adds build code

build/versioning.py

@@ -0,0 +1,19 @@
+import os
+
+import semver
+
+CURRENT_PATH = os.path.dirname(os.path.realpath(__file__))
+CURRENT_VER_FILE = os.path.join(CURRENT_PATH, ".version")
+
+
+def get_version():
+    if not os.path.isfile(CURRENT_VER_FILE):
+        return semver.Version.parse('1.0.0')
+    with open(CURRENT_VER_FILE) as f:
+        content = f.read()
+        return semver.Version.parse(content)
+
+
+def save_version(version: semver.Version):
+    with open(CURRENT_VER_FILE, 'w') as f:
+        f.write(version.__str__())