scala-package/scalastyle-config.xml

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<!--
If you wish to turn off checking for a section of code, you can put a comment in the source
before and after the section, with the following syntax:
  // scalastyle:off
  ...  // stuff that breaks the styles
  // scalastyle:on

You can also disable only one rule, by specifying its rule id, as specified in:
  http://www.scalastyle.org/rules-0.7.0.html

  // scalastyle:off println 
  println("I do want to print something here")
  // scalastyle:on println 
-->

<scalastyle>
  <name>Scalastyle standard configuration</name>

  <check level="error" class="org.scalastyle.file.HeaderMatchesChecker" enabled="true">
    <parameters>
      <parameter name="header"><![CDATA[/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */]]></parameter>
    </parameters>
  </check>


  <check level="error" class="org.scalastyle.file.FileTabChecker" enabled="true"></check>

  <check level="error" class="org.scalastyle.scalariform.SpacesAfterPlusChecker" enabled="true"></check>

  <check level="error" class="org.scalastyle.scalariform.SpacesBeforePlusChecker" enabled="true"></check>

  <check level="error" class="org.scalastyle.file.WhitespaceEndOfLineChecker" enabled="true"></check>

  <check level="error" class="org.scalastyle.file.FileLineLengthChecker" enabled="true">
    <parameters>
      <parameter name="maxLineLength"><![CDATA[100]]></parameter>
      <parameter name="tabSize"><![CDATA[2]]></parameter>
      <parameter name="ignoreImports">true</parameter>
    </parameters>
  </check>

  <check level="error" class="org.scalastyle.scalariform.ClassNamesChecker" enabled="true">
    <parameters><parameter name="regex"><![CDATA[[A-Z][A-Za-z]*]]></parameter></parameters>
  </check>

  <check level="error" class="org.scalastyle.scalariform.ObjectNamesChecker" enabled="true">
    <parameters><parameter name="regex"><![CDATA[[A-Z][A-Za-z]*]]></parameter></parameters>
  </check>

  <check level="error" class="org.scalastyle.scalariform.PackageObjectNamesChecker" enabled="true">
    <parameters><parameter name="regex"><![CDATA[^[a-z][A-Za-z]*$]]></parameter></parameters>
  </check>

  <check customId="parameterNum" level="error" class="org.scalastyle.scalariform.ParameterNumberChecker" enabled="true">
    <parameters><parameter name="maxParameters"><![CDATA[10]]></parameter></parameters>
  </check>

  <check customId="finalize" level="error" class="org.scalastyle.scalariform.NoFinalizeChecker" enabled="true">
    <customMessage><![CDATA[Are you sure you want to implement finalize? If yes, wrap the class block with
      // scalastyle:off finalize
      class XXX {
        ...
      }
      // scalastyle:on finalize
    ]]></customMessage>
  </check>

  <check level="error" class="org.scalastyle.scalariform.CovariantEqualsChecker" enabled="true"></check>

  <check level="error" class="org.scalastyle.scalariform.StructuralTypeChecker" enabled="true"></check>

  <check level="error" class="org.scalastyle.scalariform.UppercaseLChecker" enabled="true"></check>

  <check level="error" class="org.scalastyle.scalariform.IfBraceChecker" enabled="true">
    <parameters>
      <parameter name="singleLineAllowed"><![CDATA[true]]></parameter>
      <parameter name="doubleLineAllowed"><![CDATA[true]]></parameter>
    </parameters>
  </check>

  <check customId="havetype" level="error" class="org.scalastyle.scalariform.PublicMethodsHaveTypeChecker" enabled="true"></check>

  <check level="error" class="org.scalastyle.file.NewLineAtEofChecker" enabled="true"></check>

  <check level="error" class="org.scalastyle.scalariform.NonASCIICharacterChecker" enabled="true"></check>

  <check level="error" class="org.scalastyle.scalariform.SpaceAfterCommentStartChecker" enabled="true"></check>

  <check level="error" class="org.scalastyle.scalariform.EnsureSingleSpaceBeforeTokenChecker" enabled="true">
   <parameters>
     <parameter name="tokens">ARROW, EQUALS, ELSE, TRY, CATCH, FINALLY, LARROW, RARROW</parameter>
   </parameters>
  </check>

  <check level="error" class="org.scalastyle.scalariform.EnsureSingleSpaceAfterTokenChecker" enabled="true">
    <parameters>
     <parameter name="tokens">ARROW, EQUALS, COMMA, COLON, IF, ELSE, DO, WHILE, FOR, MATCH, TRY, CATCH, FINALLY, LARROW, RARROW</parameter>
    </parameters>
  </check>

  <!-- We should enable this rule once the code base is stable enough -->
  <check level="error" class="org.scalastyle.scalariform.NotImplementedErrorUsage" enabled="false"></check>

  <!-- all printlns need to be wrapped in '// scalastyle:off/on println' -->
  <check customId="println" level="error" class="org.scalastyle.scalariform.TokenChecker" enabled="true">
    <parameters><parameter name="regex">^println$</parameter></parameters>
    <customMessage><![CDATA[Are you sure you want to println? If yes, wrap the code block with
      // scalastyle:off println
      println(...)
      // scalastyle:on println]]></customMessage>
  </check>

  <check customId="classforname" level="error" class="org.scalastyle.file.RegexChecker" enabled="true">
    <parameters><parameter name="regex">Class\.forName</parameter></parameters>
    <customMessage><![CDATA[
      Are you sure that you want to use Class.forName? In most cases, you should use Utils.classForName instead.
      If you must use Class.forName, wrap the code block with
      // scalastyle:off classforname
      Class.forName(...)
      // scalastyle:on classforname
    ]]></customMessage>
  </check>

  <!-- JavaConversions should be replaced with JavaConverters -->
  <check customId="javaconversions" level="error" class="org.scalastyle.scalariform.TokenChecker" enabled="true">
    <parameters><parameter name="regex">JavaConversions</parameter></parameters>
    <customMessage>Instead of importing implicits in scala.collection.JavaConversions._, import
    scala.collection.JavaConverters._ and use .asScala / .asJava methods</customMessage>
  </check>

  <check level="error" class="org.scalastyle.scalariform.EqualsHashCodeChecker" enabled="true"></check>

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

  <!-- We can use return quite a bit for control flows and guards -->
  <check level="warning" class="org.scalastyle.scalariform.ReturnChecker" enabled="true"></check>
</scalastyle>