code review fix

-update install_maya_plugin.sh
-add check that optionVar exists

Author: vkovec

Assets/Integrations/Autodesk/maya/scripts/install_maya_plugin.sh

@@ -58,10 +58,11 @@ else
     # Configure Maya Integration
     TEMP_SAVE_PATH="_safe_to_delete"
     EXPORT_SETTINGS_PATH="Integrations/Autodesk/maya/scripts/unityFbxExportSettings.mel"
+    MAYA_INSTRUCTION_PATH="_safe_to_delete/_temp.txt"
     HEADLESS=1
 
     # NOTE: we need start Maya in UI mode so that we can correctly configure the auto-load of the plugin.
-    "${MAYA_PATH}" -command "configureUnityOneClick \"${PROJECT_PATH}\" \"${UNITY_EDITOR_PATH}\" \"${TEMP_SAVE_PATH}\" \"${EXPORT_SETTINGS_PATH}\" ${HEADLESS}; scriptJob -idleEvent quit;"
+    "${MAYA_PATH}" -command "configureUnityOneClick \"${PROJECT_PATH}\" \"${UNITY_EDITOR_PATH}\" \"${TEMP_SAVE_PATH}\" \"${EXPORT_SETTINGS_PATH}\" \"${MAYA_INSTRUCTION_PATH}\" ${HEADLESS}; scriptJob -idleEvent quit;"
 fi
 
 exit 0

Assets/Integrations/Autodesk/maya/scripts/unityOneClick/commands.py

@@ -270,7 +270,11 @@ def doIt(self, args):
         unityProjectPath = maya.cmds.optionVar(q='UnityProject')
         unityTempSavePath = os.path.join(unityProjectPath, "Assets", maya.cmds.optionVar(q='UnityTempSavePath'))
         unityCommand = "FbxExporters.Review.TurnTable.LastSavedModel"
-        instructionFile = os.path.join(unityProjectPath, "Assets", maya.cmds.optionVar(q='UnityInstructionPath'))
+        if maya.cmds.optionVar(exists='UnityInstructionPath'):
+            instructionFile = os.path.join(unityProjectPath, "Assets", maya.cmds.optionVar(q='UnityInstructionPath'))
+        else:
+            self.displayError("Missing Unity instruction file path, please re-install integration.")
+            return
 
         if not self.loadUnityFbxExportSettings():
             return