pre-commit hook to check source code syntax PHP, Coffee, Sass

pre-commit

#!/bin/bash

checkPHP=1
checkCoffee=1
checkSass=1

PHP=`which php`
COFFEE=`which coffee`
SASS=`which sass`

# Check conflicts
isConflicts=`git diff --cached --name-only -S'<<<<<< HEAD'`
if [ -n "$isConflicts" ]; then
    echo "Unresolved merge conflicts in this commit:"
    echo $isConflicts
fi

# Check PHP syntax
if [ $checkPHP -eq 1 ]; then
    for i in `git diff --cached --name-only | grep '\.php$'`; do
        if [ -e $i ]; then
            phperror=`$PHP -l "$i" | grep -v 'No syntax errors detected in'`
            if [ -n "$phperror" ]; then
                echo "PHP errors added in file: " $i
                isPHPError='true'
            fi
        fi
    done
fi

# Check CoffeeScript syntax
if [ $checkCoffee -eq 1 ]; then
    for i in `git diff --cached --name-only | grep '\.coffee$'`; do
        if [ -e $i ]; then
            coffeeerror=`$COFFEE "$i"`
            if [ $? -ne 0 ]; then
                isCoffeeError='true'
            fi
        fi
    done
fi

# Check SASS syntax
if [ $checkSass -eq 1 ]; then
    for i in `git diff --cached --name-only | grep '\.sass$'`; do
        if [ -e $i ]; then
            sasserror=`$SASS -c "$i"`
            if [ $? -ne 0 ]; then
                isSassError='true'
            fi
        fi
    done
fi

isError="$isConflicts$isPHPError$isCoffeeError$isSassError"

###########
if [[ -n $isError ]]; then
    echo
    echo "Commit with '-n' to bypass checks"
    exit 1
fi