Bug#1039607: libjansi-java: causes maven to always output escape character

[Luís Picciochi Oliveira]

Package: libjansi-java
Version: 2.4.0-1
Severity: normal
X-Debbugs-Cc: Pitxyoki at Gmail.com

Dear maintainer,

I'm running commands that use the `mvn` and capture the output coming from it.

More specifically, I'm catching the version of a Maven project with a command
like the following:

  mvn --batch-mode --quiet -DforceStdout help:evaluate
-Dexpression="project.version"


Up until Debian Bullseye, the output from the command above was a single string
with only the version, as intended. For example: "1.0.0-SNAPSHOT".

After upgrading to Debian Bookworm, the `mvn` command now outputs escape
characters, regardless of the flags passed to it.
The example above has now become: "ESC[0m1.0.0-SNAPSHOTESC[0m".

I tested with the upstream Maven package of the same version, and could narrow
down the problem as coming from the libjansi-java jar.

If I downgrade it back to the Debian-packaged version 2.4.0-1, the old
behaviour is restored.

This change seems to have been due to this commit:
https://salsa.debian.org/java-
team/jansi/-/commit/7f186cd4fc22308d7769db8eeeca26b560b81b1a


You can probably reproduce this very simply with the following:
(running `mvn` anywhere should work - it doesn't have to have a Maven project
and the error message is irrelevant to reproduce what we need)

  mvn --batch-mode --quiet | less


* With libjansi-java 2.4.0-2, escape characters are seen in the output, like
so:

ESC[0m[INFO] Scanning for projects...
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
(...)
[ERROR] [Help 1]
http://cwiki.apache.org/confluence/display/MAVEN/NoGoalSpecifiedException
ESC[0m
(END)



* With libjansi-java 2.4.0-1 (downloaded from snapshot.debian.org), escape
characters are not seen in the output:

[INFO] Scanning for projects...
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
(...)
[ERROR] [Help 1]
http://cwiki.apache.org/confluence/display/MAVEN/NoGoalSpecifiedException
(END)


Thank you and best regards,
Luís Picciochi Oliveira


-- System Information:
Debian Release: 12.0
  APT prefers stable-security
  APT policy: (500, 'stable-security'), (500, 'stable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 6.4.0-0-amd64 (SMP w/12 CPU threads; PREEMPT)
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Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8), LANGUAGE not
set
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