Limitless - RubyUnconf Hamburg 2019

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Limitless RubyUnconf Hamburg 2019

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Terence Lee @hone02

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Austin, TX

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Sorry, this is a different kind of talk.

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Dark Days of Dependency Management in Rails 2.3 # config/environment.rb Rails::Initializer.run do |config| # depend on latest version of paperclip config.gem "paperclip" config.gem "rspec", :version => "1.2.4" config.gem "cucumber", :version => "0.9.8" end

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Install Gems into System $ rake gems:install

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Just Gem Install $ gem install cucumber

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Just Gem Install $ gem install cucumber --version 0.9.8

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Unpack gems into vendor/ $ rake gems:unpack

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Unpack a specific gem $ rake gems:unpack GEM=cucumber

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This took a whole day

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Gem Activation Errors

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Dep Management on the Heroku Bamboo Stack # .gems hpricot --version '>= 0.2' --source code.whytheluckystiff.net dm-core --version 0.9.10

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Dep Management on the Heroku Bamboo Stack -----> Installing gem hpricot >= 0.2 from http://code.whytheluckystiff.net Building native extensions. This could take a while... Successfully installed hpricot-0.6 1 gem installed -----> Installing gem dm-core 0.9.10 from http://gems.rubyforge.org Successfully installed addressable-2.0.2 Successfully installed extlib-0.9.10 Successfully installed data_objects-0.9.11 Successfully installed dm-core-0.9.10 4 gems installed

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rails 2.3.6 May 23, 2010

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actionpack, rack 1.0.1 -> rack 1.1.0

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Gem Activation Error Missing the Rails gem. Please `gem install -v= 2.3.5`, update your RAILS_GEM_VERSION setting in config/environment.rb for the Rails version you do have installed, or comment out RAILS_GEM_VERSION to use the latest version installed.

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Issues with runtime Gem Resolution gem "activemerchant", "1.4.2" # results in activating activemerchant, as well as # activesupport 3.0.pre, since it is >= 2.3.2 gem "rails", "2.3.4" # results in: # can't activate activesupport (= 2.3.4, runtime) # for ["rails-2.3.4"], already activated # activesupport-3.0.pre for ["activemerchant-1.4.2"]

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merb All you need… nil you don’t

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merb 2 == rails 3

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Bundler 0.8: Gemfile

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Bundler 0.9: Gemfile.lock

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Terrible DX $ bundle lock

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Terrible DX $ bundle lock $ bundle install

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Terrible DX $ bundle lock $ bundle install $ bundle unlock

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Bundler 1.0.0 August 29, 2010

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Terrible DX $ bundle lock $ bundle install $ bundle unlock

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Terrible DX $ bundle lock $ bundle install $ bundle unlock

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Rocky Road

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Why do we need a lockfile? After developing your application for a while, check in the application together with the Gemfile and Gemfile.lock snapshot. Now, your repository has a record of the exact versions of all of the gems that you used the last time you know for sure that the application worked... This is important: the Gemfile.lock makes your application a single package of both your own code and the third-party code it ran the last time you know for sure that everything worked. Specifying exact versions of the third-party code you depend on in your Gemfile would not provide the same guarantee, because gems usually declare a range of versions for their dependencies.

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Alternatives ● isolate ● rvm gemsets

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bundle exec

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bundler is slow

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Bundler 1.17 merged into Ruby 2.6

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That's my story...

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and it's your story

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What did we learn?

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Heroes

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Heroes Leaders

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Lockfiles

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Can't Predict the Outcome ● Elixir -> mix.lock ● Rust -> cargo.lock ● Node.js -> package-lock.json, yarn.lock ● PHP -> composure.lock ● Go -> go.sum, Gopkg.lock ● Python -> poetry.lock, Pipfile.lock

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So many more stories like these ● Bundler ● SASS ● Rails ● 12factor ● Testing + BDD ● Static Site Generators (Jekyll) ● Code Covenant ● RailsBridge ● RailsGirls ● CodeSchools/Bootcamps ● DevOps: Chef, Puppet, $ git push heroku master