#!/usr/bin/env bash

set -euo pipefail
set -x

# Ubuntu: apt update && apt install build-essential curl libncurses5-dev -y
# Mac: brew update && brew install curl gcc ncurses make

if ! command -v curl gcc make &> /dev/null; then
  echo "require: build-essential curl libncurses5-dev" >&2
  exit 1
elif command -v brew &> /dev/null && brew list | grep -q ncurses; then
  echo "require: ncurses" >&2
  exit 1
elif command -v apt &> /dev/null && apt list --installed | grep -q ncurses; then
  echo "require: ncurses" >&2
  exit 1
fi

# sl (2.02)
curl -Lo sl.tar 'https://web.archive.org/web/20070220170601if_/http://www.tkl.iis.u-tokyo.ac.jp:80/~toyoda/sl/sl.tar' 
tar xopf sl.tar
cd sl
# sl-h (sl5-1.patch)
curl -Lo sl5-1.patch 'https://web.archive.org/web/20090316133609/http://www.izumix.org.uk:80/sl/sl5-1.patch'
patch -p1 < sl5-1.patch
sed s_ncurses/__ sl.c > _
mv _ sl.c
make && mv sl sl-h