From 8eb8048432f57254e07d48ab17890cbeca50e96f Mon Sep 17 00:00:00 2001
From: Mark H Weaver <mhw@netris.org>
Date: Wed, 31 Dec 2014 03:47:40 -0500
Subject: Move 'nix-system->gnu-triplet' to (guix utils) and export it.

* gnu/packages/commencement.scm (nix-system->gnu-triplet): Move to...
* guix/utils.scm (nix-system->gnu-triplet): ... here.  Fix docstring typo.
---
 guix/utils.scm | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

(limited to 'guix/utils.scm')

diff --git a/guix/utils.scm b/guix/utils.scm
index d0d2e8a3d4..7ac586b0aa 100644
--- a/guix/utils.scm
+++ b/guix/utils.scm
@@ -61,6 +61,7 @@
             location-column
             source-properties->location
 
+            nix-system->gnu-triplet
             gnu-triplet->nix-system
             %current-system
             %current-target-system
@@ -476,6 +477,19 @@ previous value of the keyword argument."
          (()
           (reverse before)))))))
 
+(define* (nix-system->gnu-triplet
+          #:optional (system (%current-system)) (vendor "unknown"))
+  "Return a guess of the GNU triplet corresponding to Nix system
+identifier SYSTEM."
+  (let* ((dash (string-index system #\-))
+         (arch (substring system 0 dash))
+         (os   (substring system (+ 1 dash))))
+    (string-append arch
+                   "-" vendor "-"
+                   (if (string=? os "linux")
+                       "linux-gnu"
+                       os))))
+
 (define (gnu-triplet->nix-system triplet)
   "Return the Nix system type corresponding to TRIPLET, a GNU triplet as
 returned by `config.guess'."
-- 
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