The Maven wrapper distribution (~/.m2/wrapper/dists) was cached in the same
entry as the local Maven repository (~/.m2/repository), keyed on a hash of
**/pom.xml (plus wrapper properties and extensions). Because pom.xml changes
frequently and no restoreKeys are used (by design, #269), almost every change
produces a full cache miss and the wrapper distribution is re-downloaded via
mvnw — which intermittently fails due to upstream rate limiting.
The wrapper distribution only depends on maven-wrapper.properties, which
changes very rarely. Give it its own cache entry keyed solely on
**/.mvn/wrapper/maven-wrapper.properties so it survives the frequent pom.xml
changes that rotate the main dependency cache key.
- Add a generic additionalCaches concept to PackageManager, restored and saved
independently with name-scoped state keys.
- Move ~/.m2/wrapper/dists out of the main maven path into a maven-wrapper
additional cache; skip silently when the project does not use mvnw.
- Keep cache-hit / cache-primary-key outputs driven by the main cache.
- Update tests, docs, and rebuild dist bundles.
Fixes#1095
Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>
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