build: add a tool to scan extensions/ for kernel extensions

tools/kexttool/kext.py

@@ -0,0 +1,37 @@
+import yaml
+import io
+import os
+
+class KextSource:
+    __kext_info = {}
+    __src_dir_path = ''
+    
+
+    def __init__(self, info_file):
+        self.__src_dir_path = os.path.relpath(os.path.dirname(info_file), os.getcwd())
+        with io.open(info_file, 'r', encoding='utf-8') as info_fp:
+            self.__kext_info = yaml.safe_load(info_fp)
+
+
+    def name(self):
+        return self.__kext_info['name']
+
+
+    def id(self):
+        return self.__kext_info['id']
+
+
+    def license(self):
+        return self.__kext_info['license']
+    
+
+    def copyright(self):
+        return self.__kext_info['copyright']
+
+
+    def sources(self):
+        return self.__kext_info['sources']
+
+
+    def src_dirpath(self):
+        return self.__src_dir_path