Silence duplicate-dependency-class for known duplication

[drjasonharrison]

I have a warning for duplicate classes between junit and hamcrest-core:

warning   duplicate-dependency-class         junit:junit:4.12 in configuration ':moduleA:compile' has 21 classes duplicated by org.hamcrest:hamcrest-core:1.3 (use --debug for detailed class list) (no auto-fix available)

I think I can ignore this warning because I have examined it and determined that junit is importing hamcrest-core and I believe that junit is doing the right thing:

+--- com.googlecode.json-simple:json-simple:1.1.1
|    \--- junit:junit:4.10
|         \--- org.hamcrest:hamcrest-core:1.1

1. Is it safe to ignore this warning?
2. Is there a way to silence this exact warning?

[DanielThomas]

This rule is listing class files in the jars on a configuration, and looking for duplicates. This is what's causing the violation:

zipinfo -1 junit-4.10.jar | grep 'class$' | grep hamcrest
org/hamcrest/BaseDescription.class
org/hamcrest/BaseMatcher.class
org/hamcrest/CoreMatchers.class
org/hamcrest/Description.class
org/hamcrest/Factory.class
org/hamcrest/Matcher.class
org/hamcrest/SelfDescribing.class
org/hamcrest/StringDescription.class
org/hamcrest/core/AllOf.class
org/hamcrest/core/AnyOf.class
org/hamcrest/core/DescribedAs.class
org/hamcrest/core/Is.class
org/hamcrest/core/IsAnything.class
org/hamcrest/core/IsEqual.class
org/hamcrest/core/IsInstanceOf.class
org/hamcrest/core/IsNot.class
org/hamcrest/core/IsNull.class
org/hamcrest/core/IsSame.class
org/hamcrest/internal/ArrayIterator.class
org/hamcrest/internal/SelfDescribingValue.class
org/hamcrest/internal/SelfDescribingValueIterator.class

junit:junit:4.12 doesn't bundle these classes like this, and instead depends on hamcrest-core to provide them.

[drjasonharrison]

So you're saying

1. No, it isn't prudent to ignore this warning
2. There is no way to silence the warning through Nebula.

Can you please provide pointers on how to address this issue? I can open an issue with Junit.

[DanielThomas]

You can ignore the warning, but like I said, 4.12 doesn't bundle classes like this, so you can just upgrade.