figure out what is trying to write to a stream in node

output.txt

Trace
    at WriteStream.process.stdout.write (/Users/dave/dev/node-latest/index.js:4:11)
    at Object.exports.log (console.js:25:18)
    at Object.keys.forEach.console.(anonymous function) [as log] (/Users/dave/dev/node-latest/node_modules/log-timestamp/index.js:13:14)
    at defaultCb (/Users/dave/dev/node-latest/node_modules/npm/lib/npm.js:205:16)
    at Conf.done (/Users/dave/dev/node-latest/node_modules/npm/node_modules/npmconf/npmconf.js:218:15)
    at Object.oncomplete (fs.js:297:15)
undefined


... and find out the npm module is firing a default callback because I didn't supply one, that logs to stdout.

streamsnoop.js

/**
 * overwrite the process.stdout.write function to call console.trace first
 */

var a = process.stdout.write;
process.stdout.write = function() {
  console.trace();
  a.apply(this, arguments);
};