Update

2023/scripts/rigging_tools/ngskintools2/ui/shelf.py

@@ -0,0 +1,41 @@
+from maya import cmds, mel
+
+
+def install_shelf():
+    """
+    checks if there's ngSkintTools shelf installed, and if not, creates one.
+
+    this runs each time Maya starts (via Autoloader's ngSkinTools_load.mel) - avoid duplication, like creating things
+    that already exist.
+    """
+
+    # don't do anything if we're in batch mode. UI commands are not available
+    if cmds.about(batch=True) == 1:
+        return
+
+    maya_shelf = mel.eval("$tempngSkinTools2Var=$gShelfTopLevel")
+    existing_shelves = cmds.shelfTabLayout(maya_shelf, q=True, tabLabel=True)
+
+    parent_shelf = 'ngSkinTools2'
+
+    if parent_shelf in existing_shelves:
+        return
+
+    mel.eval('addNewShelfTab ' + parent_shelf)
+    cmds.shelfButton(
+        parent=parent_shelf,
+        enable=1,
+        visible=1,
+        preventOverride=0,
+        label="ngst",
+        annotation="opens ngSkinTools2 UI",
+        image="ngSkinTools2ShelfIcon.png",
+        style="iconOnly",
+        noBackground=1,
+        align="center",
+        marginWidth=1,
+        marginHeight=1,
+        command="import ngSkinTools2; ngSkinTools2.open_ui()",
+        sourceType="python",
+        commandRepeatable=0,
+    )