flycheck

    function
    boot.janet on line 4070, 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. Macros will still be 
    executed, however, so arbitrary execution is possible. Other 
    arguments are the same as `dofile`. `path` can also be a file value 
    such as stdin. Returns nil.