a function allows to generate json key file used by google api from environment variables

create_keyfile_dict.py

"""
A function allows to generate json key file used by google api from environment variables. Example of `.env` file:

```
TYPE="my_service_account"
PROJECT_ID="my_project_id"
PRIVATE_KEY_ID="my_private_key_id"
PRIVATE_KEY="-----BEGIN PRIVATE KEY-----
my_private_key_content
-----END PRIVATE KEY-----
"
CLIENT_EMAIL="my_client_email"
CLIENT_ID="my_client_id"
AUTH_URI="https://accounts.google.com/o/oauth2/auth"
TOKEN_URI="https://oauth2.googleapis.com/token"
AUTH_PROVIDER_X509_CERT_URL="https://www.googleapis.com/oauth2/v1/certs"
CLIENT_X509_CERT_URL="my_client_x509_cert_url"
UNIVERSE_DOMAIN="googleapis.com"
```

"""

import os


def create_keyfile_dict() -> dict[str, str]:
    """ Create a dictionary with keys for the Google API from environment variables
    Returns:
        Dictionary with keys for the Google API
    Raises:
        ValueError: If any of the environment variables is not set
    """
    variables_keys = {
        "type": os.getenv("TYPE"),
        "project_id": os.getenv("PROJECT_ID"),
        "private_key_id": os.getenv("PRIVATE_KEY_ID"),
        "private_key": os.getenv("PRIVATE_KEY").replace('\\n', '\n'),
        "client_email": os.getenv("CLIENT_EMAIL"),
        "client_id": os.getenv("CLIENT_ID"),
        "auth_uri": os.getenv("AUTH_URI"),
        "token_uri": os.getenv("TOKEN_URI"),
        "auth_provider_x509_cert_url": os.getenv("AUTH_PROVIDER_X509_CERT_URL"),
        "client_x509_cert_url": os.getenv("CLIENT_X509_CERT_URL")
    }
    for key, _ in variables_keys.items():
        if variables_keys[key] is None:
            raise ValueError(f"Environment variable {key} is not set")
    return variables_keys