[jira] [Created] (SOLR-18511) Port ClusterTool to PicoCli

["Jan Høydahl (Jira)" <ji...@apache.org>]

Jan Høydahl created SOLR-18511:
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             Summary: Port ClusterTool to PicoCli
                 Key: SOLR-18511
                 URL: https://issues.apache.org/jira/browse/SOLR-18511
             Project: Solr
          Issue Type: Improvement
          Components: cli
            Reporter: Jan Høydahl


Port {{ClusterTool}} to picocli, adding the picocli code path alongside the existing commons-cli one.

*Covers:* {{bin/solr cluster}}

The command sets a single cluster property via {{\-\-property}} and {{\-\-value}}, where an omitted value unsets the property. There are no sub-commands, and the connection and credential options come from the shared mixins.

*Acceptance criteria*
* {{bin/solr cluster}} and all its options work with {{SOLR_PICOCLI=true}}, and the commons-cli path is left behaviourally unchanged.
* {{ClusterTool}} is registered in {{SolrCLI}}'s picocli {{subcommands}} list and {{ToolBase.callTool()}} is implemented, replacing the {{UnsupportedOperationException}} stub.
* Shared options reuse the existing mixins ({{ConnectionOptions}}, {{CredentialsOptions}}, {{HelpMixin}}) rather than redeclaring them.
* An {{ClusterToolPicocliTest}} subclasses the existing test and overrides only the {{runTool}} hook, so the inherited assertions run through both parsers.
* {{./gradlew :solr:solr-ref-guide:generateCliDocs}} is re-run and the generated {{cli/solr-cluster.adoc}} page is committed, so {{checkCliDocsUpToDate}} passes.

*AI assistance:* a coding-agent prompt template encoding the patterns already established by the ported tools is available at [https://gist.github.com/janhoy/a3fe0dbcaadf24b3493558946cc549d9] — name {{ClusterTool}} in its Assignment line up front and the rest of the prompt adapts. Please review agent output as carefully as hand-written code.



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