prerm is in juju-0.7 0.7-0ubuntu2.
This file is a maintainer script. It is executed when installing (*inst) or removing (*rm) the package.
The actual contents of the file can be viewed below.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 | #!/bin/sh
set -e
VER="0.7"
case "$1" in
  remove|upgrade|deconfigure)
    update-alternatives --remove juju /usr/lib/juju-$VER/bin/juju
    ;;
  failed-upgrade)
    echo "$1"
    ;;
  *)
    echo "prerm called with unknown argument \`$1'" >&2
    exit 0
    ;;
esac
# Automatically added by dh_python2:
if which pyclean >/dev/null 2>&1; then
	pyclean -p juju-0.7 
else
	dpkg -L juju-0.7 | grep \.py$ | while read file
	do
		rm -f "${file}"[co] >/dev/null
  	done
fi
# End automatically added section
exit 0
 |