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guix: python-build-system: Import setuptools before calling `setup.py'. 

This is needed for packages using "distutils" instead of "setuptools" since
the former does not understand the "--single-version-externally-managed"
flag. Also export __file__ since it will be unset when setup.py is called from
python "exec".

* guix/build/python-build-system.scm (call-setuppy): extend "python setup.py"
  call to import setuptools, export __file__, and call setup.py from
  setuptools python environment.

Co-Authored-By: Hartmut Goebel <h.goebel@crazy-compilers.com>
This commit is contained in:
Marius Bakke 2016-09-29 18:41:35 +01:00 committed by Hartmut Goebel
parent 7db40bce58
commit 46bcdcc287
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1 changed files with 13 additions and 1 deletions
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14
guix/build/python-build-system.scm
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@ -36,13 +36,25 @@
;;
;; Code:
(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)
(if (file-exists? "setup.py")
(begin
(format #t "running \"python setup.py\" with command ~s and parameters ~s~%"
command params)
(zero? (apply system* "python" "setup.py" command params)))
(zero? (apply system* "python" "-c" setuptools-shim command params)))
(error "no setup.py found")))
(define* (build #:rest empty)