This should hopefully be easy .. How do I pass an environment variable from my OS shell to an extractor tap? I have

REQUESTS_CA_BUNDLE

configured in my developer OS (needed for allowing a custom Root CA certificate for Security filtering), which works great every time that I use the

requests

library in python and make HTTPS calls to the Internet. Now I have just found that this seems to not work when launching

meltano elt

and the tap (custom tap built with the Meltano SDK) uses the Python

requests

module. The

requests

module is seemingly ignoring the

REQUEST_CA_BUNDLE

OS environment variable when running

meltano elt

and the custom tap fails with an exception caused by the

requests

module (

requests.exceptions.SSLError: (Caused by SSLError(SSLCertVerificationError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate

) I was hoping I can configure meltano to somehow tell it to use the

REQUESTS_CA_BUNDLE

environment variable and pass it to the virtualenv when the plugin invoker launches the tap. Am I on the right path? UPDATE A bit of

print

debugging seems to indicate that I am on the wrong path with the OS environment variables. the

REQUESTS_CA_BUNDLE

OS env variable value does make it all the way into the

RESTStream

class in the singer-sdk .... It must be something else afoot ... UPDATE 2 Oh. Turns out I was on the right track indeed! There is a

requests

API that handles environment variables when using prepared requests in

requests

. Looks like by default, the behaviour of prepared requests (like the singer sdk uses it in the RESTStream) is different from "normal" requests in

requests

. https://github.com/psf/requests/issues/1436