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Hudson commented on MNG-7612: ----------------------------- Build succeeded in Jenkins: Maven » Maven TLP » maven » master #145 See https://ci-maven.apache.org/job/Maven/job/maven-box/job/maven/job/master/145/ > Chained Local Repository > ------------------------- > > Key: MNG-7612 > URL: https://issues.apache.org/jira/browse/MNG-7612 > Project: Maven > Issue Type: New Feature > Components: Artifacts and Repositories > Reporter: Slawomir Jaranowski > Assignee: Slawomir Jaranowski > Priority: Major > Fix For: 3.9.0, 4.0.0, 4.0.0-alpha-3 > > > New feature: Chained Local Repository Manager (CLRM). > This new feature is not something one would use in production, is more > targeted to Integration Test isolation. > User story: ITs usually are run as part of Maven build – lets call it "outer > build" – that may build among other things, plugins and some artifacts needed > for the ITs. The ITs itself – let's call them "inner build" – should run in > isolated environment. > Problem: the "outer build" is usually affected by user environment > (settings.xml, use of MRM, and may use user own local repository unless > alternate specified) but also we do not want user MRM to be altered by IT > runs. The "inner build" on the other hand, may fail if use same LRM as "outer > build", as they are isolated, so they do not use settings.xml from the outer > build, may not use MRM and same remote repository IDs, and all these may lead > to mysterious "artifact not found" problems. Typically, outer build may use > MRM that defines mirrorOf with ID "my-mrm", while inner would use defaults, > where only remote repository is "central": this leads that user LRM gets > populated with artifacts available from "my-mrm" remote repository, while > inner build would know only about "central" remote repository. Enhanced LRM > (default since Maven 3.0) would refuse to serve up these artifacts. > Solution is CLRM: with CLRM user is able to specify isolated LRM for ITs, > while still making artifacts from outer LRM "visible" (discoverable) for the > IT build. Inner build uses isolated LRM solely, but for resolution purposes > still is able to resolve from outer LRM, where outer build might deployed > artifacts, plugins used by IT inner build. > Technical remark: CLRM defines "head" LRM, and list of LRM as "tail". Almost > all methods are delegated toward "head", except for find methods (metadata > and artifact), exposing tail LRM contents for artifact resolution. Also, CLRM > is *able* to enforce artifact availability (as explained above), but in most > cases (at least in IT user story), one would want to inhibit this. -- This message was sent by Atlassian Jira (v8.20.10#820010)