pre-commit

#!/bin/sh
	# Copyright 2012 The Go Authors. All rights reserved.
	# Use of this source code is governed by a BSD-style
	# license that can be found in the LICENSE file.
	
	# git gofmt pre-commit hook
	#
	# To use, store as .git/hooks/pre-commit inside your repository and make sure
	# it has execute permissions.
	#
	# This script does not handle file names that contain spaces.
	
	gofiles=$(git diff --cached --name-only --diff-filter=ACM | grep '\.go$')
	[ -z "$gofiles" ] && exit 0
	
	unformatted=$(gofmt -l $gofiles)
	[ -z "$unformatted" ] && exit 0
	
	# Some files are not gofmt'd. Print message and fail.
	
	echo >&2 "Go files must be formatted with gofmt. Please run:"
	for fn in $unformatted; do
		echo >&2 "  gofmt -w $PWD/$fn"
	done
	
	exit 1