Find out which modules have no dependents

undep.sh

readonly files="path/to/scripts/entry.js"
readonly base="path/to/scripts"
readonly opts="-t whatever"

list_deps() {
  local entries=$1
  local opts=$2

  browserify $opts --list $entries \
  | sed "s:$(pwd)::"               \
  | grep $base                     \
  | sort                           \
  | uniq
}

list_files() {
  find $base -type f \
  | sort
}

main() {
  diff =(list_deps "$files" "$opts") =(list_files)
}

main