Enhancement: add a --profile option

As I understand it, Kobo supports loading configuration values from a file:

Line 111 in 7500cd7

def load_from_file(self, file_name):

And the extent of runtime configuration for a (global) profile is generally implemented through environment variables in a downstream client:

kobo/kobo/client/__init__.py

Line 35 in 7500cd7

3) Define and call main() function

Users would have to write wrapper scripts to ensure the correct profile is set if using this approach.

Could configuration profiles be implemented as a CLI option? The option could look like this:

$ downstream-kobo-client --help
Usage: downstream-kobo-client <command> [args] [--help]

Options:
  -h, --help           show this help message and exit
  --username=USERNAME  specify user
  --password=PASSWORD  specify password
  --profile=PROFILE    specify profile

Which could run like this:

$ downstream-kobo-client --profile=${PROFILE}

And this in turn could look in a designated configuration folder like so:

/etc/downstream-kobo-client/${PROFILE}.conf

Released in kobo 0.18.0.