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Does one really need that Gem?
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a!/samphippen
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NO
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Let’s have some questions a!/samphippen
[email protected]
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you: ಠ_ಠ
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NO
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Bundler
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Bundler is one of the best package managers of all time
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Sincerely
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Let’s have some questions !!/samphippen
[email protected]
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Problem
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We specified one Gem in our Gemfile
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We got 6 gems installed
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Transitive dependencies
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You presumably trust the RSpec core team
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Let’s have some questions !!/samphippen
[email protected]
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Had you heard of diff-lcs before today?
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Do you trust its author?
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Even the most mature gems can have surprises in them
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(rails)
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What’s in a Gem?
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ActiveRecord
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activerecord.gemspec
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Gem::Specification.new do |s|
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s.platform = Gem::Platform::RUBY s.name = 'activerecord' s.version = version s.summary = ‘Object-relationa…’ s.description = 'Databases on Rails…’
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s.platform = Gem::Platform::RUBY s.name = 'activerecord' s.version = version s.summary = ‘Object-relationa…’ s.description = 'Databases on Rails…’
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version = File.read(File.expand_path('../../ RAILS_VERSION', __FILE__)).strip
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s.license = 'MIT'
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s.add_dependency( ‘activesupport', version) s.add_dependency( ‘activemodel’, version) s.add_dependency( ‘arel', ‘7.0.0.alpha')
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lib and bin directories
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A critical approach
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We’ve all done this
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We can do better
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The Ruby Toolbox is your friend
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State machine versus AASM
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Most gems are hideously understaffed
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Remember these people are working for free!
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Versioning
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SemVer is our standard
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M.m.p
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M.m.p We fixed one or more bugs
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M.m.p We added one or more features
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M.m.p We broke one or more APIs
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0.m.p We can break your shit at any moment
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No content
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Vendoring
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There is no shame in vending code
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Sometimes you do not need an entire gem
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< 100loc
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Let’s have some questions a!/samphippen
[email protected]