DOLLAR_GUI_HANDLER is a node to remove $gui expressions on Nuke nodes in a script. It is based on $gui Expression Finder by Falk Hofmann, but the code is re-written to be more robust, and to have functionality to remove $gui expressions as if the script were being rendered on the farm, instead of reverting back to the GUI values.

DOLLAR_GUI_HANDLER.nk

NoOp {
 name DOLLAR_GUI_HANDLER
 tile_color 0xd94848ff
 hide_input true
 addUserKnob {20 Handler l "\$gui Handler"}
 addUserKnob {1 nodelist}
 nodelist "H_high_low_switch.Switch1, RF_Yorktown_DEFOCUS.SHIT_SWITCHER, RF_Yorktown_BG1.ScanlineRender4, ScanlineRender1"
 addUserKnob {26 ""}
 addUserKnob {22 find_gui_nodes l "Find \$gui Nodes" T "# Find all nodes with knobs that have \$gui expressions\nnodelist = \[]\nfor node in nuke.allNodes(recurseGroups=True):\n    for knob in node.knobs():\n        if node\[knob].hasExpression():\n            if '\$gui' in node\[knob].toScript():\n                if node not in nodelist:\n                    nodelist.append(node)\n\nnodelist_comma = ', '.join(\[item.fullName() for item in nodelist])\nprint nodelist_comma\nnuke.thisNode()\['nodelist'].setValue(nodelist_comma)" +STARTLINE}
 addUserKnob {22 remove_gui_expression l "Remove \$gui Expression" -STARTLINE T "# Remove \$gui expression\n#thisNode = nuke.selectedNode()\nthisNode = nuke.thisNode()\nnodelist_comma = thisNode\['nodelist'].value()\nnodelist = \[nuke.toNode(node) for node in nodelist_comma.split(', ')]\nfor node in nodelist:\n    for knobname in node.knobs():\n        knob = node\[knobname]\n        # Test is knob is multi-dimensional\n        try:\n            knobwidth = knob.width()\n        except AttributeError:\n            knobwidth=1\n        for idx in range(knobwidth):\n            if knob.hasExpression(idx):\n                knob_expr = knob.animation(idx).expression()\n                if '\$gui' in knob_expr:\n                    print \"WORKING ON:\", knob.name(), idx\n\n                    new_knob_expr = knob_expr.replace(\"\$gui\", \"0\")\n\n                    print node.name() + '.' + knob.name() + \": \" + knob_expr\n                    print node.name() + '.' + knob.name() + \": \" + new_knob_expr\n\n                    knob.setExpression(new_knob_expr, idx)\n                    print \"New Expression is: \", new_knob_expr\n                    knob.clearAnimated(idx)"}
 addUserKnob {26 ""}
 addUserKnob {22 select_nodes l "Select Nodes" -STARTLINE T "# Select all nodes that have been found with \$gui expressions\nthisNode = nuke.thisNode()\nnodelist_comma = thisNode\['nodelist'].value()\nnodelist = \[nuke.toNode(node) for node in nodelist_comma.split(', ')]\n\[n.setSelected(False) for n in nuke.allNodes(recurseGroups=True)]\nfor node in nodelist:\n    node.setSelected(True)"}
 addUserKnob {22 label_gui_nodes l "Add Label to Nodes" -STARTLINE T "# Mark node in label\nthisNode = nuke.thisNode()\nnodelist_comma = thisNode\['nodelist'].value()\nnodelist = \[nuke.toNode(node) for node in nodelist_comma.split(', ')]\n\nfor node in nodelist:\n    labelvalue = node\['label'].getValue()\n    if not labelvalue:\n        node\['label'].setValue('HAS \$GUI EXPRESSION')\n    else:\n        node\['label'].setValue('\{0\}\\nHAS \$GUI EXPRESSION'.format(labelvalue))"}
 addUserKnob {26 ""}
}