diff options
Diffstat (limited to 'guix/build/python-build-system.scm')
| -rw-r--r-- | guix/build/python-build-system.scm | 54 |
1 files changed, 34 insertions, 20 deletions
diff --git a/guix/build/python-build-system.scm b/guix/build/python-build-system.scm index 09bd8465c8..1179315ce2 100644 --- a/guix/build/python-build-system.scm +++ b/guix/build/python-build-system.scm @@ -6,6 +6,8 @@ ;;; Copyright © 2016 Hartmut Goebel <h.goebel@crazy-compilers.com> ;;; Copyright © 2018 Ricardo Wurmus <rekado@elephly.net> ;;; Copyright © 2018 Arun Isaac <arunisaac@systemreboot.net> +;;; Copyright © 2019, 2020 Maxim Cournoyer <maxim.cournoyer@gmail.com> +;;; Copyright © 2020 Jakub Kądziołka <kuba@kadziolka.net> ;;; ;;; This file is part of GNU Guix. ;;; @@ -154,9 +156,14 @@ (major+minor (take components 2))) (string-join major+minor "."))) +(define (python-output outputs) + "Return the path of the python output, if there is one, or fall-back to out." + (or (assoc-ref outputs "python") + (assoc-ref outputs "out"))) + (define (site-packages inputs outputs) "Return the path of the current output's Python site-package." - (let* ((out (assoc-ref outputs "out")) + (let* ((out (python-output outputs)) (python (assoc-ref inputs "python"))) (string-append out "/lib/python" (python-version python) @@ -172,18 +179,31 @@ when running checks after installing the package." (if old-path (string-append ":" old-path) ""))) #t)) -(define* (install #:key outputs (configure-flags '()) use-setuptools? +(define* (install #:key inputs 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)) + (let* ((out (python-output outputs)) + (python (assoc-ref inputs "python")) + (major-minor (map string->number + (take (string-split (python-version python) #\.) 2))) + (<3.7? (match major-minor + ((major minor) + (or (< major 3) (and (= major 3) (< minor 7)))))) + (params (append (list (string-append "--prefix=" out) + "--no-compile") (if use-setuptools? ;; distutils does not accept these flags (list "--single-version-externally-managed" - "--root=/") + "--root=/") '()) configure-flags))) (call-setuppy "install" params use-setuptools?) + ;; Rather than produce potentially non-reproducible .pyc files on Pythons + ;; older than 3.7, whose 'compileall' module lacks the + ;; '--invalidation-mode' option, do not generate any. + (unless <3.7? + (invoke "python" "-m" "compileall" "--invalidation-mode=unchecked-hash" + out)) #t)) (define* (wrap #:key inputs outputs #:allow-other-keys) @@ -199,12 +219,8 @@ when running checks after installing the package." (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" - (python-version python) - "/site-packages") + (let* ((var `("PYTHONPATH" prefix + ,(cons (site-packages inputs outputs) (search-path-as-string->list (or (getenv "PYTHONPATH") "")))))) (for-each (lambda (dir) @@ -220,11 +236,7 @@ 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" - (python-version python) - "/site-packages")) + (let* ((site-packages (site-packages inputs outputs)) (easy-install-pth (string-append site-packages "/easy-install.pth")) (new-pth (string-append site-packages "/" name ".pth"))) (when (file-exists? easy-install-pth) @@ -248,14 +260,16 @@ installed with setuptools." "Improve determinism of pyc files." ;; Use deterministic hashes for strings, bytes, and datetime objects. (setenv "PYTHONHASHSEED" "0") + ;; Prevent Python from creating .pyc files when loading modules (such as + ;; when running a test suite). + (setenv "PYTHONDONTWRITEBYTECODE" "1") #t) (define %standard-phases ;; The build phase only builds C extensions and copies the Python sources, - ;; while the install phase byte-compiles and copies them to the prefix - ;; directory. The tests are run after the install phase because otherwise - ;; the cached .pyc generated during the tests execution seem to interfere - ;; with the byte compilation of the install phase. + ;; while the install phase copies then byte-compiles the sources to the + ;; prefix directory. The check phase is moved after the installation phase + ;; to ease testing the built package. (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 |