add an 'annotations' helper script

Add a simple 'annotations' script that allows to run the main
"annotations binary" from source without installing anything in the
system.

Signed-off-by: Andrea Righi <andrea.righi@canonical.com>

diff --git a/annotations b/annotations
new file mode 100755 (executable)
index 0000000..bddfe40
--- /dev/null
+++ b/annotations
@@ -0,0 +1,22 @@
+#!/usr/bin/env python3
+# -*- mode: python -*-
+
+# This file is not installed; it's just to run annotations from inside a source
+# distribution without installing it in the system.
+
+import os
+import sys
+from kconfig import run
+
+
+# Update PATH to make sure that annotations can be executed directly from the
+# source directory.
+def update_path():
+    script_dir = os.path.dirname(os.path.abspath(__file__))
+    current_path = os.environ.get("PATH", "")
+    new_path = f"{script_dir}:{current_path}"
+    os.environ["PATH"] = new_path
+
+
+update_path()
+exit(run.main())