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Support environment variables for configuration

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Cadence Ember 2022-09-17 22:51:42 +12:00
parent 711a8225fb
commit b57fd99c7d
Signed by: cadence
GPG key ID: BC1C2C61CF521B17
1 changed files with 13 additions and 2 deletions
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15
src/config.rkt
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@ -1,6 +1,8 @@
#lang racket/base
(require racket/pretty
(require racket/function
racket/pretty
racket/runtime-path
racket/string
ini)
(provide
@ -51,7 +53,16 @@
l
(printf "note: ~a items loaded from config file~n" (length l)))))
(define combined-alist (append default-config loaded-alist))
(define env-alist
(let ([e-names (environment-variables-names (current-environment-variables))]
[e-ref (λ (name) (bytes->string/latin-1 (environment-variables-ref (current-environment-variables) name)))])
(map (λ (name) (cons (string->symbol (string-downcase (substring (bytes->string/latin-1 name) 3)))
(e-ref name)))
(filter (λ (name) (string-prefix? (bytes->string/latin-1 name) "BW_")) e-names))))
(when (> (length env-alist) 0)
(printf "note: ~a items loaded from environment variables~n" (length env-alist)))
(define combined-alist (append default-config loaded-alist env-alist))
(define config
(make-hasheq