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https://issues.apache.org/jira/browse/MNG-6585?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16761298#comment-16761298
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Michael Osipov commented on MNG-6585:
-------------------------------------
Sample project please.
> Unable to load snapshot extensions from extensions.xml
> ------------------------------------------------------
>
> Key: MNG-6585
> URL: https://issues.apache.org/jira/browse/MNG-6585
> Project: Maven
> Issue Type: Bug
> Components: core
> Affects Versions: 3.3.9, 3.5.4, 3.6.0
> Reporter: Robert Thornton
> Priority: Major
>
> I'm developing an extension in a continuous build environment and Maven
> doesn't even attempt to download the extension if the entry in
> .mvn/extensions.xml has a -SNAPSHOT version. It simply fails with a warning
> that it could not find the extension without explaining why it didn't try to
> download it. This means that in order for me to try out the extension, I have
> either have to build it locally or make a release first. I've been unable to
> find any documentation that identifies this as an intentional limitation,
> which leads me to believe it must be a bug.
> For example, my extension allows the pom.xml to be written in a Kotlin DSL.
> Because my pom is named pom.kts instead of pom.xml, my build will fail if it
> cannot download the extension as defined below:
> {code:java}
> <?xml version="1.0" encoding="UTF-8"?>
> <extensions>
> <extension>
> <groupId>io.takari.polyglot</groupId>
> <artifactId>polyglot-kotlin</artifactId>
> <version>0.3.3-SNAPSHOT</version>
> </extension>
> </extensions>
> {code}
> However, if I change the version to a non-snapshot, Maven does attempt to
> download the extension:
> {code:java}
> <?xml version="1.0" encoding="UTF-8"?>
> <extensions>
> <extension>
> <groupId>io.takari.polyglot</groupId>
> <artifactId>polyglot-kotlin</artifactId>
> <version>0.3.3.beta01</version>
> </extension>
> </extensions> {code}
> It seems to me that Maven should attempt to resolve the extension regardless
> of whether it is a snapshot or not because my plugin repository in
> settings.xml has been configured to allow snapshots.
>
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