Runs php code sniffer via bash script

php_codesniffer_wp.sh

#!/bin/bash

set -e
set -u
set -o pipefail

# installs composer if required
function maybe_install_composer() {

	# If composer exists then return
	if type composer > /dev/null; then
		return
	else
	# install composer
		curl -sS https://getcomposer.org/installer | sudo php -- --install-dir=/usr/local/bin --filename=composer
	fi
	return
}

# installs PHPCS and WPCS via composer
function maybe_install_dependencies {

	# Checking available coding standards.
	if type phpcs > /dev/null; then

		# standards=$(phpcs -i)

		if [[ $(phpcs -i) == *"WordPress"* ]]; then
			return
		fi

	fi

	# install phpcs:
	composer global require "squizlabs/php_codesniffer=${PHPCS_VER}"

	# install wordpress coding standard rulesets:
	composer global require "wp-coding-standards/wpcs=${WPCS_VER}"

	# set phpcs installed path to wp-coding-standards/wpcs.
	phpcs --config-set installed_paths $HOME/.composer/vendor/wp-coding-standards/wpcs

	return
}

function php_code_sniff() {

	if [ -z ${PHP_STANDARD+x} ]; then
		PHP_STANDARD='WordPress'
	fi

	#Enable php-codesniffing only if there are php modified files.
	phpfiles=$(git diff --name-only master | grep .php);

	if [ ! -z "$phpfiles" ]; then

		maybe_install_composer

		maybe_install_dependencies

		# do sniffing
		phpcs --standard=${PHP_STANDARD} --extensions=php -p -n -s --colors $phpfiles
	else
		exit 0
	fi
}

php_code_sniff