Get a shortened hash of a directory that has been zipped up

short_hash_a_directory.sh

#!/bin/bash

DIRECTORY_PATH="some/path/dir"
LENGTH=10

zip --quiet --recurse-paths TEMP.zip \
    ${DIRECTORY_PATH} \
    --exclude "**/<SOME SUB DIR>/*" "**/*.<SOME FILE EXTENSION>"

shasum -a 256 TEMP.zip \
  | awk '{ print $1 }' \
  | tail --bytes ${LENGTH)

rm -f TEMP.zip