Auto building of YUI3 modules

watch.js

var watch = require('watch'),
    spawn = require('child_process').spawn,
    queue = [],
    proc;

function run(path) {
    if (proc) {
        return queue.push(path);
    }

    proc = spawn('ant', ['all'], {
        cwd: __dirname + '/src/' + path,
        env: {
           PATH: process.env.PATH
        }
    });

    console.log("Building " + (path || "all"));

    proc.on('exit', function (code) {
        proc = null;

        if (queue.length > 0) {
            run(queue.shift());
        }
    });
}

function compile(filename) {
    var relativePath = filename.replace(__dirname+'/src/', ''),
        moduleName   = relativePath.split('/')[0];

    console.log("Module: " + moduleName + " just changed");

    // don't compile any build_tmp files
    if (/build_tmp/.test(filename)) {
        return;
    }

    // ignore any of the skui or skui-loader modules
    if (moduleName === 'skui' || moduleName === 'skui-loader') {
        return;
    }

    // if a js or css file changed - just compile that module
    if (/\.(js|css)$/.test(filename)) {
        return run(moduleName);
    } else {
        return run("");
    }
}

watch.createMonitor(__dirname+'/src', function (monitor) {
    monitor.on("created", function (f, stat) {
      // Handle file changes
      console.log("Created: " + f);
      compile(f);
    });
    monitor.on("changed", function (f, curr, prev) {
      // Handle new files
      console.log("Modified: " + f);
      compile(f);
    });
    monitor.on("removed", function (f, stat) {
      // Handle removed files
      console.log("Removed: " + f);
      compile(f);
    });
  });