diff options
Diffstat (limited to 'gnu/services/configuration.scm')
| -rw-r--r-- | gnu/services/configuration.scm | 45 |
1 files changed, 34 insertions, 11 deletions
diff --git a/gnu/services/configuration.scm b/gnu/services/configuration.scm index 21cb829382..f23840ee6d 100644 --- a/gnu/services/configuration.scm +++ b/gnu/services/configuration.scm @@ -44,10 +44,12 @@ configuration-error? define-configuration + define-configuration/no-serialization no-serialization serialize-configuration define-maybe + define-maybe/no-serialization validate-configuration generate-documentation configuration->documentation @@ -107,20 +109,34 @@ does not have a default value" field kind))) "Assemble PARTS into a raw (unhygienic) identifier." (datum->syntax ctx (symbol-append (syntax->datum parts) ...))) +(define (define-maybe-helper serialize? syn) + (syntax-case syn () + ((_ stem) + (with-syntax + ((stem? (id #'stem #'stem #'?)) + (maybe-stem? (id #'stem #'maybe- #'stem #'?)) + (serialize-stem (id #'stem #'serialize- #'stem)) + (serialize-maybe-stem (id #'stem #'serialize-maybe- #'stem))) + #`(begin + (define (maybe-stem? val) + (or (eq? val 'disabled) (stem? val))) + #,@(if serialize? + (list #'(define (serialize-maybe-stem field-name val) + (if (stem? val) + (serialize-stem field-name val) + ""))) + '())))))) + (define-syntax define-maybe (lambda (x) - (syntax-case x () + (syntax-case x (no-serialization) + ((_ stem (no-serialization)) + (define-maybe-helper #f #'(_ stem))) ((_ stem) - (with-syntax - ((stem? (id #'stem #'stem #'?)) - (maybe-stem? (id #'stem #'maybe- #'stem #'?)) - (serialize-stem (id #'stem #'serialize- #'stem)) - (serialize-maybe-stem (id #'stem #'serialize-maybe- #'stem))) - #'(begin - (define (maybe-stem? val) - (or (eq? val 'disabled) (stem? val))) - (define (serialize-maybe-stem field-name val) - (if (stem? val) (serialize-stem field-name val) "")))))))) + (define-maybe-helper #t #'(_ stem)))))) + +(define-syntax-rule (define-maybe/no-serialization stem) + (define-maybe stem (no-serialization))) (define (define-configuration-helper serialize? syn) (syntax-case syn () @@ -207,6 +223,13 @@ does not have a default value" field kind))) #t #'(_ stem (field (field-type def ...) doc custom-serializer ...) ...)))))) +(define-syntax-rule (define-configuration/no-serialization + stem (field (field-type def ...) + doc custom-serializer ...) ...) + (define-configuration stem (field (field-type def ...) + doc custom-serializer ...) ... + (no-serialization))) + (define (empty-serializer field-name val) "") (define serialize-package empty-serializer) |