vigil/lib/watch.js

Simple, efficient file watching.

// Generated by CoffeeScript 1.11.1
var debounce, fs, parseArgs, path, ref, vm, walk;

fs = require('fs');

path = require('path');

vm = require('./vm');

walk = require('./walk');

ref = require('./utils'), debounce = ref.debounce, parseArgs = ref.parseArgs;

module.exports = parseArgs(function(basePath, opts, cb) {
  var excluded, modules, relative, watch, watching;
  relative = opts.relative, excluded = opts.excluded;
  if (opts.patch == null) {
    opts.patch = false;
  }
  if (opts.recurse == null) {
    opts.recurse = true;
  }
  if (opts.watchSymlink == null) {
    opts.watchSymlink = false;
  }
  modules = {};
  watching = {};
  watch = function(dir, isModule) {
    var onchange;
    if (isModule) {
      return modules[dir] = true;
    }
    if (watching[dir]) {
      return;
    }
    onchange = function(event, filename) {
      filename = path.join(dir, filename);
      if (excluded(filename)) {
        return;
      }
      return fs.stat(filename, function(err, stats) {
        var ref1;
        if ((err != null) || (stats == null)) {
          return;
        }
        if (stats.isDirectory()) {
          return watch(filename);
        } else if (stats.isSymbolicLink() && opts.watchSymlink) {
          return fs.readLink(filename, function(err, realPath) {
            return watch(path.dirname(realPath));
          });
        } else {
          return cb(filename, stats, (ref1 = modules[filename]) != null ? ref1 : false);
        }
      });
    };
    return watching[dir] = fs.watch(dir, debounce(500, onchange));
  };
  watch(basePath);
  if (opts.recurse) {
    walk(basePath, opts, function(filename, stats) {
      if (excluded(filename)) {
        return;
      }
      if (stats.isDirectory()) {
        return watch(filename);
      }
    });
  }
  if (opts.patch) {
    vm(function(filename, stats) {
      if (excluded(filename)) {
        return;
      }
      if (stats.isDirectory()) {
        return watch(filename, true);
      }
    });
  }
  return watch;
});

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