Hi Jan,
are you using any of the shade transformers? We had similar problems in the
PLC4X project, but configuring:
<transformers>
<transformer
implementation="org.apache.maven.plugins.shade.resource.ServicesResourceTransformer"
/>
</transformers>
Helped quite a bit.
Have a look here:
https://github.com/apache/plc4x/blob/develop/pom.xml#L1286
Hope this helps.
Chris
Am 03.12.19, 10:43 schrieb "Jan Lukavský" <je...@seznam.cz>:
Hi Matt,
thanks for reaction. Is there a workaround around this? I think that the
PR I propose is "safe" and might be considered as a hotfix before a
proper solution is found? I don't know how is the release cycle of maven
plugins defined, but if there is an upcoming release soon, this might help?
Jan
On 12/2/19 8:06 PM, Matt Foley wrote:
> Hi Jan,
> See also https://github.com/apache/maven-shade-plugin/pull/14 and
MSHADE-259
>
> I stalled on it because it appears to be a lot of work to create unit
tests for maven plugins — and there weren’t examples to follow in the shade
plugin.
> That said, I’m not sure what I did is the right way to fix it. I’ve seen
emails go by that indicate the possibility of duplication in attachment lists
affects several plugins, and the best way would be a global change in the
underlying methods for “attachArtifact” that checks to see if the requested
item is already there and not duplicate it if so (without error).
>
> Regards,
> —Matt
>
> On Nov 28, 2019, at 7:03 AM, Jan Lukavský <je...@seznam.cz> wrote:
>
> Hi Maven :),
>
> I encountered an exception in my build and I'm not sure if there is
something wrong with how I structure tasks in my pom.xml, or there is a room
for improvement of the shade plugin.
>
> The symptoms are as follows:
>
> - mvn install works just fine
>
> - mvn deploy fails on 'duplicate error: META-INF/service/....' while
shading test jar
>
> The reason for that seems that it includes the regular (not test-jar),
and that one already includes the shaded service. When shading with the other
dependencies, this fails. I managed to fix this locally with [1], but I'm not
sure if this is a proper fix. I didn't fill any JIRA yet, because I wanted to
check with you what the best solution should look like. I also don't know when
or how this broke, but at least somewhat in early 2019 this worked. I probably
changed the shade plugin to latest version later this year.
>
> Thanks for comments and suggestions!
>
> Jan
>
> [1] https://github.com/apache/maven-shade-plugin/pull/32
>
>
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