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;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2013, 2014, 2015, 2016 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2013 Andreas Enge <andreas@enge.fr>
;;; Copyright © 2013 Nikita Karetnikov <nikita@karetnikov.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 python)
#:use-module (guix store)
#:use-module (guix utils)
#:use-module (guix packages)
#:use-module (guix derivations)
#:use-module (guix search-paths)
#:use-module (guix build-system)
#:use-module (guix build-system gnu)
#:use-module (ice-9 match)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-26)
#:export (%python-build-system-modules
package-with-python2
strip-python2-variant
python-build
python-build-system
pypi-uri))
;; Commentary:
;;
;; Standard build procedure for Python packages using 'setup.py'. This is
;; implemented as an extension of 'gnu-build-system'.
;;
;; Code:
(define* (pypi-uri name version #:optional (extension ".tar.gz"))
"Return a URI string for the Python package hosted on the Python Package
Index (PyPI) corresponding to NAME and VERSION. EXTENSION is the file name
extension, such as '.tar.gz'."
(string-append "https://pypi.python.org/packages/source/"
(string-take name 1) "/" name "/"
name "-" version extension))
(define %python-build-system-modules
;; Build-side modules imported by default.
`((guix build python-build-system)
,@%gnu-build-system-modules))
(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 python old-prefix new-prefix
#:key variant-property)
"Return a procedure of one argument, P. The procedure creates 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.
When VARIANT-PROPERTY is present, it is used as a key to search for
pre-defined variants of this transformation recorded in the 'properties' field
of packages. The property value must be the promise of a package. This is a
convenient way for package writers to force the transformation to use
pre-defined variants."
(define transform
;; Memoize the transformations. Failing to do that, we would build a huge
;; object graph with lots of duplicates, which in turns prevents us from
;; benefiting from memoization in 'package-derivation'.
(memoize ;FIXME: use 'eq?'
(lambda (p)
(let* ((rewrite-if-package
(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)
(transform content)
content)))
(rewrite
(match-lambda
((name content . rest)
(append (list name (rewrite-if-package content)) rest)))))
(cond
;; If VARIANT-PROPERTY is present, use that.
((and variant-property
(assoc-ref (package-properties p) variant-property))
=> force)
;; Otherwise build the new package object graph.
((eq? (package-build-system p) python-build-system)
(package
(inherit p)
(location (package-location p))
(name (let ((name (package-name p)))
(string-append new-prefix
(if (string-prefix? old-prefix name)
(substring name
(string-length old-prefix))
name))))
(arguments
(let ((python (if (promise? python)
(force python)
python)))
(ensure-keyword-arguments (package-arguments p)
`(#:python ,python))))
(inputs (map rewrite (package-inputs p)))
(propagated-inputs (map rewrite (package-propagated-inputs p)))
(native-inputs (map rewrite (package-native-inputs p)))))
(else
p))))))
transform)
(define package-with-python2
;; Note: delay call to 'default-python2' until after the 'arguments' field
;; of packages is accessed to avoid a circular dependency when evaluating
;; the top-level of (gnu packages python).
(package-with-explicit-python (delay (default-python2))
"python-" "python2-"
#:variant-property 'python2-variant))
(define (strip-python2-variant p)
"Remove the 'python2-variant' property from P."
(package
(inherit p)
(properties (alist-delete 'python2-variant (package-properties p)))))
(define* (lower name
#:key source inputs native-inputs outputs system target
(python (default-python))
#:allow-other-keys
#:rest arguments)
"Return a bag for NAME."
(define private-keywords
'(#:source #:target #:python #:inputs #:native-inputs))
(and (not target) ;XXX: no cross-compilation
(bag
(name name)
(system system)
(host-inputs `(,@(if source
`(("source" ,source))
'())
,@inputs
;; Keep the standard inputs of 'gnu-build-system'.
,@(standard-packages)))
(build-inputs `(("python" ,python)
,@native-inputs))
(outputs outputs)
(build python-build)
(arguments (strip-keyword-arguments private-keywords arguments)))))
(define* (python-build store name inputs
#:key
(tests? #t)
(test-target "test")
(configure-flags ''())
(phases '(@ (guix build python-build-system)
%standard-phases))
(outputs '("out"))
(search-paths '())
(system (%current-system))
(guile #f)
(imported-modules %python-build-system-modules)
(modules '((guix build python-build-system)
(guix build utils))))
"Build SOURCE using PYTHON, and with INPUTS. This assumes that SOURCE
provides a 'setup.py' file as its build system."
(define builder
`(begin
(use-modules ,@modules)
(python-build #:name ,name
#:source ,(match (assoc-ref inputs "source")
(((? derivation? source))
(derivation->output-path source))
((source)
source)
(source
source))
#:configure-flags ,configure-flags
#:system ,system
#:test-target ,test-target
#:tests? ,tests?
#:phases ,phases
#:outputs %outputs
#:search-paths ',(map search-path-specification->sexp
search-paths)
#:inputs %build-inputs)))
(define guile-for-build
(match guile
((? package?)
(package-derivation store guile system #:graft? #f))
(#f ; the default
(let* ((distro (resolve-interface '(gnu packages commencement)))
(guile (module-ref distro 'guile-final)))
(package-derivation store guile system #:graft? #f)))))
(build-expression->derivation store name builder
#:inputs inputs
#: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")
(lower lower)))
;;; python.scm ends here
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