如何在Node.js中记录所有require（）？

require()ing all of our code in a Node.js script is taking a while. How can I instrument require() to see what's being loaded?

require（）我们在Node.js脚本中的所有代码需要一段时间。如何检测require（）以查看正在加载的内容？

This is difficult because, according to the docs,

这很难，因为根据文档，

require isn't actually a global but rather local to each module.

require实际上并不是全局的，而是每个模块的本地。

So this doesn't work:

所以这不起作用：

(function() {
  var slice = [].slice;
  var old = global.require;
  global.require = function() {
    var args = 1 <= arguments.length ? slice.call(arguments, 0) : [];
    console.log("REQUIRE", args); // Log it!
    return old.apply(null, args);
  };
})();

Any ideas?

有任何想法吗？

1 个解决方案

#1

You can override require, it's defined in node/lib/module.js. Same module is passed to all files being required. If you change reference in the first file, it'll be reused later.

您可以覆盖require，它在node / lib / module.js中定义。将相同的模块传递给所需的所有文件。如果您在第一个文件中更改引用，它将在以后重用。

_oldRequire = module.require;
module.require = function(id) {
  var ts = process.hrtime();
  var res = _oldRequire.call(module, id);
  var t = process.hrtime(ts);
  console.log('require(\'%s\') took %s ms', id, t[0]*1000 + t[1]/1e6);
  return res;
};
require('./test123.js');

Update - version which propagates properly to nested require:

更新 - 正确传播到嵌套的版本需要：

var Module = require('module');

_oldRequire = Module.prototype.require

Module.prototype.require = function(id) {
  var ts = process.hrtime()
  var res = _oldRequire.call(this, id);
  var t = process.hrtime(ts)
  console.log('require(\'%s\') took %s ms', id, t[0]*1000 + t[1]/1e6)
  return res;
}

#1