iu

#!/usr/bin/env bash
set -euo pipefail

usage() {
  >&2 cat <<HELP
Usage: $(basename "$0") [filepath [...]]

Like 'du -s ...' but counts inodes rather than blocks.

If no arguments are provided, defaults to list of directories
that are immediate children of the current working directory.
HELP
}

TOPS=()
while [[ $# -gt 0 ]]; do
  case $1 in
    -h|--help)
      usage
      exit 0
      ;;
    *)
      TOPS+=("$1")
      ;;
  esac
  shift
done

# use gfind if it's available
if command -v gfind >/dev/null 2>&1; then
  # FIXME: there's probably a better way to support multiple platforms
  shopt -s expand_aliases
  alias find=gfind
fi

if [[ ${#TOPS[@]} -eq 0 ]]; then
  mapfile -t TOPS < <(find . -mindepth 1 -maxdepth 1 -type d -printf '%f\n')
fi

for TOP in "${TOPS[@]}"; do
  printf '%d\t%s\n' "$(find "$TOP" -printf 0 | wc -c)" "$TOP"
done