file-systems: Move 'string->uuid' to the build side.

* gnu/system/file-systems.scm (%uuid-rx, string->uuid): Move to...
* gnu/build/file-systems.scm (%uuid-rx, string->uuid): ... here.  New
variables.

1 files changed, 5 insertions, 40 deletions

diff --git a/gnu/system/file-systems.scm b/gnu/system/file-systems.scm
index 47a3dbc1e8..d93044ce04 100644
--- a/gnu/system/file-systems.scm
+++ b/gnu/system/file-systems.scm
@@ -1,5 +1,5 @@
 ;;; GNU Guix --- Functional package management for GNU
-;;; Copyright © 2013, 2014, 2015 Ludovic Courtès <ludo@gnu.org>
+;;; Copyright © 2013, 2014, 2015, 2016 Ludovic Courtès <ludo@gnu.org>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -18,13 +18,13 @@
 
 (define-module (gnu system file-systems)
   #:use-module (ice-9 match)
-  #:use-module (ice-9 regex)
   #:use-module (guix gexp)
   #:use-module (guix records)
   #:use-module (guix store)
-  #:use-module (rnrs bytevectors)
-  #:use-module ((gnu build file-systems) #:select (uuid->string))
-  #:re-export (uuid->string)
+  #:use-module ((gnu build file-systems)
+                #:select (string->uuid uuid->string))
+  #:re-export (string->uuid
+               uuid->string)
   #:export (<file-system>
             file-system
             file-system?
@@ -41,7 +41,6 @@
             file-system-dependencies
 
             file-system->spec
-            string->uuid
             uuid
 
             %fuse-control-file-system
@@ -118,40 +117,6 @@ initrd code."
     (($ <file-system> device title mount-point type flags options _ _ check?)
      (list device title mount-point type flags options check?))))
 
-(define %uuid-rx
-  ;; The regexp of a UUID.
-  (make-regexp "^([[:xdigit:]]{8})-([[:xdigit:]]{4})-([[:xdigit:]]{4})-([[:xdigit:]]{4})-([[:xdigit:]]{12})$"))
-
-(define (string->uuid str)
-  "Parse STR as a DCE UUID (see <https://tools.ietf.org/html/rfc4122>) and
-return its contents as a 16-byte bytevector.  Return #f if STR is not a valid
-UUID representation."
-  (and=> (regexp-exec %uuid-rx str)
-         (lambda (match)
-           (letrec-syntax ((hex->number
-                            (syntax-rules ()
-                              ((_ index)
-                               (string->number (match:substring match index)
-                                               16))))
-                           (put!
-                            (syntax-rules ()
-                              ((_ bv index (number len) rest ...)
-                               (begin
-                                 (bytevector-uint-set! bv index number
-                                                       (endianness big) len)
-                                 (put! bv (+ index len) rest ...)))
-                              ((_ bv index)
-                               bv))))
-             (let ((time-low  (hex->number 1))
-                   (time-mid  (hex->number 2))
-                   (time-hi   (hex->number 3))
-                   (clock-seq (hex->number 4))
-                   (node      (hex->number 5))
-                   (uuid      (make-bytevector 16)))
-               (put! uuid 0
-                     (time-low 4) (time-mid 2) (time-hi 2)
-                     (clock-seq 2) (node 6)))))))
-
 (define-syntax uuid
   (lambda (s)
     "Return the bytevector corresponding to the given UUID representation."