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From "Andy Wilkinson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MNG-5971) Imported dependencies should be available to inheritance processing
Date Tue, 23 Feb 2016 15:00:23 GMT

    [ https://issues.apache.org/jira/browse/MNG-5971?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15158998#comment-15158998
] 

Andy Wilkinson commented on MNG-5971:
-------------------------------------

AFAIK, the warnings would not appear if the dependency management had been declared directly
so I'm surprised that they appear if that dependency management has come via the import of
a bom. In their current form, I think the warnings are a hinderance rather than a help as
they actively discourage people from separating their dependency management out into a reusable
bom.

> Imported dependencies should be available to inheritance processing
> -------------------------------------------------------------------
>
>                 Key: MNG-5971
>                 URL: https://issues.apache.org/jira/browse/MNG-5971
>             Project: Maven
>          Issue Type: Bug
>          Components: Dependencies
>    Affects Versions: 3.3.3
>            Reporter: Stephane Nicoll
>            Assignee: Christian Schulte
>            Priority: Trivial
>              Labels: close-pending
>             Fix For: 3.4.0
>
>         Attachments: bom-cloud.zip
>
>
> When a project extends from a parent with a {{dependencyManagement}} section, it is not
always possible to properly override (and align) the version to use for a group of dependencies.
> We typically use Bill Of Materials to gather a group of modules and make sure their versions
are consistent. 
> The following project demonstrates the issue: https://github.com/snicoll-scratches/maven-dependency-management
> The first commit is a working use case where the parent uses a bom with version A and
we use the same bom with version B in the child. Version B is used as expected.
> The second commit demonstrates the faulty scenario. Rather than using a bom in the parent,
we use a direct dependency (provided by that bom). We still use the bom with a different version.
In that case all the dependencies but the one provided by the parent are overridden (leading
to mixed versions for the dependencies provided by the BOM).
> It looks like the distance is still used to compute the version while the graph of dependencies
should be flatten at each step for a proper override. 
> Thoughts? Thanks!



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