This has since been officially adopted by CircleCI, and includes the remodeled CLI v2.
The official CLI from CircleCI](https://github.com/circleci-public/circleci-cli) wraps a docker execution with some dynamic versioning/updating support. Self-updating formula is a no-no for Homebrew, but Homebrew install for CircleCI has been requested.
This formula is maintained by Eddie to mirror official CLI features using official CircleCI images.
Project link: https://github.com/eddiewebb/circleci-cli