AoC get input script

getinput.sh

#!/bin/bash

if [ -z "$1" ]; then
    echo "Missing day number as argument!"
    exit 1
fi

SESSION=""
DAY="$1"
YEAR="2020"
URL="https://adventofcode.com/$YEAR/day/$DAY/input"
FILE=input$DAY.txt
CODE=day_$DAY.py
CODE_TEMPLATE=day_template.py

if [ -z "$SESSION" ]; then
    echo "No session set"
    exit 1
fi

if [ ! -e $FILE ]; then
    echo "# Downloading file for day $DAY"
    curl -s --cookie "session=$SESSION" $URL > $FILE
else    
    echo "# File for day $DAY already exists"
fi

if [ ! -e $CODE ]; then
    echo "# Generating template file $CODE"

    cp $CODE_TEMPLATE $CODE
    sed -i "s/@INPUT_FILE@/$FILE/g" $CODE
fi

echo "#"
echo "# Size:  " $(stat --printf="%s" $FILE)
echo "# Lines: " $(cat $FILE | wc -l)
echo "#"
echo "# Sample data:"
head $FILE