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https://issues.apache.org/jira/browse/GROOVY-8592?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16483948#comment-16483948
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Paul King commented on GROOVY-8592:
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Hmmm, I wish we had looked at all of these earlier. This puts more weight
behind swapping to the unix standards.
But I think lets just stick with everything as it is now. groovydoc is modeled
after javadoc which doesn't support the single letter short options, so lets
just leave it as is too. We can consider a cleanup of switches used in Groovy
3.0.
> Migrate command line tools to picocli version of CliBuilder
> -----------------------------------------------------------
>
> Key: GROOVY-8592
> URL: https://issues.apache.org/jira/browse/GROOVY-8592
> Project: Groovy
> Issue Type: Improvement
> Components: command line processing
> Affects Versions: 2.5.0-rc-3
> Reporter: Remko Popma
> Priority: Major
>
> The following command line tools use either {{groovy.cli.commons.CliBuilder}}
> or implicitly use {{groovy.util.CliBuilder}} which delegates to the
> commons-cli version of CliBuilder:
> * groovyConsole (groovy.ui.Console)
> * groovydoc (org.codehaus.groovy.tools.groovydoc.Main)
> * groovysh (org.codehaus.groovy.tools.shell.Main)
> This ticket proposes to use {{groovy.cli.picocli.CliBuilder}} instead, so
> that all command line tools in the {{bin}} directory of the Groovy
> distribution show usage help in ANSI colors.
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