implement automatic updater

updater/git.py

@@ -0,0 +1,17 @@
+import subprocess
+
+
+user_name = 'Updater Robot'
+user_email = 'robot@nowhere.invalid'
+
+
+def add_commit_push(directory: str, message: str):
+    diff = subprocess.run(['git', 'diff', '--cached', '--exit-code'], capture_output=True, text=True)
+    if diff.returncode != 0:
+        status = subprocess.run(['git', 'status'], capture_output=True, text=True)
+        raise Exception('Unknown staged changes found: {}'.format(status.stdout))
+
+    subprocess.run(['git', 'add', '--all', directory], check=True)
+    subprocess.run(['git', '-c', 'user.name={}'.format(user_name), '-c', 'user.email={}'.format(user_email),
+                    'commit', '--message', message])
+    subprocess.run(['git', 'push'])