os-creds

#!/usr/bin/env python

import os
import subprocess
import sys
import yaml


# https://docs.openstack.org/openstacksdk/latest/user/config/configuration.html
# The keys are all of the keys you’d expect from OS_* - except lower case and
# without the OS prefix. So, region name is set with region_name.
def parse_key(clouds_key, clouds_value):
    if clouds_key == 'auth':
        for k in clouds_value:
            parse_key(k, clouds_value[k])
    elif not clouds_key == 'regions':
        os.putenv('OS_' + clouds_key.upper(), str(clouds_value))


def find_clouds_yaml(filename):
    if os.path.exists(filename):
        return filename
    file_path = os.path.join(os.environ.get('HOME'), '.config', 'openstack', filename)
    if os.path.exists(file_path):
        return file_path
    file_path = os.path.join('/etc', 'openstack', filename)
    if os.path.exists(file_path):
        return file_path

    print("Could not find %s" % filename)
    exit()


if len(sys.argv) < 2:
    print("You need to pass a command. For instance: %s nova list" % sys.argv[0])
    exit()

cloud = os.environ.get('OS_CLOUD')
if not cloud:
    print("OS_CLOUD isn't set. Export your cloud environment with OS_CLOUD.")
    exit()

# TODO Also load secure.yaml
config_file = os.environ.get('OS_CLIENT_CONFIG_FILE', find_clouds_yaml('clouds.yaml'))
with open(config_file) as f:
    data = yaml.safe_load(f)
    if not data.get('clouds', []).get(cloud):
        print("Cloud %s doesn't exist in clouds.yaml" % cloud)
        exit()
    for k in data['clouds'][cloud]:
        parse_key(k, data['clouds'][cloud][k])

# Call everything that was passed on the command line
try:
    subprocess.check_call(sys.argv[1:])
except subprocess.CalledProcessError as e:
    print(e.output)
    exit(e.returncode)