pre-commit

#!/bin/sh

###
# Strip whitespaces and convert to Unix newlines.
# Source: http://stackoverflow.com/a/3516525/86294
# Save this file into git config directory as .git/hooks/pre-commit
###
if git-rev-parse --verify HEAD >/dev/null 2>&1 ; then
    against=HEAD
else
    # Initial commit: diff against an empty tree object
    against=4b825dc642cb6eb9a060e54bf8d69288fbee4904
fi
# Find files with trailing whitespace
for FILE in $(exec git diff-index --check --cached $against -- | sed '/^[+-]/d'\
        | sed -r 's/:[0-9]+:.*//' | uniq) ; do
    # Fix them!
    sed -i 's/[[:space:]]*$//' "$FILE"
    fromdos $FILE
    git add $FILE
done