Lets you pass your AWS CLI profile credentials to another program as environment variables

use-profile

#!/usr/bin/env python3

# Say you have a NodeJS program that uses AWS.EnvironmentVariables,
# and you want to call that with different profiles you have:
# 
# use-profile <profile> node your-script.js

import os
import sys
from configparser import ConfigParser
import subprocess

config = ConfigParser()
config.read(os.path.expanduser('~/.aws/credentials'))

try:
    profile = sys.argv[1]
except IndexError:
    sys.exit("First argument should be the profile name.")

try:
    creds = config[profile]
except KeyError:
    sys.exit("Couldn't find the profile in ~/.aws/credentials")

access_key_id = creds['aws_access_key_id']
secret_access_key = creds['aws_secret_access_key']
try:
    session_token = creds['aws_session_token']
except KeyError:
    session_token = None

os.environ['AWS_ACCESS_KEY_ID'] = access_key_id
os.environ['AWS_SECRET_ACCESS_KEY'] = secret_access_key
if session_token:
    os.environ['AWS_SESSION_TOKEN'] = session_token

subprocess.run(sys.argv[2:])