breezewiki/src/config.rkt

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#lang racket/base
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(require racket/pretty
racket/runtime-path
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ini)
(provide
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config-true?
config-get)
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(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
'((application_name . "BreezeWiki")
(canonical_origin . "")
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(debug . "false")
(instance_is_official . "false") ; please don't turn this on, or you will make me very upset
(port . "10416")))
(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")))])
(define 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)))))))
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(when (config-true? 'debug)
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; all values here are optimised for maximum prettiness
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(parameterize ([pretty-print-columns 80])
(display "config: ")
(pretty-write (hash->list config))))