bug#43855: gnu: python-shapely fails to build

[Efraim Flashner <efraim@flashner.co.il>]

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On Wed, Oct 07, 2020 at 11:32:01PM +0200, Malte Frank Gerdes wrote:
> Hi,
> 
> python-shapely fails to build, because it can't find the c libary,
> the package definition was not complete (patch at the end).
> 
> Now the package finds a C libary but the Test Suite fails with the
> follwoing error:
> 
> --8<---------------cut here---------------start------------->8---
> ======================================================================
> FAIL: test_operations (tests.test_operations.OperationsTestCase)
> ----------------------------------------------------------------------
> Traceback (most recent call last):
>   File "/tmp/guix-build-python-shapely-1.6.4.post2.drv-0/Shapely-1.6.4.post2/tests/test_operations.py", line 25, in test_operations
>     self.assertIsInstance(point.intersection(Point(-1, -1)),
> AssertionError: <shapely.geometry.point.Point object at 0x7fffe1544f70> is not an instance of <class 'shapely.geometry.collection.GeometryCollection'>
> --8<---------------cut here---------------end--------------->8---
> 
> This package was last successfully built on 13th September.
> 

It turns out this is due to a change in geos with 3.8
https://github.com/Toblerity/Shapely/issues/799

If I cherry-pick the patch to fix it then it passes the test suite. If I
upgrade python-shapely to 1.7.1 the fix is already included but there's
a new build error:

gcc -pthread -shared -Wl,-rpath=/gnu/store/q9rm8h9imazsq2c4qiv2yjpvlvliywqb-python-3.8.2/lib build/temp.linux-x86_64-3.8/shapely/vectorized/_vectorized.o -L/gnu/store/pinvpk9w6izxcwci4ghiwgvykmgsfy2c-geos-3.8.1/lib -L/gnu/store/q9rm8h9imazsq2c4qiv2yjpvlvliywqb-python-3.8.2/lib -lgeos_c -o /tmp/guix-build-python-shapely-1.7.1.drv-0/Shapely-1.7.1/shapely/vectorized/_vectorized.cpython-38-x86_64-linux-gnu.so
warning: no library file corresponding to '/gnu/store/603imkkh2bqs01z8ik0b2ndgpdz0jghk-python-numpy-1.17.3/lib/python3.8/site-packages/numpy/core/include' found (skipping)
warning: no library file corresponding to '/gnu/store/603imkkh2bqs01z8ik0b2ndgpdz0jghk-python-numpy-1.17.3/lib/python3.8/site-packages/numpy/core/include' found (skipping)
error: Could not find lib c or load any of its variants ['libc.musl-x86_64.so.1'].
command "python" "-c" "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'))" "test" failed with status 1
builder for `/gnu/store/2yz1ybl0156canhfz4vhay0g473c5nwv-python-shapely-1.7.1.drv' failed with exit code 1
build of /gnu/store/2yz1ybl0156canhfz4vhay0g473c5nwv-python-shapely-1.7.1.drv failed
View build log at '/var/log/guix/drvs/2y/z1ybl0156canhfz4vhay0g473c5nwv-python-shapely-1.7.1.drv.bz2'.
guix build: error: build of `/gnu/store/2yz1ybl0156canhfz4vhay0g473c5nwv-python-shapely-1.7.1.drv' failed

Do you want to take a stab at updating python-shapely to 1.7.1?

> 
> Malte
> 
> --8<---------------cut here---------------start------------->8---
> diff --git a/gnu/packages/python-xyz.scm b/gnu/packages/python-xyz.scm
> index 459526941b..02744bfc6d 100644
> --- a/gnu/packages/python-xyz.scm
> +++ b/gnu/packages/python-xyz.scm
> @@ -533,13 +533,16 @@ pidof, tty, taskset, pmap.")
>               (let ((geos (assoc-ref inputs "geos"))
>                     (glibc (assoc-ref inputs ,(if (%current-target-system)
>                                                   "cross-libc" "libc"))))
> -               (substitute* "shapely/geos.py"
> -                 (("_lgeos = load_dll\\('geos_c', fallbacks=.*\\)")
> -                  (string-append "_lgeos = load_dll('geos_c', fallbacks=['"
> -                                 geos "/lib/libgeos_c.so'])"))
> -                 (("free = load_dll\\('c'\\)\\.free")
> -                  (string-append "free = load_dll('c', fallbacks=['"
> -                                 glibc "/lib/libc.so.6']).free"))))
> +               (map
> +                (lambda (file)
> +                  (substitute* file
> +                    (("_lgeos = load_dll\\('geos_c', fallbacks=.*\\)")
> +                     (string-append "_lgeos = load_dll('geos_c', fallbacks=['"
> +                                    geos "/lib/libgeos_c.so'])"))
> +                    (("free = load_dll\\('c'\\)\\.free")
> +                     (string-append "free = load_dll('c', fallbacks=['"
> +                                    glibc "/lib/libc.so.6']).free"))))
> +                '("shapely/geos.py" "shapely/_buildcfg.py")))
>               #t)))))
>      (home-page "https://github.com/Toblerity/Shapely")
>      (synopsis "Library for the manipulation and analysis of geometric objects")
> --8<---------------cut here---------------end--------------->8---
> 

substitute* can take a list, so it would be simpler to write this as:
substitute* '("shapely/geos.py"
              "shapely/_buildcfg.py")

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Efraim Flashner   <efraim@flashner.co.il>   אפרים פלשנר
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