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+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2013 Ludovic Courtès <ludo@gnu.org>
+;;; 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 python-build-system)
+ #:use-module ((guix build gnu-build-system)
+ #:renamer (symbol-prefix-proc 'gnu:))
+ #:use-module (guix build utils)
+ #:use-module (ice-9 match)
+ #:use-module (ice-9 ftw)
+ #:use-module (srfi srfi-1)
+ #:use-module (srfi srfi-26)
+ #:export (%standard-phases
+ python-build))
+
+;; Commentary:
+;;
+;; Builder-side code of the standard Python package build procedure.
+;;
+;; Code:
+
+(define* (install #:key outputs (configure-flags '())
+ #:allow-other-keys)
+ "Install a given Python package."
+ (let ((out (assoc-ref outputs "out")))
+ (if (file-exists? "setup.py")
+ (let ((args `("setup.py" "install" ,(string-append "--prefix=" out)
+ ,@configure-flags)))
+ (format #t "running 'python' with arguments ~s~%" args)
+ (zero? (apply system* "python" args)))
+ (error "no setup.py found"))))
+
+(define* (wrap #:key outputs python-version #:allow-other-keys)
+ (define (list-of-files dir)
+ (map (cut string-append dir "/" <>)
+ (or (scandir dir (lambda (f)
+ (let ((s (stat (string-append dir "/" f))))
+ (eq? 'regular (stat:type s)))))
+ '())))
+
+ (define bindirs
+ (append-map (match-lambda
+ ((_ . dir)
+ (list (string-append dir "/bin")
+ (string-append dir "/sbin"))))
+ outputs))
+
+ (let* ((out (assoc-ref outputs "out"))
+ (var `("PYTHONPATH" prefix
+ ,(cons (string-append out "/lib/python"
+ python-version "/site-packages")
+ (search-path-as-string->list
+ (or (getenv "PYTHONPATH") ""))))))
+ (for-each (lambda (dir)
+ (let ((files (list-of-files dir)))
+ (for-each (cut wrap-program <> var)
+ files)))
+ bindirs)))
+
+(define %standard-phases
+ ;; 'configure' and 'build' phases are not needed. Everything is done during
+ ;; 'install'.
+ (alist-cons-after
+ 'install 'wrap
+ wrap
+ (alist-replace 'install install
+ (alist-delete 'configure
+ (alist-delete 'build
+ gnu:%standard-phases)))))
+
+(define* (python-build #:key inputs (phases %standard-phases)
+ #:allow-other-keys #:rest args)
+ "Build the given Python package, applying all of PHASES in order."
+ (apply gnu:gnu-build #:inputs inputs #:phases phases args))
+
+;;; python-build-system.scm ends here