breezewiki/src/config.rkt

#lang racket/base
(require racket/runtime-path
         ini)

(provide
 config-true?
 config-get)

(define-runtime-path path-config "../config.ini")

(define (config-true? key)
  (not (member (hash-ref config key) '("" "false"))))

(define (config-get key)
  (hash-ref config key))

(define default-config
  '((port . "10416")
    (debug . "false")
    (instance-is-official . "false") ; please don't turn this on, or you will make me very upset
    (application-name . "BreezeWiki")))

(define config
  (make-hasheq
   (append
    default-config
    (with-handlers ([exn:fail:filesystem:errno?
                     (λ (exn)
                       (begin0
                           '()
                         (displayln "note: config file not detected, using defaults")))]
                    [exn:fail:contract?
                     (λ (exn)
                       (begin0
                           '()
                         (displayln "note: config file empty or missing [] section, using defaults")))])
      (let ([l (hash->list
                (hash-ref
                 (ini->hash
                  (call-with-input-file path-config
                    (λ (in)
                      (read-ini in))))
                 '||))])
            (begin0
                l
              (printf "note: ~a items loaded from config file~n" (length l))))))))

(when (config-true? 'debug)
  (printf "config: ~v~n" config))