remember that sources can be a dict

Author: branfosj

easybuild/framework/easyblock.py

@@ -2704,21 +2704,27 @@ def check_checksums_for(self, ent, sub='', source_cnt=None):
         # try to get value with templates resolved, but fall back to not resolving templates;
         # this is better for error reporting that includes names of source files
         try:
-            sources = ent.get('sources', []) + ent.get('data_sources', [])
+            sources = ent.get('sources', [])
+            data_sources = ent.get('data_sources', [])
             patches = ent.get('patches', []) + ent.get('postinstallpatches', [])
             checksums = ent.get('checksums', [])
         except EasyBuildError:
             if isinstance(ent, EasyConfig):
-                sources = ent.get_ref('sources') + ent.get_ref('data_sources')
+                sources = ent.get_ref('sources')
+                data_sources = ent.get_ref('data_sources')
                 patches = ent.get_ref('patches') + ent.get_ref('postinstallpatches')
                 checksums = ent.get_ref('checksums')
 
         # Single source should be re-wrapped as a list, and checksums with it
         if isinstance(sources, dict):
             sources = [sources]
+        if isinstance(data_sources, dict):
+            data_sources = [data_sources]
         if isinstance(checksums, str):
             checksums = [checksums]
 
+        sources = sources + data_sources
+
         if not checksums:
             checksums_from_json = self.get_checksums_from_json()
             # recreate a list of checksums. If each filename is found, the generated list of checksums should match