jarSearchableOptions task fails with search/jarSearchableOptions is a duplicate under Gradle 7.0

[PawelLipski]

Plugin version: v1.0
v0.7.3 wasn't affected under Gradle 7.0.

I'm not sure if running under Gradle 6.x works around this error; I can check if needed.

I can also provide the entire offending state of the repository if needed 🕵🏻

> Task :buildSearchableOptions
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.intellij.ide.ui.laf.darcula.DarculaLaf to field javax.swing.text.html.HTMLEditorKit.DEFAULT_STYLES_KEY
WARNING: Please consider reporting this to the maintainers of com.intellij.ide.ui.laf.darcula.DarculaLaf
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
2021-05-27 16:29:32,208 [   3114]   WARN - j.internal.DebugAttachDetector - Unable to start DebugAttachDetector, please add `--add-exports java.base/jdk.internal.vm=ALL-UNNAMED` to VM options 
Starting searchable options index builder
2021-05-27 16:29:40,681 [  11587]   WARN - #com.intellij.ui.jcef.JBCefApp - JCEF is manually disabled in headless env via 'ide.browser.jcef.headless.enabled=false' 
Found 215 configurables
Searchable options index builder completed

> Task :jarSearchableOptions FAILED

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':jarSearchableOptions'.
> Entry search/jarSearchableOptions 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.

[hsz]

@PawelLipski, thanks for reporting – please provide sources to reproduce this issue.

[PawelLipski]

Pls take a look at https://github.com/VirtusLab/git-machete-intellij-plugin, branch chore/212-eap (current tip at a297482bb40bd6e65a68d7441b1155080f4882fb).

Run ./gradlew buildPlugin (use Java 11).

Also, see a failed run in CI: https://app.circleci.com/pipelines/github/VirtusLab/git-machete-intellij-plugin/4065/workflows/f54a1d08-bbc6-4f80-8a93-4b6dc79d6b25/jobs/4276

[hsz]

Thanks, Paweł – I was able to track and finally fix the issue.