Format but do not modify

[db7]

Is it possible to tell fmt to format (indentation, line breaks, etc) but not modify the code? In particular, I’d like fmt to stop changing ( ) into [ ] (in some of my source codes).

[sorawee]

Definitely "yes" for the upcoming fmt2 (though I have not been actively working on it), and "kinda yes" for the current fmt.

In the current version of fmt, you can create .fmt.rkt in the project root with the following content:

#lang racket/base

(provide the-formatter-map)
(require fmt/params)

(current-adjust-paren-shape #f)

(define (the-formatter-map s)
  #f)

Then, when you call raco fmt <path/to/file.rkt> from the project root, paren shapes won't be converted.

(The above method works, but it is very ad-hoc. The goal of fmt2 is to make this kind of configuration adjustment less ad-hoc.)