Ruby at GitHub - Speaker Deck

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 RUBY at frequently asked questions about Brandon Keepers • @bkeepers

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Hello, I am @bkeepers.

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Contrary to popular belief, I do not keep bees.

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

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Speaker Deck

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♡

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

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Frequently Asked Questions:  Which languages are used at GitHub?  Where is Ruby not used?  Why Ruby?  Which libraries do you use?  How do you handle updates?

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 Which languages are used at GitHub?

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 602 github.com/github  228 inactive  42 forks  7 ignored  342 * 602 - 228 - 42 - 7 = 325 some repos met multiple conditions

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Excluding: github.com/libgit2 github.com/boxen github.com/play github.com/[staﬀ]

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58% Ruby JavaScript 11% Objective-C 8% Shell 5% CoﬀeeScript 5% Other 6% C 4% C# 3% Internal GitHub Projects by primary language 342 repositories

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33% Ruby JavaScript 15% Objective-C 13% Puppet 3% CoﬀeeScript 7% Other 6% 15% C C# 6% Java 2% 342 repositories Internal GitHub Projects by total bytes

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– @rtomayko “GitHub isn’t a Rails shop, it’s not even a Ruby shop. It’s a Unix shop.”

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 Where is Ruby not used?

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   

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written in Objective-C

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written in C#

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written in Java

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 Numerous iOS apps written in Objective-C

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HUBOT written in CoﬀeeScript

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 unix utilities written mostly in C

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…but what about Phone Gap? SL4A? Py4A? py2app?

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In France, you can speak English, but it will be obvious that you are not French.

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…but what about Ruby Motion?

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The hardest part of learning iOS Development 3.53% Objective-C syntax iOS APIs 96.47%* *These precise numbers may not be accurate.

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 Why Ruby?

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 “no parents”

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Why do you drive a Toyota?

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taste

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practicality

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Ruby is not a

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Ruby is not a

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Ruby is not a

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Ruby is a

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Ruby is a

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 What libraries do you use?

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153  Gemﬁle

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Sinatra or Rails?

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Sinatra 51 projects Rails 30 projects 9 projects both

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8 MB both Rails 12.1 MB Sinatra 10.75MB

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test/unit, rspec or minitest?

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Internal GitHub Projects test frameworks 45% test/unit rspec 43% minitest 13%

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 How do you handle updates?

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 feature ﬂags

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module FeatureFlags def preview_features? staff? end def time_travel_enabled? preview_features? end end app/concerns/feature_ﬂags.rb

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class User < ActiveRecord::Base include FeatureFlags end app/models/user.rb module FeatureFlags def preview_features? staff? end def time_travel_enabled? preview_features? end end app/concerns/feature_ﬂags.rb class ApplicationController flags = FeatureFlags.public_instance_methods delegate *flags, :to => :current_user, :allow_nil => true helper_method *flags end app/controllers/application_controller.rb

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<%- if time_travel_enabled? -%> <%= link_to 'Time Travel', time_travel_path %> <%- end -%> app/views/home/index.html.erb

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<%- if time_travel_enabled? -%> <%= link_to 'Time Travel', time_travel_path %> <%- end -%> app/views/home/index.html.erb class TimeTravelController < ApplicationController before_filter :ensure_time_travel_enabled def ensure_time_travel_enabled not_found unless time_travel_enabled? end end app/controllers/time_travel_controller.rb

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module FeatureFlags def preview_features? staff? end def time_travel_enabled? preview_features? true end end app/concerns/feature_ﬂags.rb Launch Day

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 github.com/jnunemaker/ﬂipper  github.com/jamesgolick/rollout

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 Ruby 1.9 2.0

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The path to 1.9

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1. Run CI against 1.8 & 1.9 The path to 1.9

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1. Run CI against 1.8 & 1.9 2.? 3.Proﬁt The path to 1.9

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The path to 1.9 1. Run CI against 1.8 & 1.9 2.@tmm1 3.Proﬁt

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1. Run CI against 1.8, 1.9 & 2.0 2.@tmm1 3.Proﬁt The path to 2.0

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– @tmm1 “Compared to REE, average cpu response time for browser requests last week was reduced by over 25ms. The 99th percentile cpu response time for browser requests was reduced by over 125ms!”