vigil/lib/vm.js

Simple, efficient file watching.

// Generated by CoffeeScript 1.11.1
var fs, patch, path;

fs = require('fs');

path = require('path');

patch = require('./patch');

module.exports = function(cb) {
  var found, hooks, seen, updateHooks;
  hooks = {};
  seen = {};
  found = function(filename) {
    var dir;
    dir = path.dirname(filename);
    if (!seen[dir]) {
      seen[dir] = true;
      fs.stat(dir, function(err, stats) {
        if (stats == null) {
          return;
        }
        return cb(dir, stats);
      });
    }
    return fs.stat(filename, function(err, stats) {
      if (stats == null) {
        return;
      }
      return cb(filename, stats);
    });
  };
  updateHooks = function() {
    var ext, handler, ref, results;
    ref = require.extensions;
    results = [];
    for (ext in ref) {
      handler = ref[ext];
      results.push((function(ext, handler) {
        if (hooks[ext] !== require.extensions[ext]) {
          return hooks[ext] = require.extensions[ext] = function(module, filename) {
            if (!module.loaded) {
              found(module.filename);
            }
            handler(module, filename);
            return updateHooks();
          };
        }
      })(ext, handler));
    }
    return results;
  };
  updateHooks();
  return patch(found);
};

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