Git pre-commit Hook

pre-commit

#!/bin/bash
#
# Language agnostic GIT pre commit hook.
#
# Copyright (c) 2013 Marius Wilms.
# All rights reserved.
#
# Distributed under the terms of the BSD 3-clause license. Redistributions
# of this file must retain the above copyright notice. For the full license
# text see: http://opensource.org/licenses/BSD-3-Clause.
#
# Detection for non-ASCII characters based upon
# https://gist.github.com/2587900 by Brent Sowers.
#
EXIT=0

JS_LINTER=""
which jshint > /dev/null
if [[ $? != 0 ]]; then
	JS_LINTER="jshint"
fi
which eslint > /dev/null
if [[ $? != 0 ]]; then
	JS_LINTER="eslint"
fi
if [[ $JS_LIKNTER == "" ]]; then
	ENABLE_LINT_JS="n"
else 
	ENABLE_LINT_JS="y"
fi
which msgfmt > /dev/null
if [[ $? != 0 ]]; then
	ENABLE_LINT_PO="n"
else 
	ENABLE_LINT_PO="y"
fi

echo "Pre-commit hook started."
echo

# Determine current revision
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
FILES=$(git diff-index --cached --name-only --diff-filter=AM ${AGAINST})
NUMFILES=$(echo $FILES | grep -o ' ' | wc -l  | awk '{print $1}')

if [[ $NUMFILES -gt 30 ]]; then
	echo "Too many files ($NUMFILES) to check. Try --no-verify"
	exit 1
fi

echo "Checking $NUMFILES files..."
for FILE in $FILES; do
	if [ ! -f $FILE ]; then
		# Do not check directories.
		continue
	fi
	echo "------------------------------------------------------------"
	echo "Checking: ${FILE}"

	# Non-ASCII characters
	# OUT=$(cat $FILE | tr -d "\000-\011\013-\177" | tr -d '\n')
	# if [ -n "$OUT" ]; then
	# 	for ((I=0; I < ${#OUT}; I++)); do
	# 		CHAR=${OUT:$I:1}
	# 		echo "Non-ASCII characters \`$CHAR\` found:"
	# 		git diff HEAD -S$CHAR -- $FILE
	# 	done
	# 	EXIT=1
	# fi
	
	grep -E '^#!.*bash' $FILE > /dev/null
	ISNT_BASH=$?

	# Syntax check
	if [ $(echo $FILE | grep -E '\.(php|ctp)$') ]; then
		DEBUG=$(grep --line-number -E '(var_dump\|die\(|die;)' $FILE)
		if [[ $? == 0 ]]; then
			echo "Found debug code!"
			echo $DEBUG
			EXIT=1
		fi
		# PHP, CakePHP Templates
		php -l $FILE 2>/dev/null
	elif [ $(echo $FILE | grep -E '\.(js)$') ]; then
		DEBUG=$(grep --line-number -E 'console\.(debug|log)\(' $FILE)
		if [[ $? == 0 ]]; then
			echo "Found debug code!"
			echo $DEBUG
			EXIT=1
		fi

		# JavaScript
		if [[ $ENABLE_LINT_JS == "y" ]]; then
			$JS_LINTER $FILE 2>&1
		fi
	elif [ $ISNT_BASH = 0 ]; then
		# BASH
		bash -n $FILE
	elif [ $(echo $FILE | grep -E '\.po$') ]; then
		# GNU Gettext
		# POT files wont pass validation as they often contain
		# fuzzy headers. So we only check PO files here.
		if [[ $ENABLE_LINT_PO == "y" ]]; then
			msgfmt -c $FILE
		fi
	fi
	if [ $? != 0 ]; then
		EXIT=1
	fi
done
echo

echo "============================================================"
if [ $EXIT != 0 ]; then
	echo "Pre-commit hook failed."
	echo
	echo "Fix the issues detected above then try to commit your"
	echo "changes again. You can prevent the hook from running"
	echo "by using the \`--no-verify\` option with \`git commit\`."
else
	echo "Pre-commit hook succeeded."
fi
echo

exit $EXIT