Confuse - Jinja Variables

Simple Ansible-style variable parsing for Confuse config files using Jinja2.

Install

pip install confuse-jinja

Usage

# config.yml
asdf:
  blah: asdf{{ C.other.thing }}
nested: '{{ C.asdf }}' # need to quote if you start with a '{'
other:
  thing: 456

import confuse
import confuse_jinja
confuse_jinja.enable() # now you can use jinja2 templates inside your config values

config = confuse.Configuration('asdf')
config.set(confuse.load_yaml('config.yml'))

assert config['asdf']['blah'].get() == 'asdf456'
assert config['nested'].get() == {'blah': 'asdf456'}

How it works

• for any config values that are a string, render it as a jinja2 template
• try to parse rendered string as python using ast functions graciously pulled from ansible's source code
  • if a valid python object (list, dict, etc.) can be parsed from the string the object will be returned, otherwise it will return as a string.

TODO:

• test in a yaml file (possible syntax errors)
• enable on a config-by-config object basis instead of globally.
  • would need to replace ConfigView.__getitem__ for a single Config
  • would require using self.Subview instead of global Subview