#!/bin/sh
# -*- mode: sh; tab-width: 8; coding: utf-8-unix -*-

# in box, unix generic, builder generic
ROLE=hostvms
PREFIX=/var/local
prog=$( basename $0 .bash )
. /usr/local/bin/usr_local_tput.bash

if [ -d /etc/portage ] ; then
    # maybe we should delete ALL the package.use and package.mask?
    # we did most of them as workarounds or to set the distfiles.zip
    rm -f "/etc/portage/package.use/grub.sh"
  fi

### CLEANUP TO SHRINK THE BOX ###

# a fresh install probably shouldn't nag about news
# chroot "" /usr/bin/eselect news read all > /dev/null 2>&1

INFO "delete in /tmp and /var/tmp"
rm -rf /tmp/*
rm -rf /var/tmp/*

# there's some leftover junk by gem installation in the root folder
# don't know where this is from (/root/.gem/specs/rubygems.org%80/...), but it should go...
# we use a global ruby by default
# ...probably hard coded path by mistake, report to upstream? Which upstream?!?
[ -d /root/.gem ] && rm -rf /root/.gem

INFO "cleaning kernel"
ls -l /usr/src 2>/dev/null && \
  for elt in /usr/src/linux-*/ ; do
    [ -f .config ] || continue
    INFO "kernel make clean in $elt"
    [ -d "$elt" ] || continue
    ( cd "$elt" && make clean )
  done

[ -f /root/bin/packer_clean_distfiles.bash ] && sh /root/bin/packer_clean_distfiles.bash

INFO "fill all free hdd space with zeros"
if df | grep /boot$ ; then
    dd if=/dev/zero of="/boot/EMPTY" bs=1M 2>/dev/null
    rm "/boot/EMPTY"
    sync
fi

dd if=/dev/zero of="/EMPTY" bs=1M 2>/dev/null
rm "/EMPTY"
sync

INFO "fill all swap space with zeros and recreate swap"
cat /proc/swaps |grep ^/ | cut -f 1 -d  ' '| while read dev ; do
    swapoff $dev || continue
    shred -n 0 -z $dev
    # FixMe: label?
    mkswap $dev
    sync
done

exit 0