mmdebstrap/tests/fail-installing-to-existing-file

#!/bin/sh
set -eu
export LC_ALL=C.UTF-8

trap "rm -f /tmp/exists" EXIT INT TERM

touch /tmp/exists
ret=0
{{ CMD }} --mode={{ MODE }} --variant=apt {{ DIST }} /tmp/exists {{ MIRROR }} || ret=$?
if [ "$ret" = 0 ]; then
  echo expected failure but got exit $ret >&2
  exit 1
fi