#!/bin/sh

# Early versions of the xchpst package considered the dpkg-divert and
# update-alternatives mechanisms to provide a way of offering compat
# for xchpst when xchpst is not available. This mechanism was never
# used by another package and the runit package chose to offer an
# arrangement involving environment variables, so the alternatives can
# can now be retired. https://bugs.debian.org/1093545

set -e

undivert () {
  local from="$1"
  local to="$2"
  [ -z "$(dpkg-divert --list $from)" ] || dpkg-divert --rename \
    --package xchpst --divert "$to" --remove "$from"
}

# Unconditionally remove dpkg diversion
undivert /usr/bin/xchpst /usr/bin/xchpst.fake
undivert \
  /usr/share/man/man8/xchpst.8.gz \
  /usr/share/man/man8/xchpst.fake.8.gz

# Unconditionally remove 'alternatives'
update-alternatives --remove-all xchpst 2>/dev/null || true