A naive implentation of a pre commit jslinting hook

precommit.sh

#!/bin/sh
# A naive implentation of a pre commit jslinting hook
# First: checking if jshint is installed
retval=`jshint ; echo $?`
if [[ retval -ne 0 ]]
  then
		echo "You have to install JSHINT for this to work"
		echo "npm install -g jshint"
		exit 1
fi

# the actual hook

JS_FILES=`git diff --name-only --cached | grep -E '\.(js)'`
for file in $JS_FILES
do
	if [[ -f $file ]]
		then
		echo "linting: $file"
		jshint $file
		if [[ $? -ne 0 ]]
			then
				echo "ERROR: with linting $file"
				bad_linting=1
			else
				echo "OK: $file passes linting"
		fi
	fi
done

if [[ $bad_linting -eq 1 ]] #if some file went wrong
	then
		echo "FAIL commiting! linting Errors"
		exit 1
	else
		echo "everything OK - moving to commit"
fi