Folks,

hopefully someone of you is able to make me understand the following:

Maven 3 class loading [1] says that extensions are available to plugins. E.g., Wagon FTP should be available to Maven Deploy Plugin oder Wagon Maven Plugin. While working on MNG-6965 I came across this MNG-4381 which makes [1] with Wagon FTP possible. Going through I get to MNG-2749 and MNG-3281. The very spot making this happen is:
https://github.com/apache/maven/blob/9567da2bc889a94f5c3b692b4afb310ddbacd6e5/maven-core/src/main/java/org/apache/maven/project/DefaultProjectBuildingHelper.java#L213-L221

I am really confused right now. One ticket says (MNG-4381) that Maven 2.x did not provide extensions to be visible to plugins yet MNG-2749 says the opposite. Moreover, MNG-3281 says that this is to be restored. Looking at the provided snippet, this works as long as the extensions is a single artifact w/o a dependency tree which is actually a hack for backwards-compat to Maven 2.x.

So please tell me, since Wagon FTP is more than one artifact, how can this be available to plugins?

Michael


[1] https://cwiki.apache.org/confluence/display/MAVEN/Maven+3.x+Class+Loading

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