check if both list and link are provided

src/download/classes/gallery.py

@@ -61,9 +61,12 @@ class Gallery:
         for key, env_var in auth_env.items():
             command += ["-o", f"{key}={os.environ.get(env_var, '')}"]
 
-        if self.link and not self.list:
+        if self.link and self.list:
+            LOG.warning("Both link and list set; using link and ignoring list.")
             command.append(self.link)
-        if self.list and not self.link:
+        elif self.link:
+            command.append(self.link)
+        elif self.list:
             command += ["-i", queue]
 
         LOG.debug(command)