linux/debian/linux-perf.preinst

#!/bin/sh

set -e

old_version_suffix=$(printf '%s' "$2" | sed -En 's/^([0-9]+\.[0-9]+).*/\1/p')
if [ -n "${old_version_suffix}" ] ; then
    dpkg-maintscript-helper symlink_to_dir \
      /usr/share/doc/linux-perf "linux-perf-${old_version_suffix}" '5.16~rc8-1~exp1' linux-perf -- "$@"
fi
unset old_version_suffix

case "$1" in
install | upgrade )
    for wrapper in \
      /usr/bin/perf \
      /usr/share/bash-completion/completions/perf \
      /usr/share/man/man1/perf.1.gz \
    ; do
        diversion="${wrapper%/perf*}/perf.wrapper${wrapper#*/perf}"
        dpkg-divert --package linux-perf --divert "${diversion}" --rename --add "${wrapper}"
    done ; unset wrapper diversion
;;
esac

#DEBHELPER#