Bed rails supplies a smooth
possessions:precompile job to prepare application possessions yet maintains all called for treasures for possessions generation as a basic component of the produced Gemfile. Allow’s see if we can stay clear of these reliances for runtime.
A brand-new Bed rails application features different treasures worrying possessions collection and also minification:
We could see various other treasures in older variations of Bed rails, like
It makes good sense because the Bed rails’s
possessions:precompile jobs is typically run within the
MANUFACTURING setting, where the CSS worries are specified:
$ feline config/environment/production.rb ... # Compress CSS utilizing a preprocessor. # config.possessions.css_compressor = :sass # Do not fallback to assets pipe if a precompiled property is missed out on. config.assets.compile = incorrect
# instance of older applications config.possessions.css_compressor = :sass config.possessions.js_compressor = :uglifier
Every one of this jobs yet consists of added treasures and also could have ramifications regarding system reliances. As an example, both
webpacker and also
possessions:precompile and also perhaps for beginning the Bed rails web server (Webpacker shouldn’t whine, yet
execjs would certainly).
Yet what happens if we wish to deal with possessions outside the Bed rails application’s release, hence eliminating these reliances? What happens if we’re mosting likely to develop an enhanced Docker container utilizing the multi-stage develop and also not offer Node.js in the last picture?
Well, we can do something we currently make with growth and also examination reliances – leave out these treasures for manufacturing. We can relocate them right into a brand-new possessions team in the Gemfile:
team :possessions do treasure 'sass-rails', '>= 6' treasure 'webpacker', '~> 5.0' # Or treasure 'uglifier' ... end
After that we can depend on Bundler setup to establish the best teams for the job handy:
$ export RAILS_ENV=manufacturing $ package config collection --neighborhood without growth:examination $ rails possessions:precompile $ package config collection --neighborhood without growth:examination:possessions $ rails s
without alternative won’t pack these possessions treasures yet will certainly stop working whenever you attempt to utilize them in the setup straight. This shouldn’t be a concern for an all new Bed rails 6.1 application with Webpacker, yet if your
js_compressor is readied to
:uglifier, after that leaving out the treasure winds up not beginning the Bed rails web server:
That occurs due to the fact that
uglifier counts on
Gem.loaded_specs, we can examine if we are filling a particular treasure and also not establish these setup choices:
... if Treasure.loaded_specs.has_key?('uglifier') config.possessions.js_compressor = :uglifier end ...
uglifier is utilized just if we are filling it – and also we just pack it while running
With the possessions team and also perhaps upgrading the
production.rb setup, we can leave out particular treasures while running the Bed rails application web server and also neglect Node.js from the manufacturing web server or a last container picture.
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