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https://issues.apache.org/jira/browse/MNG-5387?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Christian Schulte updated MNG-5387:
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    Affects Version/s: 3.2.3

> Add ability to replace an artifact in mid-build
> -----------------------------------------------
>
>                 Key: MNG-5387
>                 URL: https://issues.apache.org/jira/browse/MNG-5387
>             Project: Maven
>          Issue Type: Bug
>          Components: Artifacts and Repositories
>    Affects Versions: 3.1.0-alpha-1, 3.2.3
>            Reporter: Benson Margulies
>            Assignee: Benson Margulies
>             Fix For: 3.1.0-alpha-1
>
>
> To clean up how the shade plugin works, we need an API to allow it to say, 
> 'please replace the jar file that the jar plugin has given you with this 
> other one here.' 
> It turns out we already more or less have this method, due to a collection of 
> historical conflict.
> At some point in time, http://jira.codehaus.org/browse/MNG-3119 called for 
> Maven to reject more than one call to attach the same artifact to the build. 
> However, this proved an unacceptable incompatibility at the time. Instead, 
> under http://jira.codehaus.org/browse/MNG-4013, Maven was changed to log but 
> otherwise ignore all calls to 'addArtifact' on MavenProject after the first 
> for a G/A/V/C/T coordinate. 
> This decision to take 'first wins' instead of 'last wins' doesn't help much 
> of anyone. It prevents something like shade from intentionally displacing an 
> earlier execution's results, and while it doesn't produce backtraces, ever, 
> it can still be entirely confusing.
> Under this JIRA, I'm switching to 'last one wins'. This could still be 
> confusing, and someone might argue that there should be some way to 
> distinguish casual and incorrect user config that results in two plugins 
> trying to deliver the same thing from something intentional. On the other 
> hand, if two plugins are configured to attach the same G/A/V/C, having the 
> last one win makes more sense, and has the effect of enabling the desired 
> behavior in shade.



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