write json file and store path per instance

colorbleed/plugins/fusion/publish/extract_image_sequence.py

@@ -1,3 +1,7 @@
+import json
+import os
+import re
+
 import pyblish.api
 
 
@@ -26,3 +30,32 @@ class ExtractImageSequence(pyblish.api.Extractor):
         result = current_comp.Render()
         if not result:
             raise RuntimeError("Comp render failed")
+
+        # Write metadata json file per Saver instance
+        instances = [i for i in context[:] if i[0].ID == "Saver"]
+        for instance in instances:
+            subset = instance.data["subset"]
+            ext = instance.data["ext"]
+
+            # Regex to match resulting renders
+            regex = "^{subset}.*[0-9]+.{ext}+$".format(subset=re.escape(subset)
+                                                       , ext=re.escape(ext))
+
+            # The instance has most of the information already stored
+            metadata = {
+                "regex": regex,
+                "startFrame": context.data["startFrame"],
+                "endFrame": context.data["endFrame"],
+                "families": ["colorbleed.imagesequence"],
+            }
+
+            # Write metadata and store the path in the instance
+            output_directory = instance.data["outputDir"]
+            path = os.path.join(output_directory,
+                                "{}_metadata.json".format(subset))
+
+            with open(path, "w") as f:
+                json.dump(metadata, f)
+
+            # Store json path in instance
+            instance.data["jsonpath"] = path