Apply command-line overrides

OmegaConf.from_dotlist() parses key=value strings. It builds nested containers from dotted paths and parses values as YAML. Merge the resulting config after your defaults so it wins on conflicts:

>>> from omegaconf import OmegaConf
>>> defaults = OmegaConf.create({
...     "server": {"port": 80},
...     "debug": False,
... })
>>> overrides = OmegaConf.from_dotlist(["server.port=8080", "debug=true"])
>>> cfg = OmegaConf.merge(defaults, overrides)
>>> cfg.server.port, cfg.debug
(8080, True)

OmegaConf.from_cli() reads the same format from the command-line arguments in sys.argv[1:]. Call it without arguments in an application that receives OmegaConf overrides directly. An argument parser may collect the strings and pass them to from_dotlist() instead.

The 2.4 version adds backslash escaping in key paths for keys containing literal dots, brackets, or equals signs.