Allow "ReadOnly" mode for GitHub

[stramel]

Some users would only be allowed to read from a GitHub repo. It would be nice to hide the "Update" button when the authorized user doesn't have push: true.

https://docs.github.com/en/rest/repos/repos#get-a-repository

"permissions": {
    "pull": true,
    "push": false,
    "admin": false
  },

[six7]

This should already be the case, is it not for you?

[stramel]

Ah, you're correct. Sorry for the noise.