added regex for version check in source filename

pype/hosts/standalonepublisher/plugins/publish/collect_matching_asset.py

@@ -1,4 +1,5 @@
 import os
+import re
 import collections
 import pyblish.api
 from avalon import io
@@ -16,6 +17,9 @@ class CollectMatchingAssetToInstance(pyblish.api.InstancePlugin):
     hosts = ["standalonepublisher"]
     families = ["background_batch"]
 
+    # Version regex to parse asset name and version from filename
+    version_regex = re.compile(r"^(.+)_v([0-9]+)$")
+
     def process(self, instance):
         source_file = os.path.basename(instance.data["source"]).lower()
         self.log.info("Looking for asset document for file \"{}\"".format(