Issue #2573377 by pfrenssen, attiks: Add our own phpcs.xml file

<?xml version="1.0" encoding="UTF-8"?>

<ruleset name="drupal_core">

  <description>Default PHP CodeSniffer configuration for Drupal core.</description>

  <file>.</file>

  <arg name="extensions" value="inc,info,install,module,php,profile,test,theme"/>

  <!--Exclude third party code.-->

  <exclude-pattern>./assets/vendor/*</exclude-pattern>

  <exclude-pattern>./vendor/*</exclude-pattern>

  <!--Exclude test files that are intentionally empty, or intentionally violate coding standards.-->

  <exclude-pattern>./modules/system/tests/fixtures/HtaccessTest</exclude-pattern>

  <!--Todo: remove this file. Ref. https://www.drupal.org/node/2575419-->

  <exclude-pattern>./lib/Drupal/Core/Cache/Context/OriginalRequestCacheContext.php</exclude-pattern>

  <!--Blacklist of coding standard rules that are not yet fixed. Ref. https://www.drupal.org/node/2571965-->

  <rule ref="Drupal">

    <exclude name="Drupal.Array.Array"/>

    <exclude name="Drupal.Classes.ClassCreateInstance"/>

    <exclude name="Drupal.Classes.ClassDeclaration"/>

    <exclude name="Drupal.Classes.InterfaceName"/>

    <exclude name="Drupal.Commenting.ClassComment"/>

    <exclude name="Drupal.Commenting.DocComment"/>

    <exclude name="Drupal.Commenting.DocCommentStar"/>

    <exclude name="Drupal.Commenting.FileComment"/>

    <exclude name="Drupal.Commenting.FunctionComment"/>

    <exclude name="Drupal.Commenting.HookComment"/>

    <exclude name="Drupal.Commenting.InlineComment"/>

    <exclude name="Drupal.ControlStructures.ControlSignature"/>

    <exclude name="Drupal.ControlStructures.ElseIf"/>

    <exclude name="Drupal.ControlStructures.InlineControlStructure"/>

    <exclude name="Drupal.Files.EndFileNewline"/>

    <exclude name="Drupal.Files.LineLength"/>

    <exclude name="Drupal.Formatting.MultiLineAssignment"/>

    <exclude name="Drupal.Formatting.SpaceInlineIf"/>

    <exclude name="Drupal.Formatting.SpaceUnaryOperator"/>

    <exclude name="Drupal.Functions.FunctionDeclaration"/>

    <exclude name="Drupal.NamingConventions.ValidClassName"/>

    <exclude name="Drupal.NamingConventions.ValidFunctionName"/>

    <exclude name="Drupal.NamingConventions.ValidGlobal"/>

    <exclude name="Drupal.NamingConventions.ValidVariableName"/>

    <exclude name="Drupal.Semantics.ConstantName"/>

    <exclude name="Drupal.Semantics.FunctionAlias"/>

    <exclude name="Drupal.Semantics.FunctionT"/>

    <exclude name="Drupal.Semantics.RemoteAddress"/>

    <exclude name="Drupal.Strings.UnnecessaryStringConcat"/>

    <exclude name="Drupal.WhiteSpace.CloseBracketSpacing"/>

    <exclude name="Drupal.WhiteSpace.Comma"/>

    <exclude name="Drupal.WhiteSpace.EmptyLines"/>

    <exclude name="Drupal.WhiteSpace.OpenBracketSpacing"/>

    <exclude name="Drupal.WhiteSpace.OperatorSpacing"/>

    <exclude name="Drupal.WhiteSpace.ScopeClosingBrace"/>

    <exclude name="Drupal.WhiteSpace.ScopeIndent"/>

    <exclude name="Generic.Formatting.SpaceAfterCast"/>

    <exclude name="Generic.Functions.FunctionCallArgumentSpacing"/>

    <exclude name="Generic.Functions.OpeningFunctionBraceKernighanRitchie"/>

    <exclude name="Generic.NamingConventions.ConstructorName"/>

    <exclude name="Generic.PHP.UpperCaseConstant"/>

    <exclude name="Internal.NoCodeFound"/>

    <exclude name="PEAR.Functions.FunctionCallSignature"/>

    <exclude name="PEAR.Functions.ValidDefaultValue"/>

    <exclude name="PSR2.Classes.PropertyDeclaration"/>

    <exclude name="Squiz.Arrays.ArrayBracketSpacing"/>

    <exclude name="Squiz.Arrays.ArrayDeclaration"/>

    <exclude name="Squiz.Classes.LowercaseClassKeywords"/>

    <exclude name="Squiz.Commenting.DocCommentAlignment"/>

    <exclude name="Squiz.Commenting.PostStatementComment"/>

    <exclude name="Squiz.ControlStructures.ForEachLoopDeclaration"/>

    <exclude name="Squiz.ControlStructures.ForLoopDeclaration"/>

    <exclude name="Squiz.ControlStructures.SwitchDeclaration"/>

    <exclude name="Squiz.Functions.FunctionDeclarationArgumentSpacing"/>

    <exclude name="Squiz.PHP.LowercasePHPFunctions"/>

    <exclude name="Squiz.PHP.NonExecutableCode"/>

    <exclude name="Squiz.Scope.MethodScope"/>

    <exclude name="Squiz.Strings.ConcatenationSpacing"/>

    <exclude name="Squiz.WhiteSpace.LanguageConstructSpacing"/>

    <exclude name="Squiz.WhiteSpace.SemicolonSpacing"/>

    <exclude name="Squiz.WhiteSpace.SuperfluousWhitespace"/>

  </rule>

</ruleset>