#!/bin/bash
# autodepclean script v 0.01 released under GPL v3 by Walter Dnes 2010/08/18
# Generates a file "cleanscript" to remove unused ebuilds, including
# buildtime-only dependancies.
#
# Warning; this script is still beta.  I recommend that you check the output
# in cleanscript before running it.  It is agressive about removing unused
# gentoo-sources versions.  This includes those that are higher than your
# current kernel.  This is technically correct for removing unused ebuilds,
# but it may not be what you want.
#
echo "#!/bin/bash" > cleanscript
echo "#" > cleanscript.000
emerge --pretend --depclean |\
  grep -A1 "^ .*/" |\
  grep -v "^ \*" |\
  grep -v "^--" |\
  sed ":/: {
N
s:\n::
s/    selected: /-/
s/^ /emerge --depclean =/
}" >> cleanscript.000
while read
do
  echo "${REPLY}" >> cleanscript
  if [ "${REPLY:0:6}" == "emerge" ]; then
    echo "revdep-rebuild" >> cleanscript
  fi
done < cleanscript.000
chmod 744 cleanscript