From 07c8a98c3b45dca9fd36af7c4a300d3af58734dd Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ludovic=20Court=C3=A8s?= <ludo@gnu.org>
Date: Wed, 15 Jun 2016 23:08:05 +0200
Subject: gexp: Move 'current-source-directory' to (guix utils).

* guix/gexp.scm (extract-directory, current-source-directory): Move to...
* guix/utils.scm (extract-directory, current-source-directory):
... here.  New procedures.
---
 guix/utils.scm | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

(limited to 'guix/utils.scm')

diff --git a/guix/utils.scm b/guix/utils.scm
index 2d8bfd84b0..19fd0b0844 100644
--- a/guix/utils.scm
+++ b/guix/utils.scm
@@ -53,6 +53,8 @@
             substitute-keyword-arguments
             ensure-keyword-arguments
 
+            current-source-directory
+
             <location>
             location
             location?
@@ -700,6 +702,19 @@ output port, and PROC's result is returned."
 ;;; Source location.
 ;;;
 
+(define (extract-directory properties)
+  "Extract the directory name from source location PROPERTIES."
+  (match (assq 'filename properties)
+    (('filename . (? string? file-name))
+     (dirname file-name))
+    (_
+     #f)))
+
+(define-syntax-rule (current-source-directory)
+  "Expand to the directory of the current source file or #f if it could not
+be determined."
+  (extract-directory (current-source-location)))
+
 ;; A source location.
 (define-record-type <location>
   (make-location file line column)
-- 
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