How do I remove colors from Maven output?

Question

When I run a maven goal in Jenkins (e.g. "mvn test"), the logs are very hard to read because of the color control characters that appear (see example below). Is there anyway to remove the color formatting?

[[1;34mINFO[m] [1m-------------------------------------------------------------------[m
[[1;34mINFO[m] [1;32mBUILD SUCCESS[m
[[1;34mINFO[m] [1m-------------------------------------------------------------------[m
[[1;34mINFO[m] Total time: 16.097 s
[[1;34mINFO[m] Finished at: 2017-04-26T11:23:06-04:00
[[1;34mINFO[m] Final Memory: 41M/100M
[[1;34mINFO[m] [1m-------------------------------------------------------------------[m

What kind of job do you use? Maven Job or Freestyle job ? Apart from that you can simply define `-B` for --batch-mode which will turn off using of colors... — khmarbaise, Apr 26 '17 at 16:52

score 56 · Accepted Answer · answered Apr 27 '17 at 09:40

56

Thanks to khmarbaise for his/her answer in the comment to my question:

you can simply define -B for --batch-mode which will turn off using of colors..

This fixed the issue, my output now looks like this (much nicer):

[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 17.507 s
[INFO] Finished at: 2017-04-27T05:30:07-04:00
[INFO] Final Memory: 41M/100M
[INFO] ------------------------------------------------------------------------

answered Apr 27 '17 at 09:40

simbro

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Just as a note for future people, Maven 3.5.1 will be [adding an explicit flag to turn off colors](https://issues.apache.org/jira/browse/MNG-6220) – romeara Sep 14 '17 at 19:39
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Note that the actual flag is `-Dstyle.color=(auto|always|never)`. The page linked to by @romeara discusses multiple syntaxes for the option, and it is easy to miss the one that was eventually implemented. – toolforger Jul 17 '19 at 07:06
Even the answer matches the question, a better solution for shells that support color might be to fix the issue by UPGRADE MAVEN ! I had the problem under maven 3.5.2, and it was fixed with maven 3.6.1. – olir Sep 04 '19 at 12:27
Thanks Olir - since this seems to be a popular questions it's good that someone pointed that - definitely the simplest solution. – simbro Sep 04 '19 at 15:47
On a related note: if you see the ANSI codes under cygwin 3.1, it may be because maven doesn't recognise the TERM environment variable value xterm-256color. Try running: TERM=cygwin mvn – tanderson May 30 '20 at 03:54
How about giving some votes to @khmarbaise, who gave the original answer? – spekdrum Nov 16 '22 at 12:04

neves · Answer 2 · 2021-09-04T22:56:43.563

14

--batch-mode, mentioned in other answers, is usually a better option for non-interactive execution, like in a CI server, but if you want just to turn off the color, it is possible since maven 3.5.1 using the following option:

mvn -Dstyle.color=never

other options for this parameter are always or auto.

edited Sep 04 '21 at 22:56

answered Sep 12 '19 at 20:35

neves

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score 1 · Answer 3 · answered Aug 29 '19 at 10:43

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maven --batch-mode will do. However, if you have to inspect some already-generated output that contains those colour codes, you can use sed to strip the codes away, as it's explained here.

answered Aug 29 '19 at 10:43

zakmck

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Helpful extra comment about stripping colours, thank you – Zymotik Apr 11 '22 at 14:25
Thanks, @Zymotik, would be great if you could give me a vote up. – zakmck Apr 11 '22 at 15:03

score 0 · Answer 4 · answered Oct 13 '20 at 08:32

0

Jenkins Maven plugin example of batch mode -B (remove color tags) and silent mode -q inside pipeline script:

rtMaven = Artifactory.newMavenBuild()
...
rtMaven.run pom: 'pom.xml',
            goals: "-q -B clean compiler:compile"

answered Oct 13 '20 at 08:32

MichalSv

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score 0 · Answer 5 · edited Jan 30 '22 at 06:25

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set env

MAVEN_OPTS="$MAVEN_OPTS -Dmaven.color=false"

edited Jan 30 '22 at 06:25

Suraj Rao

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answered Jan 30 '22 at 06:17

user1129019

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How do I remove colors from Maven output?

5 Answers5

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