drops mac support for now

Author: r-zenine

setup.py

@@ -94,7 +94,7 @@ def get_extensions():
     third_party_search_directories = []
 
     runtime_library_dirs = None
-    if sys.platform.startswith('linux') or sys.platform.startswith('darwin'):
+    if sys.platform.startswith('linux'):
         sources = sources + source_image_cpu
         libraries.append('png')
         third_party_search_directories.append(os.path.join(cwd, "third_party/libpng"))
@@ -222,7 +222,7 @@ def throw_of_failure(command):
 
 def build_deps():
     this_dir = os.path.dirname(os.path.abspath(__file__))
-    if sys.platform.startswith('linux') or sys.platform.startswith('darwin'):
+    if sys.platform.startswith('linux'):
         cpu_count = multiprocessing.cpu_count()
         os.chdir("third_party/zlib/")
         throw_of_failure('cmake .')
@@ -232,8 +232,6 @@ def build_deps():
         zlib_path = os.path.join(this_dir, "third_party/zlib")
         if sys.platform.startswith("linux"):
             libpng_cmake_options = "-DPNG_BUILD_ZLIB=ON -DPNG_STATIC=OFF -DZLIB_INCLUDE_DIR:PATH={zlib_path} -DZLIB_LIBRARY:FILEPATH={zlib_path}/libz.so".format(zlib_path=zlib_path)
-        if sys.platform.startswith("darwin"):
-            libpng_cmake_options = "-DPNG_BUILD_ZLIB=ON -DPNG_STATIC=OFF -DZLIB_INCLUDE_DIR:PATH={zlib_path} -DZLIB_LIBRARY:FILEPATH={zlib_path}/libz.dylib".format(zlib_path=zlib_path)
         os.chdir("third_party/libpng/")
         os.system('cmake {} .'.format(libpng_cmake_options))
         throw_of_failure("cmake --build . -- -j {}".format(cpu_count))
@@ -253,14 +251,6 @@ def build_ext_with_dependencies(self):
             'third_party/libpng/libpng.so'])
     ]
 
-if sys.platform.startswith('darwin'):
-    data_files = [
-        ('torchvision/lib', [
-            'third_party/zlib/libz.dylib',
-            'third_party/libpng/libpng.dylib'])
-    ]
-
-
 setup(
     # Metadata
     name=package_name,

test/test_image.py

@@ -4,7 +4,7 @@
 
 import torch
 from PIL import Image
-if sys.platform.startswith('linux') or sys.platform.startswith("darwin"):
+if sys.platform.startswith('linux'):
     from torchvision.io.image import read_png, decode_png
 import numpy as np
 
@@ -21,14 +21,14 @@ def get_images(directory, img_ext):
 
 
 class ImageTester(unittest.TestCase):
-    @unittest.skipUnless(sys.platform.startswith("linux") or sys.platform.startswith("darwin"), "Support only available on linux for now.")
+    @unittest.skipUnless(sys.platform.startswith("linux"), "Support only available on linux for now.")
     def test_read_png(self):
         for img_path in get_images(IMAGE_DIR, ".png"):
             img_pil = torch.from_numpy(np.array(Image.open(img_path)))
             img_lpng = read_png(img_path)
             self.assertTrue(torch.equal(img_lpng, img_pil))
 
-    @unittest.skipUnless(sys.platform.startswith("linux") or sys.platform.startswith("darwin"), "Support only available on linux for now.")
+    @unittest.skipUnless(sys.platform.startswith("linux"), "Support only available on linux for now.")
     def test_decode_png(self):
         for img_path in get_images(IMAGE_DIR, ".png"):
             img_pil = torch.from_numpy(np.array(Image.open(img_path)))