fix(setup): add windows support in setup.py

Author: zry656565

setup.py

@@ -1,5 +1,6 @@
 import platform
 import os
+import sys
 
 from urllib.request import urlopen
 
@@ -20,21 +21,31 @@ class PostInstallCommand(install):
 
     def run(self):
         version_tag = 'v{}'.format(version)
-        url_template = 'https://github.com/LeetCode-OpenSource/py-sourcemap/releases/download/{tag}/py_sourcemap.cpython-{py_ver}-{platform}.so'
+        url_template = 'https://github.com/LeetCode-OpenSource/py-sourcemap/releases/download/{tag}/py_sourcemap.{py_ver}-{platform}.{ext}'
         (major, minor, _) = platform.python_version_tuple()
         if major != '3' or not(minor in ['5', '6', '7']):
             raise Exception('Only python 3.5, 3.6, 3.7 are supported')
-        py_version = '{}{}m'.format(major, minor)
         system = platform.system()
         if system == 'Linux':
+            py_version = 'cpython-{}{}m'.format(major, minor)
             usr_platform = 'x86_64-linux-gnu'
+            ext = 'so'
         elif system == 'Darwin':
+            py_version = 'cpython-{}{}m'.format(major, minor)
             usr_platform = 'x86_64-apple-darwin'
+            ext = 'so'
+        elif system == 'Windows':
+            py_version = 'cp{}{}'.format(major, minor)
+            # from https://docs.python.org/3/library/platform.html
+            is_64bits = sys.maxsize > 2**32
+            usr_platform = 'win_amd64' if is_64bits else 'win32'
+            ext = 'pyd'
         else:
-            raise Exception('This lib is only supporting Linux & macOS for now.')
+            raise Exception('Your system is unrecognized: {}'.format(system))
         download_url = url_template.format(tag=version_tag,
                                            py_ver=py_version,
-                                           platform=usr_platform)
+                                           platform=usr_platform,
+                                           ext=ext)
         dist = os.path.join(self.build_lib, 'py_sourcemap/py_sourcemap.so')
         if not local_build:
             with open(dist, 'wb') as f: