Build and install script for Fallow under Linux using mkxp

install-fallow.sh

#!/bin/bash
# Install and build dependencies for mkxp for running the game Fallow by Ada Rook.
# Script by Mara Huldra 2021.
# SPDX-License-Identifier: MIT
# Tested on Ubuntu 20.04 and Debian.
set -e
PREFIX="${PWD}/fallow-install"
BUILDDIR="${PWD}/fallow-build"
FALLOWHOME="${HOME}/.steam/debian-installation/steamapps/common/Fallow"
PAR=1

IPRE="\e[95m"
TPRE="\e[37m"
WPRE="\e[91m"
POST="\e[0m"

# Argument parsing
while [[ $# -gt 0 ]]; do
  key="$1"

  case $key in
    -i|--install-prefix)
      PREFIX="$2"
      shift
      shift
      ;;
    -b|--build-dir)
      BUILDDIR="$2"
      shift
      shift
      ;;
    -d|--data-dir)
      FALLOWHOME="$2"
      shift
      shift
      ;;
    -j|--jobs)
      PAR="$2"
      shift
      shift
      ;;
    -h|--help)
      echo "Usage: $0 <...>"
      echo
      echo "-i|--install-prefix <install_prefix> Prefix to install binaries to (default ${PREFIX})."
      echo "-b|--build-dir <build_dir>           Temporary build directory (WILL BE DELETED, default ${BUILDDIR})."
      echo "-d|--data-dir <fallow_home>          Fallow installation directory (default ${FALLOWHOME})."
      echo "-j|--jobs <n>                        Number of build threads (default ${PAR})."
      exit 0
      ;;
    *)    # unknown option
      echo "Invalid argument $key. Valid arguments are: --install-prefix, --build-dir, --data-dir."
      exit 1
      ;;
  esac
done

echo -e "${IPRE}Installing mkxp to ${PREFIX}${POST}"
echo -e "${IPRE}Assuming Fallow is installed in ${FALLOWHOME}${POST}"
echo -e "${IPRE}Using temporary build directory ${BUILDDIR}${POST}"

if [ ! -d "${FALLOWHOME}" ]; then
    echo -e "${WPRE}Cannot find game installation (override with --data-dir).${POST}"
    exit 1
fi

mkdir -p "${PREFIX}"

echo -e "${TPRE}Install apt dependencies...${POST}"
set +e
sudo apt install autoconf automake libtool cmake libogg-dev libboost-program-options-dev libsigc++-2.0-dev libphysfs-dev libsdl2-dev libsdl2-ttf-dev libsdl2-image-dev libsdl2-mixer-dev libopenal-dev libpixman-1-dev
result=$?
set -e
if [ $result != 0 ]; then
    echo -e "${WPRE}Warning: sudo or apt failed, please check that the needed system dependencies have been installed.${POST}"
    # Don't exit here.
fi

rm -rf ${BUILDDIR}
mkdir ${BUILDDIR}

echo -e "${TPRE}Download source dependencies...${POST}"
cd ${BUILDDIR}
wget https://cache.ruby-lang.org/pub/ruby/2.1/ruby-2.1.10.tar.bz2
wget -O config.guess 'https://git.savannah.gnu.org/gitweb/?p=config.git;a=blob_plain;f=config.guess;hb=HEAD'
wget -O config.sub 'https://git.savannah.gnu.org/gitweb/?p=config.git;a=blob_plain;f=config.sub;hb=HEAD'
git clone --depth=1 https://github.com/Ancurio/SDL_sound.git
git clone --depth=1 https://github.com/Ancurio/mkxp.git

echo -e "${TPRE}Building source dependencies${POST}"
export PKG_CONFIG_PATH="${PREFIX}/lib/pkgconfig"

# Build a minimal ruby 2.1 (for compatibility with RPG Maker XP)
cd ${BUILDDIR}
tar -jxf ruby-2.1.10.tar.bz2
cd ruby-2.1.10
# replace config.guess and config.sub, for newer architectures
cp ${BUILDDIR}/config.guess ${BUILDDIR}/config.sub tool
./configure --prefix="${PREFIX}" --with-ext=thread --disable-install-doc --enable-shared --disable-dln --disable-rubygems --with-static-linked-ext
make # do not use parallel build for this ruby, it will non-deterministically fail
make install

# Build Ancurio's SDL_sound fork
cd ${BUILDDIR}/SDL_sound 
./bootstrap
./configure --prefix="${PREFIX}"
make -j ${PAR}
make install

# Build mkxp itself
cd ${BUILDDIR}/mkxp
mkdir build
cd build
cmake .. -DCMAKE_INSTALL_PREFIX:PATH="${PREFIX}" -DCMAKE_BUILD_TYPE=Release
make -j ${PAR}
cp mkxp.bin.* "${PREFIX}/bin/mkxp"

echo -e "${TPRE}Configuring game...${POST}"

# Preloaded game scripts
cat > "${PREFIX}/bin/win32_dummy.rb" << "END"
# mkxp dummy Win32 wrapper for the game Fallow by Ada Rook
class Win32API
  def initialize(*args)
    # Hide OS mouse cursor while over window, the game never uses mouse
    Graphics.show_cursor = false
    # You could set graphics.fullscreen here:
    #   Graphics.fullscreen = true
    # But it is more straightforward to directly set fullscreen=true in mkxp.conf to start full-screen.
    # The full-screen mode can always be toggled with Alt-Enter.
  end
  def call(*args)
  end
end
END

# Create mkxp configuration file 
cat > "${PREFIX}/bin/mkxp.conf" << END
execName=Fallow
rgssVersion=1
fullscreen=true
fixedAspectRatio=true
smoothScaling=true
vsync=true
defScreenW=640
defScreenH=480
anyAltToggleFS=true
enableReset=false
useScriptNames=true
gameFolder=${FALLOWHOME}
preloadScript=${PREFIX}/bin/win32_dummy.rb
END

# Create run script
cat > "${PREFIX}/bin/fallow" << END
#!/bin/bash
set -e
PREFIX="${PREFIX}"

export LD_LIBRARY_PATH="\${PREFIX}/lib"
\${PREFIX}/bin/mkxp
END
chmod +x "${PREFIX}/bin/fallow"

echo -e "${IPRE}Installation successful${POST}"
echo "You can run the game with '${PREFIX}/bin/fallow'"