forgot about setup.py let's add it

Author: Vizonex

setup.py

@@ -4,8 +4,9 @@
 if vi < (3, 8):
     raise RuntimeError('uvloop requires Python 3.8 or greater')
 
-if sys.platform in ('win32', 'cygwin', 'cli'):
-    raise RuntimeError('uvloop does not support Windows at the moment')
+# TODO: Remove Completely because Winloop Author is mergeing his project to uvloop.
+# if sys.platform in ('win32', 'cygwin', 'cli'):
+#     raise RuntimeError('uvloop does not support Windows at the moment')
 
 import os
 import os.path
@@ -28,6 +29,9 @@
 LIBUV_DIR = str(_ROOT / 'vendor' / 'libuv')
 LIBUV_BUILD_DIR = str(_ROOT / 'build' / 'libuv-{}'.format(MACHINE))
 
+# NOTE: Mingw was added by another contributor in the winloop project.
+MINGW = bool(os.environ.get("MINGW_PREFIX", ""))
+
 
 def _libuv_build_env():
     env = os.environ.copy()
@@ -83,7 +87,9 @@ class uvloop_build_ext(build_ext):
 
     def initialize_options(self):
         super().initialize_options()
-        self.use_system_libuv = False
+        # Use mingw if prefix was given for it otherwise it 
+        # will always be false.
+        self.use_system_libuv = MINGW
         self.cython_always = False
         self.cython_annotate = None
         self.cython_directives = None
@@ -108,7 +114,8 @@ def finalize_options(self):
                         need_cythonize = True
 
         if need_cythonize:
-            import pkg_resources
+            from packaging.requirements import Requirement
+            from packaging.version import Version
 
             # Double check Cython presence in case setup_requires
             # didn't go into effect (most likely because someone
@@ -118,17 +125,21 @@ def finalize_options(self):
                 import Cython
             except ImportError:
                 raise RuntimeError(
-                    'please install {} to compile uvloop from source'.format(
-                        CYTHON_DEPENDENCY))
+                    "please install {} to compile uvloop from source".format(
+                        CYTHON_DEPENDENCY
+                    )
+                )
 
-            cython_dep = pkg_resources.Requirement.parse(CYTHON_DEPENDENCY)
-            if Cython.__version__ not in cython_dep:
+            cython_dep = Requirement(CYTHON_DEPENDENCY)
+            if not cython_dep.specifier.contains(Version(Cython.__version__)):
                 raise RuntimeError(
-                    'uvloop requires {}, got Cython=={}'.format(
+                    "uvloop requires {}, got Cython=={}".format(
                         CYTHON_DEPENDENCY, Cython.__version__
-                    ))
+                    )
+                )
 
             from Cython.Build import cythonize
+            
 
             directives = {}
             if self.cython_directives:
@@ -190,6 +201,15 @@ def build_libuv(self):
             cwd=LIBUV_BUILD_DIR, env=env, check=True)
 
     def build_extensions(self):
+        if sys.platform == "win32" and not MINGW:
+            path = pathlib.Path("vendor", "libuv", "src")
+            c_files = [p.as_posix() for p in path.iterdir() if p.suffix == ".c"]
+            c_files += [
+                p.as_posix() for p in (path / "win").iterdir() if p.suffix == ".c"
+            ]
+            self.extensions[-1].sources += c_files
+            super().build_extensions()
+            return
         if self.use_system_libuv:
             self.compiler.add_library('uv')
 
@@ -229,28 +249,63 @@ def build_extensions(self):
         raise RuntimeError(
             'unable to read the version from uvloop/_version.py')
 
+if sys.platform == "win32":
+    from Cython.Build import cythonize
+    from Cython.Compiler.Main import default_options
+
+    default_options["compile_time_env"] = dict(DEFAULT_FREELIST_SIZE=250)
+    ext = cythonize(
+        [
+            Extension(
+                "uvloop.loop",
+                sources=["uvloop/loop.pyx"],
+                include_dirs=[]
+                if MINGW
+                else [
+                    "vendor/libuv/src",
+                    "vendor/libuv/src/win",
+                    "vendor/libuv/include",
+                ],
+                extra_compile_args=["/std:c11", "/experimental:c11atomics"],
+                # subset of libuv Windows libraries:
+                extra_link_args=[
+                    (f"-l{lib}" if MINGW else f"{lib}.lib")
+                    for lib in (
+                        "Shell32",
+                        "Ws2_32",
+                        "Advapi32",
+                        "iphlpapi",
+                        "Userenv",
+                        "User32",
+                        "Dbghelp",
+                        "Ole32",
+                    )
+                ],
+                define_macros=[("WIN32_LEAN_AND_MEAN", 1), ("_WIN32_WINNT", "0x0602")],
+            ),
+        ]
+    )
+else:
+    ext = [
+        Extension(
+            "uvloop.loop",
+            sources=[
+                "uvloop/loop.pyx",
+            ],
+            extra_compile_args=MODULES_CFLAGS,
+        ),
+    ]
 
 setup_requires = []
 
-if not (_ROOT / 'uvloop' / 'loop.c').exists() or '--cython-always' in sys.argv:
+if not (_ROOT / "uvloop" / "loop.c").exists() or "--cython-always" in sys.argv:
     # No Cython output, require Cython to build.
     setup_requires.append(CYTHON_DEPENDENCY)
 
 
 setup(
     version=VERSION,
-    cmdclass={
-        'sdist': uvloop_sdist,
-        'build_ext': uvloop_build_ext
-    },
-    ext_modules=[
-        Extension(
-            "uvloop.loop",
-            sources=[
-                "uvloop/loop.pyx",
-            ],
-            extra_compile_args=MODULES_CFLAGS
-        ),
-    ],
+    cmdclass={"sdist": uvloop_sdist, "build_ext": uvloop_build_ext},
+    ext_modules=ext,
     setup_requires=setup_requires,
 )