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+#!@GUILE@ -s
+-*- scheme -*-
+!#
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2013 Mark H Weaver <mhw@netris.org>
+;;;
+;;; This file is part of GNU Guix.
+;;;
+;;; GNU Guix is free software; you can redistribute it and/or modify it
+;;; under the terms of the GNU General Public License as published by
+;;; the Free Software Foundation; either version 3 of the License, or (at
+;;; your option) any later version.
+;;;
+;;; GNU Guix is distributed in the hope that it will be useful, but
+;;; WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+;;; GNU General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU General Public License
+;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
+
+;; IMPORTANT: We must avoid loading any modules from Guix here,
+;; because we need to adjust the guile load paths first.
+;; It's okay to import modules from core Guile though.
+(use-modules (ice-9 regex))
+
+(let ()
+ (define-syntax-rule (push! elt v) (set! v (cons elt v)))
+
+ (define config-lookup
+ (let ((config '(("prefix" . "@prefix@")
+ ("datarootdir" . "@datarootdir@")
+ ("guilemoduledir" . "@guilemoduledir@")))
+ (var-ref-regexp (make-regexp "\\$\\{([a-z]+)\\}")))
+ (define (expand-var-ref match)
+ (lookup (match:substring match 1)))
+ (define (expand str)
+ (regexp-substitute/global #f var-ref-regexp str
+ 'pre expand-var-ref 'post))
+ (define (lookup name)
+ (expand (assoc-ref config name)))
+ lookup))
+
+ (define (maybe-augment-load-paths!)
+ (unless (getenv "GUIX_UNINSTALLED")
+ (let ((module-dir (config-lookup "guilemoduledir")))
+ (push! module-dir %load-path)
+ (push! module-dir %load-compiled-path))))
+
+ (define (run-guix-main)
+ (let ((guix-main (module-ref (resolve-interface '(guix ui))
+ 'guix-main)))
+ (apply guix-main (command-line))))
+
+ (maybe-augment-load-paths!)
+ (run-guix-main))