#! /usr/bin/env bash

TFTPDIR=/srv/tftp
MENU=$TFTPDIR/boot.txt
DEFAULTCONFIG=$TFTPDIR/pxelinux.cfg
DEFAULTFILE=$DEFAULTCONFIG/default
MIRROR=ftp://ftp.us.debian.org
DOWNLOADDIR=/tmp
TEMPDIR=$DOWNLOADDIR/working

mkdir -p $DEFAULTCONFIG

if [ ! -e $DEFAULTFILE ]
then
   echo 'DISPLAY boot.txt' > $DEFAULTFILE
   echo '' >> $DEFAULTFILE
   echo 'prompt 1'  >> $DEFAULTFILE
   echo 'timeout 0' >> $DEFAULTFILE
   echo '' >> $DEFAULTFILE
fi

if [ ! -e $MENU ]
then
   echo 'Available Boot Options:' > $MENU
   echo '=======================' >> $MENU
   echo '' >> $MENU
fi
   

for arch in i386 amd64
do
   for dist in jessie wheezy
   do
      echo Setting up $dist, $arch
      THISDOWNLOAD=$DOWNLOADDIR/$dist/$arch
      if [ ! -e $THISDOWNLOAD/netboot.tar.gz ]
      then
         mkdir -p $THISDOWNLOAD
         cd $THISDOWNLOAD
         wget -q $MIRROR/debian/dists/$dist/main/installer-$arch/current/images/netboot/netboot.tar.gz
      fi
      if [ -e $TEMPDIR ]
      then
         rm -fR $TEMPDIR
      fi
      mkdir -p $TEMPDIR
      cd $TEMPDIR
      tar -xzf $THISDOWNLOAD/netboot.tar.gz
      THISINSTALL=$TFTPDIR/debian/$dist
      if [ -e $THISINSTALL ]
      then
         rm -fR $THISINSTALL
      fi
      mkdir -p $THISINSTALL
      mv $TEMPDIR/debian-installer/* $THISINSTALL/
      # create an entry in default and menu
      echo label $dist\_$arch\_install >> $DEFAULTFILE
      echo "menu label ^Install $dist $arch" >> $DEFAULTFILE
      echo "kernel debian/$dist/$arch/linux" >> $DEFAULTFILE
      echo "append vga=normal initrd=debian/$dist/$arch/initrd.gz -- quiet" >> $DEFAULTFILE
      echo '' >> $DEFAULTFILE
      echo $dist\_$arch\_install  \-\- Install Debian $dist $arch >> $MENU
   done
done