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

function printerror {
	printf "$1"
	if which zenity >/dev/null; then zenity --error --text="$1" &>/dev/null;
	elif which kdialog >/dev/null; then kdialog --error "$1" &>/dev/null;
	fi
}

if [[ $EUID -eq 0 ]]; then
    printerror "This program should not be run using sudo or as the root user!\n"
    exit 1
fi


MMC_DIR="$(dirname "$(readlink -f "$0")")"
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 2>/dev/null | 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}" $@

	# Run MultiMC in valgrind
	# valgrind --log-file="valgrind.log" --leak-check=full --track-origins=yes "${MMC_DIR}/bin/MultiMC" -d "${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\n"

	printerror "$MESSAGE"
	exit 1
fi