ruleset.xml

<?xml version="1.0"?>
<ruleset name="Joomla-CMS">
    <description>The Joomla CMS PSR-12 exceptions.</description>

    <!-- Exclude folders not containing production code -->

    <!-- Exclude 3rd party libraries and Framework code. -->
    <exclude-pattern type="relative">src/administrator/components/com_migratetojoomla/tmpl/*</exclude-pattern>

    <rule ref="PSR12" />

    <!-- temporary extend the line length -->
    <rule ref="Generic.Files.LineLength">
        <properties>
            <property name="lineLimit" value="560"/>
            <property name="absoluteLineLimit" value="560"/>
        </properties>
    </rule>

    <rule ref="PSR1.Classes.ClassDeclaration">
    </rule>

    <rule ref="PSR2.Classes.PropertyDeclaration.Underscore">
    </rule>

    <rule ref="PSR1.Methods.CamelCapsMethodName.NotCamelCaps">
    </rule>

    <rule ref="PSR2.Methods.MethodDeclaration.Underscore">
    </rule>

    <rule ref="Squiz.Classes.ValidClassName">
    </rule>
</ruleset>