support/hooks/pre-commit

#!/bin/sh
#
# A hook script to verify what is about to be committed.
# Called by "git commit" with no arguments.  The hook exits with
# non-zero status if the files being committed do not conform to
# to the Mesos style.
#
# To enable this hook, do this from the root of the repo:
#
# $ ln -s ../../support/hooks/pre-commit .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

# Redirect output to stderr.
exec 1>&2

# If there are whitespace errors, print the offending file names and fail.
git diff-index --check --cached $against -- || exit 1

# Check Mesos style.
exec git diff --cached --name-only --diff-filter=AM | xargs ./support/mesos-style.py