<top (required)>'
/usr/local/bundle/bin/bundle:25:in `load'
/usr/local/bundle/bin/bundle:25:in `<main>'
Tasks: TOP => assets:precompile`

Gemfile

source 'https://rubygems.org'
git_source(:github) { |repo| "https://github.com/#{repo}.git" }

#uby '3.2.0'

ruby '~>3.0.5'

#---- alectrico < 2023
#
gem 'state_machines', :require => 'state_machines/core' #usado por el modelo User
gem 'state_machines-activerecord'  #usado por el modelo User
gem 'devise' #usado como autenticación
gem 'rack-cors', :require => 'rack/cors' #usado para combatir cross site attacks
gem 'dkim' #para que los correos emitidos no sean envíados a spam
gem 'delayed_job'
gem 'dragonfly'
gem 'logging-email'
gem 'logging-rails'
gem 'transbank-sdk', '~> 1.4'
gem 'paypal-sdk-rest'
gem 'wicked_pdf'
gem 'jwt'
gem 'dotenv' #usado por braintree como inicializador


  #--solo para precompilar assets, no usar en production
gem 'bootstrap-sass', '3.3.7'
gem 'jquery-rails'
gem 'coffee-rails', '~> 4.2'
gem "sprockets-rails"
gem 'uglifier' #se usa solo para generar assets precompilados
gem 'terser'
  #---
#-------- pedidos por los controllers
gem 'origami' #para hacer pdf
gem 'prawn' #para hacer pdf
gem 'httparty' #para enviar mensajes waba

group :test, :development do
  gem 'factory_bot_rails', '~> 4.0' #usado por rspec para los factories
  gem 'capybara' #usado por cucumber para las pruebas
  gem 'shoulda-matchers' #usado por rspec para pruebas
  gem 'faker'            #usado por rspec para construir factories a partir de modelos de datos
end

#depenencias de assets

# Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
gem 'rails', '~> 6.1.7'
# Use postgresql as the database for Active Record
gem 'pg', '>= 0.18', '< 2.0'
# Use Puma as the app server
gem 'puma', '~> 6.0'
# Use SCSS for stylesheets
gem 'sass-rails', '~> 6'
# Turbolinks makes navigating your web application faster. Read more: https://github.com/turbolinks/turbolinks
gem 'turbolinks', '~> 5'
# Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
gem 'jbuilder', '~> 2.11'
# Use Redis adapter to run Action Cable in production
# gem 'redis', '~> 4.0'
# Use Active Model has_secure_password
# gem 'bcrypt', '~> 3.1.7'

# Use Active Storage variant
# gem 'image_processing', '~> 1.2'

# Reduces boot times through caching; required in config/boot.rb
gem 'bootsnap', '>= 1.4.2', require: false

group :development, :test do
  gem 'bundle-audit'
  gem 'brakeman'
  # Call 'byebug' anywhere in the code to stop execution and get a debugger console
  gem 'byebug', platforms: [:mri, :mingw, :x64_mingw]
  gem 'pry-rails'
  gem 'rspec-rails', '~> 6.0.1'
  gem "rubocop", require: false
  gem "rubocop-rails", require: false
end

group :development,:production, :test do
  gem 'rack-mini-profiler', '~> 3.0'
end

# Windows does not include zoneinfo files, so bundle the tzinfo-data gem
gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]

# Ruby 3.1 no longer includes these
gem 'net-imap'
gem 'net-pop'
gem 'net-smtp'

gem 'jsbundling-rails'

production.rb

Rails.application.configure do

  config.exceptions_apps = self.routes
  config.action_view.embed_authenticity_token_in_remote_forms = true
  config.action_mailer.asset_host = config.domain["name_http"]
  config.action_mailer.default_url_options = { :host =>  config.domain['name_https'],:only_path => false}
  config.cache_classes = true
  config.eager_load = false
  config.consider_all_requests_local       = false
  config.action_controller.perform_caching = true
  config.assets.js_compressor = :uglifier
  config.assets.compile = false
  config.serve_static_assets = true
  config.force_ssl = true
  config.log_level =  ENV['CONFIG_LOG_LEVEL'].present? ? ENV['CONFIG_LOG_LEVEL'].downcase.to_sym : :fatal
  config.log_tags = [ :request_id ]
  config.action_mailer.perform_caching = true
  config.action_mailer.raise_delivery_errors = false
  config.i18n.fallbacks = true
  config.active_support.deprecation = :notify
  config.log_formatter = ::Logger::Formatter.new
  if ENV["RAILS_LOG_TO_STDOUT"].present?
    logger           = ActiveSupport::Logger.new(STDOUT)
    logger.formatter = config.log_formatter
    config.logger = ActiveSupport::TaggedLogging.new(logger)
  end
  config.active_record.dump_schema_after_migration = false
  config.log_to = %w[stdout]
  config.show_log_configuration = false
end
                                                                                                                                   

I was trying to precompile assets on local to serve on production.