rails5 rails:update config/environments/production.rb

- Update comments
- Rename serve_static_files to public_file_server.enabled preventing depreciation warnings
- Disable mailer caching in Rails 5
- Prevent assets.digest from being set in Rails 5
- Prepend log lines with request ID [1]

[1] rails/rails#22949

config/environments/production.rb

@@ -15,15 +15,13 @@
   config.consider_all_requests_local       = false
   config.action_controller.perform_caching = true
 
-  # Enable Rack::Cache to put a simple HTTP cache in front of your application
-  # Add `rack-cache` to your Gemfile before enabling this.
-  # For large-scale production use, consider using a caching reverse proxy like
-  # NGINX, varnish or squid.
-  # config.action_dispatch.rack_cache = true
-
   # Disable serving static files from the `/public` folder by default since
   # Apache or NGINX already handles this.
-  config.serve_static_files = ENV['RAILS_SERVE_STATIC_FILES'].present?
+  if !rails5?
+    config.serve_static_files = ENV['RAILS_SERVE_STATIC_FILES'].present?
+  else
+    config.public_file_server.enabled = ENV['RAILS_SERVE_STATIC_FILES'].present?
+  end
 
   # Compress JavaScripts and CSS.
   config.assets.js_compressor = :uglifier
@@ -32,33 +30,45 @@
   # Do not fallback to assets pipeline if a precompiled asset is missed.
   config.assets.compile = false
 
-  # Asset digests allow you to set far-future HTTP expiration dates on all assets,
-  # yet still be able to expire them through the digest params.
-  config.assets.digest = true
+  unless rails5?
+    # Asset digests allow you to set far-future HTTP expiration dates on all assets,
+    # yet still be able to expire them through the digest params.
+    config.assets.digest = true
+  end
 
   # `config.assets.precompile` and `config.assets.version` have moved to config/initializers/assets.rb
 
+  # Enable serving of images, stylesheets, and JavaScripts from an asset server.
+  # config.action_controller.asset_host = 'http://assets.example.com'
+
   # Specifies the header that your server uses for sending files.
   # config.action_dispatch.x_sendfile_header = 'X-Sendfile' # for Apache
   # config.action_dispatch.x_sendfile_header = 'X-Accel-Redirect' # for NGINX
 
+  # Mount Action Cable outside main process or domain
+  # config.action_cable.mount_path = nil
+  # config.action_cable.url = 'wss://example.com/cable'
+  # config.action_cable.allowed_request_origins = [ 'http://example.com', /http:\/\/example.*/ ]
+
   # Force all access to the app over SSL, use Strict-Transport-Security, and use secure cookies.
   # config.force_ssl = true
 
   # Set to :debug to see everything in the log.
   config.log_level = :info
 
   # Prepend all log lines with the following tags.
-  # config.log_tags = [ :subdomain, :uuid ]
+  config.log_tags = [ :request_id ]
 
   # Use a different logger for distributed setups.
   # config.logger = ActiveSupport::TaggedLogging.new(SyslogLogger.new)
 
   # Use a different cache store in production.
   # config.cache_store = :mem_cache_store
 
-  # Enable serving of images, stylesheets, and JavaScripts from an asset server.
-  # config.action_controller.asset_host = "http://assets.example.com"
+  # Use a real queuing backend for Active Job (and separate queues per environment)
+  # config.active_job.queue_adapter     = :resque
+  # config.active_job.queue_name_prefix = "alaveteli_#{Rails.env}"
+  config.action_mailer.perform_caching = false if rails5?
 
   # Ignore bad email addresses and do not raise email delivery errors.
   # Set this to true and configure the email server for immediate delivery to raise delivery errors.
@@ -77,6 +87,16 @@
   # Do not dump schema after migrations.
   config.active_record.dump_schema_after_migration = false
 
+  # Use a different logger for distributed setups.
+  # require 'syslog/logger'
+  # config.logger = ActiveSupport::TaggedLogging.new(Syslog::Logger.new 'app-name')
+
+  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.action_mailer.delivery_method = AlaveteliConfiguration.production_mailer_delivery_method.to_sym
 
   if AlaveteliConfiguration.production_mailer_delivery_method.to_sym == :smtp