add headless abstraction into command.py

openpype/hosts/nuke/api/command.py

@@ -2,6 +2,8 @@ import logging
 import contextlib
 import nuke
 
+from qtpy import QtWidgets
+
 log = logging.getLogger(__name__)
 
 
@@ -19,3 +21,11 @@ def viewer_update_and_undo_stop():
         yield
     finally:
         nuke.Undo.enable()
+
+
+def is_headless():
+    """
+    Returns:
+        bool: headless
+    """
+    return QtWidgets.QApplication.instance() is None

openpype/hosts/nuke/api/lib.py

@@ -3155,11 +3155,3 @@ def get_viewer_config_from_string(input_string):
             ).format(input_string))
 
     return (display, viewer)
-
-
-def is_headless():
-    """
-    Returns:
-        bool: headless
-    """
-    return QtWidgets.QApplication.instance() is None

openpype/hosts/nuke/api/workio.py

@@ -1,7 +1,7 @@
 """Host API required Work Files tool"""
 import os
 import nuke
-from qtpy import QtWidgets
+from .command import is_headless
 
 
 def file_extensions():
@@ -26,8 +26,7 @@ def open_file(filepath):
     # To remain in the same window, we have to clear the script and read
     # in the contents of the workfile.
     nuke.scriptClear()
-    headless = QtWidgets.QApplication.instance() is None
-    if not headless:
+    if not is_headless():
         autosave = nuke.toNode("preferences")["AutoSaveName"].evaluate()
         autosave_prmpt = "Autosave detected.\nWould you like to load the autosave file?"       # noqa
         if os.path.isfile(autosave) and nuke.ask(autosave_prmpt):