scalastyle-config.xml

<scalastyle>
    <!-- whitespace checks -->
    <check class="org.scalastyle.file.FileTabChecker" level="warning"/>
    <check class="org.scalastyle.file.WhitespaceEndOfLineChecker" level="warning"/>
    <check class="org.scalastyle.scalariform.NoWhitespaceAfterLeftBracketChecker" level="warning"/>
    <check class="org.scalastyle.scalariform.NoWhitespaceBeforeLeftBracketChecker" level="warning"/>
    <check class="org.scalastyle.scalariform.SpacesAfterPlusChecker" level="warning"/>
    <check class="org.scalastyle.scalariform.SpacesBeforePlusChecker" level="warning"/>

    <!-- naming checks -->
    <check class="org.scalastyle.scalariform.ClassNamesChecker" level="warning"/>
    <check class="org.scalastyle.scalariform.MethodNamesChecker" level="warning"/>
    <check class="org.scalastyle.scalariform.ObjectNamesChecker" level="warning"/>
    <check class="org.scalastyle.scalariform.PackageObjectNamesChecker" level="warning"/>

    <!-- size/complexities checks -->
    <check class="org.scalastyle.file.FileLengthChecker" level="warning"/>
    <check class="org.scalastyle.scalariform.CyclomaticComplexityChecker" level="warning"/>
    <check class="org.scalastyle.scalariform.MethodLengthChecker" level="warning"/>
    <check class="org.scalastyle.scalariform.NumberOfMethodsInTypeChecker" level="warning"/>
    <check class="org.scalastyle.scalariform.NumberOfTypesChecker" level="warning"/>
    <check class="org.scalastyle.scalariform.ParameterNumberChecker" level="warning"/>

    <check class="org.scalastyle.file.FileLineLengthChecker" level="warning">
        <parameters>
            <parameter name="maxLineLength">120</parameter>
        </parameters>
    </check>

    <!-- code smells -->
    <check class="org.scalastyle.scalariform.CovariantEqualsChecker" level="warning"/>
    <check class="org.scalastyle.scalariform.EqualsHashCodeChecker" level="warning"/>
    <check class="org.scalastyle.scalariform.IfBraceChecker" level="warning"/>
    <check class="org.scalastyle.scalariform.MagicNumberChecker" level="warning"/>
    <check class="org.scalastyle.scalariform.NoCloneChecker" level="warning"/>
    <check class="org.scalastyle.scalariform.NoFinalizeChecker" level="warning"/>
    <check class="org.scalastyle.scalariform.NullChecker" level="warning"/>
    <check class="org.scalastyle.scalariform.PublicMethodsHaveTypeChecker" level="warning"/>
    <check class="org.scalastyle.scalariform.ReturnChecker" level="warning"/>
    <check class="org.scalastyle.scalariform.SimplifyBooleanExpressionChecker" level="warning"/>
    <check class="org.scalastyle.scalariform.StructuralTypeChecker" level="warning"/>
    <check class="org.scalastyle.scalariform.UppercaseLChecker" level="warning"/>

    <check customId="javaconversions" level="error" class="org.scalastyle.scalariform.TokenChecker">
        <parameters>
            <parameter name="regex">import.*JavaConversions</parameter>
        </parameters>
        <customMessage>Use JavaConverters instead of JavaConversions</customMessage>
    </check>

    <check class="org.scalastyle.scalariform.IllegalImportsChecker" level="warning">
        <parameters>
            <parameter name="illegalImports"><![CDATA[sun._,java.awt._]]></parameter>
        </parameters>
    </check>

    <check class="org.scalastyle.file.RegexChecker" level="warning">
        <parameters>
            <parameter name="regex"><![CDATA[println]]></parameter>
        </parameters>
        <customMessage>Remove debug println</customMessage>
    </check>
</scalastyle>