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https://issues.apache.org/jira/browse/MPH-99?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15582990#comment-15582990
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Michael Osipov commented on MPH-99:
-----------------------------------
I fully agree on this but this is not fully true. {{slf4j-simple}} does not do
this. It writes all type of log messages to [one
stream|https://github.com/qos-ch/slf4j/blob/master/slf4j-simple/src/main/java/org/slf4j/impl/SimpleLogger.java#L205]
and not to {{stdout}} **and** {{stderr}}.
> Evaluate has no output in quiet mode
> ------------------------------------
>
> Key: MPH-99
> URL: https://issues.apache.org/jira/browse/MPH-99
> Project: Maven Help Plugin
> Issue Type: Bug
> Components: evaluate
> Affects Versions: 2.2
> Reporter: Alexandre Garnier
> Assignee: Guillaume Boué
> Fix For: 2.2.1
>
> Attachments: output_on_quiet.patch
>
>
> When using {{help:evaluate}} in normal mode, the evaluation result is lost in
> a lot of Maven {{[INFO\]}} :
> {code:language=bash}
> $ mvn help:evaluate -Dexpression=project.version
> [INFO] Scanning for projects...
> [INFO]
> [INFO]
> ------------------------------------------------------------------------
> [INFO] Building myProject 1.0.0
> [INFO]
> ------------------------------------------------------------------------
> [INFO]
> [INFO] --- maven-help-plugin:2.2:evaluate (default-cli) @ myProject ---
> [INFO] No artifact parameter specified, using 'com.test:myProject:pom:1.0.0'
> as project.
> [INFO]
> 1.0.0
> [INFO]
> ------------------------------------------------------------------------
> [INFO] BUILD SUCCESS
> [INFO]
> ------------------------------------------------------------------------
> [INFO] Total time: 1.216s
> [INFO] Finished at: Fri Feb 07 10:32:22 CET 2014
> [INFO] Final Memory: 21M/224M
> [INFO]
> ------------------------------------------------------------------------
> $
> {code}
> I was hoping that launching Maven in quiet mode would avoid all the logs and
> only display the evaluation result, but there is just no output at all.
> {code:language=bash}
> $ mvn --quiet help:evaluate -Dexpression=project.version
> $
> {code}
> In attachment, a patch to use sysout instead of logging for evaluation output.
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