[cfe-dev] emit JSON output from clang-tidy

[Oza, Hiral via cfe-dev]

Greetings!

Exploring ways to emit JSON output from clang-tidy such that it can be cached.

Which is the right place to add/modify code  -- (a) in ClangTidyDiagnosticConsumer::finish()  [at this point we have filtered diag errors] OR
          (b) ClangTidyContext::diag() [getting invoked on each unfiltered diagnostic error]

>From ClangTidyContext, DiagnosticEngine and SourceManager, how to get json tuple {"tidy-checker":<tidy-checker-name>,"file":<source-file-name>,"line":<line#>,"column":<column#> }.

Thank you in advance.
-H