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;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2013, 2014 Ludovic Courtès <>
;;; Copyright © 2013 Andreas Enge <>
;;; Copyright © 2013 Nikita Karetnikov <>
;;; 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
;;; 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 <>.
(define-module (guix build-system python)
#:use-module (guix store)
#:use-module (guix utils)
#:use-module (guix packages)
#:use-module (guix derivations)
#:use-module (guix build-system)
#:use-module (guix build-system gnu)
#:use-module (ice-9 match)
#:use-module (srfi srfi-26)
#:export (package-with-python2
;; Commentary:
;; Standard build procedure for Python packages using ''. This is
;; implemented as an extension of 'gnu-build-system'.
;; Code:
(define (default-python)
"Return the default Python package."
;; Lazily resolve the binding to avoid a circular dependency.
(let ((python (resolve-interface '(gnu packages python))))
(module-ref python 'python-wrapper)))
(define (default-python2)
"Return the default Python 2 package."
(let ((python (resolve-interface '(gnu packages python))))
(module-ref python 'python-2)))
(define (package-with-explicit-python p python old-prefix new-prefix)
"Create a package with the same fields as P, which is assumed to use
PYTHON-BUILD-SYSTEM, such that it is compiled with PYTHON instead. The
inputs are changed recursively accordingly. If the name of P starts with
OLD-PREFIX, this is replaced by NEW-PREFIX; otherwise, NEW-PREFIX is
prepended to the name."
(let* ((build-system (package-build-system p))
(lambda (content)
;; CONTENT may be a file name, in which case it is returned, or a
;; package, which is rewritten with the new PYTHON and NEW-PREFIX.
(if (package? content)
(package-with-explicit-python content python
old-prefix new-prefix)
((name content . rest)
(append (list name (rewrite-if-package content)) rest)))))
(package (inherit p)
(let ((name (package-name p)))
(if (eq? build-system python-build-system)
(string-append new-prefix
(if (string-prefix? old-prefix name)
(substring name (string-length old-prefix))
(let ((arguments (package-arguments p)))
(if (eq? build-system python-build-system)
(if (member #:python arguments)
(substitute-keyword-arguments arguments ((#:python p) python))
(append arguments `(#:python ,python)))
(map rewrite (package-inputs p)))
(map rewrite (package-native-inputs p))))))
(define package-with-python2
(cut package-with-explicit-python <> (default-python2) "python-" "python2-"))
(define* (python-build store name source inputs
(python (default-python))
(tests? #t)
(test-target "test")
(configure-flags ''())
(phases '(@ (guix build python-build-system)
(outputs '("out"))
(search-paths '())
(system (%current-system))
(guile #f)
(imported-modules '((guix build python-build-system)
(guix build gnu-build-system)
(guix build utils)))
(modules '((guix build python-build-system)
(guix build utils))))
"Build SOURCE using PYTHON, and with INPUTS. This assumes that SOURCE
provides a '' file as its build system."
(define python-search-paths
(append (package-native-search-paths python)
(define builder
(use-modules ,@modules)
(python-build #:name ,name
#:source ,(if (derivation? source)
(derivation->output-path source)
#:configure-flags ,configure-flags
#:system ,system
#:test-target ,test-target
#:tests? ,tests?
#:phases ,phases
#:outputs %outputs
#:search-paths ',(map search-path-specification->sexp
(append python-search-paths
#:inputs %build-inputs)))
(define guile-for-build
(match guile
((? package?)
(package-derivation store guile system))
((and (? string?) (? derivation-path?))
(#f ; the default
(let* ((distro (resolve-interface '(gnu packages commencement)))
(guile (module-ref distro 'guile-final)))
(package-derivation store guile system)))))
(let ((python (package-derivation store python system)))
(build-expression->derivation store name builder
`(,@(if source
`(("source" ,source))
("python" ,python)
;; Keep the standard inputs of
;; 'gnu-build-system'.
,@(standard-inputs system))
#:system system
#:modules imported-modules
#:outputs outputs
#:guile-for-build guile-for-build)))
(define python-build-system
(build-system (name 'python)
(description "The standard Python build system")
(build python-build)))
;;; python.scm ends here