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scalastyle_config.xml
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scalastyle_config.xml
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<scalastyle>
<name>Scalastyle standard configuration</name>
<!-- ================================================================================ -->
<!-- Enabled rules -->
<!-- ================================================================================ -->
<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[(config|[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="argcount" level="error" class="org.scalastyle.scalariform.ParameterNumberChecker" enabled="true">
<parameters><parameter name="maxParameters"><![CDATA[24]]></parameter></parameters>
</check>
<check level="error" class="org.scalastyle.scalariform.NoFinalizeChecker" enabled="true"></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 level="error" class="org.scalastyle.scalariform.PublicMethodsHaveTypeChecker" enabled="true"></check>
<check level="error" class="org.scalastyle.file.NewLineAtEofChecker" enabled="true"></check>
<check customId="nonascii" 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>
<check level="error" class="org.scalastyle.scalariform.NotImplementedErrorUsage" enabled="true"></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="visiblefortesting" level="error" class="org.scalastyle.file.RegexChecker" enabled="true">
<parameters><parameter name="regex">@VisibleForTesting</parameter></parameters>
<customMessage><![CDATA[
@VisibleForTesting causes classpath issues. Please note this in the java doc instead.
]]></customMessage>
</check>
<check customId="runtimeaddshutdownhook" level="error" class="org.scalastyle.file.RegexChecker" enabled="true">
<parameters><parameter name="regex">Runtime\.getRuntime\.addShutdownHook</parameter></parameters>
<customMessage><![CDATA[
Are you sure that you want to use Runtime.getRuntime.addShutdownHook? In most cases, you should use
ShutdownHookManager.addShutdownHook instead.
If you must use Runtime.getRuntime.addShutdownHook, wrap the code block with
// scalastyle:off runtimeaddshutdownhook
Runtime.getRuntime.addShutdownHook(...)
// scalastyle:on runtimeaddshutdownhook
]]></customMessage>
</check>
<check customId="mutablesynchronizedbuffer" level="error" class="org.scalastyle.file.RegexChecker" enabled="true">
<parameters><parameter name="regex">mutable\.SynchronizedBuffer</parameter></parameters>
<customMessage><![CDATA[
Are you sure that you want to use mutable.SynchronizedBuffer? In most cases, you should use
java.util.concurrent.ConcurrentLinkedQueue instead.
If you must use mutable.SynchronizedBuffer, wrap the code block with
// scalastyle:off mutablesynchronizedbuffer
mutable.SynchronizedBuffer[...]
// scalastyle:on mutablesynchronizedbuffer
]]></customMessage>
</check>
<check customId="caselocale" level="error" class="org.scalastyle.file.RegexChecker" enabled="true">
<parameters><parameter name="regex">(\.toUpperCase|\.toLowerCase)(?!(\(|\(Locale.ROOT\)))</parameter></parameters>
<customMessage><![CDATA[
Are you sure that you want to use toUpperCase or toLowerCase without the root locale? In most cases, you
should use toUpperCase(Locale.ROOT) or toLowerCase(Locale.ROOT) instead.
If you must use toUpperCase or toLowerCase without the root locale, wrap the code block with
// scalastyle:off caselocale
.toUpperCase
.toLowerCase
// scalastyle:on caselocale
]]></customMessage>
</check>
<check customId="throwerror" level="error" class="org.scalastyle.file.RegexChecker" enabled="true">
<parameters><parameter name="regex">throw new \w+Error\(</parameter></parameters>
<customMessage><![CDATA[
Are you sure that you want to throw Error? In most cases, you should use appropriate Exception instead.
If you must throw Error, wrap the code block with
// scalastyle:off throwerror
throw new XXXError(...)
// scalastyle:on throwerror
]]></customMessage>
</check>
<!-- JavaConversions should be replaced with JavaConverters -->
<check customId="javaconversions" level="error" class="org.scalastyle.scalariform.TokenChecker" enabled="true">
<parameters><parameter name="regex">JavaConversions</parameter></parameters>
<customMessage>Instead of importing implicits in scala.collection.JavaConversions._, import
scala.collection.JavaConverters._ and use .asScala / .asJava methods</customMessage>
</check>
<check customId="commonslang2" level="error" class="org.scalastyle.file.RegexChecker" enabled="true">
<parameters><parameter name="regex">org\.apache\.commons\.lang\.</parameter></parameters>
<customMessage>Use Commons Lang 3 classes (package org.apache.commons.lang3.*) instead
of Commons Lang 2 (package org.apache.commons.lang.*)</customMessage>
</check>
<check customId="extractopt" level="error" class="org.scalastyle.scalariform.TokenChecker" enabled="true">
<parameters><parameter name="regex">extractOpt</parameter></parameters>
<customMessage>Use jsonOption(x).map(.extract[T]) instead of .extractOpt[T], as the latter
is slower. </customMessage>
</check>
<check level="error" class="org.scalastyle.scalariform.DisallowSpaceBeforeTokenChecker" enabled="true">
<parameters>
<parameter name="tokens">COMMA</parameter>
</parameters>
</check>
<!-- Single Space between ')' and '{' -->
<check customId="SingleSpaceBetweenRParenAndLCurlyBrace" level="error" class="org.scalastyle.file.RegexChecker" enabled="true">
<parameters><parameter name="regex">\)\{</parameter></parameters>
<customMessage><![CDATA[
Single Space between ')' and `{`.
]]></customMessage>
</check>
<check customId="NoScalaDoc" level="error" class="org.scalastyle.file.RegexChecker" enabled="true">
<parameters><parameter name="regex">(?m)^(\s*)/[*][*].*$(\r|)\n^\1 [*]</parameter></parameters>
<customMessage>Use Javadoc style indentation for multiline comments</customMessage>
</check>
<check customId="OmitBracesInCase" level="error" class="org.scalastyle.file.RegexChecker" enabled="true">
<parameters><parameter name="regex">case[^\n>]*=>\s*\{</parameter></parameters>
<customMessage>Omit braces in case clauses.</customMessage>
</check>
<!-- Avoid Java annotations -->
<check level="error" class="org.scalastyle.scalariform.OverrideJavaChecker" enabled="true"></check>
<check level="error" class="org.scalastyle.scalariform.DeprecatedJavaChecker" enabled="true"></check>
<!-- ================================================================================ -->
<!-- Rules we'd like to enforce, but haven't cleaned up the codebase yet -->
<!-- ================================================================================ -->
<!-- We cannot turn the following two on, because it'd fail a lot of string interpolation use cases. -->
<!-- Ideally the following two rules should be configurable to rule out string interpolation. -->
<check level="error" class="org.scalastyle.scalariform.NoWhitespaceBeforeLeftBracketChecker" enabled="false"></check>
<check level="error" class="org.scalastyle.scalariform.NoWhitespaceAfterLeftBracketChecker" enabled="false"></check>
<!-- This breaks symbolic method names so we don't turn it on. -->
<!-- Maybe we should update it to allow basic symbolic names, and then we are good to go. -->
<check level="error" class="org.scalastyle.scalariform.MethodNamesChecker" enabled="false">
<parameters>
<parameter name="regex"><![CDATA[^[a-z][A-Za-z0-9]*$]]></parameter>
</parameters>
</check>
<!-- Should turn this on, but we have a few places that need to be fixed first -->
<check level="error" class="org.scalastyle.scalariform.EqualsHashCodeChecker" enabled="true"></check>
<!-- ================================================================================ -->
<!-- Disabled rules -->
<!-- ================================================================================ -->
<check level="error" class="org.scalastyle.scalariform.IllegalImportsChecker" enabled="false">
<parameters><parameter name="illegalImports"><![CDATA[sun._,java.awt._]]></parameter></parameters>
</check>
<!-- We want the opposite of this: NewLineAtEofChecker -->
<check level="error" class="org.scalastyle.file.NoNewLineAtEofChecker" enabled="false"></check>
<!-- This one complains about all kinds of random things. Disable. -->
<check level="error" class="org.scalastyle.scalariform.SimplifyBooleanExpressionChecker" enabled="false"></check>
<!-- We use return quite a bit for control flows and guards -->
<check level="error" class="org.scalastyle.scalariform.ReturnChecker" enabled="false"></check>
<!-- We use null a lot in low level code and to interface with 3rd party code -->
<check level="error" class="org.scalastyle.scalariform.NullChecker" enabled="false"></check>
<check level="error" class="org.scalastyle.scalariform.NoCloneChecker" enabled="false"></check>
<check level="error" class="org.scalastyle.file.FileLengthChecker" enabled="false">
<parameters><parameter name="maxFileLength">800></parameter></parameters>
</check>
<check level="error" class="org.scalastyle.scalariform.NumberOfTypesChecker" enabled="false">
<parameters><parameter name="maxTypes">30</parameter></parameters>
</check>
<check level="error" class="org.scalastyle.scalariform.CyclomaticComplexityChecker" enabled="false">
<parameters><parameter name="maximum">10</parameter></parameters>
</check>
<check level="error" class="org.scalastyle.scalariform.MethodLengthChecker" enabled="false">
<parameters><parameter name="maxLength">50</parameter></parameters>
</check>
<!-- Not exactly feasible to enforce this right now. -->
<!-- It is also infrequent that somebody introduces a new class with a lot of methods. -->
<check level="error" class="org.scalastyle.scalariform.NumberOfMethodsInTypeChecker" enabled="false">
<parameters><parameter name="maxMethods"><![CDATA[30]]></parameter></parameters>
</check>
<!-- Doesn't seem super big deal here, and we have a lot of magic numbers ... -->
<check level="error" class="org.scalastyle.scalariform.MagicNumberChecker" enabled="false">
<parameters><parameter name="ignore">-1,0,1,2,3</parameter></parameters>
</check>
</scalastyle>