#!/bin/bash
hda="disco.qcow2"
mem="8G"
diskSize="40G"
nCores="4"
pwd="$(pwd)";path=${BASH_SOURCE[0]}
dir="$(echo "$pwd/$path"| rev | cut -d "/" -f2-100|rev)"
cd $dir
iso="$(ls -1 *.iso | head -1)"
opt="$1"

function who { if [ "$(whoami)" = "root" ]; then exit; fi }

function createQcow2 {
  qemu-img create -f qcow2 "$hda" $diskSize
}

function checkQcow2 { if [ ! -f "$dir/$hda" ]; then createQcow2; fi }

function bootCD {
  qemu-system-x86_64 -enable-kvm -m $mem -cpu host -smp cpus=$nCores -machine type=pc,accel=kvm -boot d -cdrom $iso -hda $hda
}

function bootHD {
  qemu-system-x86_64 -enable-kvm -m $mem -cpu host -smp cpus=$nCores -machine type=pc,accel=kvm -net nic,model=e1000 -hda $hda -net user
}

function showHelp {
  echo -e "start.sh - fanta <fanta@56k.es>\n"
  echo "--help Show this help"
  echo "--hd Boot from HD"
  echo -e "--cdrom To install system booting from iso (cdrom)\n"
}

function checkOpt {
  if [ -z "$opt" ]; then showHelp; fi
  if [ "$opt" = "--help" ]; then showHelp; fi
  if [ "$opt" = "--hd" ]; then bootHD; fi
  if [ "$opt" = "--cdrom" ]; then bootCD; fi
}

function main() {
  who
  checkQcow2
  checkOpt
}

main