Validate containers.

pype/plugins/global/publish/validate_containers.py

@@ -0,0 +1,28 @@
+import pyblish.api
+
+import pype.lib
+from avalon.tools import cbsceneinventory
+
+
+class ShowInventory(pyblish.api.Action):
+
+    label = "Show Inventory"
+    icon = "briefcase"
+    on = "failed"
+
+    def process(self, context, plugin):
+        cbsceneinventory.show()
+
+
+class ValidateContainers(pyblish.api.ContextPlugin):
+    """Containers are must be updated to latest version on publish."""
+
+    label = "Validate Containers"
+    order = pyblish.api.ValidatorOrder
+    hosts = ["maya", "houdini", "nuke"]
+    optional = True
+    actions = [ShowInventory]
+
+    def process(self, context):
+        if pype.lib.any_outdated():
+            raise ValueError("There are outdated containers in the scene.")