#!/bin/sh
set -e

# install-info has an unstable sort order when a new section is added
# Fixed by https://git.savannah.gnu.org/cgit/texinfo.git/commit/?id=01b5a4b9c33bef08feae041c221f820a1c76749f
#
# The postinst-hook of install-info depends on the natural order of the
# filesystem and deletes the existing dir file beforehand.
# Installing the same info.gz file again follows a different code path,
# which has a stable sort order

# Don't run if install-info is not installed
if [ ! -x /usr/bin/install-info ];
then
  exit 0
fi

# Don't run if install-info is sufficiently new
if dpkg --compare-versions $(dpkg-query --show --showformat '${Version}\n' install-info | head -1) gt 7.2~;
then
  exit 0
fi

# Keep the original file
cp /usr/share/info/dir /tmp/before

# dir, dircolors, dirname / pr, printenv, printf / tr, true, truncate / who, whoami
install-info /usr/share/info/coreutils.info.gz /usr/share/info/dir
# diff, diff3
install-info /usr/share/info/diffutils.info.gz /usr/share/info/dir
# dirmngr, dirmngr-client
if [ -e /usr/share/info/gnupg.info.gz ];
then
  install-info /usr/share/info/gnupg.info.gz /usr/share/info/dir
fi

# Only report when the hook has made a difference
if ! diff /tmp/before /usr/share/info/dir > /dev/null;
then
  echo "P: $(basename $0) Reproducible hook has been applied"
fi
rm -f /tmp/before