* Add --gh-keys so sshd setup can run without prompts
Grabbing keys from GitHub was reachable only through the interactive menu: pick
"Grab key from GitHub", then type the username into a second prompt. So the one
path that needs no secret pasted around was also the one path a script could not
take, and setting a machine up over ssh or from a provisioning run meant falling
back to --key with a key copied by hand.
--gh-keys <username> takes the same path the prompt did. The fetch and authorize
logic is unchanged and now shared, with the prompt reduced to asking for the
username and handing it over.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
* Reject a missing --gh-keys username before setting anything up
The username was only checked for being absent entirely, and only after the
server was installed and the firewall opened. So `--gh-keys=` with an unset
variable behind it configured the machine and then dropped into the interactive
menu, and `--gh-keys --help` took --help as the username and set the server up
on its way to failing the fetch -- a help flag that changes the system.
Check the value where it is parsed, and reject one that is empty or shaped like
an option.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
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Co-authored-by: Claude Opus 5 (1M context) <noreply@anthropic.com>
