Group clipping mask

Try this script. YOU HAVE TO HAVE THE GROUP CLIPPING MASK SELECTED! There is no error checking, so it will also clip to any layer, like an adjustment layer, which will just show the entire image of the clipping layer.

#target photoshop
var doc = activeDocument;
var cLay = doc.activeLayer;
selNextLayer ();
var gp = doc.activeLayer;
var layA =[];

for(var i=0;i<gp.layers.length;i++){
    layA.push(gp.layers[i]);
    };

for(var i=0;i<layA.length;i++){
    doc.activeLayer = cLay;
    dupe ();
    var mLay = doc.activeLayer;
    mLay.move (layA[i], ElementPlacement.PLACEBEFORE);
    mLay.grouped = true;    
    }

cLay.remove();

function dupe(){
    var idCpTL = charIDToTypeID( "CpTL" );
    executeAction( idCpTL, undefined, DialogModes.NO );    
    }

function selNextLayer(){
    var idslct = charIDToTypeID( "slct" );
        var desc2 = new ActionDescriptor();
        var idnull = charIDToTypeID( "null" );
            var ref1 = new ActionReference();
            var idLyr = charIDToTypeID( "Lyr " );
            var idOrdn = charIDToTypeID( "Ordn" );
            var idBckw = charIDToTypeID( "Bckw" );
            ref1.putEnumerated( idLyr, idOrdn, idBckw );
        desc2.putReference( idnull, ref1 );
        var idMkVs = charIDToTypeID( "MkVs" );
        desc2.putBoolean( idMkVs, false );
        var idLyrI = charIDToTypeID( "LyrI" );
            var list1 = new ActionList();
            list1.putInteger( 2 );
        desc2.putList( idLyrI, list1 );
    executeAction( idslct, desc2, DialogModes.NO );    
    }