Validate Rig produces no cycle errors

openpype/hosts/maya/plugins/publish/validate_rig_cycle_error.py

@@ -0,0 +1,36 @@
+from maya import cmds
+
+import pyblish.api
+
+from avalon import maya
+
+import openpype.api
+import openpype.hosts.maya.api.action
+from openpype.hosts.maya.api.lib import undo_chunk
+
+
+class ValidateRigCycleError(pyblish.api.InstancePlugin):
+    """Validate rig nodes produce have no cycle errors."""
+
+    order = openpype.api.ValidateContentsOrder + 0.05
+    label = "Rig Cycle Errors"
+    hosts = ["maya"]
+    families = ["rig"]
+    actions = [openpype.hosts.maya.api.action.SelectInvalidAction]
+    optional = True
+
+    def process(self, instance):
+        invalid = self.get_invalid(instance)
+        if invalid:
+            raise RuntimeError("Rig nodes produce a cycle error: %s" % invalid)
+
+    @classmethod
+    def get_invalid(cls, instance):
+
+        with maya.maintained_selection():
+            cmds.select(instance[:], noExpand=True)
+            plugs = cmds.cycleCheck(all=False,  # check selection only
+                                    list=True)
+            invalid = cmds.ls(plugs, objectsOnly=True, long=True)
+            return invalid
+