[wikimedia] implement config lookup for fandom/wikigg sites (#7283)

{
    "extractor": {
        "fandom": {
            "filename": "..."
        }
    }
}

gallery_dl/extractor/common.py

@@ -961,6 +961,7 @@ class AsynchronousMixin():
 
 
 class BaseExtractor(Extractor):
+    basesubcategory = ""
     instances = ()
 
     def __init__(self, match):

gallery_dl/extractor/e621.py

@@ -180,6 +180,7 @@ class E621FavoriteExtractor(E621Extractor):
 class E621FrontendExtractor(Extractor):
     """Extractor for alternative e621 frontends"""
     basecategory = "E621"
+    basesubcategory = ""
     category = "e621"
     subcategory = "frontend"
     pattern = r"(?:https?://)?e621\.(?:cc/\?tags|anthro\.fr/\?q)=([^&#]*)"

gallery_dl/extractor/wikimedia.py

@@ -27,6 +27,7 @@ class WikimediaExtractor(BaseExtractor):
         if self.category == "wikimedia":
             self.category = self.root.split(".")[-2]
         elif self.category in ("fandom", "wikigg"):
+            self.basesubcategory = self.category
             self.category = (
                 f"{self.category}-"
                 f"{self.root.partition('.')[0].rpartition('/')[2]}")

gallery_dl/job.py

@@ -130,6 +130,8 @@ class Job():
         if extr.basecategory:
             if not cfgpath:
                 cfgpath.append((extr.category, extr.subcategory))
+            if extr.basesubcategory:
+                cfgpath.append((extr.basesubcategory, extr.subcategory))
             cfgpath.append((extr.basecategory, extr.subcategory))
 
         return cfgpath

test/test_job.py

@@ -214,6 +214,7 @@ Request interval (default):
     def test_base_category(self):
         extr = TestExtractor.from_url("test:")
         extr.basecategory = "test_basecategory"
+        extr.basesubcategory = "test_basesubcategory"
 
         self.assertEqual(self._capture_stdout(extr), """\
 Category / Subcategory / Basecategory