oauth2client deprecated

[dotysan]

Symptom

Nowadays pip install --upgrade google-api-python-client PyOpenSSL will cause our script to fail like this:

Traceback (most recent call last):
  File "./import-mailbox-to-gmail.py", line 36, in <module>
    from oauth2client.service_account import ServiceAccountCredentials
ImportError: No module named oauth2client.service_account

Cause

The google-api-client no longer requires/installs oauth2client package.

Workaround

pip install --upgrade google-api-python-client PyOpenSSL oauth2client

Discussion

https://google-auth.readthedocs.io/en/latest/oauth2client-deprecation.html

It looks like oauth2client.service_account.ServiceAccountCredentials.from_json_keyfile_name() has moved to google.oauth2.service_account.Credentials.from_service_account_file() but the new Credentials class doesn't define an authorize() function. It appears we'll need to use google_auth_httplib2.AuthorizedHttp(credentials) instead. But I'm not sure.

Additionally, I can't find any replacement for oauth2client.tools.argparser so I guess a workaround would be to disable the inheritance of the --auth* --noauth* args? Yuk!

[andpoi]

googleapis/google-api-python-client#620

[andpoi]

I looked for a long time to figure out this issue. My recommendation is to just use GYB with the --service-account flag

https://github.com/jay0lee/got-your-back

[renaro]

I still don't know how to fix this. As @dotysan mentioned the new Credentials class does not have authorize() function. Does anybody know how to fix it?

[eesheesh]

Updated with #65.