git-hooks-pre-commit

#!/bin/sh
#
# Hook to verify what modified lua files pass luacheck checks before got committed.
# Called by "git commit" with no arguments.
# To enable this hook, put it to `.git/hooks/pre-commit` and make it executable.

if git rev-parse --verify HEAD >/dev/null 2>&1
then
	against=HEAD
else
	# Initial commit: diff against an empty tree object
	against=$(git hash-object -t tree /dev/null)
fi

# Redirect output to stderr.
exec 1>&2

gitroot=$(git rev-parse --show-toplevel)
modified_index=`git diff --cached --name-only --diff-filter=AM $against | grep '.lua$'`
if test ! -z "$modified_index"
then
	cd $gitroot && luacheck --codes $modified_index || exit 1
fi

exit 0

smart-luacheck.sh

#!/usr/bin/env bash
gitroot=$(git rev-parse --show-toplevel)
modified_index=`git diff --cached --name-only --diff-filter=AM | grep '.lua$'`
modified_not_index=`git diff --name-only --diff-filter=M | grep '.lua$'`
unique_list=$(cat <<EOF | sort | uniq
$modified_index
$modified_not_index
EOF
)
cd $gitroot
test ! -z "unique_list" && luacheck --codes $unique_list