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https://issues.apache.org/jira/browse/MNG-8297?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17888364#comment-17888364
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Guillaume Nodet commented on MNG-8297:
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Try adding the following system property
\{{-Dorg.jline.terminal.dumb.color=true}}
> Color output no longer possible on dumb terminals
> -------------------------------------------------
>
> Key: MNG-8297
> URL: https://issues.apache.org/jira/browse/MNG-8297
> Project: Maven
> Issue Type: Bug
> Components: Logging
> Affects Versions: 4.0.x-candidate
> Reporter: Stefan Oehme
> Priority: Major
>
> We have a couple of integration tests for how our tool captures Maven console
> output, including color. These tests capture Maven's output in a
> ByteArrayOutputStream, which results in a "dumb terminal". With Maven 3.x, we
> still get color output. With the latest 4.x nightlies, the output is no
> longer colored. I dug through the code a bit and it seems to be related to
> the change to JLine. I tried adding `-Djansi.mode=force` to the MAVEN_OPTS,
> but that didn't bring coloring back.
> You can try this yourself by doing `export TERM=dumb`, followed by any Maven
> command. The output is uncolored, even though Maven itself says `Message
> scheme: color`
> To be clear, I think having no color on dumb terminals is the correct
> default, but there should be a switch to bring it back for testing purposes.
> If there already is, please let me know how.
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