utils: Remove Nixpkgs helpers.

* guix/config.scm.in (%nixpkgs): Remove.
* guix/utils.scm (%nixpkgs-directory, nixpkgs-derivation,
  nixpkgs-derivation*): Remove.
* test-env.in: Export 'NIXPKGS'.
* tests/derivations.scm (%coreutils): Remove use of
  'nixpkgs-derivation'.
* tests/snix.scm (%nixpkgs-directory): New variable.
  Adjust users accordingly.

2 files changed, 1 insertions, 45 deletions

diff --git a/guix/config.scm.in b/guix/config.scm.in
index eaadae9618..764e466bc5 100644
--- a/guix/config.scm.in
+++ b/guix/config.scm.in
@@ -1,5 +1,5 @@
 ;;; GNU Guix --- Functional package management for GNU
-;;; Copyright © 2012, 2013, 2014 Ludovic Courtès <ludo@gnu.org>
+;;; Copyright © 2012, 2013, 2014, 2015 Ludovic Courtès <ludo@gnu.org>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -27,7 +27,6 @@
             %guix-register-program
             %system
             %libgcrypt
-            %nixpkgs
             %nix-instantiate
             %gzip
             %bzip2
@@ -73,11 +72,6 @@
 (define %libgcrypt
   "@LIBGCRYPT@")
 
-(define %nixpkgs
-  (if (string=? "@NIXPKGS@" "")
-      #f
-      "@NIXPKGS@"))
-
 (define %nix-instantiate
   "@NIX_INSTANTIATE@")
 
diff --git a/guix/utils.scm b/guix/utils.scm
index b6df5d9cc9..1d4b2ff9b0 100644
--- a/guix/utils.scm
+++ b/guix/utils.scm
@@ -44,10 +44,6 @@
   #:export (bytevector->base16-string
             base16-string->bytevector
 
-            %nixpkgs-directory
-            nixpkgs-derivation
-            nixpkgs-derivation*
-
             compile-time-value
             fcntl-flock
             memoize
@@ -316,40 +312,6 @@ a list of command-line arguments passed to the compression program."
 
 
 ;;;
-;;; Nixpkgs.
-;;;
-
-(define %nixpkgs-directory
-  (make-parameter
-   ;; Capture the build-time value of $NIXPKGS.
-   (or %nixpkgs
-       (and=> (getenv "NIXPKGS")
-              (lambda (val)
-                ;; Bail out when passed an empty string, otherwise
-                ;; `nix-instantiate' will sit there and attempt to read
-                ;; from its standard input.
-                (if (string=? val "")
-                    #f
-                    val))))))
-
-(define* (nixpkgs-derivation attribute #:optional (system (%current-system)))
-  "Return the derivation path of ATTRIBUTE in Nixpkgs."
-  (let* ((p (open-pipe* OPEN_READ (or (getenv "NIX_INSTANTIATE")
-                                      %nix-instantiate)
-                        "-A" attribute (%nixpkgs-directory)
-                        "--argstr" "system" system))
-         (l (read-line p))
-         (s (close-pipe p)))
-    (and (zero? (status:exit-val s))
-         (not (eof-object? l))
-         l)))
-
-(define-syntax-rule (nixpkgs-derivation* attribute)
-  "Evaluate the given Nixpkgs derivation at compile-time."
-  (compile-time-value (nixpkgs-derivation attribute)))
-
-
-;;;
 ;;; Advisory file locking.
 ;;;