+#!/usr/bin/env python3
+
+from sys import argv, exit
+import subprocess as subp
+
+prefix = "release-"
+
+cmd = [
+ "git",
+ "describe",
+ "--always",
+ "--tags",
+ "--match=" + prefix + "*",
+]
+
+if "short" in argv:
+ cmd.append("--abbrev=0")
+
+result = subp.run(cmd, stdout=subp.PIPE, encoding="utf-8")
+version = result.stdout
+
+if not result.returncode and version and version.startswith(prefix):
+ version = version[len(prefix):].strip()
+
+print(version if version else "unknown", end="")
+exit(not version)