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https://issues.apache.org/jira/browse/MPH-144?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16416125#comment-16416125
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Michael Osipov commented on MPH-144:
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[https://github.com/apache/maven-plugins/pull/17]
> mvn help:evaluate -Dexpression=project.groupId Can't be used in scripts.
> ------------------------------------------------------------------------
>
> Key: MPH-144
> URL: https://issues.apache.org/jira/browse/MPH-144
> Project: Maven Help Plugin
> Issue Type: New Feature
> Reporter: Karl Heinz Marbaise
> Priority: Minor
>
> Currently if you use {{mvn help:evaluate -Dexpression=project.groupId}}
> there will be some lines generated with {{[INFO] ...]]}} If you use {{mvn
> help:evaluate -Dexpression=project.groupId -q}} you won't get anything
> printed out.
> It would be a good idea to have an output via a supplemental parameter like
> this:
> {{mvn help:evaluate -Dexpression=project.groupId -Dstdout=true -q}} to get
> printed out the information like this (:
> {code}
> 0.2.0-SNAPSHOT
> {code}
> this would give the opportunity to use the call within scripts etc.
> Also might be possible in one go:
> {{mvn help:evaluate -Dexpression=project.groupId -DoutputFile=result.txt -q}}
> to write the expression result into a file.
> Or the question is if it would be possible/good idea to print out the
> resulting expression anyway (ignoring -q for only {{[INFO]...}} parts)
> {{mvn help:evaluate -Dexpression=project.groupId -q}}
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