use vagrant and chef-apply to provision a dev box.

Vagrantfile

@@ -0,0 +1,11 @@
+# -*- mode: ruby -*-
+# vi: set ft=ruby :
+
+Vagrant.configure(2) do |config|
+  config.vm.box = "bento/ubuntu-14.04"
+  config.vm.provision :chef_apply do |chef|
+    chef.version = "latest"
+    chef.install = "force"
+    chef.recipe = IO.read("provision.rb")
+  end
+end

provision.rb

@@ -0,0 +1,86 @@
+execute "apt-get update -y"
+execute "apt-get upgrade -y"
+
+package [
+  "build-essential",
+  "curl",
+  "git-core",
+  "libcurl4-openssl-dev",
+  "libffi-dev",
+  "libreadline-dev",
+  "libsqlite3-dev",
+  "libssl-dev",
+  "libxml2-dev",
+  "libxslt1-dev",
+  "libyaml-dev",
+  "python-software-properties",
+  "sqlite3",
+  "zlib1g-dev",
+]
+
+bash "install postgres" do
+  user "root"
+  not_if { ::File.exist?("/etc/apt/sources.list.d/pgdg.list") }
+  code <<-SCRIPT
+    echo "deb http://apt.postgresql.org/pub/repos/apt/ $(lsb_release -cs)-pgdg main" > /etc/apt/sources.list.d/pgdg.list
+    wget --quiet -O - https://www.postgresql.org/media/keys/ACCC4CF8.asc \
+      | apt-key add -
+    apt-get update -y
+    apt-get install -y postgresql-9.4 libpq-dev \
+      postgresql-contrib-9.4 postgresql-client-common
+  SCRIPT
+end
+
+sql = "SELECT 1 FROM pg_roles WHERE rolname='vagrant'"
+create_user = "createuser -s -e -w vagrant"
+execute "psql postgres -tAc \"#{sql}\" | grep -q 1 || #{create_user}" do
+  user "postgres"
+end
+
+sql = "SELECT 1 FROM pg_roles WHERE rolname='vagrant'"
+execute "createdb" do
+  user "vagrant"
+  not_if { "psql postgres -tAc \"#{sql}\" | grep -q 1" }
+end
+
+git "/usr/local/rbenv" do
+  repository "https://github.com/sstephenson/rbenv.git"
+end
+
+file "/etc/profile.d/rbenv.sh" do
+  content <<-CONTENT
+export RBENV_ROOT="/usr/local/rbenv"
+export PATH="/usr/local/rbenv/bin:$PATH"
+eval "$(rbenv init -)"
+  CONTENT
+end
+
+directory "/usr/local/rbenv/plugins"
+git "/usr/local/rbenv/plugins/ruby-build" do
+  repository "https://github.com/sstephenson/ruby-build.git"
+end
+
+ruby_version = `cat .ruby-version`.strip
+bash "install_ruby" do
+  user "root"
+  not_if { ::Dir.exist?("/usr/local/rbenv/versions/#{ruby_version}") }
+  code <<-EOH
+source /etc/profile.d/rbenv.sh
+rbenv install #{ruby_version}
+rbenv global #{ruby_version}
+  EOH
+end
+
+bash "install_bundler" do
+  user "root"
+  code <<-EOH
+source /etc/profile.d/rbenv.sh
+gem install bundler --no-ri --no-rdoc
+  EOH
+end
+
+["postgresql"].each do |service_name|
+  service service_name do
+    action [:enable, :start]
+  end
+end