*gnu/system/shadow.scm (find-duplicates): New variable.
(assert-unique-account-names, assert-unique-group-names): New variables.
(account-activation): Use them here.
---
gnu/system/shadow.scm | 35 +++++++++++++++++++++++++++++++++++
1 file changed, 35 insertions(+)
diff --git a/gnu/system/shadow.scm b/gnu/system/shadow.scm
index a69339bc07..3a5ea4dc70 100644
--- a/gnu/system/shadow.scm
+++ b/gnu/system/shadow.scm
@@ -34,6 +34,7 @@
#:use-module ((gnu packages admin)
#:select (shadow))
#:use-module (gnu packages bash)
+ #:use-module (ice-9 match)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-26)
#:use-module (srfi srfi-34)
@@ -222,6 +223,38 @@ for a colorful Guile experience.\\n\\n\"))))\n"))
(rename-file ".nanorc" ".config/nano/nanorc"))
#t))))
+(define (find-duplicates list =)
+ (match list
+ ('() '())
+ ((first . rest)
+ (if (member first rest =) ; (srfi srfi-1) member
+ (cons first (find-duplicates rest =))
+ (find-duplicates rest =)))))
+
+(define (assert-unique-account-names users)
+ (for-each
+ (lambda (account)
+ (raise (condition
+ (&message
+ (message
+ (format #f (G_ "account with name '~a' found twice.")
+ (user-account-name account)))))))
+ (find-duplicates users (lambda (alice bob)
+ (string=? (user-account-name alice)
+ (user-account-name bob))))))
+
+(define (assert-unique-group-names groups)
+ (for-each
+ (lambda (group)
+ (raise (condition
+ (&message
+ (message
+ (format #f (G_ "group with name '~a' found twice.")
+ (user-group-name group)))))))
+ (find-duplicates groups (lambda (red blue)
+ (string=? (user-group-name red)
+ (user-group-name blue))))))
+
(define (assert-valid-users/groups users groups)
"Raise an error if USERS refer to groups not listed in GROUPS."
(let ((groups (list->set (map user-group-name groups))))
@@ -292,6 +325,8 @@ group."
(define group-specs
(map user-group->gexp groups))
+ (assert-unique-account-names accounts)
+ (assert-unique-group-names groups)
(assert-valid-users/groups accounts groups)
;; Add users and user groups.
--
2.29.2
