I need to import this GitHub repository with signed commits into Launchpad to build packages for this PPA.
A direct import will not work, due to this bzr-git bug, but a fast-export/fast-import is a workaround, according to https://bugs.launchpad.net/ubuntu/+source/bzr-git/+bug/1084403/comments/9.
I want to use my Raspberry Pi, which runs 24/7 as a web server, to make the conversion to bzr using fast-export/fast-import then have Launchpad automatically import it.
What is the best way to do this?
The conversion needs to be able to be run as a cron job, and the converted repository needs to be able to be imported by Launchpad automatically.
This is no longer an issue because, as of November 2016, Lauchpad supports direct git-to-git code imports and mirroring of git repositories hosted elsewhere. Simply mirror/import via git instead of bzr and everything will be copied across, signed commits and all.