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| author | Mathieu Othacehe <m.othacehe@gmail.com> | 2017-03-24 11:00:13 +0100 |
|---|---|---|
| committer | Clément Lassieur <clement@lassieur.org> | 2017-03-24 16:09:17 +0100 |
| commit | e7c797f3481a35905a5861059294815b2210f889 (patch) | |
| tree | c5c8b429789039af647def13fb77edef175f6aa1 /gnu/services/configuration.scm | |
| parent | 32e75b4808c312f6ef99a2e200a75a0d056b60fe (diff) | |
| download | guix-e7c797f3481a35905a5861059294815b2210f889.tar guix-e7c797f3481a35905a5861059294815b2210f889.tar.gz | |
services: Factorize define-maybe macro.
* gnu/services/configuration.scm (id): New procedure extracted from
define-configuration.
(define-maybe): New exported procedure, moved from messaging.scm.
* gnu/services/messaging.scm (define-maybe): Remove it.
(id): Move declaration inside define-all-configurations which is now
the only caller procedure.
Signed-off-by: Clément Lassieur <clement@lassieur.org>
Diffstat (limited to 'gnu/services/configuration.scm')
| -rw-r--r-- | gnu/services/configuration.scm | 34 |
1 files changed, 26 insertions, 8 deletions
diff --git a/gnu/services/configuration.scm b/gnu/services/configuration.scm index 2ad3a637a4..400f231b94 100644 --- a/gnu/services/configuration.scm +++ b/gnu/services/configuration.scm @@ -1,5 +1,6 @@ ;;; GNU Guix --- Functional package management for GNU ;;; Copyright © 2015 Andy Wingo <wingo@igalia.com> +;;; Copyright © 2017 Mathieu Othacehe <m.othacehe@gmail.com> ;;; ;;; This file is part of GNU Guix. ;;; @@ -36,6 +37,7 @@ configuration-field-default-value-thunk configuration-field-documentation serialize-configuration + define-maybe define-configuration validate-configuration generate-documentation @@ -85,16 +87,32 @@ (configuration-field-name field) val)))) fields)) +(define (id ctx part . parts) + (let ((part (syntax->datum part))) + (datum->syntax + ctx + (match parts + (() part) + (parts (symbol-append part + (syntax->datum (apply id ctx parts)))))))) + +(define-syntax define-maybe + (lambda (x) + (syntax-case x () + ((_ 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) + (when (stem? val) (serialize-stem field-name val))))))))) + (define-syntax define-configuration (lambda (stx) - (define (id ctx part . parts) - (let ((part (syntax->datum part))) - (datum->syntax - ctx - (match parts - (() part) - (parts (symbol-append part - (syntax->datum (apply id ctx parts)))))))) (syntax-case stx () ((_ stem (field (field-type def) doc) ...) (with-syntax (((field-getter ...) |