#!/bin/bash
usage() {
  echo "Usage: ./base64img [FILE]"
  echo "Formats: APNG BMP GIF JPEG PNG WEBP"
}
# Print usage and exit if the file was not provided
[ $# -eq 0 ] && usage && exit 1
# Grab the image format
fmt=$(file "$1" | grep -iEo 'apng|bmp|gif|jpeg|png|webp' | head -n1 | tr '[:upper:]' '[:lower:]')
# Check if the image format is supported
[ -z "$fmt" ] && usage && exit 1
# Create an IMG template
img="data:image/"$fmt";base64, $(base64 -w 0 "$1")"
echo "$img"