nixpkgs/pkgs/development/python-modules/shapely/library-paths.patch

diff --git a/shapely/geos.py b/shapely/geos.py
index d5a67d2..19b7ffc 100644
--- a/shapely/geos.py
+++ b/shapely/geos.py
@@ -61,127 +61,10 @@ def load_dll(libname, fallbacks=None, mode=DEFAULT_MODE):
             "Could not find lib {} or load any of its variants {}.".format(
                 libname, fallbacks or []))
 
-_lgeos = None
-
-if sys.platform.startswith('linux'):
-    # Test to see if we have a wheel repaired by 'auditwheel' containing its
-    # own libgeos_c
-    geos_whl_so = glob.glob(os.path.abspath(os.path.join(os.path.dirname(
-        __file__), '.libs/libgeos_c-*.so.*')))
-    if len(geos_whl_so) == 1:
-        _lgeos = CDLL(geos_whl_so[0])
-        LOG.debug("Found GEOS DLL: %r, using it.", _lgeos)
-    elif hasattr(sys, 'frozen'):
-        geos_pyinstaller_so = glob.glob(os.path.join(sys.prefix, 'libgeos_c-*.so.*'))
-        if len(geos_pyinstaller_so) == 1:
-            _lgeos = CDLL(geos_pyinstaller_so[0])
-            LOG.debug("Found GEOS DLL: %r, using it.", _lgeos)
-    elif os.getenv('CONDA_PREFIX', ''):
-        # conda package.
-        _lgeos = CDLL(os.path.join(sys.prefix, 'lib', 'libgeos_c.so'))
-    else:
-        alt_paths = [
-            'libgeos_c.so.1',
-            'libgeos_c.so',
-        ]
-        _lgeos = load_dll('geos_c', fallbacks=alt_paths)
-    # Necessary for environments with only libc.musl
-    c_alt_paths = [
-        'libc.musl-x86_64.so.1'
-    ]
-    free = load_dll('c', fallbacks=c_alt_paths).free
-    free.argtypes = [c_void_p]
-    free.restype = None
-
-elif sys.platform == 'darwin':
-    # Test to see if we have a delocated wheel with a GEOS dylib.
-    geos_whl_dylib = os.path.abspath(os.path.join(os.path.dirname(
-        __file__), '.dylibs/libgeos_c.1.dylib'))
-
-    if os.path.exists(geos_whl_dylib):
-        handle = CDLL(None)
-        if hasattr(handle, "initGEOS_r"):
-            LOG.debug("GEOS already loaded")
-            _lgeos = handle
-        else:
-            _lgeos = CDLL(geos_whl_dylib)
-            LOG.debug("Found GEOS DLL: %r, using it.", _lgeos)
-
-    elif os.getenv('CONDA_PREFIX', ''):
-        # conda package.
-        _lgeos = CDLL(os.path.join(sys.prefix, 'lib', 'libgeos_c.dylib'))
-    else:
-        if hasattr(sys, 'frozen'):
-            try:
-                # .app file from py2app
-                alt_paths = [os.path.join(
-                    os.environ['RESOURCEPATH'], '..', 'Frameworks',
-                    'libgeos_c.dylib')]
-            except KeyError:
-                # binary from pyinstaller
-                alt_paths = [
-                    os.path.join(sys.executable, 'libgeos_c.dylib')]
-                if hasattr(sys, '_MEIPASS'):
-                    alt_paths.append(
-                        os.path.join(sys._MEIPASS, 'libgeos_c.1.dylib'))
-        else:
-            alt_paths = [
-                # The Framework build from Kyng Chaos
-                "/Library/Frameworks/GEOS.framework/Versions/Current/GEOS",
-                # macports
-                '/opt/local/lib/libgeos_c.dylib',
-                # homebrew
-                '/usr/local/lib/libgeos_c.dylib',
-            ]
-        _lgeos = load_dll('geos_c', fallbacks=alt_paths)
-
-    # ctypes.CDLL(None) internally calls dlopen(NULL), and as the dlopen
-    # manpage says, "If filename is NULL, then the returned handle is for the
-    # main program". This way we can let the linker do the work to figure out
-    # which libc Python is actually using.
-    free = CDLL(None).free
-    free.argtypes = [c_void_p]
-    free.restype = None
-
-elif sys.platform == 'win32':
-    if os.getenv('CONDA_PREFIX', ''):
-        # conda package.
-        _lgeos = CDLL(os.path.join(sys.prefix, 'Library', 'bin', 'geos_c.dll'))
-    else:
-        try:
-            egg_dlls = os.path.abspath(
-                os.path.join(os.path.dirname(__file__), 'DLLs'))
-            if hasattr(sys, '_MEIPASS'):
-                wininst_dlls = sys._MEIPASS
-            elif hasattr(sys, "frozen"):
-                wininst_dlls = os.path.normpath(
-                    os.path.abspath(sys.executable + '../../DLLS'))
-            else:
-                wininst_dlls = os.path.abspath(os.__file__ + "../../../DLLs")
-            original_path = os.environ['PATH']
-            os.environ['PATH'] = "%s;%s;%s" % \
-                (egg_dlls, wininst_dlls, original_path)
-            _lgeos = load_dll("geos_c.dll")
-        except (ImportError, WindowsError, OSError):
-            raise
-
-        def free(m):
-            try:
-                cdll.msvcrt.free(m)
-            except WindowsError:
-                # XXX: See http://trac.gispython.org/projects/PCL/ticket/149
-                pass
-
-elif sys.platform == 'sunos5':
-    _lgeos = load_dll('geos_c', fallbacks=['libgeos_c.so.1', 'libgeos_c.so'])
-    free = CDLL('libc.so.1').free
-    free.argtypes = [c_void_p]
-    free.restype = None
-else:  # other *nix systems
-    _lgeos = load_dll('geos_c', fallbacks=['libgeos_c.so.1', 'libgeos_c.so'])
-    free = load_dll('c', fallbacks=['libc.so.6']).free
-    free.argtypes = [c_void_p]
-    free.restype = None
+_lgeos = CDLL('@libgeos_c@')
+free = CDLL('@libc@').free
+free.argtypes = [c_void_p]
+free.restype = None
 
 
 def _geos_version():
diff --git a/tests/test_dlls.py b/tests/test_dlls.py
index 35f9cc2..3dfcaac 100644
--- a/tests/test_dlls.py
+++ b/tests/test_dlls.py
@@ -12,12 +12,7 @@ class LoadingTestCase(unittest.TestCase):
     @unittest.skipIf(sys.platform == "win32", "FIXME: adapt test for win32")
     def test_fallbacks(self):
         load_dll('geos_c', fallbacks=[
-            os.path.join(sys.prefix, "lib", "libgeos_c.dylib"), # anaconda (Mac OS X)
-            '/opt/local/lib/libgeos_c.dylib',  # MacPorts
-            '/usr/local/lib/libgeos_c.dylib',  # homebrew (Mac OS X)
-            os.path.join(sys.prefix, "lib", "libgeos_c.so"), # anaconda (Linux)
-            'libgeos_c.so.1',
-            'libgeos_c.so'])
+            '@libgeos_c@'])
 
 
 def test_suite():