Add Environment Variable Option for Custom Template Location

[jeffkala]

ISSUE TYPE

• Enhancements

COMPONENT

core update to parse to add ability to set custom template location via environment variable.

SUMMARY

Allow for custom templates directory to be specified and used. This is helpful when you need to develop custom templates and usages within a project directory.

If the environment variable is not defined it reverts to existing logic to load from installed path. I have tested the change.

[FragmentedPacket]

I'm wondering if we should offer both an OS environment or pass in as an arg to parse_output.

Something like.

def parse_output(platform=None, command=None, data=None, template_dir=None):
    template_dir = os.environ.get("NTC_TEMPLATES_DIR") or template_dir
    if template_dir is None:
        template_dir = _get_template_dir()

And then keep _get_template_dir() the same.

[jmcgill298]

I would say it is good to have _get_template_dir do the environment lookup, but allow this function to override the environment by passing in the directory.

def parse_output(platform=None, command=None, data=None, template_dir=None):
    template_dir = template_dir or _get_template_dir()

I'm also okay with the PR like it is since that is more than is available today and a reasonable solution

[jeffkala]

@jmcgill298 @FragmentedPacket , just let me know either way. I don't mind taking some extra time to implement the ability to set an arg.

[FragmentedPacket]

I'm with @jmcgill298 and his way is better than mine.

I'll approve it and let you decide :)