does maven shade plugin transformers accepts wildcards

Question

Recently I found a solution to a problem with an application I'm working on.

Briefly: I was building my application with maven shade plugin and I was having a problem because JasperReport was giving me a JRRuntimeException. I solved it by adding a configuration to the shade plugin with transformers.

Now I was wondering if the transformers accept wildcards so you don't need to include every file as a resource. For instance, I would want something like

<transformers>
    <transformer implementation="org.apache.maven.plugins.shade.resource.ResourceBundleAppendingTransformer">
        <!-- every .properties file will be merged (if name repeated elsewhere) -->
        <resource>*.*</resource>
    </transformer>
</transformers>

I found something in the examples about ResourceBundleAppendingTransformer where <basename> is used but I don't quite understand how it works.

I anyone knows how the ResourceTransformer works and how to configure it to accomplish what I need, please let me know.

Thanks in advance for your answers.

Answer 1

You do not need to specify a wildcard with ResourceBundleAppendingTransformer. It uses a pattern to find .properties files for locales. For example, if your resource bundles are under src/main/resources/i18n/messages, just configure your transformer this way:

<transformer implementation="org.apache.maven.plugins.shade.resource.ResourceBundleAppendingTransformer">
    <basename>i18n/messages</basename>
</transformer>