function _updateContext()

in knative-build/runtimes/javascript/utils/debug.js [140:180]

• 28 lines of code
• 6 McCabe index (conditional complexity)

function _updateContext(callerFunctionLabel){

  try{
    let obj = {};

    Error.stackTraceLimit = 2;
    Error.captureStackTrace(obj, _updateContext);

    let fullStackInfo = obj.stack.split(")\n");
    let rawFunctionInfo = fullStackInfo[1];
    let entryInfo = rawFunctionInfo.split("at ")[1];

    // TODO: if there is no '(' separator, we have no function name; do not split
    // e.g., value would look like: /openwhisk-knative-build/runtimes/javascript/src/service.js:180:19
    if( entryInfo.indexOf(" (") !== -1) {
      let fm = entryInfo.split(" (");
      this.functionName = fm[0];
      this.fullModuleInfo = fm[1];
    } else {
      // assume the entry has the full module name and path (function is a anonymous)
      this.functionName = "anonymous";
      this.fullModuleInfo = entryInfo;
    }

    if( typeof this.fullModuleInfo !== "undefined")
      this.moduleInfo =  this.fullModuleInfo.substring( this.fullModuleInfo.lastIndexOf("/") +1);

    // if explicit label provided, use it over one from stack trace...
    if(typeof(callerFunctionLabel) !== 'undefined') {

      if( this.functionName === "anonymous")
        this.functionName = callerFunctionLabel + "." + this.functionName;
      else
        this.functionName = callerFunctionLabel;
    }

  } catch(e){
    console.error("Unable to parse stack trace: " + e.message);
  }

}