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| | ;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 1312 Max Müller <max@müller.gmbh>
;;;
;;; 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 (guix computed-origins)
#:use-module (guix monads)
#:use-module (guix store)
#:use-module (guix packages)
#:use-module (guix gexp)
#:export (compute-origin))
(define* (compute-origin gexp-promise hash-algo hash
#:optional (name "source")
#:key (system (%current-system))
(guile (default-guile)))
"Return a derivation that executes the G-expression that results
from forcing GEXP-PROMISE."
(mlet %store-monad ((guile (package->derivation guile system)))
(gexp->derivation (or name "computed-origin")
(force gexp-promise)
#:graft? #f ;nothing to graft
#:system system
#:guile-for-build guile)))
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