Groovy-Eclipse 2.5.2: java.lang.ClassNotFoundException: picocli.CommandLine$ParameterException

Question

I'm using Eclipse 4.5 with the Groovy-Eclipse 2.9.2/4.5 plugin which I thought was supposed to have the Groovy 2.5 compiler. However, it didn't have any picocli support so I added the groovy-cli-picocli-2.5.2-indy.jar to my classpath and was able to compile. However #2, when trying to run the script via Eclipse I get:

java.lang.ClassNotFoundException: picocli.CommandLine$ParameterException

It looks like groovy-cli-picocli-2.5.2-indy.jar does not have CommandLine class at all.

I would just throw jars at this from the fullblown picocli distribution but I'm under the impression they all have to somehow wrap nicely into Eclipse Groovy library via groovy.cli.picocli.CliBuilder.

Is my Groovy 2.5.2 missing this or am I somehow missing the boat on how it's supposed to work because picocli is not working for me in this configuration. Thanks!

Answer 1

You are correct: groovy-cli-picocli-2.5.2.jar (and groovy-cli-picocli-2.5.2-indy.jar) do not contain the picocli classes.

You need to add the picocli jar to the classpath.

If you use Maven, the groovy-all POM should include all dependencies.

(My original answer mentioned picocli classes that are shaded into the groovy-2.5.x.jar under the groovyjarjarpicocli package but these are intended for use internally by Groovy and not meant to be used by applications.)