search-paths: 'evaluate-search-paths' now returns spec/value pairs.

* guix/search-paths.scm (evaluate-search-paths): Return
  specification/value pairs instead of variable/value pairs.
* guix/scripts/package.scm (search-path-environment-variables): Adjust
  accordingly.  Pass #:separator to 'environment-variable-definition'.

1 files changed, 5 insertions, 4 deletions

diff --git a/guix/search-paths.scm b/guix/search-paths.scm
index 7957c88241..154e508d5b 100644
--- a/guix/search-paths.scm
+++ b/guix/search-paths.scm
@@ -117,12 +117,13 @@ like `string-tokenize', but SEPARATOR is a string."
 (define* (evaluate-search-paths search-paths directory
                                 #:optional (getenv (const #f)))
   "Evaluate SEARCH-PATHS, a list of search-path specifications, for DIRECTORY,
-and return a list of variable/value pairs.  Use GETENV to determine the
+and return a list of specification/value pairs.  Use GETENV to determine the
 current settings and report only settings not already effective."
   (define search-path-definition
     (match-lambda
-      (($ <search-path-specification> variable files separator
-                                      type pattern)
+      ((and spec
+            ($ <search-path-specification> variable files separator
+                                           type pattern))
        (let* ((values (or (and=> (getenv variable)
                                  (cut string-tokenize* <> separator))
                           '()))
@@ -141,7 +142,7 @@ current settings and report only settings not already effective."
                                             #:pattern pattern))))
          (if (every (cut member <> values) path)
              #f                         ;VARIABLE is already set appropriately
-             (cons variable (string-join path separator)))))))
+             (cons spec (string-join path separator)))))))
 
   (filter-map search-path-definition search-paths))