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https://issues.apache.org/jira/browse/MNG-6605?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16785662#comment-16785662
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Michael Osipov commented on MNG-6605:
-------------------------------------
You cannot suppress them unless you go in batch mode. if you want to retain
colors, you have to force them because stdout is not attached to a tty.
> Unable to suppress download messages in interactive mode
> --------------------------------------------------------
>
> Key: MNG-6605
> URL: https://issues.apache.org/jira/browse/MNG-6605
> Project: Maven
> Issue Type: Improvement
> Components: Command Line
> Affects Versions: 3.6.0
> Reporter: Gunnar Wagenknecht
> Priority: Major
> Fix For: waiting-for-feedback
>
> Attachments: 2019-03-06_14-06-09.png
>
>
> When running Maven in batch mode (with option {{-B}}) it's possible to
> suppress download messages using
> "{{-Dorg.slf4j.simpleLogger.log.org.apache.maven.cli.transfer.Slf4jMavenTransferListener=warn}}"
> Example:
> {{mvn clean install -B
> -Dorg.slf4j.simpleLogger.log.org.apache.maven.cli.transfer.Slf4jMavenTransferListener=warn}}
> When leaving out the {{-B}} option this no longer works.
> *Example:*
> {noformat}
> export MAVEN_OPTS='-Xmx1g
> -Dorg.slf4j.simpleLogger.log.org.apache.maven.cli.transfer.Slf4jMavenTransferListener=warn
> -Dorg.slf4j.simpleLogger.showDateTime=true
> -Dorg.slf4j.simpleLogger.dateTimeFormat=HH:mm:ss'
> mvn clean install
> {noformat}
> Prints out time stamps as configured but does not suppress download progress
> messages.
> *Expected:*
> Suppressing "Downloaded" messages from the console output should be possible
> without requiring the "{{--batch-mode}}" command line argument.
> *Motivation:*
> Because Travis CI supports colorized output in build logs I'd like to avoid
> batch mode.
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