create-source.sh

#!/bin/bash

# Common functions
function real_base_name () {
  target=$1

  (
  while true; do
    cd "$(dirname "$target")"
    target=$(basename "$target")
    link=$(readlink "$target")
    test "$link" || break
    target=$link
  done

  echo "$(pwd -P)"
  )
}

function output () {
    echo "$@"
}

function output_error () {
    >&2 echo "$@"
}

function fail () {
    >&2 echo "$@"
    exit 1
}

function usage {
    output_error "Usage: $BASH_SOURCE [--year <YEAR> --day <DAY>]"
    output_error "--year: Year, defaults to current"
    output_error "--day: Day, defaults to current"
    exit 1
}

YEAR="$(date +"%Y")"
DAY="$(date +"%-d")"
TOKEN="$AOC_SESSION_TOKEN"

while [[ $# -gt 0 ]]
    do
    key="$1"
    case $key in
    --help)
      usage
    ;;
    --day)
      shift
      DAY="$1"
      ;;
    --year)
      shift
      YEAR="$1"
      ;;
    *)
      output_error "Unknown option: $key"
      usage
    ;;
    esac
    shift # past argument or value
done

SCRIPT_DIR=$(real_base_name "$0")

cd "$SCRIPT_DIR"

mkdir -p "./src/main/kotlin/com/behindmedia/adventofcode/year${YEAR}/day${DAY}"

FILE="./src/main/kotlin/com/behindmedia/adventofcode/year${YEAR}/day${DAY}/Day${DAY}.kt"

if [ -f "$FILE" ]; then
  fail "File $FILE already exists"
fi

cat > "$FILE" << EOF
package com.behindmedia.adventofcode.year${YEAR}.day${DAY}

import com.behindmedia.adventofcode.common.*
import kotlin.math.*

private fun solve(fileName: String, part: Int) {
    val data = parseLines("/${YEAR}/" + fileName) { line ->
        line
    }
    println(data)
}

fun main() {
    for (part in 1..2) {
        solve("day${DAY}-sample1.txt", part)
        solve("day${DAY}.txt", part)
    }
}
EOF

output "Wrote file $FILE"