Bug#1059147: maven: successful invocation of mvn writes unexpeceted output to stderr

[tony mancill]

On Wed, Dec 20, 2023 at 03:13:23PM +0100, Clemens Ballarin wrote:
> Package: maven
> Version: 3.8.7-1
> Severity: normal
> X-Debbugs-Cc: debian-bugreports at ankordata.de
> 
> Dear Maintainer,
> 
> Maven writes an ansi control sequence to an otherwise empty stderr:
> 
> $ mvn --help 2>&1 >/dev/null | hexdump -C
> 00000000  1b 5b 30 6d                                       |.[0m|
> 00000004
> 
> Apache's upstream version does not exhibit this behaviour, there is no output:
> 
> $ PATH=${HOME}/software/apache-maven-3.8.7/bin:${PATH} mvn --help 2>&1 >/dev/null | hexdump -C
> 
> This is also a regression from Debian 11.8 and Maven 3.6.3-5.
> 
> It complicates a somewhat pedantic test scenario. Fix would be appreciated.

This appears related to (and perhaps a duplicate of) #1039607 [1].

As I noted there, I think the strategy should be to revert the
default behavior to match upstream and add functionality as needed for
colorized output in pdebuild.

I will try to allocate some time to work on this next week.

Thanks,
tony

[1] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1039607