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https://issues.apache.org/jira/browse/MNG-8542?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17921359#comment-17921359
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Slawomir Jaranowski commented on MNG-8542:
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Should be work already 
https://maven.apache.org/guides/mini/guide-configuring-plugins.html#Mapping_Collections_and_Arrays

Can you give example with reproduce issue?

> Supporting List<String> for parameters given on commandline
> -----------------------------------------------------------
>
>                 Key: MNG-8542
>                 URL: https://issues.apache.org/jira/browse/MNG-8542
>             Project: Maven
>          Issue Type: Improvement
>            Reporter: Christoph Läubrich
>            Priority: Major
>
> for CLI invocation it is currently not possible to pass parameters as 
> property that are lists.
> This often leads to mojos that need to define (and handle) two types of 
> parameter one for a CLI invocation and one for more structured use in pom.xml
>  
> It would be good to have an exception for the rule that one can't pass 
> collections as properties for List<String>/Collection<String>/... by assume 
> that these are a comma separated list if given as a property.



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