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| | ;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2014, 2016, 2017 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/>.
(define-module (build-self)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-19)
#:use-module (ice-9 match)
#:export (build))
;;; Commentary:
;;;
;;; When loaded, this module returns a monadic procedure of at least one
;;; argument: the source tree to build. It returns a derivation that
;;; builds it.
;;;
;;; This file uses modules provided by the already-installed Guix. Those
;;; modules may be arbitrarily old compared to the version we want to
;;; build. Because of that, it must rely on the smallest set of features
;;; that are likely to be provided by the (guix) and (gnu) modules, and by
;;; Guile itself, forever and ever.
;;;
;;; Code:
;; Use our very own Guix modules.
(eval-when (compile load eval)
;; Ignore any available .go, and force recompilation. This is because our
;; checkout in the store has mtime set to the epoch, and thus .go files look
;; newer, even though they may not correspond.
(set! %fresh-auto-compile #t)
(and=> (assoc-ref (current-source-location) 'filename)
(lambda (file)
(let ((dir (string-append (dirname file) "/../..")))
(set! %load-path (cons dir %load-path))))))
(define (date-version-string)
"Return the current date and hour in UTC timezone, for use as a poor
person's version identifier."
;; XXX: Last resort when the Git commit id is missing.
(date->string (current-date 0) "~Y~m~d.~H"))
;; The procedure below is our return value.
(define* (build source
#:key verbose? (version (date-version-string))
#:allow-other-keys
#:rest rest)
"Return a derivation that unpacks SOURCE into STORE and compiles Scheme
files."
;; FIXME: Closures in (guix scripts pull) have already cached old values of
;; (guix …), so they keep referring to the "old" world, with different
;; record types than the one we get after reloading (because record types
;; are "generative".)
(let ((reload-guix (module-ref (resolve-interface '(guix self))
'reload-guix)))
(reload-guix)) ;cross fingers!
(let ((guix-derivation (module-ref (resolve-interface '(guix self))
'guix-derivation)))
(guix-derivation source version)))
;; This file is loaded by 'guix pull'; return it the build procedure.
build
;;; build-self.scm ends here
|