#!/bin/bash

compiz_git_packages="compiz-fusion \
compiz \
libcompizconfig \
compizconfig-python \
compiz-bcop \
compizconfig-backend-kconfig \
compiz-fusion-plugins-main \
compiz-fusion-plugins-extra \
compiz-fusion-plugins-wallpaper \
compiz-plugins-screensaver \
compiz-fusion-plugins-unsupported \
x11-apps/fusion-icon \
x11-apps/ccsm \
x11-wm/emerald \
x11-themes/emerald-themes  
compiz-fusion"

update_overlay() {
   layman -s desktop-effects
}

case "$1" in
   "merge")
      echo -e "Updating desktop-effects overlay"
      update_overlay
      echo -e "Purging packages"
      emerge -C ${compiz_git_packages}
      echo -e "Emerging packages"
      emerge --oneshot --ask --verbose ${compiz_git_packages}
      ;;

   "backup")
      echo "Making binary package backups of currently emerged compiz-fusion packages."
      quickpkg ${compiz_git_packages}
      ;;

   "revert")
      echo "Reverting to the most recent binary backups of the compiz-fusion git packages."
      emerge --oneshot --ask --verbose --usepkgonly  ${compiz_git_packages}
      ;;

   "purge_git")
      echo "Cleaning all files downloaded from git."
      rm -rf /usr/portage/distfiles/git-src/*
      ;;

   *)
      echo -e "`basename ${0}` usage:\n"
      echo -e "`basename ${0}` backup"
      echo -e "Make binary packages out of the currently merged compiz-fusion packages.\n"
      echo -e "`basename ${0}` merge"
      echo -e "Remerge compiz-fusion packages.\n"
      echo -e "`basename ${0}` revert"
      echo -e "Revert to the most recent binary backups of the compiz-fusion git packages.\n"
      echo -e "`basename ${0}` purge_git"
      echo -e "Purge all files downloaded from git.\n"
      ;;
esac

exit 0