Which pacman package supplies this binary

whothis.sh

#!/usr/bin/env bash

echo "Who this :) <21"

if [ "$1" = "" ]; then
  echo "Missing arg"
  exit 1
fi

filepath=$(which $1 2> /dev/null)

if [ $? -gt 0 ]; then
  echo "'$1' not found in path"
  exit 1
fi

pacman -Qo "$filepath" 2> /dev/null

if [ $? -gt 0 ]; then
  echo "No package supplies $1"
fi

Install: Add to $PATH
Usage: whothis bash