272 lines
12 KiB
Scheme
272 lines
12 KiB
Scheme
;;; GNU Guix --- Functional package management for GNU
|
|
;;; Copyright © 2013, 2015, 2016, 2018 Ludovic Courtès <ludo@gnu.org>
|
|
;;; Copyright © 2013 Andreas Enge <andreas@enge.fr>
|
|
;;; Copyright © 2013 Nikita Karetnikov <nikita@karetnikov.org>
|
|
;;; Copyright © 2015, 2018 Mark H Weaver <mhw@netris.org>
|
|
;;; Copyright © 2016 Hartmut Goebel <h.goebel@crazy-compilers.com>
|
|
;;; Copyright © 2018 Ricardo Wurmus <rekado@elephly.net>
|
|
;;; Copyright © 2018 Arun Isaac <arunisaac@systemreboot.net>
|
|
;;;
|
|
;;; 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) #:prefix 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
|
|
add-installed-pythonpath
|
|
site-packages
|
|
python-build))
|
|
|
|
;; Commentary:
|
|
;;
|
|
;; Builder-side code of the standard Python package build procedure.
|
|
;;
|
|
;;
|
|
;; Backgound about the Python installation methods
|
|
;;
|
|
;; In Python there are different ways to install packages: distutils,
|
|
;; setuptools, easy_install and pip. All of these are sharing the file
|
|
;; setup.py, introduced with distutils in Python 2.0. The setup.py file can be
|
|
;; considered as a kind of Makefile accepting targets (or commands) like
|
|
;; "build" and "install". As of autumn 2016 the recommended way to install
|
|
;; Python packages is using pip.
|
|
;;
|
|
;; For both distutils and setuptools, running "python setup.py install" is the
|
|
;; way to install Python packages. With distutils the "install" command
|
|
;; basically copies all packages into <prefix>/lib/pythonX.Y/site-packages.
|
|
;;
|
|
;; Some time later "setuptools" was established to enhance distutils. To use
|
|
;; setuptools, the developer imports setuptools in setup.py. When importing
|
|
;; setuptools, the original "install" command gets overwritten by setuptools'
|
|
;; "install" command.
|
|
;;
|
|
;; The command-line tools easy_install and pip are both capable of finding and
|
|
;; downloading the package source from PyPI (the Python Package Index). Both
|
|
;; of them import setuptools and execute the "setup.py" file under their
|
|
;; control. Thus the "setup.py" behaves as if the developer had imported
|
|
;; setuptools within setup.py - even is still using only distutils.
|
|
;;
|
|
;; Setuptools' "install" command (to be more precise: the "easy_install"
|
|
;; command which is called by "install") will put the path of the currently
|
|
;; installed version of each package and it's dependencies (as declared in
|
|
;; setup.py) into an "easy-install.pth" file. In Guix each packages gets its
|
|
;; own "site-packages" directory and thus an "easy-install.pth" of its own.
|
|
;; To avoid conflicts, the python build system renames the file to
|
|
;; <packagename>.pth in the phase rename-pth-file. To ensure that Python will
|
|
;; process the .pth file, easy_install also creates a basic "site.py" in each
|
|
;; "site-packages" directory. The file is the same for all packages, thus
|
|
;; there is no need to rename it. For more information about .pth files and
|
|
;; the site module, please refere to
|
|
;; https://docs.python.org/3/library/site.html.
|
|
;;
|
|
;; The .pth files contain the file-system paths (pointing to the store) of all
|
|
;; dependencies. So the dependency is hidden in the .pth file but is not
|
|
;; visible in the file-system. Now if packages A and B both required packages
|
|
;; P, but in different versions, Guix will not detect this when installing
|
|
;; both A and B to a profile. (For details and example see
|
|
;; https://lists.gnu.org/archive/html/guix-devel/2016-10/msg01233.html.)
|
|
;;
|
|
;; Pip behaves a bit different then easy_install: it always executes
|
|
;; "setup.py" with the option "--single-version-externally-managed" set. This
|
|
;; makes setuptools' "install" command run the original "install" command
|
|
;; instead of the "easy_install" command, so no .pth file (and no site.py)
|
|
;; will be created. The "site-packages" directory only contains the package
|
|
;; and the related .egg-info directory.
|
|
;;
|
|
;; This is exactly what we need for Guix and this is what we mimic in the
|
|
;; install phase below.
|
|
;;
|
|
;; As a draw back, the magic of the .pth file of linking to the other required
|
|
;; packages is gone and these packages have now to be declared as
|
|
;; "propagated-inputs".
|
|
;;
|
|
;; Note: Importing setuptools also adds two sub-commands: "install_egg_info"
|
|
;; and "install_scripts". These sub-commands are executed even if
|
|
;; "--single-version-externally-managed" is set, thus the .egg-info directory
|
|
;; and the scripts defined in entry-points will always be created.
|
|
|
|
|
|
(define setuptools-shim
|
|
;; Run setup.py with "setuptools" being imported, which will patch
|
|
;; "distutils". This is needed for packages using "distutils" instead of
|
|
;; "setuptools" since the former does not understand the
|
|
;; "--single-version-externally-managed" flag.
|
|
;; Python code taken from pip 9.0.1 pip/utils/setuptools_build.py
|
|
(string-append
|
|
"import setuptools, tokenize;__file__='setup.py';"
|
|
"f=getattr(tokenize, 'open', open)(__file__);"
|
|
"code=f.read().replace('\\r\\n', '\\n');"
|
|
"f.close();"
|
|
"exec(compile(code, __file__, 'exec'))"))
|
|
|
|
(define (call-setuppy command params use-setuptools?)
|
|
(if (file-exists? "setup.py")
|
|
(begin
|
|
(format #t "running \"python setup.py\" with command ~s and parameters ~s~%"
|
|
command params)
|
|
(if use-setuptools?
|
|
(apply invoke "python" "-c" setuptools-shim
|
|
command params)
|
|
(apply invoke "python" "./setup.py" command params)))
|
|
(error "no setup.py found")))
|
|
|
|
(define* (build #:key use-setuptools? #:allow-other-keys)
|
|
"Build a given Python package."
|
|
(call-setuppy "build" '() use-setuptools?)
|
|
#t)
|
|
|
|
(define* (check #:key tests? test-target use-setuptools? #:allow-other-keys)
|
|
"Run the test suite of a given Python package."
|
|
(if tests?
|
|
;; Running `setup.py test` creates an additional .egg-info directory in
|
|
;; build/lib in some cases, e.g. if the source is in a sub-directory
|
|
;; (given with `package_dir`). This will by copied to the output, too,
|
|
;; so we need to remove.
|
|
(let ((before (find-files "build" "\\.egg-info$" #:directories? #t)))
|
|
(call-setuppy test-target '() use-setuptools?)
|
|
(let* ((after (find-files "build" "\\.egg-info$" #:directories? #t))
|
|
(inter (lset-difference string=? after before)))
|
|
(for-each delete-file-recursively inter)))
|
|
(format #t "test suite not run~%"))
|
|
#t)
|
|
|
|
(define (get-python-version python)
|
|
(let* ((version (last (string-split python #\-)))
|
|
(components (string-split version #\.))
|
|
(major+minor (take components 2)))
|
|
(string-join major+minor ".")))
|
|
|
|
(define (site-packages inputs outputs)
|
|
"Return the path of the current output's Python site-package."
|
|
(let* ((out (assoc-ref outputs "out"))
|
|
(python (assoc-ref inputs "python")))
|
|
(string-append out "/lib/python"
|
|
(get-python-version python)
|
|
"/site-packages/")))
|
|
|
|
(define (add-installed-pythonpath inputs outputs)
|
|
"Prepend the Python site-package of OUTPUT to PYTHONPATH. This is useful
|
|
when running checks after installing the package."
|
|
(let ((old-path (getenv "PYTHONPATH"))
|
|
(add-path (site-packages inputs outputs)))
|
|
(setenv "PYTHONPATH"
|
|
(string-append add-path
|
|
(if old-path (string-append ":" old-path) "")))
|
|
#t))
|
|
|
|
(define* (install #:key outputs (configure-flags '()) use-setuptools?
|
|
#:allow-other-keys)
|
|
"Install a given Python package."
|
|
(let* ((out (assoc-ref outputs "out"))
|
|
(params (append (list (string-append "--prefix=" out))
|
|
(if use-setuptools?
|
|
;; distutils does not accept these flags
|
|
(list "--single-version-externally-managed"
|
|
"--root=/")
|
|
'())
|
|
configure-flags)))
|
|
(call-setuppy "install" params use-setuptools?)
|
|
#t))
|
|
|
|
(define* (wrap #:key inputs outputs #:allow-other-keys)
|
|
(define (list-of-files dir)
|
|
(find-files dir (lambda (file stat)
|
|
(and (eq? 'regular (stat:type stat))
|
|
(not (wrapper? file))))))
|
|
|
|
(define bindirs
|
|
(append-map (match-lambda
|
|
((_ . dir)
|
|
(list (string-append dir "/bin")
|
|
(string-append dir "/sbin"))))
|
|
outputs))
|
|
|
|
(let* ((out (assoc-ref outputs "out"))
|
|
(python (assoc-ref inputs "python"))
|
|
(var `("PYTHONPATH" prefix
|
|
,(cons (string-append out "/lib/python"
|
|
(get-python-version python)
|
|
"/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)
|
|
#t))
|
|
|
|
(define* (rename-pth-file #:key name inputs outputs #:allow-other-keys)
|
|
"Rename easy-install.pth to NAME.pth to avoid conflicts between packages
|
|
installed with setuptools."
|
|
;; Even if the "easy-install.pth" is not longer created, we kept this phase.
|
|
;; There still may be packages creating an "easy-install.pth" manually for
|
|
;; some good reason.
|
|
(let* ((out (assoc-ref outputs "out"))
|
|
(python (assoc-ref inputs "python"))
|
|
(site-packages (string-append out "/lib/python"
|
|
(get-python-version python)
|
|
"/site-packages"))
|
|
(easy-install-pth (string-append site-packages "/easy-install.pth"))
|
|
(new-pth (string-append site-packages "/" name ".pth")))
|
|
(when (file-exists? easy-install-pth)
|
|
(rename-file easy-install-pth new-pth))
|
|
#t))
|
|
|
|
(define* (ensure-no-mtimes-pre-1980 #:rest _)
|
|
"Ensure that there are no mtimes before 1980-01-02 in the source tree."
|
|
;; Rationale: patch-and-repack creates tarballs with timestamps at the POSIX
|
|
;; epoch, 1970-01-01 UTC. This causes problems with Python packages,
|
|
;; because Python eggs are ZIP files, and the ZIP format does not support
|
|
;; timestamps before 1980.
|
|
(let ((early-1980 315619200)) ; 1980-01-02 UTC
|
|
(ftw "." (lambda (file stat flag)
|
|
(unless (<= early-1980 (stat:mtime stat))
|
|
(utime file early-1980 early-1980))
|
|
#t))
|
|
#t))
|
|
|
|
(define* (enable-bytecode-determinism #:rest _)
|
|
"Improve determinism of pyc files."
|
|
;; Use deterministic hashes for strings, bytes, and datetime objects.
|
|
(setenv "PYTHONHASHSEED" "0")
|
|
#t)
|
|
|
|
(define %standard-phases
|
|
;; 'configure' phase is not needed.
|
|
(modify-phases gnu:%standard-phases
|
|
(add-after 'unpack 'ensure-no-mtimes-pre-1980 ensure-no-mtimes-pre-1980)
|
|
(add-after 'ensure-no-mtimes-pre-1980 'enable-bytecode-determinism
|
|
enable-bytecode-determinism)
|
|
(delete 'bootstrap)
|
|
(delete 'configure)
|
|
(replace 'install install)
|
|
(replace 'check check)
|
|
(replace 'build build)
|
|
(add-after 'install 'wrap wrap)
|
|
(add-before 'strip 'rename-pth-file rename-pth-file)))
|
|
|
|
(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
|