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

# Vagrantfile API/syntax version. Don't touch unless you know what you're doing!
VAGRANTFILE_API_VERSION = "2"

Vagrant.configure(VAGRANTFILE_API_VERSION) do |config|
  # We base ourselves off Debian Jessie
  config.vm.box = "debian/jessie64"

  if Vagrant.has_plugin?("vagrant-vbguest") then
    # vagrant-vbguest is a Vagrant plugin that upgrades
    # the version of VirtualBox Guest Additions within each
    # guest. If you have the vagrant-vbguest plugin, then it
    # needs to know how to compile kernel modules, etc., and so
    # we give it this hint about operating system type.
    config.vm.guest = "debian"
  end

  # We forward port 6080, the Sandstorm web port, so that developers can
  # visit their sandstorm app from their browser as local.sandstorm.io:6080
  # (aka 127.0.0.1:6080).
  config.vm.network :forwarded_port, guest: 6080, host: 6080

  # Use a shell script to "provision" the box. This installs Sandstorm using
  # the bundled installer.
  config.vm.provision "shell", inline: "sudo bash /opt/app/.sandstorm/global-setup.sh"
  # Then, do stack-specific and app-specific setup.
  config.vm.provision "shell", inline: "sudo bash /opt/app/.sandstorm/setup.sh"

  # Shared folders are configured per-provider since vboxsf can't handle >4096 open files,
  # NFS requires privilege escalation every time you bring a VM up,
  # and 9p is only available on libvirt.

  # Calculate the number of CPUs and the amount of RAM the system has,
  # in a platform-dependent way; further logic below.
  cpus = nil
  total_kB_ram = nil

  host = RbConfig::CONFIG['host_os']
  if host =~ /darwin/
    cpus = `sysctl -n hw.ncpu`.to_i
    total_kB_ram =  `sysctl -n hw.memsize`.to_i / 1024
  elsif host =~ /linux/
    cpus = `nproc`.to_i
    total_kB_ram = `grep MemTotal /proc/meminfo | awk '{print $2}'`.to_i
  end
  # Use the same number of CPUs within Vagrant as the system, with 1
  # as a default.
  #
  # Use at least 512MB of RAM, and if the system has more than 2GB of
  # RAM, use 1/4 of the system RAM. This seems a reasonable compromise
  # between having the Vagrant guest operating system not run out of
  # RAM entirely (which it basically would if we went much lower than
  # 512MB) and also allowing it to use up a healthily large amount of
  # RAM so it can run faster on systems that can afford it.
  if cpus.nil?
    cpus = 1
  end
  if total_kB_ram.nil? or total_kB_ram < 2048000
    assign_ram_mb = 1024
  else
    assign_ram_mb = (total_kB_ram / 1024 / 4)
  end
  # Actually apply these CPU/memory values to the providers.
  config.vm.provider :virtualbox do |vb, override|
    vb.cpus = cpus
    vb.memory = assign_ram_mb

    override.vm.synced_folder "..", "/opt/app"
    override.vm.synced_folder ENV["HOME"] + "/.sandstorm", "/host-dot-sandstorm"
    override.vm.synced_folder "..", "/vagrant"
  end
  config.vm.provider :libvirt do |libvirt, override|
    libvirt.cpus = cpus
    libvirt.memory = assign_ram_mb
    libvirt.random_hostname = true

    override.vm.synced_folder "..", "/opt/app", type: "9p", accessmode: "passthrough"
    override.vm.synced_folder ENV["HOME"] + "/.sandstorm", "/host-dot-sandstorm", type: "9p", accessmode: "passthrough"
    override.vm.synced_folder "..", "/vagrant", type: "9p", accessmode: "passthrough"
  end
end