Uploading static files to S3

Gemfile

# Aws and static site rendering
gem 'aws-sdk', '< 2.0'

publish.rake

require 'static'

namespace :publish do
  desc "Publish the static assets to the server"
  task :static do
    puts "Publishing"
    static_files = [
      "index.html",
      "css/share.css",
      "js/share.js",
      "fonts/pacifico/Pacifico-webfont.eot",
      "fonts/pacifico/Pacifico-webfont.svg",
      "fonts/pacifico/Pacifico-webfont.ttf",
      "fonts/pacifico/Pacifico-webfont.woff",
      "fonts/pacifico/stylesheet.css",
      "fonts/theano-didot/TheanoDidot-Regular-webfont.eot",
      "fonts/theano-didot/TheanoDidot-Regular-webfont.svg",
      "fonts/theano-didot/TheanoDidot-Regular-webfont.ttf",
      "fonts/theano-didot/TheanoDidot-Regular-webfont.woff",
      "fonts/theano-didot/stylesheet.css"
    ]
    static = Static.new
    static_files.each do |path|
      puts "  #{path}"
      ext = File.extname(path).sub('.', '')
      mime_type = Mime::Type.lookup_by_extension(ext)
      static.publish(Rails.root.join('public', path), path, mime_type)
    end
    puts "Done"
    puts ""
  end
end

static.rb

class Static
  attr_accessor :s3, :bucket

  def initialize
    self.s3 = AWS::S3.new(access_key_id: ENV['AWS_ACCESS_KEY_ID'], secret_access_key: ENV['AWS_SECRET_ACCESS_KEY'])
    self.bucket = self.s3.buckets[ENV['AWS_BUCKET']]
    self.bucket = self.s3.buckets.create(ENV['AWS_BUCKET']) unless bucket.exists?
  end

  def publish(source, path, content_type, expirable=true)
    # This line incurs remote communication with AWS
    obj = self.bucket.objects[path]
    return if obj.exists? && !expirable
    options = {
      acl: :public_read,
      content_type: content_type || 'text/html'
    }
    unless expirable
      options[:cache_control] = "max-age=#{1.year.to_i}"
      options[:expires] = 1.year.from_now.httpdate
    end
    obj.write(source, options)
  end
end