"pmdTest" fails with "Can't find resource null" when ruleSets include "braces" (Gradle 2.0-rc-1)

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1 
$ gradle -v
------------------------------------------------------------
Gradle 2.0-rc-1
------------------------------------------------------------
  Build time:
 2014-06-06 07:02:41 UTC
Build number: none
Revision:
   b6ead6fa452dfdadec484059191eb641d817226c
  Groovy:
     2.3.2
Ant:
        Apache Ant(TM) version 1.9.3 compiled on December 23 2013
JVM:
        1.7.0_55 (Oracle Corporation 24.51-b03)
OS:
         Linux 3.14.5-1-ARCH amd64

$ find -type f | sort
./build.gradle
./src/test/java/SimpleTest.java

$ gradle pmdTest
:pmdTest FAILED
  FAILURE: Build failed with an exception.
  * What went wrong:
Execution failed for task ':pmdTest'.
> Can't find resource null.
Make sure the resource is a valid file or URL and is on the CLASSPATH. Here's the current classpath: /home/agt/lib/gradle-2.0-rc-1/lib/gradle-launcher-2.0-rc-1.jar
  * Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.
  BUILD FAILED
  Total time: 3.088 secs

Stack trace: https://gist.github.com/agt-the-walker/46e7d4e567a91dd0c8fa#file-gradle-pmdtest-stacktrace

ā€˜build.gradleā€™ contains:

apply plugin: 'java'
apply plugin: 'pmd'
  repositories { mavenCentral() }
dependencies { testCompile group: 'junit', name: 'junit', version: '4.+' }
  pmd { ruleSets = ["basic", "braces"] }

ā€˜src/test/java/SimpleTest.javaā€™ contains:

import static org.junit.Assert.assertTrue;
import org.junit.Test;
import java.util.ArrayList;
import java.util.Collection;
   public class SimpleTest {
     @Test
  public void testEmptyCollection() {
    Collection collection = new ArrayList();
    assertTrue(collection.isEmpty());
  }
}

Note that ā€˜gradle pmdTestā€™ succeeds if I remove ā€œbracesā€ from ā€˜ruleSetsā€™.

More details upon request. Thanks for your time.

2

I have similar problem with the new pmd, try to write:

pmd {
  toolVersion = '4.3'
}

This solve my problems. But how to solve it with the new PMD I donā€™t know. I think that they change the names of the ruleSets or something like this.

3

Following http://www.gradle.org/docs/release-candidate/release-notes#default-versions-of-code-quality-tools-updated was enough to solve the problem:

pmd { ruleSets = ["java-basic", "java-braces"] }
1 Like
4

This is the correct solution. If you donā€™t pin the PMD version to be used, recent Gradle versions will give you 5.x by default, which changed some rule names by prefixing them with ā€˜java-ā€™.

5

Nitpick, the link should go to 2.0 release notes: http://www.gradle.org/docs/2.0/release-notes

6

And BTW, the Gradle example in the docs still shows the old ruleset names in the example: http://www.gradle.org/docs/2.0/dsl/org.gradle.api.plugins.quality.Pmd.html