#!/usr/bin/env bash
# build.sh — fetch and build libADLMIDI, then compile render_opl.
# Idempotent: skips anything already present. Run once per machine.
set -euo pipefail
cd "$(dirname "$0")"
LIBDIR="${OPL_LIBDIR:-/opt/libADLMIDI}"

if [ ! -f "$LIBDIR/build/libADLMIDI.a" ]; then
    echo "cloning libADLMIDI..."
    git clone --depth 1 -q https://github.com/Wohlstand/libADLMIDI.git "$LIBDIR"
    echo "building (a few minutes)..."
    cmake -B "$LIBDIR/build" -S "$LIBDIR" -DCMAKE_BUILD_TYPE=Release >/dev/null
    cmake --build "$LIBDIR/build" -j"$(nproc)" --target ADLMIDI_static >/dev/null
fi

g++ -O2 -I "$LIBDIR/include" render_opl.cpp "$LIBDIR/build/libADLMIDI.a" \
    -o render_opl -lpthread
echo "built: $(pwd)/render_opl"