#!/bin/bash
# Basic start script for running the launcher 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


LAUNCHER_NAME=@Launcher_APP_BINARY_NAME@
LAUNCHER_DIR="$(dirname "$(readlink -f "$0")")"
echo "Launcher Dir: ${LAUNCHER_DIR}"

# Set up env.
# Pass our custom variables separately so that the launcher can remove them for child processes
export LAUNCHER_LD_LIBRARY_PATH="${LAUNCHER_DIR}/lib@LIB_SUFFIX@"
export LAUNCHER_LD_PRELOAD=""
export LAUNCHER_QT_PLUGIN_PATH="${LAUNCHER_DIR}/plugins"
export LAUNCHER_QT_FONTPATH="${LAUNCHER_DIR}/fonts"

export LD_LIBRARY_PATH="$LAUNCHER_LD_LIBRARY_PATH:$LD_LIBRARY_PATH"
export LD_PRELOAD="$LAUNCHER_LD_PRELOAD:$LD_PRELOAD"
export QT_PLUGIN_PATH="$LAUNCHER_QT_PLUGIN_PATH:$QT_PLUGIN_PATH"
export QT_FONTPATH="$LAUNCHER_QT_FONTPATH:$QT_FONTPATH"

# Detect missing dependencies...
DEPS_LIST=`ldd "${LAUNCHER_DIR}"/plugins/*/*.so 2>/dev/null | grep "not found" | sort -u | awk -vORS=", " '{ print $1 }'`
if [ "x$DEPS_LIST" = "x" ]; then
    # We have all our dependencies. Run the launcher.
    echo "No missing dependencies found."

    # Just to be sure...
    chmod +x "${LAUNCHER_DIR}/bin/${LAUNCHER_NAME}"

    # Run the launcher
    exec -a "${LAUNCHER_DIR}/${LAUNCHER_NAME}" "${LAUNCHER_DIR}/bin/${LAUNCHER_NAME}" -d "${LAUNCHER_DIR}" "$@"

    # Run the launcher in valgrind
    # valgrind --log-file="valgrind.log" --leak-check=full --track-origins=yes "${LAUNCHER_DIR}/bin/${LAUNCHER_NAME}" -d "${LAUNCHER_DIR}" "$@"

    # Run the launcher with callgrind, delay instrumentation
    # valgrind --log-file="valgrind.log" --tool=callgrind --instr-atstart=no "${LAUNCHER_DIR}/bin/${LAUNCHER_NAME}" -d "${LAUNCHER_DIR}" "$@"
    # use callgrind_control -i on/off to profile actions

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

    MESSAGE="Error: The launcher 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 (please apply common sense): $INSTALL_CMD\n"

    printerror "$MESSAGE"
    exit 1
fi
