[jira] [Created] (MNG-7772) Allow to register maven core extension in .m2 folder instead of MAVEN_HOME

["Roy Teeuwen (Jira)" <ji...@apache.org>]

Roy Teeuwen created MNG-7772:
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             Summary: Allow to register maven core extension in .m2 folder instead of MAVEN_HOME 
                 Key: MNG-7772
                 URL: https://issues.apache.org/jira/browse/MNG-7772
             Project: Maven
          Issue Type: Improvement
            Reporter: Roy Teeuwen


Currently the way to register a maven core extension is described here: [https://maven.apache.org/guides/mini/guide-using-extensions.html]

Namely the following ways are supported:
 * Registered via extension jar in {{${maven.home}/lib/ext}}
 * Registered via CLI argument {{mvn -Dmaven.ext.class.path=extension.jar}}
 * Registered via [{{.mvn/extensions.xml}} file|https://maven.apache.org/configure.html#mvn-extensions-xml-file]

The downside of this is that the ${maven.home} directory is not something that you should touch, seeing as with every update of maven (through for example homebrew), it will replace the directory with the new version, making it required to manually re-register the core extension by dragging the jar in /lib/ext.

My proposal is to also make it possible to register the extension through the ${user.home}/.m2 folder. This could for example be by also allowing the extensions.xml in the .m2 folder or by creating an ext folder in the .m2 folder.



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