[PATCH] gnu: Add matplotlib.

[Federico Beffa]

Hi,

attached you find a patch for matplotlib.

For python2-matplotlib I've noticed a behavior that I do not
understand: matplotlib depends on numpydoc which I pushed yesterday
and appears not to be ready yet on hydra. If I build
python2-matplotlib with

./pre-inst-env guix build python2-matplotlib

guix tells me that it will build among other packages

/gnu/store/gjfrir5iykxwxicp9dxjv3adk5vpifb4-python2-numpydoc-0.5.drv

However, the build process for this package fails, because a test
fails. Since I prepared the numpydoc package I know about this test
and know that the package includes the parameter #:tests? #f.

In fact, if I explicitly build python2-numpydoc with

./pre-inst-env guix build python2-numpydoc

it finished successfully (skipping the tests).

The two ways of causing numpydoc to be built (direct and indirect)
generate two independent

/gnu/store/...-python2-numpydoc-0.5-guile-builder

The one generated by an explicit build command includes the #:tests?
#f flag as expected. However, the indirect one includes a #:tests? #t
flag! I'm confused. Am I missing something?

Here the definition of python2-numpydoc:

(define-public python2-numpydoc
  (package
    (inherit (package-with-python2 python-numpydoc))
    ;; With python-2 1 test (out of 30) fails because it doesn't find
    ;; matplotlib.  With python-3 it seems to detect at run-time the absence
    ;; of matplotlib.
    (arguments `(#:tests? #f
                 #:python ,python-2))))

Thanks for your advice.
Regards,
Fede

0001-gnu-Add-matplotlib.patch
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