Loads a service configuration from the repository and outputs a single value (for the given key) to STDOUT.

base-repo-get-value SERVICE KEY

• SERVICE: A key of a service definition in the repository.
• KEY: The key for the value in the service definition to output.

Returns the value for the key in the service definition.

#
# service must be a zone (have $ZONE set)
if [ -z "$(base-repo-get-value ${service} ZONE)" ]; then
	echo "CRITICAL: service '${service}' is no zone (ZONE not set)" >&2
	exit 1
fi
#