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https://issues.apache.org/jira/browse/MSHADE-324?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Robert Scholte closed MSHADE-324.
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Assignee: Robert Scholte
Resolution: Not A Problem
This has nothing to do with the plugin, but how Maven inheritence works and how
merges XML. For the details and options, please read
https://blog.sonatype.com/2011/01/maven-how-to-merging-plugin-configuration-in-complex-projects/
> maven-shade-plugin broken config by inheritance?
> ------------------------------------------------
>
> Key: MSHADE-324
> URL: https://issues.apache.org/jira/browse/MSHADE-324
> Project: Maven Shade Plugin
> Issue Type: Bug
> Affects Versions: 3.2.1
> Reporter: Miroslav Zaťko
> Assignee: Robert Scholte
> Priority: Major
>
> it seems like something very bad happens during configuration with
> inheritance:
> in parent pom pluginManagement:
> {code:xml}
> <configuration>
> <transformers>
> <transformer
> implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">
> <resource>META-INF/spring.handlers</resource>
> </transformer>
> </transformers>
> </configuration>
> {code}
> in child pom pluginManagement:
> {code:xml}
> <configuration>
> <transformers>
> <transformer
> implementation="org.apache.maven.plugins.shade.resource.ApacheLicenseResourceTransformer"
> />
> </transformers>
> </configuration>
> {code}
> causes broken configuration. In effective child pom is then configuration
> mixed like:
> {code:xml}
> <configuration>
> <transformers>
> <transformer
> implementation="org.apache.maven.plugins.shade.resource.ApacheLicenseResourceTransformer">
> <resource>META-INF/spring.handlers</resource>
> </transformer>
> </transformers>
> </configuration>
> {code}
> and that leads to failing build:
> {code:java}
> Unable to parse configuration of mojo
> org.apache.maven.plugins:maven-shade-plugin:3.2.1:shade for parameter
> resource: Cannot find 'resource' in class
> org.apache.maven.plugins.shade.resource.ApacheLicenseResourceTransformer
> {code}
> It seems like transformer is overwritten by different implementation, but
> it's configuration is kept from old transformer...
> it is possible to hack it with
> {code:xml}<configuration combine.self="override">{code}
> however it is definitely not correct behaviour
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