CAPISTRANO fo non-Rubyist 

who we are Dimitris Tsironis Dr. John Pagonis Dr. John Pa onis is onto somethin with Missum these days. You can follow him at @JohnPa onis and @MissumApp Founder at Geembo, UI desi ner & hu e eek, who loves ood desi n and french fries, as much as ood indentation in a stylesheet. Follow him @tsironakos and @ eemboHQ 

WHAT’S THE PROBLEM? deploys can be a real mess mistakes could happen very easily you don’t mess with the production you’re actually delayin bu fixes, new features etc. 

one-click deploys! (well, almost) 

is a lan ua e agnostic tool for remote application administration tasks heavily used by Rails community it’s for sysadmins and devops uys it fits well with deployin web-apps provisionin of infrastructure better handled with other tools, e . Chef, Puppet, Babushka 

how it works unde the bo et 

philosophy it runs on your computer connects to the server over ssh there is no Capistrano server or sth like that automates the tasks you would manually do with command-line 

philosophy part ii uses a Ruby-based DSL for task automation there are already ready-to-use tasks cap shell offers an interactive prompt for adhoc commands cap shell sessions are cached and can be reused 

built-in tasks It ships with plenty of stuff, by default 

ready-to-use recipes You can find plenty on Github https://github.com/nesquena/cap-recipes Ruby setup & RubyGems mana ement Apache & Phusion Passen er Aptitude mana ement Mon oDB and much more! 

custom tasks Tailor-made Capistrano tasks are easy. It’s all Ruby and Rake-like tasks, after all. 

how to set it up prepare fo the ba le 

set it up you need a Capfile in the root of the project then, you can execute capistrano tasks anywhere in your project’s folder, by runnin : cap 

rails-less deploy example 

capify Capify is a file enerator for your project usually used with Rails project but it works with other projects in eneral, it can be enhanced to work with other structures 

capify One command to enerate the files Files you need Capfile - basic Capistrano file in root of the project config/deploy.rb - here’s where you write custom tasks 

production or staging confi /deploy/production.rb confi /deploy/sta in .rb 

roles allow you to write capistrano tasks that only apply to certain servers then you can do somethin like this 

configuration example confi /deploy.rb 

custom tasks example confi /deploy.rb 

RAILS-specific magic task fo Ruby on Rail only 

asset precompile PROBLEM Asset precompile can be slow. It could take several minutes that we could use to make a coffee or watch some cats ifs 

asset precompile solution Skip precompile, if it isn’t necessary “The ability to destroy a planet is insignificant next to the power of Git” --a tech-savvy Darth Vader 

rails-specific magic confi /deploy.rb Source: StackOverflow of course! 

RESOURCES Deployin with Capistrano - Github Help https://help. ithub.com/articles/deployin -with-capistrano Capistrano Wiki https:// ithub.com/capistrano/capistrano/wiki Capistrano Multista e extension https:// ithub.com/capistrano/capistrano/wiki/2.x-Multista e-Extension Capistrano Handbook - still immature https:// ithub.com/leehambley/capistrano-handbook/blob/master/ index.markdown Capistrano Goo le Group http:// roups. oo le.com/ roup/capistrano 

thank you! @JohnPa onis @tsironakos @ eemboHQ