Add setup.py for versioning

Author: EvieePy

setup.py

@@ -0,0 +1,37 @@
+import re
+
+from setuptools import setup
+
+
+def get_version() -> str:
+    version = ""
+    with open("starlete_plus/__init__.py") as f:
+        match = re.search(r'^__version__\s*=\s*[\'"]([^\'"]*)[\'"]', f.read(), re.MULTILINE)
+
+    if not match or not match.group(1):
+        raise RuntimeError("Version is not set")
+
+    version = match.group(1)
+
+    if version.endswith(("dev", "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, _ = 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, _ = p.communicate()
+            if out:
+                version += "+g" + out.decode("utf-8").strip()
+        except Exception:
+            pass
+
+    return version
+
+
+setup(version=get_version())