Gradle "Entry .classpath is a duplicate but no duplicate handling strategy has been set"

Question

I'm trying to build a gradle project but, when I try $ gradle build I get the following output:

Starting a Gradle Daemon (subsequent builds will be faster)
> Task :jar FAILED

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':jar'.
> Entry .classpath is a duplicate but no duplicate handling strategy has been set. Please refer to https://docs.gradle.org/7.0/dsl/org.gradle.api.file.CopySpec.html#org.gradle.api.file.CopySpec:duplicatesStrategy for details.

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

* Get more help at https://help.gradle.org

BUILD FAILED in 11s
4 actionable tasks: 2 executed, 2 up-to-date

After doing Get-ChildItem -Path ./ -Filter .classpath -Recurse -Force I concluded that I don't even have a single file named .classpath in my project. What do I do?

Answer 1

jar {
   duplicatesStrategy(DuplicatesStrategy.EXCLUDE)
}