How do I read a yaml file and outputting the yaml file values as environment variables?-CodePudding

I have my environment variables stored in a YAML file. The YAML file is used by a third party service for deployment.

I was wondering if there is a way to source the YAML file I am using, so that I can get access to my database credentials to run a migration once the app has been deployed?

example YAML:

env_variables:
  DATABASE_CONNECTION_ADDRESS: 'localhost'
  DATABASE_PORT: '5432'
  DATABASE_NAME: 'a-db'
  DATABASE_USERNAME: 'user'
  DATABASE_PASSWORD: 'password'
  IS_DEBUG: 'false'
  GS_BUCKET_NAME: image-bucket

My main motivation is that this deployment is running in a pipeline and I do not want to maintain the duplication of each of these environment variables in their own secret, and storing this YAML file as a secret so the third party service has access to it.

CodePudding user response：

If you have Python installed in your environment and can install ruamel.yaml in there you can source the output of the following one-liner:

python -c 'from pathlib import Path; from ruamel.yaml import YAML; print("".join([f"{k}={v}\n" for k, v in YAML().load(Path("example.yaml"))["env_variables"].items()]))'

Its output is:

DATABASE_CONNECTION_ADDRESS=localhost
DATABASE_PORT=5432
DATABASE_NAME=a-db
DATABASE_USERNAME=user
DATABASE_PASSWORD=password
IS_DEBUG=false
GS_BUCKET_NAME=image-bucket

As Jeff Schaller suggested you probably want to quote the values and escape any single quotes that might occur in the string. This can easily be achieved by changing {v} into {v!r} in the one-liner.

As program:

#!/usr/bin/env python3

from pathlib import Path
from ruamel.yaml import YAML

file_in = Path("example.yaml")

yaml = YAML()
env_data = yaml.load(file_in)["env_variables"]
print("".join([f"{k}={v!r}\n" for k, v in env_data.items()]))