Put this into bin folder of a rails 4.2 app and run it ...

Ultimate setup

#!/usr/bin/env ruby
require 'pathname'

# path to your application root.
APP_ROOT = Pathname.new File.expand_path('../../',  __FILE__)

Dir.chdir APP_ROOT do
  # This script is a starting point to setup your application.
  # Add necessary setup steps to this file:

  puts "[ boooootstrap:host ] Installing gem dependencies ..."
  system "gem install bundler --conservative"
  system "bundle check || bundle install --clean"

  puts "[ boooootstrap:host ] Creating config files ..."
  unless File.exist?("config/database.yml")
    system "cp config/database.yml.example config/database.yml"
  end

  puts "[ boooootstrap:database ] Setting development database ..."
  system "bin/rake db:setup"

  # puts "[ boooootstrap:database ] Dropping development database ..."
  # system "bin/rake db:drop"
  #
  # puts "[ boooootstrap:database ] Creating development database ..."
  # system "bin/rake db:create"
  #
  # puts "[ boooootstrap:database ] Migrating development database ..."
  # system "bin/rake db:migrate"
  # puts "[ boooootstrap:database ] Migrating test database ..."
  # system "bin/rake db:migrate RAILS_ENV=test"

  puts "[ boooootstrap:database ] Seeding development database ..."
  system "bin/rake db:seed"
  puts "[ boooootstrap:database ] Seeding test database ..."
  system "bin/rake db:seed RAILS_ENV=test"

  puts "[ boooootstrap:test ] Running tests ..."
  system "bin/rake test"

  puts "[ boooootstrap:env ] Clearing tmp files ..."
  system "bin/rake log:clear"
  system "bin/rake tmp:create"
  system "bin/rake tmp:clear"

  puts "[ boooootstrap:env ] Loading dotenv variables ..."
  system "bin/rake dotenv"

  puts "[ boooootstrap:run ] Analyzing codebase ..."
  system "bin/rake stats"

  puts "[ boooootstrap:run ] Considering ..."
  system "bin/rake notes"

  puts "[ boooootstrap:run ] Starting rails server ..."
  system "bin/bundle exec foreman start"
end