SalesforceToGcsOperator requires additional packages

[hprzegendza]

Apache Airflow version: 1.10.15
Environment: GCP composer - image: composer-1.16.0-airflow-1.10.15

What happened:
When trying to import the SalesforceToGcsOperator in a DAG:

from airflow.providers.google.cloud.transfers.salesforce_to_gcs import SalesforceToGcsOperator

A Broken DAG error is reported by the composer:No module names 'airflow.providers.salesforce'

What you expected to happen:
SalesforceToGcsOperator being available.

What do you think went wrong?:
apache-airflow-backport-providers-salesforce package not being listed as required by apache-airflow-backport-providers-google

How to reproduce it:

• Import SalesforceToGcsOperator:

from airflow.providers.google.cloud.transfers.salesforce_to_gcs import SalesforceToGcsOperator

• Try using it.
• Get an error.
• Install apache-airflow-backport-providers-salesforce(2021.3.3).
• Try again.

Anything else we need to know:
The line importing the missing package:

airflow/airflow/providers/google/cloud/transfers/salesforce_to_gcs.py

Line 24 in 85b2ccb

from airflow.providers.salesforce.hooks.salesforce import SalesforceHook

EDIT: corrected the composer image's version

[boring-cyborg]

Thanks for opening your first issue here! Be sure to follow the issue template!

[mik-laj]

This dependency is listed in "Cross provider package dependencies" section. See: https://pypi.org/project/apache-airflow-backport-providers-google/

Additionally, we do not support backport providers. See. https://lists.apache.org/thread.html/rb34212bd13c44aa61e793d0fef14f4ab9d9408939b1b98dc814cf274%40%3Cdev.airflow.apache.org%3E