#!/bin/bash
# gund v 2005-12-13-c

cmd=$0
opt=$1

echo "Gentoo Update Notification Dragon '$cmd' on:" `/usr/bin/hostname`
echo "Options: self,sync,glsa,update,revdep,clean,depclean,prune"

export FEATURES="notitles strict"
export NOCOLOR="true"
export PATH=/bin:/usr/bin
export PORTAGE_NICENESS=15

# If any of these phrases are listed in the emerge output 
#  the automatic update will not take place, is passed to egrep
no_auto="apache|glibc|postgresql|ssh"

if [ "$opt" = "self" ]; then
  # neat that I can overwrite myself while I'm running and start it.
  echo "Updrading Self..."
  wget -q -O- http://www.edoceo.com/dl/gund > $cmd
  exit
fi

if [ -z $opt ] || [ "$opt" = "sync" ]; then
  emerge --sync >/dev/null || exit
fi

# GLSA
if [ -z $opt ] || [ "$opt" = "glsa" ]; then
  echo "* GLSA Checks"
  buf=`glsa-check --test all 2>&1 |grep '^[0-9]'`
  for glsa in $buf
  do
    glsa-check --print $glsa 2>/dev/null|head -n2
    glsa-check --pretend $glsa 2>/dev/null|egrep '^The following|    '
    echo
  done
fi

# Update
# note: may not want --deep in here
if [ -z $opt ] || [ "$opt" = "update" ]; then
  echo "* Checking for updates [ -DNpuv ]"
  buf=`emerge -DNpuv --nospinner world |grep '^\[ebuild'`
  if [ -n "$buf" ]; then
    echo "${buf}" | /bin/egrep ${no_auto} >/dev/null
    if [ "$?" != "0" ]; then
      echo "** Performing Automatic Update"
      echo $buf|sed 's/ +\[eb/\n\[eb/g'
      emerge -DNu --nospinner world >/dev/null
    else
      echo "** Manual Update Required, fetching"
      # uncomment below to perform download now
      emerge -DNu --fetch-only >/dev/null
      echo $buf|sed 's/ \[eb/\n\[eb/g'
    fi
  fi
fi

# Revdeps
if [ -z $opt ] || [ "$opt" = "revdep" ] ; then
  if [ -e /usr/bin/revdep-rebuild ]; then
    echo "* Reverse Dependency required rebuilds"
    revdep-rebuild --pretend --quiet | egrep '^  broken|^\[ebuild'
    rm ./.revdep-rebuild.*
  fi
fi

# Packages that can be removed
if [ -z $opt ] || [ "$opt" = "clean" ]; then
  echo "* Cleaning [ -cpv world ]"
  emerge --clean --nospinner --pretend --verbose world
fi
if [ -z $opt ] || [ "$opt" = "depclean" ]; then
  echo "* Useless Packages [ --depclean -pv ]"
  emerge -pv --depclean --nospinner | egrep '^ \w+'
fi
if [ -z $opt ] || [ "$opt" = "prune" ]; then
  echo "* Packages to prune [ -pPv ]"
  emerge -pPv --nospinner | egrep '^ \w+|^ +selected'
fi