compile js files to coffee looking recursively into subdirectories and outputting to given folder

compile_js2coffee_recursively

#!/bin/bash
# requires https://www.npmjs.com/package/js2coffee

INPUT_FOLDER=$1
OUTPUT_FOLDER=$2

mkdir -p ${OUTPUT_FOLDER}

JS_FILE_LIST="`find ${INPUT_FOLDER} -type f -regex ".*\.\(js\)"`"

for js_file in ${JS_FILE_LIST}
do
    echo "compiling ${js_file} to coffee"
    COFFEE_FILE="`sed 's,^[^/]*/,,' <<< "${js_file%.js}.coffee"`"
    COFFEE_FILE="${OUTPUT_FOLDER}/${COFFEE_FILE}"
    COFFEE_DIR=$(dirname "${COFFEE_FILE}")
    `mkdir -p ${COFFEE_DIR}`
    `js2coffee ${js_file} > ${COFFEE_FILE}`
done

echo "done"