fix #918

Signed-off-by: Chris “Kwpolska” Warrick <kwpolska@gmail.com>

nikola/post.py

@@ -331,10 +331,17 @@ def fragment_deps(self, lang):
             with codecs.open(dep_path, 'rb+', 'utf8') as depf:
                 deps.extend([l.strip() for l in depf.readlines()])
         if lang != self.default_lang:
-            lang_deps = list(filter(os.path.exists, [x + "." + lang for x in
-                                                     deps]))
+            lang_deps = [d + "." + lang for d in deps]
             deps += lang_deps
-        return deps
+        existing_deps = [d for d in deps if os.path.exists(d)]
+        for d in deps:
+            # do not warn for inexistent language-specific deps this
+            # would spam the user in many occassions, and was done that
+            # way forever.  (v1.1, the earliest on GitHub, did that)
+            if d not in existing_deps and d not in lang_deps:
+                LOGGER.warning('Dependency {0} (of {1}) does not exist '
+                               'anymore, skipping'.format(d, self.source_path))
+        return existing_deps
 
     def is_translation_available(self, lang):
         """Return true if the translation actually exists."""