bash – Display Non-Zero Return Status in PS1

I found the answer on askubuntu.com. @qeirha mentioned that you have to tell bash that the sequence of characters should not be counted in the prompt's length, and you do that by enclosing it in \[ \]. Based on the example provided, here is one solution:

red=$(tput setaf 1)

reset=$(tput sgr0)

[ "$PS1" = "\\s-\\v\\\$ " ] && PS1='$(exit_code=$?; [[ $exit_code -eq 0 ]] || printf %s \[$red\] $exit_code \[$reset\] " ")$ '

This would sort of do it:

#!/bin/bash
RESULT=0
while IFS= read -r -u3 -d $'\0' file; do
        echo -n "building $file ..."
        ant -f "$file" build &&
           echo "success" ||
           { echo "failure" ; RESULT=1 ; break; }
done 3< <(find path-a path-b path-c  -print0)

echo "result was $RESULT"

Note that it mixes find with a bash loop as showed here.

It does not use $? but instead it directly uses the variable $RESULT.

If everything goes fine $RESULT is 0, else it is 1. The loop breaks as soon as an error is encountered.

It should be hopefully safe against malicious file names (because of the use of -print0).