wt-notify

#!/bin/sh
# Copyright (C) 2014 Francois Gouget
#
# Displays a notification message to the user.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
name0=`basename "$0"`

error()
{
    echo "$name0:error:" "$@" >&2
}


#
# Command line processing
#

opt_msg=""
usage=""
while [ $# -gt 0 ]
do
    arg="$1"
    shift
    if [ "$arg" = "--help" -o "$arg" = "-h" -o "$arg" = "-?" ]
    then
        usage=0
        break
    elif [ -z "$opt_msg" ]
    then
        opt_msg="$arg"
    else
        error "unknown option '$arg'"
        usage=2
        break
    fi
done

if [ -z "$usage" ]
then
    if [ -z "$opt_msg" ]
    then
        error "you must provide the text of the notification"
        usage=2
    fi
fi

if [ "$usage" = "0" ]
then
    echo "Usage: $name0 [--help] MESSAGE"
    echo

    echo "Displays a notification to the user."
    echo

    echo "Where:"
    echo "  MESSAGE      This is the text of the notification."
    echo "  --help, -h   Shows this help message."
    exit 0
elif [ -n "$usage" ]
then
    error "try '$name0 --help' for more information"
    exit $usage
fi


#
# Display the notification
#

echo "$opt_msg"

if type osascript >/dev/null 2>&1
then
    # This does not work on Snow Leopard and lower :-(
    exec osascript <<EOF
tell application "System Events"
    display notification "$opt_msg"
end tell
EOF

elif type notify-send >/dev/null 2>&1
then
    if [ -z "$DISPLAY" ]
    then
        DISPLAY=":0.0"
        export DISPLAY
    fi
    exec notify-send "$opt_msg"

else
    if [ -z "$DISPLAY" ]
    then
        DISPLAY=":0.0"
        export DISPLAY
    fi
    exec zenity --notification --window-icon info --text "$opt_msg" 2>/dev/null &
fi