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A Capistrano Rails Guide

by Jonathan Rochkind, http://bibwild.wordpress.com

why cap?

Capistrano automates pushing out a new version of your application to a deployment location.

I've been writing and deploying Rails apps for a while, but I avoided using Capistrano until recently. I've got a pretty simple one-host deployment, and even though everyone said Capistrano was great, every time I tried to get started I just got snowed under not being able to figure out exactly what I wanted to do, and figured I wasn't having that much trouble doing it "manually".

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I'm a fan of MiniTest::Spec. It strikes a nice balance between the simplicity of TestUnit and the readable syntax of RSpec. When I first switched from RSpec to MiniTest::Spec, one thing I was worried I would miss was the ability to add matchers. (A note in terminology: "matchers" in MiniTest::Spec refer to something completely different than "matchers" in RSpec. I won't get into it, but from now on, let's use the proper term: "expectations").

Understanding MiniTest::Expectations

Let's take a look in the code (I'm specifically referring to the gem, not the standard library that's built into Ruby 1.9):

# minitest/spec.rb

module MiniTest::Expectations

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# Run this file with `RAILS_ENV=production rackup -p 3000 -s thin`
# Be sure to have rails and thin installed.
require "rubygems"

# We are not loading Active Record, nor the Assets Pipeline, etc.
# This could also be in your Gemfile.
gem "actionpack", "~> 3.2"
gem "railties",   "~> 3.2"

require "rails"

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@mixin animation (
  $name: false, 
  $duration: false, 
  $timing_function: false, 
  $delay: false, 
  $iteration_count: false, 
  $direction: false
) {
  @if $name            { -webkit-animation-name: $name;                        -moz-animation-name: $name;                          -ms-animation-name: $name; }
  @if $duration        { -webkit-animation-duration: $duration;                -moz-animation-duration: $duration;                  -ms-animation-duration: $duration; }

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task :env_checker do
  unless Rails.env.development?
    puts "Not in development environment, exiting!"
    exit 1
  end
end

namespace :app_name do
  desc 'Anonymize user, company, and location information'
    task :anonymize => [:environment, :env_checker] do

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/*
  * Normalized hide address bar for iOS & Android
  * (c) Scott Jehl, scottjehl.com
  * MIT License
*/
(function( win ){
	var doc = win.document;
	
	// If there's a hash, or addEventListener is undefined, stop here
	if( !location.hash && win.addEventListener ){

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module Archives
  module Callbacks
    def self.included(base)
      base.send :include, Archives::Callbacks::InstanceMethods
      base.before_create :do_something_awesome
    end

    module InstanceMethods
      private

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iPad

1024 × 690  In landscape on iOS 4.3
1024 × 672  In landscape on iOS 5
768  × 946  In portrait on iOS 4.3 
768  × 928  In portrait on iOS 5
             
1024 × 660  Always showing bookmarks bar in landscape on iOS 4.3
1024 × 644  Always showing bookmarks bar in landscape on iOS 5
768  × 916  Always showing bookmarks bar in portrait on iOS 4.3 

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Run from the root of the engine project:

rails generate cucumber:install --capybara

Edit features/support/env.rb and add to the top:

ENV["RAILS_ENV"] ||= "test"
require File.expand_path("../../../test/dummy/config/environment.rb",  __FILE__)
ENV["RAILS_ROOT"] ||= File.dirname(__FILE__) + "../../../test/dummy"

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# autoload concerns
module YourApp
  class Application < Rails::Application
    config.autoload_paths += %W(
      #{config.root}/app/controllers/concerns
      #{config.root}/app/models/concerns
    )
  end
end