bash parallel on multi-file

#!/usr/bin/env bash

readonly SCRIPT_DIR=$(dirname $(readlink -m $0));

function main
{
  if [ -z "$1" ]  && [ -z "${2}" ]; then
    error_exit "Argument Identifiant projet attentu : bash ${0} path"
  fi

  set -o errexit
  set -o pipefail
  set -o nounset
  set -o errtrace

  local path=$1

  local files=$(find $path -name "*.html")

  NPROC=0
  for f in $files; do
    # execute my commands here
    # python script.py
    NPROC=$(($NPROC+1))
    if [ "$NPROC" -ge 10 ]; then
        wait
        NPROC=0
    fi
  done

}

function error_exit
{
  echo "$1" 1>&2
  exit 1
}

main "$@"