#!/bin/bash

# A script to indicate a nonzero return code from a command by
# changing the next prompt.  If a command sneakily fails without
# providing any indication other than its return code, your prompt
# changes to let you know, for example:
#
#   joe@acomputer$ true | false | true
#   joe@acomputer Ouch! 0 1 0 $ 
#
# For use with the bash variable PROMPT_COMMAND, e.g. in .bashrc:
#   set -o pipefail
#   PROMPT_COMMAND='eval $(/usr/local/bin/setprompt ${PIPESTATUS[@]})'

RETCODE="$*" && history -a

if [ "$RETCODE" = "0" ]
then
   SQUEAL=""
elif [[ "$RETCODE" == *[1-9]* ]]
then
   SQUEAL=" Ouch! $RETCODE "
fi

echo "PS1='\\u@\\h$SQUEAL\\$ '"