87 lines
2.6 KiB
Racket
87 lines
2.6 KiB
Racket
#lang racket/base
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(require racket/function
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racket/pretty
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racket/runtime-path
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racket/string
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ini)
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(provide
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config-parameter
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config-true?
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config-get)
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(define-runtime-path path-config "../config.ini")
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(define (config-parameter key)
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(hash-ref config key))
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(define (config-true? key)
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(not (member ((config-parameter key)) '("" "false"))))
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(define (config-get key)
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((config-parameter key)))
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(define default-config
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'((application_name . "BreezeWiki")
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(canonical_origin . "")
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(debug . "false")
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(instance_is_official . "false") ; please don't turn this on, or you will make me very upset
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(port . "10416")
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(strict_proxy . "true")))
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(define loaded-alist
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(with-handlers
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([exn:fail:filesystem:errno?
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(λ (exn)
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(begin0
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'()
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(displayln "note: config file not detected, using defaults")))]
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[exn:fail:contract?
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(λ (exn)
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(begin0
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'()
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(displayln "note: config file empty or missing [] section, using defaults")))])
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(define l
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(hash->list
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(hash-ref
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(ini->hash
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(call-with-input-file path-config
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(λ (in)
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(read-ini in))))
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'||)))
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(begin0
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l
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(printf "note: ~a items loaded from config file~n" (length l)))))
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(define env-alist
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(let ([e-names (environment-variables-names (current-environment-variables))]
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[e-ref (λ (name) (bytes->string/latin-1 (environment-variables-ref (current-environment-variables) name)))])
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(map (λ (name) (cons (string->symbol (string-downcase (substring (bytes->string/latin-1 name) 3)))
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(e-ref name)))
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(filter (λ (name) (string-prefix? (string-downcase (bytes->string/latin-1 name)) "bw_")) e-names))))
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(when (> (length env-alist) 0)
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(printf "note: ~a items loaded from environment variables~n" (length env-alist)))
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(define combined-alist (append default-config loaded-alist env-alist))
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(define config
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(make-hasheq
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(map (λ (pair)
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(cons (car pair) (make-parameter (cdr pair))))
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combined-alist)))
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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])
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(display "config: ")
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(pretty-write (sort
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(hash->list (make-hasheq combined-alist))
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symbol<?
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#:key car))))
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(when (not (config-true? 'debug))
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(when (not (config-true? 'canonical_origin))
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(displayln
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(string-append "warning: configuring canonical_origin is highly recommended for production!\n"
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" see https://docs.breezewiki.com/Configuration.html"))))
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