[jira] [Updated] (SOLR-17697) Add opt-in picocli command-line parser (including some tools)

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

     [ https://issues.apache.org/jira/browse/SOLR-17697?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jan Høydahl updated SOLR-17697:
-------------------------------
    Summary: Add opt-in picocli command-line parser (including some tools)  (was: Use picocli instead of commons-cli)

> Add opt-in picocli command-line parser (including some tools)
> -------------------------------------------------------------
>
>                 Key: SOLR-17697
>                 URL: https://issues.apache.org/jira/browse/SOLR-17697
>             Project: Solr
>          Issue Type: Improvement
>          Components: cli
>            Reporter: Jan Høydahl
>            Assignee: Jan Høydahl
>            Priority: Major
>              Labels: pull-request-available
>          Time Spent: 17h 20m
>  Remaining Estimate: 0h
>
> Apache commons-cli has served us well for years, but our CLI has out-grown its capabilities, with multiple sub commands and a plethora of options and arguments. We have much custom code to work around limitations.
> By embracing [Picocli|https://picocli.info/], an annotation based cli framework, it will be easier to maintain the cli and add further tools. We propose to target 10.1 and do work gradually in a feature branch.
> The feature branch is {{{}jira/SOLR-17697-picocli{}}}, you can view it in a [draft PR not intended for merge|https://github.com/apache/solr/pull/3254]. That PR has a description on how to contribute, and a checklist of tools not yet converted. Once all tools are converted, all tests are green and all docs updated, we can merge this work.
> There is an env var {{SOLR_PICOCLI=true}} that we currently use to swtich from old commons-cli and new picocli. Once the feature branch is merged we can choose to make SOLR_PICOCLI default to true but retain the old commons-cli parser code for a few releases, so there will be a workaround for potential bugs. 



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