From 21b07b07a973adcf94046f5bec2338c1207c35f4 Mon Sep 17 00:00:00 2001
From: Christopher Baines <mail@cbaines.net>
Date: Sun, 24 Mar 2019 10:49:49 +0000
Subject: [PATCH] Extract out deduplicate-strings to the utils module

---
 guix-data-service/model/derivation.scm | 13 -------------
 guix-data-service/model/utils.scm      | 16 +++++++++++++++-
 2 files changed, 15 insertions(+), 14 deletions(-)

diff --git a/guix-data-service/model/derivation.scm b/guix-data-service/model/derivation.scm
index 7a710de..07b8ee6 100644
--- a/guix-data-service/model/derivation.scm
+++ b/guix-data-service/model/derivation.scm
@@ -519,19 +519,6 @@ ORDER BY derivations.system DESC,
 
   (exec-query conn query))
 
-(define (deduplicate-strings strings)
-  (pair-fold
-   (lambda (pair result)
-     (if (null? (cdr pair))
-         (cons (first pair) result)
-         (if (string=? (first pair) (second pair))
-             result
-             (cons (first pair) result))))
-   '()
-   (sort strings
-         (lambda (a b)
-           (string<? a b)))))
-
 (define (deduplicate-derivations derivations)
   (define sorted-derivations
     (sort derivations
diff --git a/guix-data-service/model/utils.scm b/guix-data-service/model/utils.scm
index 8a85e2b..eab3b98 100644
--- a/guix-data-service/model/utils.scm
+++ b/guix-data-service/model/utils.scm
@@ -5,7 +5,8 @@
   #:export (quote-string
             value->quoted-string-or-null
             exec-query->vhash
-            two-lists->vhash))
+            two-lists->vhash
+            deduplicate-strings))
 
 (define (quote-string s)
   (string-append "'" s "'"))
@@ -29,3 +30,16 @@
         vlist-null
         l1
         l2))
+
+(define (deduplicate-strings strings)
+  (pair-fold
+   (lambda (pair result)
+     (if (null? (cdr pair))
+         (cons (first pair) result)
+         (if (string=? (first pair) (second pair))
+             result
+             (cons (first pair) result))))
+   '()
+   (sort strings
+         (lambda (a b)
+           (string<? a b)))))