vigil/lib/run.js

Simple, efficient file watching.

// Generated by CoffeeScript 1.11.1
var _watch, cluster, fs, path, utils, watch;

cluster = require('cluster');

fs = require('fs');

path = require('path');

utils = require('./utils');

watch = require('./watch');

_watch = function(dir) {
  return require('vigil').watch(dir, function(filename, stats, isModule) {
    console.log(filename + " changed, reloading");
    return process.exit(0);
  });
};

module.exports = function(fn, cb) {
  if (cb == null) {
    cb = function() {};
  }
  return utils.tmpFile('.worker-tmp', function(err, filename, fd) {
    var code;
    if (err != null) {
      throw err;
    }
    code = "// try to require coffee-script so subsequent requires to coffee files works\ntry {\n  // CoffeeScript 1.7+\n  require('coffee-script/register');\n} catch (err) {\n  // do nothing, coffee-script isn't supported, oh well\n}\n\n// change mainModule to fake file in cwd, so requires work as expected\nprocess.mainModule.filename = '" + (path.join(process.cwd(), 'tmp-worker')) + "';\n\n// set __dirname\n__dirname = '" + (process.cwd()) + "';\n\n// start watching cwd for changes\n(" + (_watch.toString().replace('vigil', __dirname)) + "('" + (process.cwd()) + "'));\n\n// execute callback as worker process\n(" + (fn.toString()) + "());";
    return fs.write(fd, code, 0, 'utf8', function(err) {
      if (err != null) {
        throw err;
      }
      return fs.close(fd, function() {
        cluster.setupMaster({
          exec: filename,
          silent: false
        });
        cluster.fork();
        cluster.on('exit', function(worker, code, signal) {
          return cluster.fork();
        });
        return cluster.once('listening', function() {
          return cb();
        });
      });
    });
  });
};

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