#!/bin/sh
# Builds Scan 3.1 + dam_scan.cpp into scan/scan.js + scan/scan.wasm (WebAssembly, no threads).
# Usage: tools/scan/build.sh <scan source folder (the repo with src/ and data/)> <output folder>
# Needs Emscripten (emcc) on the PATH. Run by .github/workflows/scan.yml.
set -eu
SCAN="$1"
OUT="$2"
HERE="$(cd "$(dirname "$0")" && pwd)"
mkdir -p "$OUT"

SRCS=""
for f in "$SCAN"/src/*.cpp; do
  case "$(basename "$f")" in
    main.cpp|dxp.cpp|socket.cpp) ;; # terminal, DXP and network front ends are not used
    *) SRCS="$SRCS $f" ;;
  esac
done

emcc -O3 -std=c++14 -fno-rtti -fwasm-exceptions -DNDEBUG \
  -I"$SCAN/src" $SRCS "$HERE/dam_scan.cpp" \
  -o "$OUT/scan.js" \
  -sMODULARIZE=1 -sEXPORT_NAME=ScanModule \
  -sENVIRONMENT=web,worker,node \
  -sALLOW_MEMORY_GROWTH=1 -sINITIAL_MEMORY=64MB -sSTACK_SIZE=8MB \
  -sFORCE_FILESYSTEM=1 \
  -sEXPORTED_FUNCTIONS=_scan_init,_scan_go,_scan_new_game \
  -sEXPORTED_RUNTIME_METHODS=cwrap,FS

cp "$SCAN/data/eval" "$OUT/eval"
cp "$SCAN/data/book" "$OUT/book"
cp "$SCAN/license.txt" "$OUT/COPYING.txt"
ls -l "$OUT"

# compressed copies: the server sends these to browsers that accept gzip (eval 8.5 MB → 6.2 MB)
for f in scan.js scan.wasm eval book; do gzip -9 -n -k -f "$OUT/$f"; done