Hi

glad I could help. I completely agree with you the documentation is
lacking.

TBH you probably by now know more about how Ivy wants to be configured
than me. :-)

Stefan

On 2024-03-13, Lewis John McGibbney wrote:

> Thanks for this guidance Stefan :)
> I was able to get a patch together at https://github.com/apache/nutch/pull/803
> Hopefully this helps others who may be confused as I was.
> Thank you
> lewsmc

> On 2024/03/12 18:57:51 Stefan Bodewig wrote:
>> On 2024-03-11, lewis john mcgibbney wrote:

>>> I am working on upgrading Ivy to latest over in the Apache Nutch project.
>>> The build works just fine with 2.5.0 and 2.5.1 but with 2.5.2 the CI
>>> fails with the following complaint

>>> /home/runner/work/nutch/nutch/src/plugin/build-plugin.xml:234:
>>> impossible to ivy retrieve: java.lang.RuntimeException: problem during
>>> retrieve of org.apache.nutch#lib-htmlunit: java.lang.RuntimeException:
>>> Multiple artifacts of the module
>>> io.netty#netty-transport-native-kqueue;4.1.84.Final are retrieved to
>>> the same file! Update the retrieve pattern to fix this error.

>> Ivy 2.5.2 fixes a bug[1] when dealing with dependencies that have
>> multiple Maven artifacts with different Maven classifiers. Prior to
>> 2.5.2 Ivy would think they'd all be the same and just pick one.

>> io.netty#netty-transport-native-kqueue has several artifacts, at least
>> this is what the repo looks like. I completely fail to understand the
>> POM :-)

>> Your pattern probably needs a [classifier] to make sure two artifacts
>> that differ by Maven classifier also target different file names.

>> Something like

>> pattern="${local-maven2-dir}/[organisation]/[module]/[revision]/[module]-[revision](-[classifier]).[ext]"

>> Stefan

>> [1] https://issues.apache.org/jira/browse/IVY-1642

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