def load_config(config_file, environment, region, template, parameters):
"""
Build hierarchy of configurations by loading multi-document config file.
There must be a matching config for the environment name and region.
:param str config_file: Path to config file
:param str environment: Environment being updated
:param str region: Region for the Stack
:param str template: Override value for Template from command line
:param list parameters: Override values for Parameters from the command line
:return: Top of Config hierarchy
:raises validationException: If config file not found, matching environment not found in config or config is invalid
"""
arg_config = create_arg_config(environment, region, template, parameters)
try:
with open(config_file) as c:
raw_configs = yaml.safe_load_all(c)
all_config = None
env_config = None
for rc in raw_configs:
config = Config(rc)
if Config.is_all(config.environment):
all_config = config
elif config.environment == environment and config.region == region:
env_config = config
if not env_config:
raise ValidationError(
f'Environment {environment} for {region} not found in {config_file}'
)
env_config.set_parent(all_config)
arg_config.set_parent(env_config)
# Validate before returning
arg_config.validate()
return arg_config
except FileNotFoundError:
raise ValidationError(f'Config file {config_file} not found')
def test_is_all():
assert Config.is_all('all')
assert not Config.is_all('dev')