This is the source for https://gitern.com ... in summary it's

1. a multitenant git host
2. that uses ssh keys for auth exclusively
3. and has a command-line ui

I'm sharing it hoping it might be able to help someone build a git host on nostr. This isn't particularly relevant to be honest but does

1. have novel auth and
2. is very minimal

I will one day describe more about how it works (especially if someone bothers to ask), but this gist is:

• lots of SSHD hacks
• users are progressively chroot/jailed into isolated parts of the filesytem upon authentication with different sets of commands available

As a starting point, this is where auth begins (this is from the sshd config):

    Match User git
        AuthorizedKeysCommand /usr/bin/gitern-authorized-keys %f %t %k
        AuthorizedKeysCommandUser authorized-keys-command
        ForceCommand gitern-intake
        AcceptEnv none
        ChrootDirectory /jail

They then get forced through gitern-intake whose source is /cmd/intake/intake.go.

That should be enough for someone curious to start. Huzzah!

Extra credit

I also wrote a remote helper for gitern that end to end encrypts git repos: https://github.com/huumn/git-remote-gitern ... It's pretty inefficient and naive but it kind of shows how you might do something really freaking weird with git that runs exclusively on the client (no special git server required).