quick and dirty dev setup for macos

setup.rb

#!/usr/bin/env ruby
require 'open3'

ENV["HOMEBREW_NO_AUTO_UPDATE"] = "1"
ENV["HOMEBREW_INSTALL_URL"] ||= "https://raw.githubusercontent.com/Homebrew/install/master/install"

def system!(*args)
  system(*args) || abort("\n== Command #{args} failed ==")
end

def install! cask_name, *cmd
  Open3.popen3("which", cask_name.to_s) do |_, stdout, _, thread|
    if thread.value.success?
      puts "   Found at #{stdout.read.chomp}. Skipping."
    else
      cmd ||= [ :brew, :cask, :install, cask_name ]
      system! *cmd
    end
  end
end

puts "This script will setup a development environment on this Mac."
puts "It will install the following."
puts
puts " * Homebrew"
puts "   from #{ENV["HOMEBREW_INSTALL_URL"]}"
puts "   which you might want to review for security measures."
puts " * Git"
puts " * VirtualBox"
puts " * Vagrant"
puts
puts "Enter YES to continue. Everything else will stop this script."

exit 1 unless "YES" == gets.chomp
puts

puts ">> Homebrew"
install! :brew, %[ /usr/bin/ruby -e "$(curl -fsSL #{ENV["HOMEBREW_INSTALL_URL"]})" ]
system! %[ brew tap | grep -q "homebrew/tap" || brew tap homebrew/cask ]

puts ">> Git"
install! "git"

puts ">> VirtualBox"
install! "virtualbox"

puts ">> Vagrant"
install! "vagrant"

puts
puts "Done."