Better error message when no versions are configured (?)
I tried running "build-all-tor.sh" and eventually got this error:
$ cd tor/
/home/nickm/src/tor-ci-reproducible/build/tor-ci-release/build/tor
=== Building tarballs for versions: ===
cat: '/versions/*': No such file or directory
=== Building tarball for tor-* on branch ===
$ git switch
fatal: missing branch or commit argument
FATAL ERROR: command 'git switch' has failed.
I didn't think I'd have to configure any versions here, since there's already a versions.yml file present in the repository.