Revert "Remove setup.py"

This reverts commit a8e574b.

setup.py

@@ -1,31 +1,31 @@
-# from setuptools import setup
-# import re
-#
-# def derive_version() -> str:
-#     version = ''
-#     with open('discord/__init__.py') as f:
-#         version = re.search(r'^__version__\s*=\s*[\'"]([^\'"]*)[\'"]', f.read(), re.MULTILINE).group(1)
-#
-#     if not version:
-#         raise RuntimeError('version is not set')
-#
-#     if version.endswith(('a', 'b', 'rc')):
-#         # append version identifier based on commit count
-#         try:
-#             import subprocess
-#
-#             p = subprocess.Popen(['git', 'rev-list', '--count', 'HEAD'], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
-#             out, err = p.communicate()
-#             if out:
-#                 version += out.decode('utf-8').strip()
-#             p = subprocess.Popen(['git', 'rev-parse', '--short', 'HEAD'], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
-#             out, err = p.communicate()
-#             if out:
-#                 version += '+g' + out.decode('utf-8').strip()
-#         except Exception:
-#             pass
-#
-#     return version
-#
-#
-# setup(version=derive_version())
+from setuptools import setup
+import re
+
+def derive_version() -> str:
+    version = ''
+    with open('discord/__init__.py') as f:
+        version = re.search(r'^__version__\s*=\s*[\'"]([^\'"]*)[\'"]', f.read(), re.MULTILINE).group(1)
+
+    if not version:
+        raise RuntimeError('version is not set')
+
+    if version.endswith(('a', 'b', 'rc')):
+        # append version identifier based on commit count
+        try:
+            import subprocess
+
+            p = subprocess.Popen(['git', 'rev-list', '--count', 'HEAD'], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+            out, err = p.communicate()
+            if out:
+                version += out.decode('utf-8').strip()
+            p = subprocess.Popen(['git', 'rev-parse', '--short', 'HEAD'], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+            out, err = p.communicate()
+            if out:
+                version += '+g' + out.decode('utf-8').strip()
+        except Exception:
+            pass
+
+    return version
+
+
+setup(version=derive_version())