#!/bin/sh
set -e
test "$1" = configure || exit 0

# Snippet based on dpkg-maintscript-helper from dpkg 1.15.8.  Using a
# home-grown snippet instead of using Pre-Depends: dpkg (>= 1.15.7)
# makes the package easier to try out on old systems without requiring
# new dpkg in these early times.
#
# Kind reader of the future: it's about time to rip this out and use a
# call to dpkg-maintscript-helper, don't you think?
rm_conffile () {
  CONFFILE=$1; shift
  if dpkg --compare-versions "$2" lt-nl '1:1.7.4.1-2~'; then
    if test -e "$CONFFILE.dpkg-backup"; then
      mv -f "$CONFFILE.dpkg-backup" "$CONFFILE.dpkg-bak"
    fi
    if test -e "$CONFFILE.dpkg-remove"; then
      echo "Removing $CONFFILE ..."
      rm -f "$CONFFILE.dpkg-remove"
    fi
  fi
}

removed_conffile=/etc/emacs/site-start.d/50git-core.el
rm_conffile "$removed_conffile" "$1" "$2"

# Carry over modifications so git-el can use them.
if dpkg --compare-versions "$2" lt '1:1.7.4.1-2~' &&
   ! test -e "$removed_conffile" &&
   test -r "$removed_conffile".dpkg-bak; then
  mv "$removed_conffile".dpkg-bak "$removed_conffile"
fi