Bash wrapper script to create an OSX notification when my command completes

notify-done.sh

#!/usr/bin/env bash

## Create an OSX notification when my command completes.
#
# Usage: notify-done.sh <command>
#
# For convenience, use a Bash alias:
#
#   alias n="notify-done.sh "
#
# (The trailing space tells the shell to expand any following aliases, so you
# can use your existing aliases with `n`).

# First, capture the input and give it a descriptive name.
#
cmd="$@"

# Then, execute it, passing in the current environment.
#
env bash -c "$cmd"

# Capture the result so that we can exit transparently (i.e. so that this script
# doesn't "swallow" exit codes that might be important) when the time comes.
#
exit_code=$?

# Compose a notification message.
#
msg="$exit_code: $1 has completed."

# Decide on a notification title.
#
if [[ "$exit_code" == "0" ]]
then
    result=Success
else
    result=Failure
fi

# Display the notification, using the message and title we put together above.
#
# You can see the list of available sounds by opening System Preferences >
# Sounds > Sound Effects.
#
osascript -e "display notification \"$msg\" with title \"$result\" sound name \"Glass\""

# Exit transparently, because using this notification wrapper shouldn't change
# how the wrapped command be haves -- that would be rude.
#
exit $exit_code

For anybody on Linux, you might have notify-send, in which case replace the 'osascript' line with this:

/usr/bin/notify-send -u critical "$result" "$msg"