Vagrant AWS config for Haskell projects

Vagrantfile

# -*- mode: ruby -*-
# vi: set ft=ruby :

# install:
#   `vagrant plugin install vagrant-aws`
#   `vagrant box add dummy https://github.com/mitchellh/vagrant-aws/raw/master/dummy.box`
# config:
#   `export AWS_ACCESS_KEY_ID='...'`
#   `export AWS_SECRET_ACCESS_KEY='...'`
#   `export AWS_REGION='us-west-2'`
# launch:
#   `vagrant up --provider=aws`
# reprovision (rsyncs project dir too):
#   `vagrant provision`
# destroy:
#   `vagrant destroy`

Vagrant.configure('2') do |config|
  config.vm.provider :aws do |aws, override|
    aws.access_key_id = ACCESS
    aws.secret_access_key = SECRET
    aws.region = REGION
    aws.instance_type = INSTANCE
    aws.security_groups = GROUPS
    aws.keypair_name = KEYPAIR
    aws.user_data = USERDATA
    aws.region_config 'ap-northeast-1', ami: 'ami-a929c5a9' # http://cloud-images.ubuntu.com
    aws.region_config 'ap-southeast-1', ami: 'ami-5cf6c10e'
    aws.region_config 'ap-southeast-2', ami: 'ami-fd3342c7'
    aws.region_config 'cn-north-1',     ami: 'ami-2204961b'
    aws.region_config 'eu-central-1',   ami: 'ami-16e8da0b'
    aws.region_config 'eu-west-1',      ami: 'ami-93c756e4'
    aws.region_config 'sa-east-1',      ami: 'ami-9dc87180'
    aws.region_config 'us-east-1',      ami: 'ami-12fea27a'
    aws.region_config 'us-gov-west-1',  ami: 'ami-b3422390'
    aws.region_config 'us-west-1',      ami: 'ami-27ac4863'
    aws.region_config 'us-west-2',      ami: 'ami-a7785897'
    override.ssh.private_key_path = "~/.ssh/#{KEYPAIR}-#{REGION}.pem"
    override.ssh.username = 'ubuntu'
    override.vm.box = 'dummy'
    override.vm.synced_folder(
      '.',
      "/home/ubuntu/src/#{File.basename(File.expand_path('..', __FILE__))}/",
      type: 'rsync',
      owner: 'ubuntu',
      create: true,
      rsync__exclude: [ '.git/', 'dist/', '.cabal-sandbox/' ]
    )
  end
end

ACCESS = ENV['AWS_ACCESS_KEY_ID'] ||
         begin
           throw 'REQUIRED: AWS_ACCESS_KEY_ID ENV VARIABLE'
         end

SECRET = ENV['AWS_SECRET_ACCESS_KEY'] ||
         begin
           throw 'REQUIRED: AWS_SECRET_ACCESS_KEY ENV VARIABLE'
         end

REGION = ENV['AWS_REGION'] || 'us-east-1'

KEYPAIR = ENV['AWS_KEYPAIR'] || 'default'

INSTANCE = ENV['AWS_INSTANCE'] || 'm3.medium'

GROUPS = begin
           require 'CSV'
           (ENV['AWS_GROUPS'] || 'default').strip.parse_csv
         end

USERDATA = <<EOF
#!/bin/bash
apt-get update
apt-get upgrade -y
apt-get install -y python-software-properties
add-apt-repository -y ppa:hvr/ghc
apt-get update
apt-get install -y ghc-7.8.4 cabal-install-1.20 \
  build-essential libffi-dev zlib1g-dev git tig tmux htop itop
apt-get install -y emacs24-nox || apt-get install -y emacs23-nox
echo 'PATH=/opt/ghc/7.8.4/bin:$PATH' | tee /etc/profile.d/ghc.sh
echo 'PATH=/opt/cabal/1.20/bin:$PATH' | tee /etc/profile.d/cabal.sh
EOF