#!/usr/bin/env bash
# Launch the built DOS example in DOSBox. Defaults to PATTERN; pass
# "hello" to run HELLO instead.
#
#   scripts/run-dos.sh           # runs PATTERN
#   scripts/run-dos.sh hello     # runs HELLO

set -euo pipefail

prog=${1:-pattern}
repo=$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)
bin_dir=$repo/build/dos/bin

case $prog in
    hello)   file=HELLO.EXE ;;
    pattern) file=PATTERN.EXE ;;
    *) echo "usage: $0 [hello|pattern]" >&2; exit 2 ;;
esac

if [[ ! -f "$bin_dir/$file" ]]; then
    echo "$bin_dir/$file not built. Run 'make dos' first." >&2
    exit 1
fi

exec dosbox -c "C:" -c "$file" -c "pause" --exit "$bin_dir"