#!/bin/bash -e

# Builds an AppImage using appimagetool.
# Run this script on an aarch64 computer, running modern debian or
#    something similar, otherwise it's not going to work...

VERSION="5.15.0"

BOLD="\033[1m"
GREEN="\033[32m"
RESET="\033[0m"

echo -e "${BOLD}Downloading deps...${RESET}"
apt-get install -y git g++ make ninja-build libc6-dev cmake libpng-dev libjpeg-dev libxi-dev libgl1-mesa-dev libsqlite3-dev libogg-dev libvorbis-dev libopenal-dev libcurl4-openssl-dev libfreetype6-dev zlib1g-dev libgmp-dev libsdl2-dev libzstd-dev libleveldb-dev gettext desktop-file-utils ca-certificates wget file --no-install-recommends

echo -e "${BOLD}Downloading LuaJIT and Luanti source code...${RESET}"
git clone --depth 1 https://github.com/LuaJIT/LuaJIT.git luajit
wget -O luanti.zip https://github.com/luanti-org/luanti/archive/refs/tags/${VERSION}.zip
unzip luanti.zip
mv luanti-${VERSION} luanti/

echo -e "${BOLD}Compiling LuaJIT...${RESET}"
pushd luajit
make amalg -j$(nproc)
popd

pushd luanti
mkdir -p build; cd build

# Download appimagetool
if [ ! -f appimagetool ]; then
	# Old version of appimagetool:
	#wget https://github.com/AppImage/AppImageKit/releases/download/continuous/appimagetool-aarch64.AppImage -O appimagetool
	echo -e "${BOLD}Downloading AppImageTool${RESET}"
	wget https://github.com/AppImage/appimagetool/releases/download/continuous/appimagetool-aarch64.AppImage -O appimagetool
	chmod +x appimagetool
fi

# Compile and install into AppDir
echo -e "${BOLD}Compiling Luanti...${RESET}"
cmake .. -G Ninja \
	-DCMAKE_BUILD_TYPE=Release \
	-DCMAKE_INSTALL_PREFIX=AppDir/usr \
	-DBUILD_UNITTESTS=OFF \
	-DENABLE_SYSTEM_JSONCPP=OFF \
	-DLUA_INCLUDE_DIR=../../luajit/src/ \
	-DLUA_LIBRARY=../../luajit/src/libluajit.a
ninja -j$(nproc)

objcopy --only-keep-debug ../bin/luanti luanti.debug
objcopy --strip-debug --add-gnu-debuglink=luanti.debug ../bin/luanti

ninja install -j$(nproc)

cd AppDir

echo -e "${BOLD}Building AppImage...${RESET}"
# Put desktop and icon at root
ln -sf usr/share/applications/org.luanti.luanti.desktop luanti.desktop
ln -sf usr/share/icons/hicolor/128x128/apps/luanti.png luanti.png
ln -sf luanti.png .DirIcon

# Fix locales
mv usr/share/locale usr/share/luanti

cat > AppRun <<\APPRUN
#!/bin/sh
APP_PATH="$(dirname "$(readlink -f "${0}")")"
export LD_LIBRARY_PATH="${APP_PATH}"/usr/lib/:"${LD_LIBRARY_PATH}"
exec "${APP_PATH}/usr/bin/luanti" "$@"
APPRUN
chmod +x AppRun

# List of libraries from the system that should be bundled in the AppImage.
INCLUDE_LIBS=(
	libopenal.so.1
	libSDL2-2.0.so.0
	 libsndio.so.7.0
	  libbsd.so.0
	   libmd.so.0
	libjpeg.so.62
	libpng16.so.16
	libvorbisfile.so.3
	 libogg.so.0
	 libvorbis.so.0
	libzstd.so.1
	libsqlite3.so.0
	libleveldb.so.1d
	 libsnappy.so.1
)

mkdir -p usr/lib/
for i in "${INCLUDE_LIBS[@]}"; do
	cp /usr/lib/aarch64-linux-gnu/$i usr/lib/
done

# Actually build the appimage
cd ..
ARCH=aarch64 ./appimagetool --appimage-extract-and-run AppDir/

# Move the appimage to this script's folder
mv Luanti-aarch64.AppImage ../../luanti-${VERSION}-aarch64.AppImage

# Clean up
cd ../..

rm -rf luanti{,.zip}
rm -rf luajit/

echo -e "${BOLD}${GREEN}Done!${RESET}"