Proposal for V2 passthrough args support: https://docs.google.com/document/d/18-WFAYiktq3DAfOQPrnU5yaycT6V1K27yrnFPoGgTIA/edit#. Comments appreciated! Main insight is that we need to allow support per-tool, not per-goal. We must be able to specify something like

./pants --pylint-passthrough-args=arg1 --isort-passthrough-args=arg2 lint ::

, rather than

./pants --lint-passthrough-args=arg1

(which would pass the argument to both Pylint and isort, which won’t work)