flycheck

    function
    boot.janet on line 4047, column 1

    (flycheck path &keys kwargs)

    Check a file for errors without running the file. Found errors will 
    be printed to stderr in the usual format. Top level functions and 
    macros that have the metadata `:flycheck` will also be evaluated 
    during flychecking. For full control, the `:flycheck` metadata can 
    also be a function that takes 4 arguments - `thunk`, `source`, 
    `env`, and `where`, the same as the `:evaluator` argument to 
    `run-context`. Other arguments to `flycheck` are the same as 
    `dofile`. Returns nil.