Re: Maven Assembly Plugin resolves extensions of dependencies -- is this intentional?

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Re: Maven Assembly Plugin resolves extensions of dependencies -- is this intentional?

Eric Lilja
For what it's worth, I noticed the same thing a while back when setting up
an offline system for a particular project at work. I was stunned at some
of the artifacts being downloaded when invoking certain plugins. Thanks for
looking into this and trying to improve the situation.

- Eric L

On Thu, Mar 11, 2021 at 4:19 PM Tamás Cservenák <[hidden email]> wrote:

> Howdy,
>
> just a quick question, I thought someone may enlighten me...
>
> Noticed, that Maven _resolves_ and _creates extension realms_ for things I
> did not opt to at all. Typical example is nexus-staging-maven-plugin, that
> maven 3.6.3 resolves at one moment in my build, despite not using it.
>
> So, what and why is maven-assembly-plugin doing this?
>
> ===
>
> Here is an example project:
> https://github.com/cstamas/mvn-md-bug
>
> Just add new dependency in POM, jackson for example that uses extensions in
> it's own build (copy paste into POM):
>
>     <dependency>
>       <groupId>com.fasterxml.jackson.core</groupId>
>       <artifactId>jackson-databind</artifactId>
>       <version>2.12.2</version>
>     </dependency>
>
> use vanilla maven 3.6.3 and run `mvn clean install -X`
>
> You will notice:
> - plugin lists 3 dependencies of project (OK), 1 will be filtered out
> (junit, test scope) OK
> - and then bunch of extensions are being resolved and created and added to
> maven (gitexe, gitsite, felix bundle plugin, and so on, up to
> nexus-staging-maven-plugin).
>
> Here is a "plain" console output of the build, that creates assembly of 2
> JARs:
> https://gist.github.com/cstamas/559b8083764ee7a9c9807551b73308f3
>
> Scroll to line 834 (where massembly begins) and just watch what it
> downloads...
>
> To me, it seems like assembly is doing much-much more than it should? Or am
> unaware why dependency build extensions need to be loaded?
>
> Note: the assembly ends up OK, it has 2 jar in it.
>
> Thanks
> T
>