git commit hook to remove trailing whitespaces

remove trailing whitespaces

#!/bin/sh
#
# A git hook script to find and fix trailing whitespace
# in your commits. Bypass it with the --no-verify option
# to git-commit
#
# found on http://snipplr.com/view/28523/git-precommit-hook-to-fix-trailing-whitespace/
#
 
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"
done
 
# Now we can commit
exit