Some updates on this:
* The Briar Project now offers official briar-headless.jar files at e.g. [0]
* briar-headless in Debian main is not only blocked by Kotlin, but also
by Gradle; both need to be packaged with recent versions before
packaging briar-headless can start
* Additionally, each (Gradle) dependency of briar-headless needs to be
packaged separately for Debian main
* Plans to get into next Debian stable release with a Debian contrib
binary were given up
* Efforts will now be focused on providing an official APT repository of
The Briar Project [1]
* A mail to debian-java confirmed all of the above [2]
Updates to this ITP will also be published at [3].
[0] https://briarproject.org/jar/briar-headless-1.2.12.jar
[1] https://code.briarproject.org/briar/briar-debian/-/issues/3
[2] https://lists.debian.org/debian-java/2020/10/msg00010.html
[3] https://code.briarproject.org/briar/briar-debian/-/issues/1