I’m trying to set up a dummy Pijul repository as part of a GitHub workflow’s test phase (so I can test Pijul integration in a CLI tool). Since every workflow runs in a fresh environment, I need to run pijul key generate foo, but it requires interaction. I tried working around it with printf, but no luck:

$ printf "\n" | pijul key generate foo
Password for the new key (press enter to leave it unencrypted): Error: The handle is invalid. (os error 6)

Is there any way around this right now?

You could try expect, which lets you automate interactive console applications.