Transmission unrar script to handle Sonarr from prematurely moving files

unrarer.sh

#!/bin/bash

# The script could use more testing, but it works well for my needs
extract_rar() {
  isRar=$(ls ./*.rar)
  if [ -n "$isRar" ]; then
    # Handle an edge case with some distributors
    isPart01="$(ls ./*rar | grep -E part0*1.rar)"
    if [ -n "$isPart01" ]; then
      isRar=$isPart01
    fi
    toUnrar="$(pwd)/$isRar"
    # we need to move to new location so sonarr doesn't try to mv before its done
    # also, unrar doesn't support changing the filename on extracting, makes sense a little bit
    pushd /media/temp/unrar-staging
    fileName="$(unrar e -y "$toUnrar" | grep -E "^\\.\\.\\..*OK" | awk '{ print $2 }')"
    # put it back so sonarr can now find it
    mv "$fileName" $(dirname "$toUnrar")
    popd
  fi
}

echo "Starting  - $(date)"

cd "$TR_TORRENT_DIR" || exit

if [ -d "$TR_TORRENT_NAME" ]; then
  cd "$TR_TORRENT_NAME"
  #handle multiple episode packs, like those that contain a whole season, or just a single episode
  for rar in $(find . -name '*.rar' -exec dirname {} \; | sort -u);
  do
    pushd $rar
    extract_rar
    popd
  done
fi