[deviantart] allow selecting source for 'extra' (#1356)

Setting 'extra' to "stash" or "deviations" will only download embedded
sta.sh content or deviations. 'true' still downloads both.

docs/configuration.rst

@@ -745,14 +745,18 @@ Description
 extractor.deviantart.extra
 --------------------------
 Type
-    ``bool``
+    ``bool`` or ``string``
 Default
     ``false``
 Description
     Download embedded Deviations and Sta.sh resources from
     description texts and journals.
 
-    Note: Enabling this option also enables deviantart.metadata_.
+    Set this option to ``"stash"`` or ``"deviations"``
+    to select only one of them as a source.
+
+    Note: Enabling this option also enables
+    `deviantart.metadata <extractor.deviantart.metadata_>`_.
 
 
 extractor.deviantart.flat
@@ -2760,7 +2764,6 @@ Description
 
 .. _base-directory: `extractor.*.base-directory`_
 .. _date-format: `extractor.*.date-format`_
-.. _deviantart.metadata: `extractor.deviantart.metadata`_
 .. _postprocessors: `extractor.*.postprocessors`_
 .. _download archive: `extractor.*.archive`_
 

gallery_dl/extractor/deviantart.py

@@ -78,9 +78,18 @@ class DeviantartExtractor(Extractor):
             else:
                 self.user = profile["user"]["username"]
 
-        if self.extra:
+        extra = self.extra
-            finditer_stash = DeviantartStashExtractor.pattern.finditer
+        if extra:
-            finditer_deviation = DeviantartDeviationExtractor.pattern.finditer
+            if extra == "stash":
+                extra_stash = DeviantartStashExtractor.pattern.finditer
+                extra_deviation = None
+            elif extra == "deviations":
+                extra_deviation = DeviantartDeviationExtractor.pattern.finditer
+                extra_stash = None
+            else:
+                extra_stash = DeviantartStashExtractor.pattern.finditer
+                extra_deviation = DeviantartDeviationExtractor.pattern.finditer
+            extra = True
 
         yield Message.Version, 1
         for deviation in self.deviations():
@@ -131,18 +140,20 @@ class DeviantartExtractor(Extractor):
 
             if "excerpt" in deviation and self.commit_journal:
                 journal = self.api.deviation_content(deviation["deviationid"])
-                if self.extra:
+                if extra:
                     deviation["_journal"] = journal["html"]
                 yield self.commit_journal(deviation, journal)
 
-            if self.extra:
+            if extra:
                 txt = (deviation.get("description", "") +
                        deviation.get("_journal", ""))
-                for match in finditer_stash(txt):
+                if extra_stash:
+                    for match in extra_stash(txt):
                         url = text.ensure_http_scheme(match.group(0))
                         deviation["_extractor"] = DeviantartStashExtractor
                         yield Message.Queue, url, deviation
-                for match in finditer_deviation(txt):
+                if extra_deviation:
+                    for match in extra_deviation(txt):
                         url = text.ensure_http_scheme(match.group(0))
                         deviation["_extractor"] = DeviantartDeviationExtractor
                         yield Message.Queue, url, deviation