I want to exclude all transitive dependencies from one dependency. In some places I\'ve seen it suggested to use a wildcard for that
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I hate getting Maven warnings myself. I've seen the wildcard approach but have avoided it. Run a mvn dependency:tree goal, discover the top-level dependencies belonging to the artefact in question and exclude each one individually (hopefully the list isn't so vast). This is by far the safest way to approach this problem.
This is a supported feature in Maven 3.2.1 - see 'Transitive dependency excludes' section in the release notes.
As to my knowing, this feature does not yet exist. In the feature request you sent, you can see it's status is still "Unresolved".