Add check for SPDX license identifier

kodi_addon_checker/check_addon.py

@@ -47,6 +47,8 @@ def start(addon_path, branch_name, all_repo_addons, pr, config=None):
 
             check_dependencies.check_addon_dependencies(addon_report, repo_addons, parsed_xml, branch_name)
 
+            check_files.check_license_identifier(addon_report, addon_path)
+
             check_files.check_file_permission(addon_report, addon_path)
 
             check_files.check_for_invalid_xml_files(addon_report, file_index)

kodi_addon_checker/check_files.py

@@ -1,6 +1,7 @@
 import os
 import re
 import json
+import ast
 import xml.etree.ElementTree as ET
 from pathlib import Path
 from . import handle_files
@@ -124,3 +125,21 @@ def check_file_permission(report: Report, addon_path: str):
     for file in files:
         if os.path.isfile(file) and os.access(str(file), os.X_OK):
             report.add(Record(PROBLEM, "%s is marked as stand-alone executable" % relative_path(str(file))))
+
+
+def check_license_identifier(report: Report, addon_path: str):
+    """Check whether all the files present in the addon
+       contains the SPDX license header or not
+        :addon_path: Path of the addon
+    """
+
+    files = Path(addon_path).glob('**/*.py')
+
+    for file in files:
+        with open(str(file), 'r') as f:
+            tree = ast.parse(f.read())
+
+        docstring = ast.get_docstring(tree)
+        if docstring and "SPDX-License-Identifier" not in docstring:
+            report.add(Record(WARNING, "SPDX-License-Identifier is missing from addon file %s" %
+                              relative_path(str(file))))