# -*- mode: ruby -*-
# vi: set ft=ruby :
#
# Vagrantfile
# Copyright 2015 Ryan McLean (ryan1_00 -at- hotmail -dot- com)
# http://ninet.org
# Version 0.1
# 
# Configures a build system for the Raspberry Pi Kernel
#
#######################
VMCPUS=4
RAM=4096
HTTPDEB="http://ftp.uk.debian.org/debian/"
BUILDROOT="/rpibuild"

# x64 or i386
$ARCH="i386"

#######################
# CPUs to use for Compiling
CCPUS=VMCPUS.to_i + 1   

DEBIMG32="https://dl.dropboxusercontent.com/s/60pv9an852jx9y0/Debian-7.3.0-i386b.box?dl=1"
DEBIMG64="https://github.com/jose-lpa/packer-debian_7.6.0/releases/download/1.0/packer_virtualbox-iso_virtualbox.box"

#######################
$readMeScript = <<SCRIPT
  sudo -u vagrant echo "Good Resource on how to compile" > #{BUILDROOT}/README
  sudo -u vagrant echo "http://mitchtech.net/raspberry-pi-kernel-compile/" >> #{BUILDROOT}/README
SCRIPT

$aptScript = <<SCRIPT
  apt-get update
  apt-get -y install build-essential git libncurses5-dev
  mkdir -p #{BUILDROOT}/{tools,linux,scripts,modules}
  chown -R vagrant:vagrant #{BUILDROOT}/
SCRIPT

$aptsrcScript = <<SCRIPT
  echo "">> /etc/apt/sources.list
  echo "deb #{HTTPDEB} wheezy main contrib non-free" >> /etc/apt/sources.list
  echo "deb #{HTTPDEB} wheezy-backports main" >> /etc/apt/sources.list
  echo "deb #{HTTPDEB} jessie main contrib non-free" >> /etc/apt/sources.list

  echo "" >> /etc/apt/preferences
  echo "Package: *" >> /etc/apt/preferences
  echo "Pin: release a=testing" >> /etc/apt/preferences
  echo "Pin-Priority: 10" >> /etc/apt/preferences

  echo "" >> /etc/apt/preferences
  echo "Package: *" >> /etc/apt/preferences
  echo "Pin: release a=stable" >> /etc/apt/preferences
  echo "Pin-Priority: 900" >> /etc/apt/preferences
SCRIPT

$aptLIBC6Script = <<SCRIPT
  apt-get update
  echo 'libc6 libraries/restart-without-asking boolean true' | debconf-set-selections
  apt-get -y install -t testing libc6-dev
SCRIPT

$gitScript = <<SCRIPT
  sudo -u vagrant git clone git://github.com/raspberrypi/tools.git --depth 1 #{BUILDROOT}/tools/
  sudo -u vagrant git clone --depth=1 https://github.com/raspberrypi/linux #{BUILDROOT}/linux/
SCRIPT

$buildScript = <<SCRIPT
  sudo -u vagrant echo cd #{BUILDROOT}/linux > #{BUILDROOT}/scripts/xcompile
  sudo -u vagrant echo "make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- bcmrpi_defconfig" >> #{BUILDROOT}/scripts/xcompile
  sudo -u vagrant echo "make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- -j#{CCPUS}" >> #{BUILDROOT}/scripts/xcompile

  sudo -u vagrant echo "make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- INSTALL_MOD_PATH=#{BUILDROOT}/modules/ modules_install -j#{CCPUS}" >> #{BUILDROOT}/scripts/xcompile
  sudo -u vagrant echo "cd #{BUILDROOT}/tools/mkimage/" >> #{BUILDROOT}/scripts/xcompile
  sudo -u vagrant echo "./imagetool-uncompressed.py #{BUILDROOT}/linux/arch/arm/boot/Image" >> #{BUILDROOT}/scripts/xcompile

  chmod -R 755 #{BUILDROOT}/scripts/*
SCRIPT

if $ARCH == "i386"
$pathScript = <<SCRIPT
  echo "export PATH=#{BUILDROOT}/tools/arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian/bin:\$PATH" >> /home/vagrant/.bashrc
SCRIPT
else
$pathScript = <<SCRIPT
  echo "export PATH=#{BUILDROOT}/tools/arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian-x64/bin:\$PATH" >> /home/vagrant/.bashrc
SCRIPT
end

Vagrant.configure(2) do |config|
  if $ARCH == "i386"
    config.vm.box = "wheezy"
    config.vm.box_url = "#{DEBIMG32}"
  else
    config.vm.box = "wheezy64"
    config.vm.box_url = "#{DEBIMG64}"
  end

  config.vm.provision "shell", inline: $aptScript
  config.vm.provision "shell", inline: $aptsrcScript
  config.vm.provision "shell", inline: $aptLIBC6Script
  config.vm.provision "shell", inline: $gitScript 
  config.vm.provision "shell", inline: $buildScript
  config.vm.provision "shell", inline: $pathScript 
  config.vm.provision "shell", inline: $readMeScript

  config.vm.provider "virtualbox" do |vb|
    vb.gui = false
    vb.memory = "#{RAM}"
    vb.cpus = "#{VMCPUS}"
  end
end