Login seems to break automatic git-pull of repo

[JuanCab]

I have a URL to a TLJH server of the form

https://SERVERNAME/hub/user-redirect/git-pull?repo=https://github.com/REPO&urlpath=apps/REPO/index.ipynb

This does a git pull of the REPO and then executes the index.ipynb notebook (via appmode package). This approach made the use the notebooks easy for our non-majors who just need to execute the notebooks, not understand their code.

I had to switch from an external OAuth authenticator (oauthenticator.auth0.Auth0OAuthenticator) to the default FirstUseAuthentication. This change was necessary because our campus' default email addresses are now too long to use for account names.

The problem is now, when a user logins, it just dumps them to the blank Jupyter notebook page instead of executing git-pull and appmode. In essence,

https://SERVERNAME/hub/user-redirect/git-pull?repo=https://github.com/REPO&urlpath=apps/REPO/index.ipynb

gets treated as

https://SERVERNAME/hub/

Any ideas why this doesn't work with the FirstUseAuthentication? Interestingly, once they are logged in, the git-pull URL works, but any attempt for a user who isn't already logged in to use it fails.

Juan

[consideRatio]

I transferred this issue here from the-littlest-jupyterhub distribution repo. Could it be that query parameters are truncated somewhere when using this authenticator during the login process?