Simple git pre-commit hook to prevent trailing whitespace from entering the repository.

gistfile1.sh

#!/bin/sh
if ( /usr/bin/grep --quiet --exclude="*.log" --recursive --extended-regexp ' $' * )
then
  echo >&2 "Trailing whitespace errors found in:"
  /usr/bin/grep >&2 --files-with-matches --exclude="*.log" --recursive --extended-regexp ' $' *
  echo >&2 ""
  echo >&2 "Please fix before trying to commit again"
  exit 1
fi