Naive script to have pandoc convert markdown file to tex

pantex.sh

#!/usr/bin/env bash

if [ -z "$1" ]; then
    echo "usage:"
    echo "    pantex <filename>"
    exit 1
fi

directory=$(dirname "$1")
filename=$(basename "$1")
extension="${filename##*.}"
filename="${filename%.*}"

pandoc "$1" -f markdown -t latex --smart -s -o "${directory}/${filename}".tex