#22968 Help for subsystem providers has a lot of mistakes Issue created by sureshjoshi

pex

is listed under

pants.backend.python.lint.yapf

python

is listed under

pants.backend.python.lint.isort

And there are several more. The problem is the HelpInfoExtractor's diff (along with the incoming hints).

[provider] = difflib.get_close_matches(hint, providers, n=1, cutoff=0.0)

This is often wrong, unless the subsystem is in a file with a similar name as the backend. e.g. The

pex

subsystem is located in

pex_environments

, and with the set of providers passed into that line of code - the true backend is very slow on the selection criteria (I think it's roughly 7th). Favouring shorter names is a reasonable approach, but I'm curious how often this

get_close_matches

lands versus something more declarative. pantsbuild/pants