Provide instructions for headless systems/servers

[yurikoles]

In my case I had opened login link on my desktop, but OAuth redirect is failed, because client was running on different machine. Simple wget -q <redirect-url> in other terminal window on server machine finished login successfully.

Please also examine insync-headleass, which allows login with auth code, which is generated by Google OAuth flow, from any machine.

[harababurel]

I think the issue you're describing is already covered by an option that can be set in gcsf.toml:

# If set to true, Google Drive will provide a code after logging in and
# authorizing GCSF. This code must be copied and pasted into GCSF in order to
# complete the process. Useful for running GCSF on a remote server.
#
# If set to false, Google Drive will attempt to communicate with GCSF directly.
# This is usually faster and more convenient.
authorize_using_code = false

This doesn't involve any redirects and works well for headless setups.

I might have misread your comment, please let me know if this is the case.

[yurikoles]

Yes, this is it, sorry for noise. But I still think it should be better documented.