pmd/rules.xml

<?xml version="1.0"?>
<ruleset name="buck"
    xmlns="http://pmd.sf.net/ruleset/1.0.0"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://pmd.sf.net/ruleset/1.0.0 http://pmd.sf.net/ruleset_xml_schema.xsd"
    xsi:noNamespaceSchemaLocation="http://pmd.sf.net/ruleset_xml_schema.xsd">
  <description>Rules for the Buck project.</description>

  <!--
  Visit https://github.com/pmd/pmd/tree/master/pmd-java/src/main/resources/rulesets/java
  for ruleset definitions. Note that Buck is currently built with PMD 5.0.3.
  -->

  <rule ref="rulesets/java/basic.xml" />
  <rule ref="rulesets/java/empty.xml" />

  <rule ref="rulesets/java/imports.xml">
    <!--
      Excluded because tests that use both JUnit and EasyMock tend to
      statically import many methods, which we allow.
    -->
    <exclude name="TooManyStaticImports" />
  </rule>

  <rule ref="rulesets/java/coupling.xml/LooseCoupling" />

  <rule ref="rulesets/java/junit.xml">
    <!-- This is not practical. -->
    <exclude name="JUnitAssertionsShouldIncludeMessage" />

    <!-- Unclear what an appropriate upper bound would be. -->
    <exclude name="JUnitTestContainsTooManyAsserts" />

    <!--
      Not practical: pure EasyMock tests or tests that exclusively assert
      using MoreAsserts.* should not need to be annotated with this.
    -->
    <exclude name="JUnitTestsShouldIncludeAssert" />
  </rule>

  <rule ref="rulesets/java/unusedcode.xml">
    <!--
      Including the public keyword in interface methods is acceptable: this
      makes it easier to copy/paste them.
    -->
    <exclude name="UnusedModifier" />

    <!-- This rule is buggy (http://sourceforge.net/p/pmd/bugs/792/ and others). -->
    <exclude name="UnusedPrivateMethod" />
  </rule>

  <rule ref="rulesets/java/optimizations.xml">
    <exclude name="AvoidInstantiatingObjectsInLoops" />
    <exclude name="LocalVariableCouldBeFinal" />
    <exclude name="MethodArgumentCouldBeFinal" />
    <exclude name="RedundantFieldInitializer" />
    <exclude name="UseStringBufferForStringAppends" />
    <exclude name="SimplifyStartsWith" />
  </rule>

</ruleset>