deploy.rake

require 'aws-sdk'
require 'net/http'
require 'uri'

namespace :deploy do
  desc 'Deploy to OpsWorks'
  task :opsworks do
    unless ENV['VERSION']
      puts 'Please provide a version'
      exit(1)
    end

    opsworks = AWS::OpsWorks.new.client
    s3 = AWS::S3.new

    stacks = opsworks.describe_stacks[:stacks]
    stack = stacks.select { |s| s[:name] == 'Stack' }[0]

    apps = opsworks.describe_apps(stack_id: stack[:stack_id])[:apps]
    app = apps.select { |a| a[:name] == 'App' }[0]

    bucket = s3.buckets['deployment-artifacts']
    obj = bucket.objects["#{ENV['VERSION']}.tar.gz"]

    opsworks.update_app(app_id: app[:app_id], app_source: { url: obj.url_for(:read).to_s.split('?')[0] })

    instances = opsworks.describe_instances(stack_id: stack[:stack_id])[:instances]

    created_deployment = opsworks.create_deployment(stack_id: stack[:stack_id], app_id: app[:app_id], instance_ids: instances.map { |i| i[:instance_id] }, command: { name: 'deploy' }, comment: "Release: #{ENV['VERSION']}")

    deployment = nil
    begin
      sleep 10 if deployment
      deployments = opsworks.describe_deployments(deployment_ids: [created_deployment[:deployment_id]])[:deployments]
      deployment = deployments.select { |d| d[:deployment_id] == created_deployment[:deployment_id] }[0]
    end while deployment[:status] == 'running'

    if deployment[:status] == 'successful'
      puts 'Successfully deployed to OpsWorks'
      exit(0)
    else
      puts "Deployment went wrong: #{deployment.inspect}"
      commands = opsworks.describe_commands(deployment_id: created_deployment[:deployment_id])[:commands]
      commands.select { |c| c[:status] == 'failed' }.each do |command|
        response = Net::HTTP.get_response(URI.parse(command[:log_url]))
        puts "Failed command: #{command.inspect}\nLog:\n#{response.body}"
      end
      exit(1)
    end
  end
end