pre commit hook to automatically fix code styles and add the changes to the commit

gistfile1.txt

#!/usr/bin/env bash

# Change the directory in which the code style fixes should be executed by changing the WWW_DIR variable
#
# DO NOT USE THIS WITH PARTIAL COMMITS
# If you want to do partial commits, disable hooks by using the "--no-verify" option when commiting
#
# Attention: Not tested with cygwin and linux

set -e

ROOT_DIR="$(git rev-parse --show-toplevel)"
WWW_DIR="$ROOT_DIR/www"

case "$(uname -s)" in
    Linux*)     machine=Linux;;
    Darwin*)    machine=Mac;;
    CYGWIN*)    machine=Cygwin;;
    MINGW*)     machine=MinGw;;
    *)          machine="UNKNOWN:${unameOut}"
esac

if [ -d "$WWW_DIR" ]; then
    cd $WWW_DIR

    if [ -f "phpcs.xml" ]; then
        FILES=$(git diff --cached --name-only --diff-filter=ACMRT | grep 'www' | sed "s/www\///" | grep "\.php" || true)
        if [[ "$FILES" != "" ]]; then
            # fixing errors

            if [ "$machine" == "Mac" ]; then
                (echo $FILES | xargs -P 4 vendor/bin/phpcbf -q > /dev/null) || true
                echo $FILES | xargs -P 4 vendor/bin/phpcs
            else
                (echo $FILES | xargs --max-procs=4 vendor/bin/phpcbf -q > /dev/null) || true
                echo $FILES | xargs --max-procs=4 vendor/bin/phpcs
            fi

            echo $FILES | xargs git add
        fi
    fi
fi;