#!/bin/sh
# Basic start script for running MultiMC with the libs packaged with it.

MMC_DIR="$(dirname "$(readlink -f "$0")")"
cd "${MMC_DIR}"
echo "MultiMC Dir: ${MMC_DIR}"

# Set up env
export LD_LIBRARY_PATH="${MMC_DIR}/bin":$LD_LIBRARY_PATH
export QT_PLUGIN_PATH="${MMC_DIR}/plugins"
export QT_FONTPATH="${MMC_DIR}/fonts"

# Detect missing dependencies...
DEPS_LIST=`ldd "${MMC_DIR}"/plugins/*/*.so | grep "not found" | awk -vORS=", " '{ print $1 }'`
if [ "x$DEPS_LIST" = "x" ]; then
	# We have all our dependencies. Run MultiMC.
	echo "No missing dependencies found."

	# Just to be sure...
	chmod +x "${MMC_DIR}/bin/MultiMC"

	# Run MultiMC
	"${MMC_DIR}/bin/MultiMC" -d "${MMC_DIR}" $@

	# Exit with MultiMC's exit code.
	exit $?
else
	# apt
	if which apt-file >/dev/null; then
		LIBRARIES=`echo "$DEPS_LIST" | grep -oP "[^, ]*"`
		COMMAND_LIBS=`for LIBRARY in $LIBRARIES; do apt-file -l search $LIBRARY; done`
		COMMAND_LIBS=`echo "$COMMAND_LIBS" | awk -vORS=" " '{ print $1 }'`
		INSTALL_CMD="sudo apt-get install $COMMAND_LIBS"
	# pacman
	elif which pkgfile >/dev/null; then
		LIBRARIES=`echo "$DEPS_LIST" | grep -oP "[^, ]*"`
		COMMAND_LIBS=`for LIBRARY in $LIBRARIES; do pkgfile $LIBRARY; done`
		COMMAND_LIBS=`echo "$COMMAND_LIBS" | awk -vORS=" " '{ print $1 }'`
		INSTALL_CMD="sudo pacman -S $COMMAND_LIBS"
	# yum
	elif which yum >/dev/null; then
		LIBRARIES=`echo "$DEPS_LIST" | grep -oP "[^, ]*"`
		COMMAND_LIBS=`for LIBRARY in $LIBRARIES; do yum whatprovides $LIBRARY; done`
		COMMAND_LIBS=`echo "$COMMAND_LIBS" | awk -vORS=" " '{ print $1 }'`
		INSTALL_CMD="sudo yum install $COMMAND_LIBS"
	# zypper
	elif which zypper >/dev/null; then
		LIBRARIES=`echo "$DEPS_LIST" | grep -oP "[^, ]*"`
		COMMAND_LIBS=`for LIBRARY in $LIBRARIES; do zypper wp $LIBRARY; done`
		COMMAND_LIBS=`echo "$COMMAND_LIBS" | awk -vORS=" " '{ print $1 }'`
		INSTALL_CMD="sudo zypper install $COMMAND_LIBS"
	# emerge
	elif which pfl >/dev/null; then
		LIBRARIES=`echo "$DEPS_LIST" | grep -oP "[^, ]*"`
		COMMAND_LIBS=`for LIBRARY in $LIBRARIES; do pfl $LIBRARY; done`
		COMMAND_LIBS=`echo "$COMMAND_LIBS" | awk -vORS=" " '{ print $1 }'`
		INSTALL_CMD="sudo emerge $COMMAND_LIBS"
	fi

	MESSAGE="Error: MultiMC is missing the following libraries that it needs to work correctly:\n\t${DEPS_LIST}\nPlease install them from your distribution's package manager."
	MESSAGE="$MESSAGE\n\nHint: $INSTALL_CMD"

	echo $MESSAGE

	if which zenity >/dev/null; then zenity --error --text="$MESSAGE";
	elif which kdialog >/dev/null; then kdialog --error "$MESSAGE";
	fi

	exit 1
fi