[MNG-6380] Option -Dstyle.color=always doesn't force color output

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 3.5.3
• Fix Version/s: 3.8.2, 4.0.0-alpha-2, 4.0.0
• Labels: workaround-exists
• Assignee: Michael Osipov
• Reporter: Henning Hoefer
• Created: 20/Mar/18 10:33
• Updated: 24/Jan/24 09:47
• Resolved: 22/Jul/21 12:49

Description

When the output is not a TTY (e.g. on a CI server), the new option -Dstyle.color=always doesn't work, because JAnsi itself is disabling its color output.

# OK, produces color:
mvn -B -Dstyle.color=always package

# FAIL, doesn't produce color:
mvn -B -Dstyle.color=always package | less -R

# WORKAROUND:
MAVEN_OPTS=-Djansi.force=true mvn -B -Dstyle.color=always package | less -R

The -Dstyle.color=always option needs to imply -Djansi.force=true – otherwise, "always" doesn't really mean always.

The problem for the implementation is, that the JAnsi option needs to be set as a system property way early during startup.

Issue Links

• depends upon: MNG-7079 Upgrade to jansi 2.2.0 and maven-shared-utils 3.3.4
• is fixed by: MNG-7179 Upgrade Jansi to 2.3.3
• is related to: MNG-6296 New option -Dstyle.color is not working
• links to: GitHub Pull Request #67