Summary: Ref T4954. There was a typo in the original implementation. It wasn't noticed until now because the `getVersion` function isn't really used anywhere.
Test Plan: Ran `arc linters` in a repository with `ArcanistJSONLintLinter` configured, noticed that the version number appeared in the output.
Reviewers: #blessed_reviewers, epriestley
Reviewed By: #blessed_reviewers, epriestley
Subscribers: epriestley, Korvin
Maniphest Tasks: T4954
Differential Revision: https://secure.phabricator.com/D9160
Summary: Ref T2039. This isn't exhaustive, but moves things forward by a decent chunk.
Test Plan: Used `arc linters` and read the messages.
Reviewers: chad, btrahan, joshuaspence
Reviewed By: joshuaspence
Subscribers: epriestley
Maniphest Tasks: T2039
Differential Revision: https://secure.phabricator.com/D9056
Summary: Provide bindings for [[https://github.com/zaach/jsonlint | JSONLint]], which is a useful tool for linting and validating JSON. Theoretically, this could be done with pure PHP, however it would not be trivial (`json_decode`, for example, does not provide any context as to JSON validation errors).
Test Plan: Wrote and executed unit tests.
Reviewers: epriestley, #blessed_reviewers
Reviewed By: epriestley, #blessed_reviewers
Subscribers: epriestley, Korvin
Differential Revision: https://secure.phabricator.com/D8988
