metadata: Add codemeta validation

invenio_github/api.py

@@ -25,7 +25,7 @@
 """Invenio module that adds GitHub integration to the platform."""
 
 import github3
-from convert_codemeta import crosswalk
+from convert_codemeta import crosswalk, validate_codemeta
 from flask import current_app
 from invenio_db import db
 from invenio_oauth2server.models import Token as ProviderToken
@@ -421,15 +421,17 @@ def extra_metadata(self):
     @cached_property
     def codemeta(self):
         """Get extra metadata from codemeta file in repository."""
-        metadata = get_extra_metadata(
+        codemeta = get_extra_metadata(
             self.gh.api,
             self.repository['owner']['login'],
             self.repository['name'],
             self.release['tag_name'],
             'codemeta.json'
         )
-        return crosswalk(metadata, "codemeta", "Zenodo")
-
+        if validate_codemeta(codemeta):
+            return crosswalk(codemeta, "codemeta", "Zenodo")
+        else:
+            return {}
 
     @cached_property
     def files(self):

setup.py

@@ -69,7 +69,7 @@
     'Flask-Menu>=0.5.0',
     'Flask>=1.0.4',
     'WTForms-Alchemy>=0.15.0,<0.17',
-    'convert-codemeta>=0.2.0',
+    'convert-codemeta>=0.4.0',
     'email-validator>=1.0.5',
     'github3.py==1.0.0a4',
     'humanize>=0.5.1',