[Quality] Automatically get version

Author: matteobettini

setup.py

@@ -1,12 +1,28 @@
 #  Copyright (c) 2022-2024.
 #  ProrokLab (https://www.proroklab.org/)
 #  All rights reserved.
+import pathlib
 
 from setuptools import find_packages, setup
 
+
+def get_version():
+    """Gets the vmas version."""
+    path = CWD / "vmas" / "__init__.py"
+    content = path.read_text()
+
+    for line in content.splitlines():
+        if line.startswith("__version__"):
+            return line.strip().split()[-1].strip().strip('"')
+    raise RuntimeError("bad version data in __init__.py")
+
+
+CWD = pathlib.Path(__file__).absolute().parent
+
+
 setup(
     name="vmas",
-    version="1.4.0",
+    version=get_version(),
     description="Vectorized Multi-Agent Simulator",
     url="https://github.com/proroklab/VectorizedMultiAgentSimulator",
     license="GPLv3",