deploy to aws s3 with Rake tasks

Rakefile

require 'aws-sdk'
require 'pathname'
require 'yaml'

CONFIG = {
  "distPath"        => "public/dist",
  "stylesheetsPath" => "public/dist/stylesheets",
  "javascriptsPath" => "public/dist/javascripts",
  "fontsPath"       => "public/dist/fonts"
}

def log(params, what)
  puts "\033[33;32m [Site LKD #{params[:version]}] step:\033[0m #{what}"
end

namespace :deploy do
  desc "Deploys a new version"
  task :run, [:env, :version] do |_t, params|
    Rake::Task["deploy:precompile"].invoke(params[:env], params[:version])
    Rake::Task["deploy:s3_upload"].invoke(params[:version])
  end

  desc "Upload new files to S3"
  task :s3_upload, :version do |_t, params|
    @version = params[:version]
    log params, "Uploading files to S3..."

    setup_s3

    upload_css
    upload_js
    upload_images
    upload_fonts

    log params, "Upload done."
  end

  desc 'Precompile'
  task :precompile, [:env, :version] do |_t, params|
    log params, 'Building project...'
    sh "gulp build --env #{params['env']} --releaseFolder #{params['version']}"
    log params, 'Project builded.'
  end

  # http://docs.aws.amazon.com/sdkforruby/api/Aws/S3/Object.html
  def setup_s3
    secrets = YAML.load_file("s3.secrets.yml")
    @s3 = Aws::S3::Resource.new(
      region: secrets["region"],
      access_key_id: secrets["access_key_id"],
      secret_access_key: secrets["secret_access_key"]
    )
    @bucket = @s3.bucket(secrets["bucket"])
  end

  def upload_css
    upload_dir("#{CONFIG["stylesheetsPath"]}/*.css", { prefix: "stylesheets", gzip: true })
  end

  def upload_js
    upload_dir("#{CONFIG["javascriptsPath"]}/*.js", { prefix: "javascripts", gzip: true })
  end

  def upload_images
    upload_dir("#{CONFIG["distPath"]}/**/*.{jpg,png,jpeg,gif,svg,ico}")
  end

  def upload_fonts
    upload_dir("#{CONFIG["fontsPath"]}/**/*.*", { prefix: "fonts" })
  end

  def upload_dir(dir, params = {})
    Dir[dir].each do |file|
      upload_file(file, params)
    end
  end

  def upload_file(file, params = {})
    name = Pathname.new(file)
    aws_options = { acl: "public-read" }

    if params[:gzip]
      aws_options[:content_encoding] = "gzip"
    end

    ext = ['.jpg', '.png', '.jpeg', '.gif', '.svg', '.ico']
    if ext.include?(name.extname)
      name = name.sub('public/dist/', '')
    else
      name = name.basename
    end

    upload_to = ["dist", @version, params[:prefix], name]

    @bucket.object(upload_to.compact.join("/")).upload_file(file, aws_options)
    puts "\e[93m -> #{file}\e[0m \e[96m-> #{upload_to.compact.join("/")}\e[0m"
  end
end