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https://issues.apache.org/jira/browse/MNG-8718?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tamas Cservenak reassigned MNG-8718:
------------------------------------
Assignee: Tamas Cservenak
> Restore Maven 3 compatibility: unable to use ProjectBuilder w/ Maven 4 session
> ------------------------------------------------------------------------------
>
> Key: MNG-8718
> URL: https://issues.apache.org/jira/browse/MNG-8718
> Project: Maven
> Issue Type: Bug
> Reporter: Tamas Cservenak
> Assignee: Tamas Cservenak
> Priority: Major
> Fix For: 4.0.0-rc-4
>
>
> This change is to restore Maven 3 compatibility, as currently it is
> impossible to use ProjectBuilder from Maven 3 codebase:
> {noformat}
> java.lang.IllegalArgumentException: session is null
> at org.apache.maven.impl.Utils.cast(Utils.java:45)
> at org.apache.maven.impl.InternalSession.from(InternalSession.java:52)
> at
> org.apache.maven.project.DefaultProjectBuilder$BuildSession.<init>(DefaultProjectBuilder.java:323)
> at
> org.apache.maven.project.DefaultProjectBuilder.build(DefaultProjectBuilder.java:146)
> at
> io.takari.maven.testing.Maven311Runtime.readMavenProject(Maven311Runtime.java:38)
> at
> io.takari.maven.testing.AbstractTestMavenRuntime.readMavenProject(AbstractTestMavenRuntime.java:195)
> at
> io.takari.maven.testing.AbstractTestMavenRuntime.executeMojo(AbstractTestMavenRuntime.java:221)
> at basic.UnitTest.testBasic(UnitTest.java:22){noformat}
> And maven3 codebase cannot create Maven 4 session. Hence, given these
> codebases uses this method (nicely decorated in Maven 4 and ensured nothing
> is using it):
> {noformat}
> /**
> * Nobody should ever use this method.
> *
> * @deprecated If you use this method and your code is not in Maven Core,
> stop doing this.
> */
> @Deprecated
> public RepositorySystemSession newRepositorySession(MavenExecutionRequest
> request) {
> ...
> }{noformat}
> But the problem is that session got from here is NOT associated with Maven 4
> session, but also Maven 3 codebase CANNOT associate it with it.
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