libinput-gestures-setup

#!/bin/bash
# User setup script.
# (C) Mark Blakeney, Aug 2016.

PROG="$(basename $0)"
NAME=${PROG%-*}

BINDIR="/usr/bin"
APPDIR="/usr/share/applications"
ICOBAS="/usr/share/icons/hicolor"
ICODIR="$ICOBAS/128x128/apps"
OCODIR="/usr/share/pixmaps"
DOCDIR="/usr/share/doc/$NAME"
CNFDIR="/etc"
HCFDIR="${XDG_CONFIG_HOME:-$HOME/.config}"
AUTDIR="$HCFDIR/autostart"

usage() {
    echo "Usage:"
    echo "As root: sudo $PROG install|uninstall"
    echo "As user: $PROG start|stop|restart|autostart|autostop|status"
    echo
    echo "-d <dir> (option sets DESTDIR for install/uninstall)"
    echo "-r (force allow root to perform user commands. PLEASE AVOID USING THIS!)"
    exit 1
}

# Process command line options
DESTDIR=""
FORCEROOT=0
while getopts d:r c; do
    case $c in
    d) DESTDIR="$OPTARG";;
    r) FORCEROOT=1;;
    \?) usage;;
    esac
done

shift $((OPTIND - 1))

if [[ $# -ne 1 ]]; then
    usage
fi

cmd="$1"

# Launch given desktop app. First work out most suitable launcher.
# Pretty crude at present but should work for at least GNOME and KDE.
launch() {
    local app="$1"
    local fullpath="$APPDIR/$app.desktop"
    local binpath="$APPBIN/$app"

    # All the commands we will potentially try ..
    local cmds=(
	"kde kioclient5 exec $fullpath"
	"kde kioclient exec $fullpath"
	"all gtk-launch $app"
	"all i3-msg exec $binpath"
	"all exo-open $fullpath"
	"all dex $fullpath"
    )

    local cmdline
    for cmdline in "${cmds[@]}" ; do
	IFS=' ' read de cmd args <<< "$cmdline"

        # Skip if the command does not exist
	if ! hash $cmd &>/dev/null; then
	    continue
	fi

	# Only try KDE commands on KDE
	if ! echo $XDG_CURRENT_DESKTOP | grep -q KDE; then
	    if [[ $de == kde ]]; then
		continue
	    fi
	fi

	# Execute this command
	$cmd $args &>/dev/null
	return $?
    done

    echo "Don't know how to invoke $app.desktop" >&2
    return 1
}

# Set up desktop entry link for auto start of app, if it doesn't already
# exist
auto_start() {
    if [[ ! -f $APPDIR/$NAME.desktop ]]; then
	if [[ -e $AUTDIR/$NAME.desktop ]]; then
	    echo "Removed old $AUTDIR/$NAME.desktop"
	    rm -f $AUTDIR/$NAME.desktop
	fi
	return 1
    fi

    if ! cmp -s $APPDIR/$NAME.desktop $AUTDIR/$NAME.desktop; then
	if mkdir -p $AUTDIR && cp $APPDIR/$NAME.desktop $AUTDIR; then
	    echo "installed or updated $AUTDIR/$NAME.desktop"
	fi
    fi
    return 0
}

# Action given user command
user_action() {
    local cmd=$1

    if [[ $cmd == start ]]; then
	if [[ ! -f $APPDIR/$NAME.desktop ]]; then
	    echo "$NAME is not installed."
	    exit 1
	fi
	if launch "$NAME"; then
	    echo "$NAME started."
	fi
    elif [[ $cmd == stop ]]; then
	for prog in libinput-debug-events $NAME; do
	    if pkill -u $USER -f "$prog\$|$prog " &>/dev/null; then
		echo "$prog stopped."
	    fi
	done
    elif [[ $cmd == autostart ]]; then
	if ! auto_start; then
	    echo "$NAME is not installed."
	    exit 1
	fi
    elif [[ $cmd == autostop ]]; then
	rm -fv $AUTDIR/$NAME.desktop
    elif [[ $cmd == status ]]; then
	if [[ -f $APPDIR/$NAME.desktop ]]; then
	    echo "$NAME is installed."
	else
	    echo "$NAME is not installed."
	fi
	if [[ -f $AUTDIR/$NAME.desktop ]]; then
	    echo "$NAME is set to autostart."
	else
	    echo "$NAME is not set to autostart."
	fi
	if pgrep -u $USER -f "$NAME\$|$NAME " &>/dev/null; then
	    echo "$NAME is running."
	else
	    echo "$NAME is not running."
	fi
	if [[ -f $HCFDIR/$NAME.conf ]]; then
	    echo "$NAME is using custom configuration."
	else
	    echo "$NAME is using default configuration."
	fi
    else
	usage
    fi
}

if [[ $cmd == install || $cmd == uninstall ]]; then
    DESTDIR="${DESTDIR%%+(/)}"
    if [[ -z $DESTDIR && $(id -un) != root ]]; then
	echo "Install or uninstall must be run as sudo/root."
	exit 1
    fi

    # Remove any old files from earlier versions of program
    rm -f $DESTDIR$OCODIR/$NAME.png
    rm -f $DESTDIR$ICODIR/$NAME.png

    if [[ $cmd == install ]]; then
	install -CDv -m 755 -t $DESTDIR$BINDIR $NAME-setup
	install -CDv -m 755 -t $DESTDIR$BINDIR $NAME
	install -CDv -m 644 -t $DESTDIR$APPDIR $NAME.desktop
	install -CDv -m 644 -t $DESTDIR$ICODIR $NAME.svg
	install -CDv -m 644 -t $DESTDIR$CNFDIR $NAME.conf
	install -CDv -m 644 -t $DESTDIR$DOCDIR README.md
    else
	rm -rfv $DESTDIR$BINDIR/$NAME
	rm -rfv $DESTDIR$APPDIR/$NAME.desktop
	rm -rfv $DESTDIR$ICODIR/$NAME.svg
	rm -rfv $DESTDIR$CNFDIR/$NAME.conf
	rm -rfv $DESTDIR$DOCDIR
	rm -rfv $DESTDIR$BINDIR/$NAME-setup
    fi

    if [[ -z $DESTDIR ]]; then
	if [[ -x /usr/bin/update-desktop-database ]]; then
	    /usr/bin/update-desktop-database -q
	fi
	if [[ -x /usr/bin/gtk-update-icon-cache ]]; then
	    /usr/bin/gtk-update-icon-cache $ICOBAS
	fi
    fi
else
    if [[ $(id -un) == root && $FORCEROOT == 0 ]]; then
	echo "Non-installation commands must be run as your own user."
	exit 1
    fi

    # Remove any old configuration from earlier versions of program
    rm -fv ~/bin/$NAME 2>/dev/null
    rm -fv ~/.local/bin/$NAME 2>/dev/null
    rm -fv ~/.local/share/applications/$NAME.desktop 2>/dev/null
    rm -fv ~/.local/share/icons/$NAME.png 2>/dev/null

    # Look for and update any autostart file if it is a link or not
    # pointing to the latest desktop entry. Apparently user autostart
    # files should not be symlinks to system dir files.
    if [[ -e $AUTDIR/$NAME.desktop ]]; then
	if [[ -L $AUTDIR/$NAME.desktop ]]; then
	    echo "Removed old $AUTDIR/$NAME.desktop link"
	    rm -f $AUTDIR/$NAME.desktop
	fi
	auto_start
    fi

    if [[ $cmd == restart ]]; then
	user_action "stop"
	user_action "start"
    else
	user_action $cmd
    fi
fi

exit 0