Eugene scaint

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".

tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname

Benchmark Bundler

Because loading gems can take longer than you think

Now available as a gem - get it here

Updated for Rails 4.0.0+

Bower

Set up the bower gem.
Follow the Bower instructions and list your dependencies in your bower.json, e.g.
```
// bower.json
```

{

#Heroku, Ruby on Rails and PhantomJS

In this post, I’m going to show you how to modify an existing Ruby on Rails app running on Heroku’s Cedar stack to use PhantomJS for screen scraping. If you’ve never heard of PhantomJS, it’s a command-line WebKit-based browser (that supports JavaScript, cookies, etc.).

Let’s get started. This is a high-level overview of the required steps:

Modify your app to use multiple Heroku buildpacks.
Extend your app to use both the Ruby as well as the PhantomJS buildpacks.
Confirm that everything worked.

	upstream app {
	server unix:/srv/app/current/tmp/sockets/unicorn.sock fail_timeout=0;
	}
	server {
	listen 80;
	server_name www.app.com;
	rewrite ^/(.*) http://app.com/$1 permanent;
	}

	server {

	require 'rubygems'
	require 'bundler'

	Bundler.require
	require './application'

	namespace :assets do
	desc 'compile assets'
	task :compile => [:compile_js, :compile_css] do
	end

	import (
	"crypto/md5"
	"encoding/hex"
	)

	func GetMD5Hash(text string) string {
	hasher := md5.New()
	hasher.Write([]byte(text))
	return hex.EncodeToString(hasher.Sum(nil))
	}

	module AlertConfirmer
	class << self
	def reject_confirm_from &block
	handle_js_modal 'confirm', false, &block
	end

	def accept_confirm_from &block
	handle_js_modal 'confirm', true, &block
	end

	<?php

	require 'vendor/autoload.php';

	$transport = Swift_SmtpTransport::newInstance('localhost', 25);
	$mailer = Swift_Mailer::newInstance($transport);

	// DKIM 用の Signer を作成する
	$privateKey = file_get_contents('./default.private');
	$domainName = 'example.com';