This project attempts to push the Hack/hhvm ecosystem forward by tracking the support for the stricter hh_client options. Hack is by default decently strict, but projects may decide to restrict themselves to a stricter subset of Hack, in exchange for better typing. However, when a dependency (first or third party) does not meet these stricter requirements, the typechecker errors on those dependencies. This project tries to find the set of options that all* oss project adhere to, as a common baseline. I will also be making contributions to those oss projects, to try and allow more options to be a baseline.
If you believe that the stricter hh_client options are providing value, you may decide to add your project (or a project you use) to the composer.json file. That way, I'll be warned about incompatibilities with these projects. I might even chip in to make your project meet the requirements for these options.
At the root of this project, you'll find the .hhconfig file. The options that are set in there have been found to work for all the listed dependencies. You can copy these options as a base for you own project, removing those that you don't care about, without fear that a library will not support these options.
For the full list of checked libraries, see composer.json.
This project intentionally depends on the bleeding edge. If you are not able/willing to run hhvm-latest and/or some projects dev-master, you might find that some options don't work for you yet.
hhast-lint support
In order to lint, you will need to navigate into the project and lint with its hhast-lint.json file.