Added validator for vdb animation settings

colorbleed/plugins/houdini/publish/validate_animation_settings.py

@@ -0,0 +1,50 @@
+import pyblish.api
+
+from colorbleed.houdini import lib
+
+
+class ValidateAnimationSettings(pyblish.api.InstancePlugin):
+    """Validate if the unexpanded string contains the frame ('$F') token
+
+    This validator will only check the output parameter of the node if
+    the Valid Frame Range is not set to 'Render Current Frame'
+
+    Rules:
+        If you render out a frame range it is mandatory to have the
+        frame token - '$F4' or similar - to ensure that each frame gets
+        written. If this is not the case you will override the same file
+        every time a frame is written out.
+
+    Examples:
+        Good: 'my_vbd_cache.$F4.vdb'
+        Bad: 'my_vbd_cache.vdb'
+
+    """
+
+    order = pyblish.api.ValidatorOrder
+    label = "Validate Frame Settings"
+    families = ["colorbleed.vdbcache"]
+
+    def process(self, instance):
+
+        invalid = self.get_invalid(instance)
+        if invalid:
+            raise RuntimeError("Output settings do no match for '%s'" %
+                               instance)
+
+    @classmethod
+    def get_invalid(cls, instance):
+
+        node = instance[0]
+
+        # Check trange parm, 0 means Render Current Frame
+        frame_range = node.evalParm("trange")
+        if frame_range == 0:
+            return []
+
+        output_parm = lib.get_output_parameter(node)
+        unexpanded_str = output_parm.unexpandedString()
+
+        if "$F" not in unexpanded_str:
+            cls.log.error("No frame token found in '%s'" % node.path())
+            return [instance]