#!/usr/bin/env bash
set -e
init_tags=${BIZ_ROOT:?}/Biz/Ide/init_tags.sh
old=$1
new=$2
# filter out only the changed haskell files
changed=($(git diff --diff-filter=d --name-only $old $new -- '*.hs'))
if [[ ! -r tags ]]
then
    $init_tags
elif [[ ${#changed[@]} -gt 0 ]]
then
    $init_tags $changed
fi