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https://issues.apache.org/jira/browse/SLING-6268?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15656405#comment-15656405
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Konrad Windszus commented on SLING-6268:
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It seems that multiple Eclipse plugins are only then supported to supply a
lifecycle mapping for the same goal when one is marked "secondary" to the other
(http://dev.eclipse.org/mhonarc/lists/m2e-users/msg05619.html). This was the
case in the past with
https://github.com/apache/sling/blob/eb1a51485d442b6d7a56670139ba0c46bf3434cf/tooling/ide/eclipse-m2e-ui/plugin.xml#L54.
Unfortunately this line prevents the same configurator from being executed
when m2e-tycho is not installed.
Therefore we will probably have to rely on the new feature "runsBefore" being
introduced with m2e 1.6
(http://www.eclipse.org/m2e/documentation/release-notes-16.html#improved-project-configurator-ordering).
That allows to specify optional secondary configurators (like m2e-tycho).
> Error reported for bundle projects: Conflicting lifecycle mapping metadata
> --------------------------------------------------------------------------
>
> Key: SLING-6268
> URL: https://issues.apache.org/jira/browse/SLING-6268
> Project: Sling
> Issue Type: Bug
> Components: IDE
> Affects Versions: Sling Eclipse IDE 1.2.0
> Reporter: Robert Munteanu
> Assignee: Konrad Windszus
> Fix For: Sling Eclipse IDE 1.2.0
>
> Attachments: eclipse-config.txt
>
>
> With a locally built Sling IDE 1.2.0 and the locally checked out Sling
> bundles I get the following kind of errors:
> {noformat}Conflicting lifecycle mapping metadata (project packaging
> type="bundle"). To enable full functionality, remove the conflicting mapping
> and run Maven->Update Project Configuration.{noformat}
> This one is for example for org.apache.sling.api . I do have Tycho Project
> Configurators 0.8.0.201409231215 installed. I'll attach my configuration
> details, if needed.
> The whole Sling checkout is at r1768748.
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