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GetPipelineHooks.ds
/**
* Name: GetHookPipeline.ds    
*
* Description:
*   Gets the configiured hook pipeline, if not found it returns EmptyHook-Start 
*
*   @input hookName : String                    The property key of the Hook
*   @input fallbackHookPipeline : String       The pipeline, which should be used as a fallback, if the hook is not defined in the current site
*   @output hookPipeline : String               The hook pipeline to call
*
*/
importPackage( dw.system );
importPackage( dw.web );

function execute( pdict : PipelineDictionary ) : Number {
     // the name of the resource bundle that stores the hooks
     var BUNDLE_KEY : String = "_hooks";

     // define a default hook
     var hook : String ="EmptyHook-Start";
    
     // check for configured fallback
     if (!empty(pdict.fallbackHookPipeline)) {
          hook = pdict.fallbackHookPipeline;
     }
         
     // check for configured pipeline hook name
    if (!empty(pdict.hookName)) {
        var configValue : String = Resource.msg(pdict.hookName,BUNDLE_KEY,"");
        if (!empty(configValue)) {
             hook = configValue;
        }
    }
   
    pdict.hookPipeline = hook;
   
    return PIPELET_NEXT;
}

Create EmptyHook-Start Pipeline or substitute other default empty Pipeline

fallbackHookPipeline = null
hookName = "cart.calculation"
hookPipeline = CartCalculationHook
ScriptLog = ScriptLog


Call Node
Use Pipeline from Dictionary Key CartCalculationHook

_hooks.properties
cart.calculation=TR_Custom-BasketCookieCallback