[ticket/14970] Run stylelint on travis

PHPBB3-14970

travis/check-stylesheet.sh

@@ -0,0 +1,24 @@
+#!/bin/bash
+#
+# This file is part of the phpBB Forum Software package.
+#
+# @copyright (c) phpBB Limited <https://www.phpbb.com>
+# @license GNU General Public License, version 2 (GPL-2.0)
+#
+# For full copyright and license information, please see
+# the docs/CREDITS.txt file.
+#
+set -e
+set -x
+
+DB=$1
+TRAVIS_PHP_VERSION=$2
+NOTESTS=$3
+
+if [ "$NOTESTS" == '1' ]
+then
+	cd phpBB
+	npm install -g
+	npm install
+	stylelint --config ../.stylelintrc "styles/prosilver/theme/*.css"
+fi