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;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2012, 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/>.
(define-module (guix build-system)
#:use-module (guix records)
#:use-module (ice-9 match)
#:export (build-system
build-system?
build-system-name
build-system-description
build-system-lower
bag
bag?
bag-name
bag-system
bag-target
bag-build-inputs
bag-host-inputs
bag-target-inputs
bag-outputs
bag-arguments
bag-build
make-bag))
(define-record-type* <build-system> build-system make-build-system
build-system?
(name build-system-name) ; symbol
(description build-system-description) ; short description
(lower build-system-lower)) ; args ... -> bags
;; "Bags" are low-level representations of "packages". The system and target
;; of a bag is fixed when it's created. This is because build systems may
;; choose inputs as a function of the system and target.
(define-record-type* <bag> bag %make-bag
bag?
(name bag-name) ;string
(system bag-system) ;string
(target bag-target ;string | #f
(default #f))
;; Here we use build/host/target in the sense of the GNU tool chain (info
;; "(autoconf) Specifying Target Triplets").
(build-inputs bag-build-inputs ;list of packages
(default '()))
(host-inputs bag-host-inputs ;list of packages
(default '()))
;; "Target inputs" are packages that are built natively, but that are used
;; by target programs in a cross-compilation environment. Thus, they act
;; like 'inputs' as far as search paths are concerned. The only example of
;; that is the cross-libc: it is an input of 'cross-gcc', thus built
;; natively; yet, we want it to be considered as a target input for the
;; purposes of $CPATH, $LIBRARY_PATH, etc.
(target-inputs bag-target-inputs
(default '()))
(outputs bag-outputs ;list of strings
(default '("out")))
(arguments bag-arguments ;list
(default '()))
(build bag-build)) ;bag -> derivation
(define* (make-bag build-system name
#:key source (inputs '()) (native-inputs '())
(outputs '()) (arguments '())
system target)
"Ask BUILD-SYSTEM to return a 'bag' for NAME, with the given SOURCE,
INPUTS, NATIVE-INPUTS, OUTPUTS, and additional ARGUMENTS. If TARGET is not
#f, it must be a string with the GNU triplet of a cross-compilation target.
This is the mechanism by which a package is \"lowered\" to a bag, which is the
intermediate representation just above derivations."
(match build-system
(($ <build-system> _ description lower)
(apply lower name
#:system system
#:source source
#:inputs inputs
#:native-inputs native-inputs
#:outputs outputs
#:target target
arguments))))
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