guix-devel/build-aux/check-available-binaries.scm

;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2013, 2014 Ludovic Courtès <ludo@gnu.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/>.

;;;
;;; Check whether important binaries are available at hydra.gnu.org.
;;;

(use-modules (guix store)
             (guix packages)
             (guix derivations)
             (gnu packages emacs)
             (gnu packages make-bootstrap)
             (srfi srfi-1)
             (srfi srfi-26))

(define %supported-systems
  '("x86_64-linux" "i686-linux"))

(let* ((store  (open-connection))
       (native (append-map (lambda (system)
                             (map (cut package-derivation store <> system)
                                  (list %bootstrap-tarballs emacs)))
                           %supported-systems))
       (cross  (map (cut package-cross-derivation store
                         %bootstrap-tarballs <>)
                    '("mips64el-linux-gnuabi64")))
       (total  (append native cross)))
  (define (warn proc)
    (lambda (drv)
      (or (proc drv)
          (begin
            (format (current-error-port) "~a is not substitutable~%"
                    drv)
            #f))))

  (set-build-options store #:use-substitutes? #t)
  (let ((result (every (compose (warn (cut has-substitutes? store <>))
                                derivation->output-path)
                       total)))
    (when result
      (format (current-error-port) "~a packages found substitutable~%"
              (length total)))
    (exit result)))