04/05: search-paths: Add 'set-search-paths'.

[Ludovic Courtès]

civodul pushed a commit to branch master
in repository guix.

commit 54fd5ad0a5da92a35056a72021174234913fe10f
Author: Ludovic Courtès <address@hidden>
Date:   Wed May 2 19:50:45 2018 +0200

    search-paths: Add 'set-search-paths'.
    
    * guix/search-paths.scm (set-search-paths): New procedure.
---
 guix/search-paths.scm | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/guix/search-paths.scm b/guix/search-paths.scm
index 4bf0e44..002e634 100644
--- a/guix/search-paths.scm
+++ b/guix/search-paths.scm
@@ -1,5 +1,5 @@
 ;;; GNU Guix --- Functional package management for GNU
-;;; Copyright © 2013, 2014, 2015, 2017 Ludovic Courtès <address@hidden>
+;;; Copyright © 2013, 2014, 2015, 2017, 2018 Ludovic Courtès <address@hidden>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -38,7 +38,8 @@
             string-tokenize*
             evaluate-search-paths
             environment-variable-definition
-            search-path-definition))
+            search-path-definition
+            set-search-paths))
 
 ;;; Commentary:
 ;;;
@@ -196,4 +197,14 @@ prefix/suffix."
                                       #:kind kind
                                       #:separator separator))))
 
+(define* (set-search-paths search-paths directories
+                           #:key (setenv setenv))
+  "Set the search path environment variables specified by SEARCH-PATHS for the
+given directories."
+  (for-each (match-lambda
+              ((spec . value)
+               (setenv (search-path-specification-variable spec)
+                       value)))
+            (evaluate-search-paths search-paths directories)))
+
 ;;; search-paths.scm ends here