Merged in feature/PYPE-478-frame-start-from-source-frame-n (pull request #264)

Feature/PYPE-478 frame start from source frame n

Approved-by: Milan Kolar <milan@orbi.tools>

pype/plugins/nukestudio/publish/collect_tag_framestart.py

@@ -1,5 +1,5 @@
 from pyblish import api
-
+import os
 
 class CollectClipTagFrameStart(api.InstancePlugin):
     """Collect FrameStart from Tags of selected track items."""
@@ -19,8 +19,20 @@ class CollectClipTagFrameStart(api.InstancePlugin):
 
             # gets only task family tags and collect labels
             if "frameStart" in t_family:
+                t_value = t_metadata.get("tag.value", "")
+
+                # backward compatibility
                 t_number = t_metadata.get("tag.number", "")
-                start_frame = int(t_number)
+
+                try:
+                    start_frame = int(t_number) or int(t_value)
+                except ValueError:
+                    if "source" in t_value:
+                        source_first = instance.data["sourceFirst"]
+                        source_in = instance.data["sourceIn"]
+                        handle_start = instance.data["handleStart"]
+                        start_frame = (source_first + source_in) - handle_start
+
                 instance.data["startingFrame"] = start_frame
                 self.log.info("Start frame on `{0}` set to `{1}`".format(
                     instance, start_frame