[artstation] add 'max-posts' option (#3270)

docs/configuration.rst

@@ -885,6 +885,16 @@ Description
     Try to follow external URLs of embedded players.
 
 
+extractor.artstation.max-posts
+------------------------------
+Type
+    ``integer``
+Default
+    ``null``
+Description
+    Limit the number of posts/projects to download.
+
+
 extractor.artstation.search.pro-first
 -------------------------------------
 Type

gallery_dl/extractor/artstation.py

@@ -10,6 +10,7 @@
 
 from .common import Extractor, Message
 from .. import text, util, exception
+import itertools
 import random
 import string
 
@@ -31,7 +32,12 @@ class ArtstationExtractor(Extractor):
     def items(self):
         data = self.metadata()
 
-        for project in self.projects():
+        projects = self.projects()
+        max_posts = self.config("max-posts")
+        if max_posts:
+            projects = itertools.islice(projects, max_posts)
+
+        for project in projects:
             for num, asset in enumerate(
                     self.get_project_assets(project["hash_id"]), 1):
                 asset.update(data)