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https://issues.apache.org/jira/browse/MPH-99?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15582959#comment-15582959
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Guillaume Boué commented on MPH-99:
-----------------------------------

In the quiet mode, interesting things are defined as the errors... and there 
are possibly scripts that rely on this definition, reading {{stderr}} in quiet 
mode to get only the errors. This parameter applies to Maven as a whole, not 
just the Help Plugin, and I'm not sure having a new specific parameter for a 
plugin, like a helpQuiet that would be quiet except for the output of the Help 
Plugin, impacting Maven itself is a good idea.

It may be a bit clunky, but this is really intended for scripts that can easily 
deal with this.

> 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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