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https://issues.apache.org/jira/browse/MNG-8138?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17851987#comment-17851987
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Michaël commented on MNG-8138:
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i think we all can agree that the direct use jar:jar in this scenario was
invalid, but having a empty jar generated and/or making it main artifact seems
unwanted. perhaps the maven-jar-plugin should log-warn or throw exceptions
about it
> Maven internal state should not allow to become "broken"
> --------------------------------------------------------
>
> Key: MNG-8138
> URL: https://issues.apache.org/jira/browse/MNG-8138
> Project: Maven
> Issue Type: Bug
> Components: Core
> Reporter: Tamas Cservenak
> Priority: Major
>
> It seems by certain goal combinations we can make Maven Project instance
> state end up in "wrong" state. Example:
> * create a packaging=pom project
> * invoke jar:jar deploy:deploy
> This will result in following:
> * MavenProject has packaging=pom
> * but, jar:jar will create (an empty) JAR and make it "main artifact"
> * deploy will happily deploy pom and jar (but they both end up on same URL,
> basically replacing each other)
> Multiple issues here:
> * Maven should "protect" MavenProject instance IMHO
> * jar:jar should not (or core should not allow) to "break the state"
> * m-deploy-p should figure out this situation: we deal with two artifacts
> (POM and "main JAR") but due packaging they end up on same URL?
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