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index.js 1.1KB

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  1. "use strict";
  2. // Call this function in a another function to find out the file from
  3. // which that function was called from. (Inspects the v8 stack trace)
  4. //
  5. // Inspired by http://stackoverflow.com/questions/13227489
  6. module.exports = function getCallerFile(position) {
  7. if (position === void 0) { position = 2; }
  8. if (position >= Error.stackTraceLimit) {
  9. throw new TypeError('getCallerFile(position) requires position be less then Error.stackTraceLimit but position was: `' + position + '` and Error.stackTraceLimit was: `' + Error.stackTraceLimit + '`');
  10. }
  11. var oldPrepareStackTrace = Error.prepareStackTrace;
  12. Error.prepareStackTrace = function (_, stack) { return stack; };
  13. var stack = new Error().stack;
  14. Error.prepareStackTrace = oldPrepareStackTrace;
  15. if (stack !== null && typeof stack === 'object') {
  16. // stack[0] holds this file
  17. // stack[1] holds where this function was called
  18. // stack[2] holds the file we're interested in
  19. return stack[position] ? stack[position].getFileName() : undefined;
  20. }
  21. };
  22. //# sourceMappingURL=index.js.map