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Posted to issues@maven.apache.org by "Guillaume Nodet (Jira)" <ji...@apache.org> on 2025/01/07 09:19:00 UTC

[jira] [Comment Edited] (MNG-8494) Restore Maven 3 compatibility

    [ https://issues.apache.org/jira/browse/MNG-8494?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17910553#comment-17910553 ] 

Guillaume Nodet edited comment on MNG-8494 at 1/7/25 9:18 AM:
--------------------------------------------------------------

[~slachiewicz] you mean for plugins ? 

The rules are quite simple
*  the plugin can only depend on `org.apache.maven:maven-api-*` artifacts (no any other maven related artifacts) at compile time
* avoid plexus artifacts at compile time
* mojo annotations are now in {{org.apache.maven.api.plugin.annotations}} package
* injection annotations come from {{org.apache.maven.api.di}}
* replace {{MavenSession}} with {{org.apache.maven.api.Session}}, {{MavenProject}} with {{org.apache.maven.api.Project}}, classes from {{org.apache.maven.model}} with their counterparts from {{org.apache.maven.api.model}}
* unit test needs JUnit 5 and need the {{org.apache.maven.api.plugin.testing}}


was (Author: gnt):
[~slachiewicz] you mean for plugins ? 

The rules are quite simple
*  the plugin can only depend on `org.apache.maven:maven-api-*` artifacts (no any other maven related artifacts) at compile time
* avoid plexus artifacts at compile time
* mojo annotations are now in {{org.apache.maven.api.plugin.annotations}} package
* injection annotations come from {{org.apache.maven.api.di}}
* replace {{MavenSession}} with {{org.apache.maven.api.Session}}, {{MavenProject}} with {{org.apache.maven.api.Project}}, {{org.apache.maven.model.*}} with {{org.apache.maven.api.model.*}}
* unit test needs JUnit 5 and need the {{org.apache.maven.api.plugin.testing}}

> Restore Maven 3 compatibility
> -----------------------------
>
>                 Key: MNG-8494
>                 URL: https://issues.apache.org/jira/browse/MNG-8494
>             Project: Maven
>          Issue Type: Task
>          Components: API
>            Reporter: Guillaume Nodet
>            Priority: Critical
>             Fix For: 4.0.0-rc-3
>
>
> The Maven 3 modules have been moved into the  {{/compat/}} directory.
> But before this happened and the new Maven 4 API was introduced, those classes undergo quite some incompatible changes.  Given they are now deprecated, it would make sense to restore them to full Maven 3.9.x compatibility.



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